| 1 | //! The repos service: repository metadata, contents, forks, landing, and |
| 2 | //! git over HTTPS. |
| 3 | //! |
| 4 | //! Other services reach it over `POST /rpc/<method>`; see |
| 5 | //! `g1t_contracts::repos` for the methods and their arguments. Any other |
| 6 | //! request is treated as git's smart HTTP protocol. |
| 7 | |
| 8 | mod backups; |
| 9 | mod blame; |
| 10 | mod catch_up; |
| 11 | mod coalesce; |
| 12 | mod commit_file; |
| 13 | mod diff; |
| 14 | mod forks; |
| 15 | mod git_http; |
| 16 | mod git_ops; |
| 17 | mod import; |
| 18 | mod land; |
| 19 | mod last_commits; |
| 20 | mod lifecycle; |
| 21 | mod listing; |
| 22 | mod meters; |
| 23 | mod mirror; |
| 24 | mod pack_cache; |
| 25 | mod pack_limits; |
| 26 | mod refs; |
| 27 | mod refs_cache; |
| 28 | mod registry; |
| 29 | mod resilience; |
| 30 | mod run_access; |
| 31 | mod secret_scan; |
| 32 | mod shards; |
| 33 | mod shared; |
| 34 | mod store; |
| 35 | mod transfer; |
| 36 | |
| 37 | use g1t_contracts::events::{ |
| 38 | Event, GitPush, NewEvent, Publish, RepoCreated, RepoForked, RepoUpdated, WorkspaceDeleted, |
| 39 | WorkspaceDeleting, WorkspaceRenamed, WorkspaceRestored, |
| 40 | }; |
| 41 | use g1t_contracts::access::{self, Capability}; |
| 42 | use g1t_contracts::repos::*; |
| 43 | use g1t_contracts::time::rfc3339; |
| 44 | use g1t_contracts::{FailureCode, Outcome, PrincipalKind, User, Viewer, is_valid_repo_name, new_id}; |
| 45 | use g1t_kit::{args, now_ms, reply, rpc_method}; |
| 46 | use std::collections::{HashMap, HashSet, VecDeque}; |
| 47 | use std::rc::Rc; |
| 48 | |
| 49 | use serde::Serialize; |
| 50 | use worker::{ |
| 51 | Context, Env, Fetcher, MessageBatch, Method, Request, Response, Result, ScheduleContext, ScheduledEvent, |
| 52 | event, |
| 53 | }; |
| 54 | |
| 55 | use registry::{Registry, can_read, can_write, store_key}; |
| 56 | use store::{ArtifactsStore, GitRepo, GitStore, Scope}; |
| 57 | |
| 58 | /// Namespace that holds every pull request's fork: `pulls/<pull id>`. |
| 59 | pub(crate) const PULLS_NAMESPACE: &str = "pulls"; |
| 60 | const MAX_TEXT_BYTES: usize = 512 * 1024; |
| 61 | /// How far back a pull request may have forked and still be landed. |
| 62 | const MAX_ANCESTRY: u32 = 1000; |
| 63 | /// The most tags a repository's Tags page reads and lists. |
| 64 | const MAX_TAGS_READ: usize = 100; |
| 65 | |
| 66 | /// One path segment, percent-encoded for a cache key. |
| 67 | fn urlencoding_segment(segment: &str) -> String { |
| 68 | segment |
| 69 | .bytes() |
| 70 | .map(|b| if b.is_ascii_alphanumeric() || b"-._~".contains(&b) { (b as char).to_string() } else { format!("%{b:02X}") }) |
| 71 | .collect() |
| 72 | } |
| 73 | const MAX_DESCRIPTION_CHARS: usize = 200; |
| 74 | pub(crate) const SOURCE: &str = "repos"; |
| 75 | pub(crate) const UNVERIFIED: &str = "Confirm your email address first. Check your inbox, or resend the link from the banner on g1t.sh."; |
| 76 | |
| 77 | pub(crate) fn not_found<T>() -> Outcome<T> { |
| 78 | Outcome::fail(FailureCode::NotFound, "Repository not found.") |
| 79 | } |
| 80 | |
| 81 | /// Decoded text, or `None` when the file is too large or looks binary. |
| 82 | /// Whether a ref is a full commit hash rather than a branch name. |
| 83 | fn is_commit_hash(git_ref: &str) -> bool { |
| 84 | git_ref.len() == 40 && git_ref.bytes().all(|b| b.is_ascii_hexdigit()) |
| 85 | } |
| 86 | |
| 87 | fn text_of(bytes: Vec<u8>) -> Option<String> { |
| 88 | if bytes.len() > MAX_TEXT_BYTES || bytes.contains(&0) { |
| 89 | return None; |
| 90 | } |
| 91 | Some(String::from_utf8_lossy(&bytes).into_owned()) |
| 92 | } |
| 93 | |
| 94 | fn is_readme(name: &str) -> bool { |
| 95 | matches!( |
| 96 | name.to_lowercase().as_str(), |
| 97 | "readme" | "readme.md" | "readme.markdown" | "readme.txt" |
| 98 | ) |
| 99 | } |
| 100 | |
| 101 | /// Whether `ancestor` is reachable from the newest commit in `history`. |
| 102 | /// |
| 103 | /// `history` is the first-parent chain, which is all the store lists; a fork |
| 104 | /// that merged the target branch in has the target's head on a second |
| 105 | /// parent, so the walk follows every parent. |
| 106 | async fn descends_from<R: GitRepo>(repo: &R, history: &[Commit], ancestor: &str) -> Result<bool> { |
| 107 | let known: HashMap<&str, &[String]> = history |
| 108 | .iter() |
| 109 | .map(|commit| (commit.hash.as_str(), commit.parents.as_slice())) |
| 110 | .collect(); |
| 111 | let mut seen = HashSet::new(); |
| 112 | let mut queue: Vec<String> = history |
| 113 | .first() |
| 114 | .map(|c| c.hash.clone()) |
| 115 | .into_iter() |
| 116 | .collect(); |
| 117 | while let Some(hash) = queue.pop() { |
| 118 | if hash == ancestor { |
| 119 | return Ok(true); |
| 120 | } |
| 121 | if !seen.insert(hash.clone()) || seen.len() > MAX_ANCESTRY as usize { |
| 122 | continue; |
| 123 | } |
| 124 | match known.get(hash.as_str()) { |
| 125 | Some(parents) => queue.extend(parents.iter().cloned()), |
| 126 | None => queue.extend(repo.parents(&hash).await?.unwrap_or_default()), |
| 127 | } |
| 128 | } |
| 129 | Ok(false) |
| 130 | } |
| 131 | |
| 132 | /// The commit closest to the newest in `history` that is also in `shared`: |
| 133 | /// where a fork and the repository it came from last agreed. |
| 134 | async fn nearest_ancestor_in<R: GitRepo>( |
| 135 | repo: &R, |
| 136 | history: &[Commit], |
| 137 | shared: &HashSet<String>, |
| 138 | ) -> Result<Option<String>> { |
| 139 | let known: HashMap<&str, &[String]> = history |
| 140 | .iter() |
| 141 | .map(|commit| (commit.hash.as_str(), commit.parents.as_slice())) |
| 142 | .collect(); |
| 143 | let mut seen = HashSet::new(); |
| 144 | let mut queue: VecDeque<String> = history |
| 145 | .first() |
| 146 | .map(|c| c.hash.clone()) |
| 147 | .into_iter() |
| 148 | .collect(); |
| 149 | while let Some(hash) = queue.pop_front() { |
| 150 | if shared.contains(&hash) { |
| 151 | return Ok(Some(hash)); |
| 152 | } |
| 153 | if !seen.insert(hash.clone()) || seen.len() > MAX_ANCESTRY as usize { |
| 154 | continue; |
| 155 | } |
| 156 | match known.get(hash.as_str()) { |
| 157 | Some(parents) => queue.extend(parents.iter().cloned()), |
| 158 | None => queue.extend(repo.parents(&hash).await?.unwrap_or_default()), |
| 159 | } |
| 160 | } |
| 161 | Ok(None) |
| 162 | } |
| 163 | |
| 164 | thread_local! { |
| 165 | /// Targets' sides of mergeability, by head (coalesce.rs). |
| 166 | static TARGETS: std::cell::RefCell<coalesce::Memo<coalesce::TargetKey, Rc<coalesce::TargetSide>>> = |
| 167 | std::cell::RefCell::new(coalesce::Memo::new(coalesce::TARGET_TTL_MS, 32)); |
| 168 | /// What targets changed between two trees. |
| 169 | static THEIRS: std::cell::RefCell<coalesce::Memo<coalesce::TheirsKey, (Vec<String>, bool)>> = |
| 170 | std::cell::RefCell::new(coalesce::Memo::new(coalesce::THEIRS_TTL_MS, 256)); |
| 171 | /// What repositories hold, as read for a push's first request, for the |
| 172 | /// same push's second: a push's POST does not wait on the database. |
| 173 | static HELD: std::cell::RefCell<coalesce::Memo<String, u64>> = |
| 174 | std::cell::RefCell::new(coalesce::Memo::new(60_000, 512)); |
| 175 | } |
| 176 | |
| 177 | pub(crate) struct Repos<S: GitStore> { |
| 178 | registry: Registry, |
| 179 | store: S, |
| 180 | events: Fetcher, |
| 181 | /// Asked during a push which secrets have been allowed. |
| 182 | security: Option<Fetcher>, |
| 183 | /// Asked whether a workspace is on a plan, for its private storage. |
| 184 | billing: Option<Fetcher>, |
| 185 | /// Told when a repository moves, for the tokens of agents at work on it. |
| 186 | identity: Option<Fetcher>, |
| 187 | /// What a free workspace's private repositories may hold. |
| 188 | free_private_bytes: i64, |
| 189 | /// Days a pull request's working copy is kept after it settles (forks.rs). |
| 190 | pub(crate) fork_days: u64, |
| 191 | /// The most a repository may hold (pack_limits.rs), and what happens |
| 192 | /// to a push too large to scan. |
| 193 | repo_limit: u64, |
| 194 | large_pushes: git_http::LargePushes, |
| 195 | /// Which git store namespace new repositories go in (shards.rs). |
| 196 | placement: shards::Placement, |
| 197 | /// What isolates share: answers that list refs (refs_cache.rs). |
| 198 | shared: Option<Rc<shared::Shared>>, |
| 199 | /// Packs for fresh clones (pack_cache.rs); `None` without the bucket. |
| 200 | packs: Option<Rc<pack_cache::R2Packs>>, |
| 201 | } |
| 202 | |
| 203 | impl<S: GitStore> Repos<S> { |
| 204 | /// Records that the refs of the repository with this id changed, once |
| 205 | /// they have, so that the answers kept that list them go stale (see |
| 206 | /// refs_cache.rs). Everything that changes a repository's refs calls |
| 207 | /// this after it (`every_ref_writer_records_the_change` checks). A |
| 208 | /// failure is logged: the change itself happened, and what was kept |
| 209 | /// expires within `refs_cache::TTL_SECONDS` regardless. |
| 210 | pub(crate) async fn refs_moved(&self, repo_id: &str) { |
| 211 | if let Err(error) = self.registry.refs_moved(repo_id).await { |
| 212 | worker::console_error!("refs of {repo_id} changed but not recorded: {error}"); |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | pub(crate) async fn publish<T: Serialize>(&self, event: NewEvent<T>) -> Result<()> { |
| 217 | g1t_kit::call( |
| 218 | &self.events, |
| 219 | "publish", |
| 220 | &Publish { |
| 221 | events: vec![event], |
| 222 | }, |
| 223 | ) |
| 224 | .await |
| 225 | } |
| 226 | |
| 227 | /// Whether the viewer may read `repo`. A pull request's fork of a |
| 228 | /// private repository can be read by everyone who can read that |
| 229 | /// repository, so its members can review and check out the change, as |
| 230 | /// well as by whoever opened the pull request. |
| 231 | async fn may_read(&self, repo: &Repo, viewer: &Viewer) -> Result<bool> { |
| 232 | if can_read(repo, viewer) { |
| 233 | return Ok(true); |
| 234 | } |
| 235 | let Some(source_id) = &repo.fork_of else { |
| 236 | return Ok(false); |
| 237 | }; |
| 238 | Ok(self |
| 239 | .registry |
| 240 | .by_id(source_id) |
| 241 | .await? |
| 242 | .is_some_and(|source| can_read(&source, viewer))) |
| 243 | } |
| 244 | |
| 245 | /// `repo`, if there is one and the viewer may read it. |
| 246 | async fn visible(&self, repo: Option<Repo>, viewer: &Viewer) -> Result<Option<Repo>> { |
| 247 | Ok(match repo { |
| 248 | Some(repo) if self.may_read(&repo, viewer).await? => Some(repo), |
| 249 | _ => None, |
| 250 | }) |
| 251 | } |
| 252 | |
| 253 | /// Resolves a repo the viewer may read; private repos look missing. |
| 254 | pub(crate) async fn readable(&self, path: &RepoPath, viewer: &Viewer) -> Result<Option<Repo>> { |
| 255 | self.visible(self.registry.by_path(path).await?, viewer) |
| 256 | .await |
| 257 | } |
| 258 | |
| 259 | async fn get(&self, a: GetArgs) -> Result<Outcome<Repo>> { |
| 260 | Ok(self |
| 261 | .readable(&a.path, &a.viewer) |
| 262 | .await? |
| 263 | .map_or_else(not_found, Outcome::Ok)) |
| 264 | } |
| 265 | |
| 266 | async fn get_by_id(&self, a: GetByIdArgs) -> Result<Outcome<Repo>> { |
| 267 | Ok(self |
| 268 | .visible(self.registry.by_id(&a.id).await?, &a.viewer) |
| 269 | .await? |
| 270 | .map_or_else(not_found, Outcome::Ok)) |
| 271 | } |
| 272 | |
| 273 | async fn update(&self, a: UpdateArgs) -> Result<Outcome<Repo>> { |
| 274 | let viewer = Some(a.actor.clone()); |
| 275 | let Some(repo) = self.readable(&a.path, &viewer).await? else { |
| 276 | return Ok(not_found()); |
| 277 | }; |
| 278 | // Its details take Maintain; its protection, Maintain too; who can |
| 279 | // see it, Admin (below). See g1t_contracts::access. |
| 280 | let protection_changes = a.protected.is_some_and(|protected| protected != repo.protected); |
| 281 | let details_change = a.description.is_some() || a.website.is_some() || a.topics.is_some(); |
| 282 | let mut needed = Vec::new(); |
| 283 | if details_change || !protection_changes { |
| 284 | needed.push(Capability::ManageSettings); |
| 285 | } |
| 286 | if protection_changes { |
| 287 | needed.push(Capability::ManageProtection); |
| 288 | } |
| 289 | let full_name = format!("{}/{}", repo.namespace, repo.name); |
| 290 | if repo.fork_of.is_some() { |
| 291 | return Ok(Outcome::fail(FailureCode::Forbidden, access::needs(Capability::ManageSettings, &full_name))); |
| 292 | } |
| 293 | if let Some(missing) = needed.into_iter().find(|capability| !registry::can(&repo, &viewer, *capability)) { |
| 294 | return Ok(Outcome::fail(FailureCode::Forbidden, access::needs(missing, &full_name))); |
| 295 | } |
| 296 | if !a.actor.verified { |
| 297 | return Ok(Outcome::fail(FailureCode::Forbidden, UNVERIFIED)); |
| 298 | } |
| 299 | if let Some((code, message)) = lifecycle::archived_refusal(&repo) { |
| 300 | return Ok(Outcome::fail(code, message)); |
| 301 | } |
| 302 | let description = match a.description { |
| 303 | Some(text) => Some( |
| 304 | text.trim() |
| 305 | .chars() |
| 306 | .take(MAX_DESCRIPTION_CHARS) |
| 307 | .collect::<String>(), |
| 308 | ) |
| 309 | .filter(|text| !text.is_empty()), |
| 310 | None => repo.description.clone(), |
| 311 | }; |
| 312 | let website = match a.website.as_deref() { |
| 313 | Some(text) => match clean_website(text) { |
| 314 | Ok(website) => website, |
| 315 | Err(reason) => return Ok(Outcome::fail(FailureCode::Invalid, reason)), |
| 316 | }, |
| 317 | None => repo.website.clone(), |
| 318 | }; |
| 319 | // Who can see it is an owner's to change, and a free workspace's |
| 320 | // storage may not take it private: see lifecycle.rs. |
| 321 | let wants_private = a.is_private.filter(|private| *private != repo.is_private); |
| 322 | if wants_private.is_some() |
| 323 | && let Err((code, message)) = lifecycle::admin_only( |
| 324 | lifecycle::Asker::on(&a.actor, &repo), |
| 325 | &repo.namespace, |
| 326 | "change the visibility of", |
| 327 | Capability::Administer, |
| 328 | ) |
| 329 | { |
| 330 | return Ok(Outcome::fail(code, message)); |
| 331 | } |
| 332 | let is_private = repo.is_private; |
| 333 | let protected = a.protected.unwrap_or(repo.protected); |
| 334 | let topics = match &a.topics { |
| 335 | Some(topics) => match clean_topics(topics) { |
| 336 | Ok(topics) => topics, |
| 337 | Err(reason) => return Ok(Outcome::fail(FailureCode::Invalid, reason)), |
| 338 | }, |
| 339 | None => repo.topics.clone(), |
| 340 | }; |
| 341 | self.registry |
| 342 | .update(&repo.id, description.as_deref(), protected, &topics, website.as_deref()) |
| 343 | .await?; |
| 344 | let updated = Repo { |
| 345 | description, |
| 346 | is_private, |
| 347 | protected, |
| 348 | topics, |
| 349 | website, |
| 350 | ..repo |
| 351 | }; |
| 352 | if let Some(private) = wants_private { |
| 353 | return self.change_visibility(updated, private, &a.actor, a.surface).await; |
| 354 | } |
| 355 | let visibility_changed = false; |
| 356 | // Search and anything else that shows the repository hears of it; |
| 357 | // a change of visibility is announced on its own as well, so that |
| 358 | // what was public stops being shown at once. |
| 359 | self.publish(NewEvent { |
| 360 | kind: "repo.updated", |
| 361 | source: SOURCE, |
| 362 | repo_id: Some(updated.id.clone()), |
| 363 | actor: Some(a.actor.id.clone()), |
| 364 | data: RepoUpdated { |
| 365 | repo_id: updated.id.clone(), |
| 366 | namespace: updated.namespace.clone(), |
| 367 | name: updated.name.clone(), |
| 368 | is_private, |
| 369 | visibility_changed, |
| 370 | }, |
| 371 | }) |
| 372 | .await?; |
| 373 | Ok(Outcome::Ok(updated)) |
| 374 | } |
| 375 | |
| 376 | /// The repository with this id, if it is not a fork, and its store. |
| 377 | async fn stored(&self, repo_id: &str) -> Result<Option<S::Repo>> { |
| 378 | match self.registry.by_id(repo_id).await? { |
| 379 | Some(repo) if repo.fork_of.is_none() => Ok(Some(self.store.open(&store_key(&repo)).await?)), |
| 380 | _ => Ok(None), |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | async fn list_files(&self, a: ListFilesArgs) -> Result<FileList> { |
| 385 | let Some(repo) = self.registry.by_id(&a.repo_id).await?.filter(|repo| repo.fork_of.is_none()) else { |
| 386 | return Ok(FileList::default()); |
| 387 | }; |
| 388 | let git = self.store.open(&store_key(&repo)).await?; |
| 389 | let head = a.git_ref.unwrap_or_else(|| repo.default_branch.clone()); |
| 390 | listing::list(&git, None, &head, &a.skip_dirs, a.limit).await |
| 391 | } |
| 392 | |
| 393 | async fn changed_files(&self, a: ChangedFilesArgs) -> Result<FileList> { |
| 394 | let Some(git) = self.stored(&a.repo_id).await? else { |
| 395 | return Ok(FileList::default()); |
| 396 | }; |
| 397 | listing::list(&git, a.base.as_deref(), &a.head, &a.skip_dirs, a.limit).await |
| 398 | } |
| 399 | |
| 400 | /// Branches and tags with their commits, for g1t's own services. |
| 401 | async fn refs_of(&self, a: RefsArgs) -> Result<Option<RepoRefs>> { |
| 402 | let Some(repo) = self.registry.by_id(&a.repo_id).await?.filter(|repo| repo.fork_of.is_none()) else { |
| 403 | return Ok(None); |
| 404 | }; |
| 405 | let git = self.store.open(&store_key(&repo)).await?; |
| 406 | let access = git.access(Scope::Read).await?; |
| 407 | let refs = refs::heads_and_tags(refs::all(&access).await?) |
| 408 | .into_iter() |
| 409 | .map(|(name, commit)| GitRefEntry { name, commit }) |
| 410 | .collect(); |
| 411 | Ok(Some(RepoRefs { repo, refs })) |
| 412 | } |
| 413 | |
| 414 | async fn raw_file(&self, a: RawFileArgs) -> Result<Option<RawFile>> { |
| 415 | use base64::Engine; |
| 416 | let Some(git) = self.stored(&a.repo_id).await? else { |
| 417 | return Ok(None); |
| 418 | }; |
| 419 | Ok(git |
| 420 | .read_file(&a.git_ref, &a.path) |
| 421 | .await? |
| 422 | .filter(|bytes| bytes.len() <= a.max_bytes as usize) |
| 423 | .map(|bytes| RawFile { size: bytes.len() as u64, data: base64::engine::general_purpose::STANDARD.encode(bytes) })) |
| 424 | } |
| 425 | |
| 426 | async fn raw_blobs(&self, a: RawBlobsArgs) -> Result<Vec<RawBlob>> { |
| 427 | use base64::Engine; |
| 428 | let Some(git) = self.stored(&a.repo_id).await? else { |
| 429 | return Ok(Vec::new()); |
| 430 | }; |
| 431 | let hashes: Vec<&String> = a.hashes.iter().take(MAX_READ_BLOBS).collect(); |
| 432 | let mut out = Vec::with_capacity(hashes.len()); |
| 433 | // A few at a time, as listing::read does: each is a round trip. |
| 434 | for group in hashes.chunks(8) { |
| 435 | let read = futures_util::future::try_join_all(group.iter().map(|hash| git.read_blob(hash))).await?; |
| 436 | for (hash, bytes) in group.iter().zip(read) { |
| 437 | let size = bytes.as_ref().map_or(0, |bytes| bytes.len() as u64); |
| 438 | let data = bytes |
| 439 | .filter(|bytes| bytes.len() <= a.max_bytes as usize) |
| 440 | .map(|bytes| base64::engine::general_purpose::STANDARD.encode(bytes)); |
| 441 | out.push(RawBlob { hash: (*hash).clone(), size, data }); |
| 442 | } |
| 443 | } |
| 444 | Ok(out) |
| 445 | } |
| 446 | |
| 447 | async fn read_blobs(&self, a: ReadBlobsArgs) -> Result<Vec<BlobText>> { |
| 448 | let Some(git) = self.stored(&a.repo_id).await? else { |
| 449 | return Ok(Vec::new()); |
| 450 | }; |
| 451 | listing::read(&git, &a.hashes, a.max_bytes.min(MAX_TEXT_BYTES as u32)).await |
| 452 | } |
| 453 | |
| 454 | async fn create(&self, a: CreateArgs) -> Result<Outcome<Repo>> { |
| 455 | if !a.owner.verified { |
| 456 | return Ok(Outcome::fail(FailureCode::Forbidden, UNVERIFIED)); |
| 457 | } |
| 458 | let name = a.name.trim().to_lowercase(); |
| 459 | if !is_valid_repo_name(&name) { |
| 460 | return Ok(Outcome::fail( |
| 461 | FailureCode::Invalid, |
| 462 | "Use letters, digits, dots, hyphens and underscores only.", |
| 463 | )); |
| 464 | } |
| 465 | let namespace = a.namespace.trim().to_lowercase(); |
| 466 | if namespace.is_empty() { |
| 467 | return Ok(Outcome::fail( |
| 468 | FailureCode::Invalid, |
| 469 | "Say which workspace to create the repository in.", |
| 470 | )); |
| 471 | } |
| 472 | if !a.owner.is_member(&namespace) { |
| 473 | return Ok(Outcome::fail( |
| 474 | FailureCode::Forbidden, |
| 475 | "You are not a member of that workspace.", |
| 476 | )); |
| 477 | } |
| 478 | let path = RepoPath { namespace, name }; |
| 479 | match self.registry.by_path_any(&path).await? { |
| 480 | Some((_, None)) => { |
| 481 | return Ok(Outcome::fail( |
| 482 | FailureCode::Conflict, |
| 483 | "That workspace already has a repository with that name.", |
| 484 | )); |
| 485 | } |
| 486 | Some((_, Some(_))) => { |
| 487 | return Ok(Outcome::fail( |
| 488 | FailureCode::Conflict, |
| 489 | format!( |
| 490 | "{}/{} was deleted recently and can still be restored, so its name is taken. Restore it, or delete it permanently from the workspace's Recently deleted list.", |
| 491 | path.namespace, path.name |
| 492 | ), |
| 493 | )); |
| 494 | } |
| 495 | None => {} |
| 496 | } |
| 497 | // With a credential (a GitHub App installation's token), everything |
| 498 | // is copied: every branch and tag. See mirror.rs. |
| 499 | let mut credentialed = None; |
| 500 | if let (Some(url), Some(token)) = (a.import_url.as_deref(), a.import_token.as_deref()) { |
| 501 | let Some(url) = import::clean_url(url) else { |
| 502 | return Ok(Outcome::fail(FailureCode::Invalid, "That is not an https repository address.")); |
| 503 | }; |
| 504 | let source = mirror::Endpoint::github(&url, token); |
| 505 | match mirror::probe(&source).await? { |
| 506 | Ok(advertised) => credentialed = Some((source, advertised)), |
| 507 | Err(reason) => return Ok(Outcome::fail(FailureCode::Invalid, reason)), |
| 508 | } |
| 509 | } |
| 510 | // An import is fetched before anything is created, so that an |
| 511 | // address that does not work leaves nothing behind. |
| 512 | let mut imported = None; |
| 513 | if let Some(url) = a |
| 514 | .import_url |
| 515 | .as_deref() |
| 516 | .map(str::trim) |
| 517 | .filter(|url| !url.is_empty() && credentialed.is_none()) |
| 518 | { |
| 519 | let Some(url) = import::clean_url(url) else { |
| 520 | return Ok(Outcome::fail( |
| 521 | FailureCode::Invalid, |
| 522 | "Give the https address of a public repository, such as https://github.com/owner/repo.", |
| 523 | )); |
| 524 | }; |
| 525 | let remote = match import::discover(&url).await? { |
| 526 | Ok(remote) => remote, |
| 527 | Err(reason) => return Ok(Outcome::fail(FailureCode::Invalid, reason)), |
| 528 | }; |
| 529 | imported = Some((remote, url)); |
| 530 | } |
| 531 | let now = now_ms(); |
| 532 | let repo = Repo { |
| 533 | id: new_id("rep", now), |
| 534 | namespace: path.namespace, |
| 535 | name: path.name, |
| 536 | description: a |
| 537 | .description |
| 538 | .map(|text| text.trim().to_owned()) |
| 539 | .filter(|text| !text.is_empty()), |
| 540 | is_private: a.is_private, |
| 541 | owner_id: a.owner.id.clone(), |
| 542 | default_branch: imported |
| 543 | .as_ref() |
| 544 | .map(|(remote, _)| remote.branch.clone()) |
| 545 | .or_else(|| credentialed.as_ref().and_then(|(_, advertised)| advertised.default_branch())) |
| 546 | .unwrap_or_else(|| "main".to_owned()), |
| 547 | fork_of: None, |
| 548 | protected: false, |
| 549 | created_at: rfc3339(now), |
| 550 | topics: Vec::new(), |
| 551 | website: None, |
| 552 | archived_at: None, |
| 553 | }; |
| 554 | let namespace = self.placement.place(&repo.id, shards::Residency::Anywhere, &self.store.namespaces()); |
| 555 | self.registry |
| 556 | .claim_store_key(&repo, namespace.as_deref(), &self.store.default_namespace()) |
| 557 | .await?; |
| 558 | self.store |
| 559 | .create( |
| 560 | &store_key(&repo), |
| 561 | repo.description.as_deref(), |
| 562 | &repo.default_branch, |
| 563 | ) |
| 564 | .await?; |
| 565 | self.registry.insert(&repo).await?; |
| 566 | // A repository that was transferred away from this path stops |
| 567 | // redirecting here. |
| 568 | self.registry |
| 569 | .drop_redirect(&RepoPath { |
| 570 | namespace: repo.namespace.clone(), |
| 571 | name: repo.name.clone(), |
| 572 | }) |
| 573 | .await?; |
| 574 | // Every branch and tag the import made, announced as pushes. |
| 575 | let mut pushed: Vec<(String, String)> = Vec::new(); |
| 576 | // A public repository, read with no credential: every branch and |
| 577 | // tag is copied too, the default branch the one its HEAD names. |
| 578 | if let Some((_, url)) = imported { |
| 579 | let access = self |
| 580 | .store |
| 581 | .open(&store_key(&repo)) |
| 582 | .await? |
| 583 | .access(Scope::Write) |
| 584 | .await?; |
| 585 | let target = mirror::Endpoint::bearer(&access.remote, &access.token); |
| 586 | let copied = mirror::copy(&mirror::Endpoint::anonymous(&url), &target, mirror::Prune::Yes).await?; |
| 587 | self.refs_moved(&repo.id).await; |
| 588 | match copied { |
| 589 | Ok(copied) => pushed = mirror::import_pushes(&copied.updated, &repo.default_branch), |
| 590 | Err(reason) => { |
| 591 | self.registry.remove(&repo.id).await?; |
| 592 | return Ok(Outcome::fail( |
| 593 | FailureCode::Invalid, |
| 594 | format!("The repository could not be stored: {reason}"), |
| 595 | )); |
| 596 | } |
| 597 | } |
| 598 | } |
| 599 | if let Some((source, _)) = credentialed { |
| 600 | let access = self |
| 601 | .store |
| 602 | .open(&store_key(&repo)) |
| 603 | .await? |
| 604 | .access(Scope::Write) |
| 605 | .await?; |
| 606 | let target = mirror::Endpoint::bearer(&access.remote, &access.token); |
| 607 | let copied = mirror::copy(&source, &target, mirror::Prune::Yes).await?; |
| 608 | self.refs_moved(&repo.id).await; |
| 609 | match copied { |
| 610 | Ok(copied) => pushed = mirror::import_pushes(&copied.updated, &repo.default_branch), |
| 611 | Err(reason) => { |
| 612 | self.registry.remove(&repo.id).await?; |
| 613 | return Ok(Outcome::fail( |
| 614 | FailureCode::Invalid, |
| 615 | format!("The repository could not be copied: {reason}"), |
| 616 | )); |
| 617 | } |
| 618 | } |
| 619 | } |
| 620 | self.publish(NewEvent { |
| 621 | kind: "repo.created", |
| 622 | source: SOURCE, |
| 623 | repo_id: Some(repo.id.clone()), |
| 624 | actor: Some(a.owner.id), |
| 625 | data: RepoCreated { |
| 626 | repo_id: repo.id.clone(), |
| 627 | namespace: repo.namespace.clone(), |
| 628 | name: repo.name.clone(), |
| 629 | is_private: repo.is_private, |
| 630 | }, |
| 631 | }) |
| 632 | .await?; |
| 633 | for (git_ref, head) in &pushed { |
| 634 | self.publish_push(&repo, git_ref, None, head, None).await?; |
| 635 | } |
| 636 | Ok(Outcome::Ok(repo)) |
| 637 | } |
| 638 | |
| 639 | async fn tree(&self, a: TreeArgs) -> Result<Outcome<TreeView>> { |
| 640 | let Some(repo) = self.readable(&a.path, &a.viewer).await? else { |
| 641 | return Ok(not_found()); |
| 642 | }; |
| 643 | let git = self.read_git(&repo).await?; |
| 644 | let git_ref = a |
| 645 | .git_ref |
| 646 | .clone() |
| 647 | .unwrap_or_else(|| repo.default_branch.clone()); |
| 648 | |
| 649 | let Some(head) = git.log(&git_ref, 1).await?.into_iter().next() else { |
| 650 | // An unknown ref is an error; a repo with no commits is just empty. |
| 651 | if a.git_ref.is_some() { |
| 652 | return Ok(Outcome::fail( |
| 653 | FailureCode::NotFound, |
| 654 | "No such branch, tag or commit.", |
| 655 | )); |
| 656 | } |
| 657 | return Ok(Outcome::Ok(TreeView { |
| 658 | repo, |
| 659 | git_ref, |
| 660 | path: a.tree_path, |
| 661 | head: None, |
| 662 | entries: Vec::new(), |
| 663 | readme: None, |
| 664 | })); |
| 665 | }; |
| 666 | |
| 667 | let no_directory = || Outcome::fail(FailureCode::NotFound, "No such directory."); |
| 668 | let mut entries = git.read_tree(&head.tree_hash).await?; |
| 669 | for segment in a.tree_path.split('/').filter(|segment| !segment.is_empty()) { |
| 670 | let next = entries.as_ref().and_then(|entries| { |
| 671 | entries |
| 672 | .iter() |
| 673 | .find(|entry| entry.name == segment && entry.kind == EntryKind::Tree) |
| 674 | }); |
| 675 | let Some(next) = next else { |
| 676 | return Ok(no_directory()); |
| 677 | }; |
| 678 | entries = git.read_tree(&next.hash).await?; |
| 679 | } |
| 680 | let Some(mut entries) = entries else { |
| 681 | return Ok(no_directory()); |
| 682 | }; |
| 683 | // Directories first, then by name. |
| 684 | entries.sort_by(|a, b| { |
| 685 | (b.kind == EntryKind::Tree) |
| 686 | .cmp(&(a.kind == EntryKind::Tree)) |
| 687 | .then_with(|| a.name.cmp(&b.name)) |
| 688 | }); |
| 689 | |
| 690 | let readme_entry = entries |
| 691 | .iter() |
| 692 | .find(|entry| entry.kind == EntryKind::Blob && is_readme(&entry.name)); |
| 693 | let readme = match readme_entry { |
| 694 | Some(entry) => git.read_blob(&entry.hash).await?.map(|bytes| Readme { |
| 695 | name: entry.name.clone(), |
| 696 | text: text_of(bytes), |
| 697 | }), |
| 698 | None => None, |
| 699 | }; |
| 700 | Ok(Outcome::Ok(TreeView { |
| 701 | repo, |
| 702 | git_ref, |
| 703 | path: a.tree_path, |
| 704 | head: Some(head), |
| 705 | entries, |
| 706 | readme, |
| 707 | })) |
| 708 | } |
| 709 | |
| 710 | async fn blob(&self, a: BlobArgs) -> Result<Outcome<BlobView>> { |
| 711 | let Some(repo) = self.readable(&a.path, &a.viewer).await? else { |
| 712 | return Ok(not_found()); |
| 713 | }; |
| 714 | let bytes = if a.file_path.is_empty() { |
| 715 | None |
| 716 | } else { |
| 717 | let git = self.read_git(&repo).await?; |
| 718 | git.read_file(&a.git_ref, &a.file_path).await? |
| 719 | }; |
| 720 | let Some(bytes) = bytes else { |
| 721 | return Ok(Outcome::fail(FailureCode::NotFound, "No such file.")); |
| 722 | }; |
| 723 | Ok(Outcome::Ok(BlobView { |
| 724 | repo, |
| 725 | git_ref: a.git_ref, |
| 726 | path: a.file_path, |
| 727 | size: bytes.len() as u64, |
| 728 | text: text_of(bytes), |
| 729 | })) |
| 730 | } |
| 731 | |
| 732 | async fn blame(&self, a: BlameArgs) -> Result<Outcome<Blame>> { |
| 733 | let Some(repo) = self.readable(&a.path, &a.viewer).await? else { |
| 734 | return Ok(not_found()); |
| 735 | }; |
| 736 | let git = self.read_git(&repo).await?; |
| 737 | let git_ref = a.git_ref.unwrap_or_else(|| repo.default_branch.clone()); |
| 738 | Ok(match blame::blame(&git, &git_ref, &a.file_path).await? { |
| 739 | Some(blame) => Outcome::Ok(blame), |
| 740 | None => not_found(), |
| 741 | }) |
| 742 | } |
| 743 | |
| 744 | async fn log(&self, a: LogArgs) -> Result<Outcome<Vec<Commit>>> { |
| 745 | let Some(repo) = self.readable(&a.path, &a.viewer).await? else { |
| 746 | return Ok(not_found()); |
| 747 | }; |
| 748 | let git = self.read_git(&repo).await?; |
| 749 | let git_ref = a.git_ref.unwrap_or_else(|| repo.default_branch.clone()); |
| 750 | Ok(Outcome::Ok(git.log(&git_ref, a.limit).await?)) |
| 751 | } |
| 752 | |
| 753 | /// Which commit last changed each entry of a directory. Kept in this |
| 754 | /// colo's cache by repository, head commit and path: a commit's history |
| 755 | /// never changes, so an answer is good for as long as it is kept. |
| 756 | async fn last_commits(&self, a: g1t_contracts::repos::LastCommitsArgs) -> Result<Outcome<g1t_contracts::repos::LastCommits>> { |
| 757 | let Some(repo) = self.readable(&a.path, &a.viewer).await? else { |
| 758 | return Ok(not_found()); |
| 759 | }; |
| 760 | let git = self.read_git(&repo).await?; |
| 761 | let git_ref = a.git_ref.unwrap_or_else(|| repo.default_branch.clone()); |
| 762 | let Some(head) = git.log(&git_ref, 1).await?.into_iter().next() else { |
| 763 | return Ok(Outcome::fail(FailureCode::NotFound, "No such branch, tag or commit.")); |
| 764 | }; |
| 765 | let key = format!( |
| 766 | "https://last-commits.g1t.internal/{}/{}/{}", |
| 767 | repo.id, |
| 768 | head.hash, |
| 769 | a.tree_path.split('/').map(urlencoding_segment).collect::<Vec<_>>().join("/") |
| 770 | ); |
| 771 | let cache = worker::Cache::default(); |
| 772 | if let Ok(Some(mut kept)) = cache.get(key.as_str(), false).await { |
| 773 | if let Ok(found) = kept.json::<g1t_contracts::repos::LastCommits>().await { |
| 774 | return Ok(Outcome::Ok(found)); |
| 775 | } |
| 776 | } |
| 777 | // Asked with a budget: past it, what was found so far, not kept. |
| 778 | let started = worker::Date::now().as_millis(); |
| 779 | let budget = a.budget_ms; |
| 780 | let out_of_time = move || budget.is_some_and(|budget| worker::Date::now().as_millis().saturating_sub(started) > budget); |
| 781 | let (entries, complete) = last_commits::last_commits(&git, &head.hash, &a.tree_path, &out_of_time).await?; |
| 782 | let stopped = out_of_time(); |
| 783 | let found = g1t_contracts::repos::LastCommits { entries, complete }; |
| 784 | if stopped && !found.complete { |
| 785 | return Ok(Outcome::Ok(found)); |
| 786 | } |
| 787 | if let Ok(mut response) = worker::Response::from_json(&found) { |
| 788 | let _ = response.headers_mut().set("cache-control", "max-age=604800"); |
| 789 | let _ = cache.put(key.as_str(), response).await; |
| 790 | } |
| 791 | Ok(Outcome::Ok(found)) |
| 792 | } |
| 793 | |
| 794 | /// The repository's tags, newest commit first, at most 100. |
| 795 | async fn tags(&self, a: g1t_contracts::repos::TagsArgs) -> Result<Outcome<Vec<g1t_contracts::repos::Tag>>> { |
| 796 | let Some(repo) = self.readable(&a.path, &a.viewer).await? else { |
| 797 | return Ok(not_found()); |
| 798 | }; |
| 799 | let git = self.store.open(&store_key(&repo)).await?; |
| 800 | let access = git.access(Scope::Read).await?; |
| 801 | let named: Vec<(String, String)> = refs::heads_and_tags(refs::all(&access).await?) |
| 802 | .into_iter() |
| 803 | .filter_map(|(name, hash)| name.strip_prefix("refs/tags/").map(|tag| (tag.to_owned(), hash))) |
| 804 | .collect(); |
| 805 | let read = self.read_git(&repo).await?; |
| 806 | let commits = futures_util::future::join_all(named.iter().take(MAX_TAGS_READ).map(|(_, hash)| read.log(hash, 1))).await; |
| 807 | let mut tags: Vec<g1t_contracts::repos::Tag> = named |
| 808 | .into_iter() |
| 809 | .zip(commits.into_iter().map(|found| found.ok().and_then(|list| list.into_iter().next())).chain(std::iter::repeat(None))) |
| 810 | .map(|((name, _), commit)| g1t_contracts::repos::Tag { name, commit }) |
| 811 | .collect(); |
| 812 | tags.sort_by(|a, b| { |
| 813 | let at = |tag: &g1t_contracts::repos::Tag| tag.commit.as_ref().map(|c| c.authored_at.clone()).unwrap_or_default(); |
| 814 | at(b).cmp(&at(a)).then_with(|| b.name.cmp(&a.name)) |
| 815 | }); |
| 816 | tags.truncate(MAX_TAGS_READ); |
| 817 | Ok(Outcome::Ok(tags)) |
| 818 | } |
| 819 | |
| 820 | /// The repository's branches, default branch first. |
| 821 | async fn branches(&self, a: BranchesArgs) -> Result<Outcome<Vec<Branch>>> { |
| 822 | let Some(repo) = self.readable(&a.path, &a.viewer).await? else { |
| 823 | return Ok(not_found()); |
| 824 | }; |
| 825 | let mut branches = self.read_git(&repo).await?.branches().await?; |
| 826 | branches.sort_by_key(|branch| branch.name != repo.default_branch); |
| 827 | Ok(Outcome::Ok(branches)) |
| 828 | } |
| 829 | |
| 830 | /// Whether a pull request's source lacks commits that the branch it |
| 831 | /// would merge into has. |
| 832 | async fn behind(&self, a: BehindArgs) -> Result<bool> { |
| 833 | let Some(source) = self.registry.by_id(&a.source_id).await? else { |
| 834 | return Ok(false); |
| 835 | }; |
| 836 | let target = match &source.fork_of { |
| 837 | Some(id) => self.registry.by_id(id).await?, |
| 838 | None => Some(source.clone()), |
| 839 | }; |
| 840 | let Some(target) = target else { |
| 841 | return Ok(false); |
| 842 | }; |
| 843 | let branch = a.branch.unwrap_or_else(|| target.default_branch.clone()); |
| 844 | let target_head = self |
| 845 | .read_git(&target) |
| 846 | .await? |
| 847 | .log(&target.default_branch, 1) |
| 848 | .await? |
| 849 | .into_iter() |
| 850 | .next() |
| 851 | .map(|commit| commit.hash); |
| 852 | let Some(target_head) = target_head else { |
| 853 | return Ok(false); |
| 854 | }; |
| 855 | let source_git = self.read_git(&source).await?; |
| 856 | let history = source_git.log(&branch, MAX_ANCESTRY).await?; |
| 857 | if history.is_empty() { |
| 858 | return Ok(false); |
| 859 | } |
| 860 | Ok(!descends_from(&source_git, &history, &target_head).await?) |
| 861 | } |
| 862 | |
| 863 | /// The files a pull request's source and the default branch it would |
| 864 | /// merge into each changed since they last agreed. Where the two lists |
| 865 | /// share no file, the merge cannot conflict; where they do, it may. |
| 866 | async fn divergence(&self, a: BehindArgs) -> Result<Option<Divergence>> { |
| 867 | let Some(source) = self.registry.by_id(&a.source_id).await? else { |
| 868 | return Ok(None); |
| 869 | }; |
| 870 | let target = match &source.fork_of { |
| 871 | Some(id) => self.registry.by_id(id).await?, |
| 872 | None => Some(source.clone()), |
| 873 | }; |
| 874 | let Some(target) = target else { |
| 875 | return Ok(None); |
| 876 | }; |
| 877 | let branch = a.branch.unwrap_or_else(|| target.default_branch.clone()); |
| 878 | let source_git = self.read_git(&source).await?; |
| 879 | let target_git = self.read_git(&target).await?; |
| 880 | // The target's side is the same for every pull request into it, and |
| 881 | // worked out once per head (coalesce.rs). |
| 882 | let (history, side) = futures_util::future::try_join( |
| 883 | source_git.log(&branch, MAX_ANCESTRY), |
| 884 | self.target_side(&target, &target_git), |
| 885 | ) |
| 886 | .await?; |
| 887 | let target_history = &side.history; |
| 888 | let (Some(head), Some(base)) = (history.first(), target_history.first()) else { |
| 889 | return Ok(None); |
| 890 | }; |
| 891 | let behind = !descends_from(&source_git, &history, &base.hash).await?; |
| 892 | let merge_base = nearest_ancestor_in(&source_git, &history, &side.shared).await?; |
| 893 | let mut divergence = Divergence { |
| 894 | head: head.hash.clone(), |
| 895 | base: base.hash.clone(), |
| 896 | merge_base: merge_base.clone(), |
| 897 | behind, |
| 898 | ..Divergence::default() |
| 899 | }; |
| 900 | let merge_base_tree = match &merge_base { |
| 901 | Some(hash) => target_history |
| 902 | .iter() |
| 903 | .find(|commit| commit.hash == *hash) |
| 904 | .map(|commit| commit.tree_hash.clone()), |
| 905 | None => None, |
| 906 | }; |
| 907 | let Some(merge_base_tree) = merge_base_tree else { |
| 908 | // No common history to compare from: say nothing is known. |
| 909 | divergence.truncated = true; |
| 910 | return Ok(Some(divergence)); |
| 911 | }; |
| 912 | let (ours, truncated_ours) = |
| 913 | diff::changed_paths(&source_git, Some(&merge_base_tree), &head.tree_hash).await?; |
| 914 | divergence.ours = ours; |
| 915 | divergence.truncated = truncated_ours; |
| 916 | if behind { |
| 917 | let now = now_ms(); |
| 918 | let key = (target.id.clone(), merge_base_tree.clone(), base.tree_hash.clone()); |
| 919 | let (theirs, truncated_theirs) = match THEIRS.with(|memo| memo.borrow().get(&key, now)) { |
| 920 | Some(kept) => kept, |
| 921 | None => { |
| 922 | let found = diff::changed_paths(&target_git, Some(&merge_base_tree), &base.tree_hash).await?; |
| 923 | THEIRS.with(|memo| memo.borrow_mut().put(key, found.clone(), now)); |
| 924 | found |
| 925 | } |
| 926 | }; |
| 927 | divergence.theirs = theirs; |
| 928 | divergence.truncated |= truncated_theirs; |
| 929 | } |
| 930 | Ok(Some(divergence)) |
| 931 | } |
| 932 | |
| 933 | /// A target branch's history from its head, worked out once per head |
| 934 | /// for every pull request asking about it (coalesce.rs). The head is |
| 935 | /// read under the refs version; the history by its hash, which the |
| 936 | /// object cache keeps for good. |
| 937 | async fn target_side<R: GitRepo>(&self, target: &Repo, git: &R) -> Result<Rc<coalesce::TargetSide>> { |
| 938 | let now = now_ms(); |
| 939 | let key = refs_cache::usable(registry::refs_state(&target.id), now) |
| 940 | .map(|version| (target.id.clone(), target.default_branch.clone(), version)); |
| 941 | if let Some(key) = &key |
| 942 | && let Some(side) = TARGETS.with(|memo| memo.borrow().get(key, now)) |
| 943 | { |
| 944 | return Ok(side); |
| 945 | } |
| 946 | let history = match git.log(&target.default_branch, 1).await?.first() { |
| 947 | Some(head) => git.log(&head.hash, MAX_ANCESTRY).await?, |
| 948 | None => Vec::new(), |
| 949 | }; |
| 950 | let side = coalesce::TargetSide::new(history); |
| 951 | if let Some(key) = key { |
| 952 | TARGETS.with(|memo| memo.borrow_mut().put(key, side.clone(), now)); |
| 953 | } |
| 954 | Ok(side) |
| 955 | } |
| 956 | |
| 957 | async fn head(&self, a: HeadArgs) -> Result<Option<String>> { |
| 958 | let Some(repo) = self.registry.by_id(&a.repo_id).await? else { |
| 959 | return Ok(None); |
| 960 | }; |
| 961 | let branch = if a.branch.is_empty() { &repo.default_branch } else { &a.branch }; |
| 962 | let git = self.read_git(&repo).await?; |
| 963 | Ok(git |
| 964 | .log(branch, 1) |
| 965 | .await? |
| 966 | .into_iter() |
| 967 | .next() |
| 968 | .map(|commit| commit.hash)) |
| 969 | } |
| 970 | |
| 971 | async fn delete_branch(&self, a: DeleteBranchArgs) -> Result<Outcome<bool>> { |
| 972 | if !a.branch.starts_with(G1T_BRANCH_PREFIX) { |
| 973 | return Ok(Outcome::fail( |
| 974 | FailureCode::Forbidden, |
| 975 | "Only branches g1t made for itself can be deleted this way.", |
| 976 | )); |
| 977 | } |
| 978 | let Some(repo) = self.registry.by_id(&a.repo_id).await? else { |
| 979 | return Ok(not_found()); |
| 980 | }; |
| 981 | self.live(&repo).await?; |
| 982 | let git = self.store.open(&store_key(&repo)).await?; |
| 983 | let Some(old) = git |
| 984 | .branches() |
| 985 | .await? |
| 986 | .into_iter() |
| 987 | .find(|branch| branch.name == a.branch) |
| 988 | .map(|branch| branch.hash) |
| 989 | else { |
| 990 | return Ok(Outcome::Ok(false)); |
| 991 | }; |
| 992 | let access = git.access(Scope::Write).await?; |
| 993 | let deleted = land::delete_ref(&access, &a.branch, &old).await?; |
| 994 | self.refs_moved(&repo.id).await; |
| 995 | if let Err(reason) = deleted { |
| 996 | return Ok(Outcome::fail( |
| 997 | FailureCode::Conflict, |
| 998 | format!("{} could not be deleted: {reason}", a.branch), |
| 999 | )); |
| 1000 | } |
| 1001 | Ok(Outcome::Ok(true)) |
| 1002 | } |
| 1003 | |
| 1004 | async fn fork_for_pull(&self, a: ForkArgs) -> Result<Outcome<Repo>> { |
| 1005 | let viewer = Some(a.actor.clone()); |
| 1006 | let Some(source) = self |
| 1007 | .registry |
| 1008 | .by_id(&a.source_id) |
| 1009 | .await? |
| 1010 | .filter(|repo| can_read(repo, &viewer)) |
| 1011 | else { |
| 1012 | return Ok(not_found()); |
| 1013 | }; |
| 1014 | if let Some((code, message)) = lifecycle::archived_refusal(&source) { |
| 1015 | return Ok(Outcome::fail(code, message)); |
| 1016 | } |
| 1017 | let now = now_ms(); |
| 1018 | let fork = Repo { |
| 1019 | id: new_id("rep", now), |
| 1020 | namespace: PULLS_NAMESPACE.to_owned(), |
| 1021 | name: a.pull_id.clone(), |
| 1022 | description: None, |
| 1023 | // A fork is exactly as visible as the repo it came from. |
| 1024 | is_private: source.is_private, |
| 1025 | owner_id: a.actor.id.clone(), |
| 1026 | default_branch: source.default_branch.clone(), |
| 1027 | fork_of: Some(source.id.clone()), |
| 1028 | protected: false, |
| 1029 | created_at: rfc3339(now), |
| 1030 | topics: Vec::new(), |
| 1031 | website: None, |
| 1032 | archived_at: None, |
| 1033 | }; |
| 1034 | // Artifacts forks within a namespace: the copy goes where its |
| 1035 | // repository is. |
| 1036 | let (namespace, _) = store::locate(&store_key(&source)); |
| 1037 | self.registry |
| 1038 | .claim_store_key(&fork, Some(&namespace), &self.store.default_namespace()) |
| 1039 | .await?; |
| 1040 | self.store |
| 1041 | .open(&store_key(&source)) |
| 1042 | .await? |
| 1043 | .fork(&store_key(&fork)) |
| 1044 | .await?; |
| 1045 | self.registry.insert(&fork).await?; |
| 1046 | self.publish(NewEvent { |
| 1047 | kind: "repo.forked", |
| 1048 | source: SOURCE, |
| 1049 | repo_id: Some(source.id.clone()), |
| 1050 | actor: Some(a.actor.id), |
| 1051 | data: RepoForked { |
| 1052 | repo_id: fork.id.clone(), |
| 1053 | source_repo_id: source.id, |
| 1054 | pull_id: a.pull_id, |
| 1055 | }, |
| 1056 | }) |
| 1057 | .await?; |
| 1058 | Ok(Outcome::Ok(fork)) |
| 1059 | } |
| 1060 | |
| 1061 | async fn git_access(&self, a: GitAccessArgs) -> Result<Outcome<GitAccess>> { |
| 1062 | let found = self.registry.by_path(&a.path).await?; |
| 1063 | Ok(match self.authorize_git(&a.path, &a.viewer, a.service, found).await? { |
| 1064 | Outcome::Ok(repo) => { |
| 1065 | self.live(&repo).await?; |
| 1066 | let write = a.service == GitService::ReceivePack; |
| 1067 | if write { |
| 1068 | // A push with this credential would not pass through |
| 1069 | // here, so nothing that lists the refs is kept until it |
| 1070 | // has expired (see refs_cache.rs). |
| 1071 | let until = now_ms() + store::CREDENTIAL_LIFE_MS + 60_000; |
| 1072 | if let Err(error) = self.registry.refs_open(&repo.id, until).await { |
| 1073 | // Before the column exists nothing is kept anyway. |
| 1074 | if registry::refs_state(&repo.id).is_some() { |
| 1075 | return Err(error); |
| 1076 | } |
| 1077 | } |
| 1078 | } |
| 1079 | let scope = if write { Scope::Write } else { Scope::Read }; |
| 1080 | Outcome::Ok(self.store.handout(&store_key(&repo), scope).await?) |
| 1081 | } |
| 1082 | Outcome::Fail(failure) => Outcome::Fail(failure), |
| 1083 | }) |
| 1084 | } |
| 1085 | |
| 1086 | /// The repository at `path` (`found`, as just read), if the viewer may |
| 1087 | /// use `service` on it: fetch from it, or push to it. A push to a path |
| 1088 | /// with nothing there makes the repository, in a workspace the pusher |
| 1089 | /// belongs to. |
| 1090 | async fn authorize_git( |
| 1091 | &self, |
| 1092 | path: &RepoPath, |
| 1093 | viewer: &Viewer, |
| 1094 | service: GitService, |
| 1095 | found: Option<Repo>, |
| 1096 | ) -> Result<Outcome<Repo>> { |
| 1097 | let mut a = GitAccessArgs { |
| 1098 | path: path.clone(), |
| 1099 | viewer: viewer.clone(), |
| 1100 | service, |
| 1101 | }; |
| 1102 | let write = a.service == GitService::ReceivePack; |
| 1103 | // An access token: pushing needs code:write, reading a private |
| 1104 | // repository code:read. A public repository reads as it would for |
| 1105 | // anyone. Which repositories a token reaches is its owner's, checked |
| 1106 | // below as for anyone. |
| 1107 | if let Some(access) = a.viewer.as_ref().and_then(|user| user.token.as_deref()).cloned() { |
| 1108 | let public = found.as_ref().is_some_and(|repo| !repo.is_private); |
| 1109 | let decision = g1t_contracts::scopes::decide_git(&access, write, public); |
| 1110 | if !decision.allowed { |
| 1111 | return Ok(Outcome::fail( |
| 1112 | FailureCode::Forbidden, |
| 1113 | format!("{}\n", decision.reason.unwrap_or_default()), |
| 1114 | )); |
| 1115 | } |
| 1116 | if !write && !access.allows(g1t_contracts::scopes::Scope::CodeRead) { |
| 1117 | a.viewer = None; |
| 1118 | } |
| 1119 | } |
| 1120 | |
| 1121 | // Anonymous callers are asked to authenticate whether or not the repo |
| 1122 | // exists, so private repos cannot be told apart from missing ones. |
| 1123 | let denied = || match &a.viewer { |
| 1124 | Some(_) => not_found(), |
| 1125 | None => Outcome::fail(FailureCode::Unauthenticated, "Authentication required."), |
| 1126 | }; |
| 1127 | // An agent's token works through the API only: its sandbox has its |
| 1128 | // own way to push, to its own pull request. |
| 1129 | if a.viewer.as_ref().is_some_and(|user| user.kind == PrincipalKind::Agent) { |
| 1130 | return Ok(Outcome::fail( |
| 1131 | FailureCode::Forbidden, |
| 1132 | "A g1t agent's token cannot be used with git.", |
| 1133 | )); |
| 1134 | } |
| 1135 | if let (true, Some(user)) = (write, &a.viewer) |
| 1136 | && !user.verified |
| 1137 | { |
| 1138 | return Ok(Outcome::fail(FailureCode::Forbidden, UNVERIFIED)); |
| 1139 | } |
| 1140 | let repo = match found { |
| 1141 | Some(repo) => { |
| 1142 | let allowed = if write { |
| 1143 | can_write(&repo, &a.viewer) |
| 1144 | } else { |
| 1145 | self.may_read(&repo, &a.viewer).await? |
| 1146 | }; |
| 1147 | if !allowed { |
| 1148 | return Ok(denied()); |
| 1149 | } |
| 1150 | // An archived repository, or a pull request's copy of one, |
| 1151 | // is read-only. |
| 1152 | if write { |
| 1153 | let archived = match &repo.fork_of { |
| 1154 | Some(source) => self.registry.by_id(source).await?, |
| 1155 | None => Some(repo.clone()), |
| 1156 | }; |
| 1157 | match archived { |
| 1158 | Some(source) => { |
| 1159 | if let Some((code, message)) = lifecycle::archived_refusal(&source) { |
| 1160 | return Ok(Outcome::fail(code, format!("{message}\n"))); |
| 1161 | } |
| 1162 | } |
| 1163 | // The repository it was copied from is deleted. |
| 1164 | None => return Ok(denied()), |
| 1165 | } |
| 1166 | } |
| 1167 | repo |
| 1168 | } |
| 1169 | None => { |
| 1170 | // Push to create, in a workspace the pusher belongs to. |
| 1171 | let owner = a |
| 1172 | .viewer |
| 1173 | .as_ref() |
| 1174 | .filter(|user| write && user.is_member(&a.path.namespace.to_lowercase())); |
| 1175 | let Some(owner) = owner else { |
| 1176 | return Ok(denied()); |
| 1177 | }; |
| 1178 | let created = self.create(push_to_create(owner, &a.path)).await?; |
| 1179 | match created { |
| 1180 | Outcome::Ok(repo) => repo, |
| 1181 | Outcome::Fail(failure) => return Ok(Outcome::Fail(failure)), |
| 1182 | } |
| 1183 | } |
| 1184 | }; |
| 1185 | Ok(Outcome::Ok(repo)) |
| 1186 | } |
| 1187 | |
| 1188 | async fn land(&self, a: LandArgs) -> Result<Outcome<Landed>> { |
| 1189 | let actor: Viewer = Some(a.actor.clone()); |
| 1190 | let Some(source) = self.registry.by_id(&a.source_id).await? else { |
| 1191 | return Ok(not_found()); |
| 1192 | }; |
| 1193 | // A fork lands on the repository it came from; a branch on its own. |
| 1194 | let target = match &source.fork_of { |
| 1195 | Some(id) => self.registry.by_id(id).await?, |
| 1196 | None => Some(source.clone()), |
| 1197 | }; |
| 1198 | let Some(target) = target.filter(|repo| can_read(repo, &actor)) else { |
| 1199 | return Ok(not_found()); |
| 1200 | }; |
| 1201 | if !registry::can(&target, &actor, Capability::Merge) { |
| 1202 | return Ok(Outcome::fail( |
| 1203 | FailureCode::Forbidden, |
| 1204 | access::needs(Capability::Merge, &format!("{}/{}", target.namespace, target.name)), |
| 1205 | )); |
| 1206 | } |
| 1207 | if !a.actor.verified { |
| 1208 | return Ok(Outcome::fail(FailureCode::Forbidden, UNVERIFIED)); |
| 1209 | } |
| 1210 | if let Some((code, message)) = lifecycle::archived_refusal(&target) { |
| 1211 | return Ok(Outcome::fail(code, message)); |
| 1212 | } |
| 1213 | |
| 1214 | let branch = &target.default_branch; |
| 1215 | let from_fork = source.id != target.id; |
| 1216 | let source_branch = match a.branch { |
| 1217 | Some(name) if !from_fork && name == *branch => { |
| 1218 | return Ok(Outcome::fail( |
| 1219 | FailureCode::Invalid, |
| 1220 | format!("{branch} cannot be merged into itself."), |
| 1221 | )); |
| 1222 | } |
| 1223 | Some(name) => name, |
| 1224 | None if from_fork => branch.clone(), |
| 1225 | None => { |
| 1226 | return Ok(Outcome::fail( |
| 1227 | FailureCode::Invalid, |
| 1228 | "Say which branch to merge.", |
| 1229 | )); |
| 1230 | } |
| 1231 | }; |
| 1232 | |
| 1233 | self.live(&source).await?; |
| 1234 | let source_git = self.store.open(&store_key(&source)).await?; |
| 1235 | let target_git = self.store.open(&store_key(&target)).await?; |
| 1236 | let history = source_git.log(&source_branch, MAX_ANCESTRY).await?; |
| 1237 | let Some(new) = history.first().map(|commit| commit.hash.clone()) else { |
| 1238 | return Ok(Outcome::fail( |
| 1239 | FailureCode::Conflict, |
| 1240 | "This pull request has no commits to merge.", |
| 1241 | )); |
| 1242 | }; |
| 1243 | let old = target_git |
| 1244 | .log(branch, 1) |
| 1245 | .await? |
| 1246 | .into_iter() |
| 1247 | .next() |
| 1248 | .map(|commit| commit.hash); |
| 1249 | |
| 1250 | if old.as_deref() == Some(new.as_str()) { |
| 1251 | return Ok(Outcome::Ok(Landed { |
| 1252 | commit: new, |
| 1253 | previous: None, |
| 1254 | })); |
| 1255 | } |
| 1256 | // Moving the branch to a commit that does not descend from its |
| 1257 | // current head would discard whatever landed in between. |
| 1258 | if let Some(old) = &old |
| 1259 | && !descends_from(&source_git, &history, old).await? |
| 1260 | { |
| 1261 | let remedy = if from_fork { |
| 1262 | format!("Pull {branch} into the pull request's fork, push, and merge again.") |
| 1263 | } else { |
| 1264 | format!("Merge {branch} into {source_branch}, push, and merge again.") |
| 1265 | }; |
| 1266 | return Ok(Outcome::fail( |
| 1267 | FailureCode::Conflict, |
| 1268 | format!("{branch} has moved since this pull request was opened. {remedy}"), |
| 1269 | )); |
| 1270 | } |
| 1271 | |
| 1272 | // For a branch the objects are already in the target; sending them |
| 1273 | // again is harmless and keeps one way of moving a ref. |
| 1274 | let source_access = source_git.access(Scope::Read).await?; |
| 1275 | let target_access = target_git.access(Scope::Write).await?; |
| 1276 | let pushed = |
| 1277 | land::fast_forward(&source_access, &target_access, branch, old.as_deref(), &new) |
| 1278 | .await?; |
| 1279 | self.refs_moved(&target.id).await; |
| 1280 | if let Err(reason) = pushed { |
| 1281 | // Most often another pull request landed between the check and the push. |
| 1282 | return Ok(Outcome::fail( |
| 1283 | FailureCode::Conflict, |
| 1284 | format!("{branch} could not be updated: {reason}"), |
| 1285 | )); |
| 1286 | } |
| 1287 | self.publish_push( |
| 1288 | &target, |
| 1289 | &format!("refs/heads/{branch}"), |
| 1290 | old.as_deref(), |
| 1291 | &new, |
| 1292 | Some(a.actor.id), |
| 1293 | ) |
| 1294 | .await?; |
| 1295 | Ok(Outcome::Ok(Landed { |
| 1296 | commit: new, |
| 1297 | previous: old, |
| 1298 | })) |
| 1299 | } |
| 1300 | |
| 1301 | async fn compare(&self, a: CompareArgs) -> Result<Outcome<Comparison>> { |
| 1302 | let Some(repo) = self |
| 1303 | .visible(self.registry.by_id(&a.repo_id).await?, &a.viewer) |
| 1304 | .await? |
| 1305 | else { |
| 1306 | return Ok(not_found()); |
| 1307 | }; |
| 1308 | let git = self.read_git(&repo).await?; |
| 1309 | let head_ref = a.head.as_deref().unwrap_or(&repo.default_branch); |
| 1310 | // The head's history is only searched when the base is worked out |
| 1311 | // from another branch. |
| 1312 | let depth = if a.base.is_some() || is_commit_hash(head_ref) { 1 } else { MAX_ANCESTRY }; |
| 1313 | let history = git.log(head_ref, depth).await?; |
| 1314 | let Some(head) = history.first() else { |
| 1315 | return Ok(Outcome::fail( |
| 1316 | FailureCode::Conflict, |
| 1317 | "There are no commits to compare.", |
| 1318 | )); |
| 1319 | }; |
| 1320 | |
| 1321 | // Where the head's history meets the default branch of `against`. |
| 1322 | let shared_with = async |against: &Repo| -> Result<Option<String>> { |
| 1323 | let against_git = self.read_git(against).await?; |
| 1324 | let shared: HashSet<String> = against_git |
| 1325 | .log(&against.default_branch, MAX_ANCESTRY) |
| 1326 | .await? |
| 1327 | .into_iter() |
| 1328 | .map(|commit| commit.hash) |
| 1329 | .collect(); |
| 1330 | nearest_ancestor_in(&git, &history, &shared).await |
| 1331 | }; |
| 1332 | let base = match (a.base, &repo.fork_of) { |
| 1333 | (Some(base), _) => Some(base), |
| 1334 | // A fork is compared with the last commit it shares with the |
| 1335 | // repository it came from. |
| 1336 | (None, Some(target_id)) => match self.registry.by_id(target_id).await? { |
| 1337 | Some(target) => shared_with(&target).await?, |
| 1338 | None => None, |
| 1339 | }, |
| 1340 | // A branch, with the point where it left the default branch. |
| 1341 | // A single commit, with its first parent. |
| 1342 | (None, None) if is_commit_hash(head_ref) => head.parents.first().cloned(), |
| 1343 | (None, None) if head_ref != repo.default_branch => shared_with(&repo).await?, |
| 1344 | (None, None) => head.parents.first().cloned(), |
| 1345 | }; |
| 1346 | let base_tree = match &base { |
| 1347 | Some(base) => git |
| 1348 | .log(base, 1) |
| 1349 | .await? |
| 1350 | .into_iter() |
| 1351 | .next() |
| 1352 | .map(|commit| commit.tree_hash), |
| 1353 | None => None, |
| 1354 | }; |
| 1355 | let (files, truncated) = |
| 1356 | diff::compare_trees(&git, base_tree.as_deref(), &head.tree_hash).await?; |
| 1357 | Ok(Outcome::Ok(Comparison { |
| 1358 | base, |
| 1359 | head: head.hash.clone(), |
| 1360 | files, |
| 1361 | truncated, |
| 1362 | })) |
| 1363 | } |
| 1364 | |
| 1365 | /// Reports that `git_ref` of `repo` (a full ref) now points to `after`. |
| 1366 | async fn publish_push( |
| 1367 | &self, |
| 1368 | repo: &Repo, |
| 1369 | git_ref: &str, |
| 1370 | before: Option<&str>, |
| 1371 | after: &str, |
| 1372 | actor: Option<String>, |
| 1373 | ) -> Result<()> { |
| 1374 | self.publish_git_push(repo, git_ref, before, after, actor, false).await |
| 1375 | } |
| 1376 | |
| 1377 | /// `publish_push`, saying whether the push reached the store without |
| 1378 | /// being scanned for secrets first. |
| 1379 | async fn publish_git_push( |
| 1380 | &self, |
| 1381 | repo: &Repo, |
| 1382 | git_ref: &str, |
| 1383 | before: Option<&str>, |
| 1384 | after: &str, |
| 1385 | actor: Option<String>, |
| 1386 | unscanned: bool, |
| 1387 | ) -> Result<()> { |
| 1388 | self.publish(NewEvent { |
| 1389 | kind: "git.push", |
| 1390 | source: SOURCE, |
| 1391 | repo_id: Some(repo.id.clone()), |
| 1392 | actor, |
| 1393 | data: GitPush { |
| 1394 | repo_id: repo.id.clone(), |
| 1395 | git_ref: git_ref.to_owned(), |
| 1396 | before: before.map(str::to_owned), |
| 1397 | after: after.to_owned(), |
| 1398 | default_branch: git_ref.strip_prefix("refs/heads/") |
| 1399 | == Some(repo.default_branch.as_str()), |
| 1400 | unscanned, |
| 1401 | }, |
| 1402 | }) |
| 1403 | .await |
| 1404 | } |
| 1405 | |
| 1406 | /// Git over HTTPS. Only what decides the answer happens before it: |
| 1407 | /// the repository, who is asking and whether they may, the free |
| 1408 | /// workspace limits, push protection, and the store's own answer. The |
| 1409 | /// audit entry and what a push changed are recorded once git has its |
| 1410 | /// answer. Each answer says how long its steps took (`Server-Timing`). |
| 1411 | async fn git_http(&self, request: Request, env: &Env, ctx: &Context) -> Result<Response> { |
| 1412 | let mut timing = git_http::Timing::start(); |
| 1413 | let Some(git) = git_http::parse(&request.url()?) else { |
| 1414 | return Response::error("Not found", 404); |
| 1415 | }; |
| 1416 | let response = match self.answer_git(request, &git, env, ctx, &mut timing).await { |
| 1417 | Ok(response) => response, |
| 1418 | // The git store is busy: git hears when to try again. |
| 1419 | Err(error) => match resilience::busy(&error.to_string()) { |
| 1420 | Some(busy) => git_http::busy_response(busy)?, |
| 1421 | None => return Err(error), |
| 1422 | }, |
| 1423 | }; |
| 1424 | timing.apply(response) |
| 1425 | } |
| 1426 | |
| 1427 | async fn answer_git( |
| 1428 | &self, |
| 1429 | request: Request, |
| 1430 | git: &git_http::GitRequest, |
| 1431 | env: &Env, |
| 1432 | ctx: &Context, |
| 1433 | timing: &mut git_http::Timing, |
| 1434 | ) -> Result<Response> { |
| 1435 | let write = git.service == GitService::ReceivePack; |
| 1436 | let get = request.method() == Method::Get; |
| 1437 | let identity = env.service("IDENTITY")?; |
| 1438 | // The repository and the caller's credentials, at once. A fetch may |
| 1439 | // go by the row as read a moment ago, for the same clone's next |
| 1440 | // request; a push always reads it. Anonymous callers cost nothing. |
| 1441 | let lookup = async { |
| 1442 | if write { |
| 1443 | self.registry.by_path(&git.path).await |
| 1444 | } else { |
| 1445 | self.registry.by_path_recent(&git.path).await |
| 1446 | } |
| 1447 | }; |
| 1448 | let (found, viewer) = |
| 1449 | futures_util::future::join(lookup, git_http::viewer(&request, &identity)).await; |
| 1450 | let found = found?; |
| 1451 | timing.mark("repo"); |
| 1452 | if found.is_none() { |
| 1453 | // A workspace that was renamed: git follows a redirect when it |
| 1454 | // first asks for refs, and uses the new address from then on. |
| 1455 | // A repository transferred to another workspace: the same, to |
| 1456 | // its new path. Fetches and pushes both follow either. |
| 1457 | let url = request.url()?; |
| 1458 | let (renamed, moved) = futures_util::future::join( |
| 1459 | git_http::renamed(&url, &identity), |
| 1460 | self.registry.resolve_moved(&git.path), |
| 1461 | ) |
| 1462 | .await; |
| 1463 | timing.mark("moved"); |
| 1464 | if let Some(location) = renamed? { |
| 1465 | return git_http::moved(&location, get); |
| 1466 | } |
| 1467 | if let Some(now) = moved? |
| 1468 | && let Some(location) = git_http::transferred(&url, &now) |
| 1469 | { |
| 1470 | return git_http::moved(&location, get); |
| 1471 | } |
| 1472 | } |
| 1473 | let viewer = viewer?; |
| 1474 | // A run credential is checked against its grants, then acts as the |
| 1475 | // person it works for. See run_access.rs. |
| 1476 | let (request, viewer, audit) = match self.admit_git(request, git, viewer, found.as_ref()).await? { |
| 1477 | run_access::Admitted::Go { request, viewer, entry } => (request, viewer, entry), |
| 1478 | run_access::Admitted::Refused(response) => return Ok(response), |
| 1479 | }; |
| 1480 | let mut after = AfterGit { |
| 1481 | audit, |
| 1482 | status: 0, |
| 1483 | message: None, |
| 1484 | push: None, |
| 1485 | }; |
| 1486 | let repo = match self.authorize_git(&git.path, &viewer, git.service, found).await? { |
| 1487 | Outcome::Ok(repo) => repo, |
| 1488 | refused => { |
| 1489 | let response = git_http::refuse(refused)?; |
| 1490 | after.ended(response.status_code(), None); |
| 1491 | after.spawn(env, ctx); |
| 1492 | return Ok(response); |
| 1493 | } |
| 1494 | }; |
| 1495 | // A pull request's working copy removed after it closed is made |
| 1496 | // again before git uses it (forks.rs). |
| 1497 | self.live(&repo).await?; |
| 1498 | timing.mark("access"); |
| 1499 | // A protected default branch takes changes only from a merged pull |
| 1500 | // request, which lands without going through here. |
| 1501 | let protected = (repo.protected && repo.fork_of.is_none()).then(|| repo.default_branch.clone()); |
| 1502 | // Clones check out the default branch g1t keeps, which can have |
| 1503 | // changed since the store made the repository. |
| 1504 | let default_branch = repo.fork_of.is_none().then(|| repo.default_branch.clone()); |
| 1505 | let key = store_key(&repo); |
| 1506 | let scope = if write { Scope::Write } else { Scope::Read }; |
| 1507 | let mut request = request; |
| 1508 | let protocol = refs_cache::protocol(request.headers().get("git-protocol")?.as_deref()); |
| 1509 | // A fetch's POST is read here, to tell an `ls-refs` from a fetch of |
| 1510 | // objects; the store would have it read in full anyway. |
| 1511 | let body = if !write && !get { Some(request.bytes().await?) } else { None }; |
| 1512 | // What it asks the store, for the meters (meters.rs). |
| 1513 | let call = git_ops::classify(git.service, git.endpoint, get, body.as_deref()); |
| 1514 | // An answer that lists refs may have been kept: see refs_cache.rs. |
| 1515 | let kept_key = refs_cache::kind(git, get, protocol, body.as_deref()) |
| 1516 | .zip(refs_cache::usable(registry::refs_state(&repo.id), now_ms())) |
| 1517 | .map(|(kind, version)| { |
| 1518 | refs_cache::Key::new(&repo.id, version, default_branch.as_deref(), protocol, &kind) |
| 1519 | }); |
| 1520 | // A fresh clone's pack may have been kept too: see pack_cache.rs. |
| 1521 | // Under the same refs version, so never across a change to them. |
| 1522 | let pack_key = self |
| 1523 | .packs |
| 1524 | .as_ref() |
| 1525 | .and_then(|_| { |
| 1526 | let encoding = request.headers().get("content-encoding").ok().flatten(); |
| 1527 | pack_cache::cacheable(git, get, protocol, encoding.as_deref(), body.as_deref()) |
| 1528 | }) |
| 1529 | .zip(refs_cache::usable(registry::refs_state(&repo.id), now_ms())) |
| 1530 | .map(|(normalized, version)| pack_cache::Key::new(&repo.id, version, &normalized)); |
| 1531 | // A kept answer and the free workspace limits, with a kept |
| 1532 | // credential looked up alongside. A kept answer goes back without |
| 1533 | // waiting for the credential, which it does not need. |
| 1534 | let ((answer, pack, limited), kept_access) = { |
| 1535 | let shared = self.shared.as_deref(); |
| 1536 | let answer_and_limits = std::pin::pin!(futures_util::future::join3( |
| 1537 | async { |
| 1538 | match &kept_key { |
| 1539 | Some(kept_key) => refs_cache::get(shared, kept_key).await, |
| 1540 | None => None, |
| 1541 | } |
| 1542 | }, |
| 1543 | async { |
| 1544 | match (&pack_key, self.packs.as_deref()) { |
| 1545 | (Some(pack_key), Some(packs)) => pack_cache::get(packs, pack_key).await, |
| 1546 | _ => None, |
| 1547 | } |
| 1548 | }, |
| 1549 | self.git_limits(call, git, &repo, env), |
| 1550 | )); |
| 1551 | let kept_access = std::pin::pin!(self.store.kept_access(&key, scope)); |
| 1552 | match futures_util::future::select(answer_and_limits, kept_access).await { |
| 1553 | futures_util::future::Either::Left((first, kept_access)) => { |
| 1554 | let answered = first.0.is_some() || first.1.is_some() || matches!(first.2, Ok(Some(_)) | Err(_)); |
| 1555 | (first, if answered { None } else { kept_access.await }) |
| 1556 | } |
| 1557 | futures_util::future::Either::Right((kept_access, first)) => (first.await, kept_access), |
| 1558 | } |
| 1559 | }; |
| 1560 | timing.mark("kept"); |
| 1561 | if let Some((response, status, message)) = limited? { |
| 1562 | after.ended(status, Some(message.to_owned())); |
| 1563 | after.spawn(env, ctx); |
| 1564 | return Ok(response); |
| 1565 | } |
| 1566 | if let Some(kept) = pack { |
| 1567 | timing.note("pack", "hit"); |
| 1568 | // Never reached the store: never an operation. |
| 1569 | let sent = body.as_ref().map_or(0, |body| body.len() as u64); |
| 1570 | meters::record(pack_cache::HIT, &key, sent, kept.size); |
| 1571 | after.ended(200, None); |
| 1572 | after.spawn(env, ctx); |
| 1573 | return kept.response(); |
| 1574 | } |
| 1575 | if pack_key.is_some() { |
| 1576 | timing.note("pack", "miss"); |
| 1577 | } |
| 1578 | if let (Some((entry, found)), Some(kept_key)) = (answer, &kept_key) { |
| 1579 | timing.note("refs", found.as_str()); |
| 1580 | if found == refs_cache::Found::Shared { |
| 1581 | let (kept_key, entry) = (kept_key.clone(), entry.clone()); |
| 1582 | ctx.wait_until(async move { refs_cache::keep_in_colo(&kept_key, &entry).await }); |
| 1583 | } |
| 1584 | // Never reached the store: never an operation. |
| 1585 | meters::record(call.cached_meter(), &key, 0, entry.body.len() as u64); |
| 1586 | after.ended(200, None); |
| 1587 | after.spawn(env, ctx); |
| 1588 | return entry.response(); |
| 1589 | } |
| 1590 | if kept_key.is_some() { |
| 1591 | timing.note("refs", "miss"); |
| 1592 | } |
| 1593 | // The store's credential: one made a moment ago, here or in another |
| 1594 | // isolate (see store.rs), or a new one. |
| 1595 | let access = match kept_access { |
| 1596 | Some((access, from)) => { |
| 1597 | timing.note("cred", from.as_str()); |
| 1598 | access |
| 1599 | } |
| 1600 | None => { |
| 1601 | let access = self.store.mint_access(&key, scope).await?; |
| 1602 | timing.mark("mint"); |
| 1603 | timing.note("cred", "mint"); |
| 1604 | access |
| 1605 | } |
| 1606 | }; |
| 1607 | // Should the store turn a kept credential down, a fetch's first |
| 1608 | // request is tried again with a new one; the requests after it then |
| 1609 | // have that one too. |
| 1610 | let again = if get { Some(request.clone()?) } else { None }; |
| 1611 | // Push protection: a push that adds a secret is refused. See secret_scan.rs. |
| 1612 | let scan = async |body: &[u8]| self.protect(&repo, viewer.as_ref(), body).await; |
| 1613 | // What a push may bring (pack_limits.rs): the repository's size is |
| 1614 | // its own and its pull requests' working copies'. |
| 1615 | let limits = if write && !get { |
| 1616 | git_http::PushLimits { |
| 1617 | held: self.held(&repo).await, |
| 1618 | repo_limit: self.repo_limit, |
| 1619 | large: self.large_pushes, |
| 1620 | ..git_http::PushLimits::default() |
| 1621 | } |
| 1622 | } else { |
| 1623 | git_http::PushLimits::default() |
| 1624 | }; |
| 1625 | let mut outcome = git_http::forward( |
| 1626 | request, |
| 1627 | body, |
| 1628 | git, |
| 1629 | &access, |
| 1630 | protected.as_deref(), |
| 1631 | default_branch.as_deref(), |
| 1632 | limits, |
| 1633 | scan, |
| 1634 | ) |
| 1635 | .await?; |
| 1636 | let turned_down = matches!( |
| 1637 | &outcome, |
| 1638 | git_http::Push::Forwarded(forwarded) if matches!(forwarded.response.status_code(), 401 | 403) |
| 1639 | ); |
| 1640 | if turned_down { |
| 1641 | self.store.forget_access(&key).await; |
| 1642 | if let Some(again) = again { |
| 1643 | let access = self.store.mint_access(&key, scope).await?; |
| 1644 | let nothing = async |_: &[u8]| Ok(None); |
| 1645 | outcome = git_http::forward( |
| 1646 | again, |
| 1647 | None, |
| 1648 | git, |
| 1649 | &access, |
| 1650 | protected.as_deref(), |
| 1651 | default_branch.as_deref(), |
| 1652 | git_http::PushLimits::default(), |
| 1653 | nothing, |
| 1654 | ) |
| 1655 | .await?; |
| 1656 | } |
| 1657 | } |
| 1658 | let forwarded = |
| 1659 | match outcome { |
| 1660 | git_http::Push::Forwarded(forwarded) => forwarded, |
| 1661 | git_http::Push::Refused(response) => { |
| 1662 | after.ended(403, Some("The push would change a protected branch.".to_owned())); |
| 1663 | after.spawn(env, ctx); |
| 1664 | return Ok(response); |
| 1665 | } |
| 1666 | git_http::Push::Blocked(response) => { |
| 1667 | after.ended(403, Some("The push adds a secret.".to_owned())); |
| 1668 | after.spawn(env, ctx); |
| 1669 | return Ok(response); |
| 1670 | } |
| 1671 | git_http::Push::Declined(response, reason) => { |
| 1672 | after.ended(403, Some(format!("The push was declined: {reason}."))); |
| 1673 | after.spawn(env, ctx); |
| 1674 | return Ok(response); |
| 1675 | } |
| 1676 | }; |
| 1677 | if forwarded.from_store { |
| 1678 | let received = forwarded |
| 1679 | .response |
| 1680 | .headers() |
| 1681 | .get("content-length")? |
| 1682 | .and_then(|length| length.parse().ok()) |
| 1683 | .unwrap_or(0); |
| 1684 | meters::record(call.meter(), &key, forwarded.sent, received); |
| 1685 | } |
| 1686 | timing.mark("store"); |
| 1687 | let mut response = forwarded.response; |
| 1688 | let status = response.status_code(); |
| 1689 | if write && !get { |
| 1690 | // A push: the store has moved its refs once it has answered in |
| 1691 | // full, so the answer is read before the change is recorded, and |
| 1692 | // only then goes back. Whoever fetches after it sees the push. |
| 1693 | let headers = response.headers().clone(); |
| 1694 | headers.delete("content-length")?; |
| 1695 | let report = response.bytes().await?; |
| 1696 | self.refs_moved(&repo.id).await; |
| 1697 | timing.mark("refs"); |
| 1698 | response = Response::from_bytes(report)?.with_headers(headers).with_status(status); |
| 1699 | } else if let (Some(kept_key), 200) = (&kept_key, status) { |
| 1700 | // A miss: this answer is kept for the next to ask. |
| 1701 | let headers = response.headers().clone(); |
| 1702 | headers.delete("content-length")?; |
| 1703 | let body = response.bytes().await?; |
| 1704 | if let Some(content_type) = headers.get("content-type")? { |
| 1705 | let entry = refs_cache::Entry { content_type, body: body.clone() }; |
| 1706 | if entry.keepable() { |
| 1707 | let shared = self.shared.clone(); |
| 1708 | let kept_key = kept_key.clone(); |
| 1709 | ctx.wait_until(async move { refs_cache::keep(shared.as_deref(), &kept_key, &entry).await }); |
| 1710 | } |
| 1711 | } |
| 1712 | response = Response::from_bytes(body)?.with_headers(headers).with_status(status); |
| 1713 | } else if let (Some(pack_key), Some(packs), true) = (&pack_key, &self.packs, forwarded.from_store) { |
| 1714 | // A fresh clone the bucket did not have: counted, and its pack |
| 1715 | // kept as it streams to git, when it is a whole one. |
| 1716 | meters::record(pack_cache::MISS, &key, forwarded.sent, 0); |
| 1717 | if status == 200 { |
| 1718 | let store_key = key.clone(); |
| 1719 | let measured = Box::new(move |bytes: u64| meters::record_bytes(pack_cache::MISS, &store_key, 0, bytes)); |
| 1720 | let (teed, filling) = pack_cache::tee(response, packs.clone(), pack_key, measured)?; |
| 1721 | response = teed; |
| 1722 | if let Some(filling) = filling { |
| 1723 | let pack_key = pack_key.clone(); |
| 1724 | ctx.wait_until(async move { |
| 1725 | let filled = filling.await; |
| 1726 | if !matches!(filled, pack_cache::Filled::Kept { .. } | pack_cache::Filled::Abandoned) { |
| 1727 | worker::console_warn!("pack {} not kept: {filled:?}", pack_key.as_str()); |
| 1728 | } |
| 1729 | }); |
| 1730 | } |
| 1731 | } |
| 1732 | } |
| 1733 | after.ended(status, None); |
| 1734 | if status == 200 && (forwarded.pack_bytes > 0 || !forwarded.pushed.is_empty()) { |
| 1735 | after.push = Some(PushDone { |
| 1736 | repo, |
| 1737 | pushed: forwarded.pushed, |
| 1738 | pack_bytes: forwarded.pack_bytes, |
| 1739 | actor: viewer.map(|user: User| user.id), |
| 1740 | unscanned: forwarded.unscanned, |
| 1741 | }); |
| 1742 | } |
| 1743 | after.spawn(env, ctx); |
| 1744 | Ok(response) |
| 1745 | } |
| 1746 | |
| 1747 | /// The answer for a request a free workspace's limits stop, or a push |
| 1748 | /// to a full repository, with its status and reason for the audit log; |
| 1749 | /// `None` to go on. |
| 1750 | /// |
| 1751 | /// A clone, fetch or push is a git operation, which the git store |
| 1752 | /// charges g1t for: counted for billing once the answer has gone back |
| 1753 | /// (meters.rs), and a free workspace far past its share is slowed down |
| 1754 | /// rather than charged (see git_ops.rs). Whether it is past it is |
| 1755 | /// decided from counts this isolate already holds: the database is not |
| 1756 | /// asked on the way. A free workspace is never charged for private |
| 1757 | /// storage: once its private repositories hold the free amount, pushes |
| 1758 | /// to them stop, checked when a push begins so that git shows the |
| 1759 | /// reason. So do pushes to a repository at the store's size limit. |
| 1760 | async fn git_limits( |
| 1761 | &self, |
| 1762 | call: git_ops::GitCall, |
| 1763 | git: &git_http::GitRequest, |
| 1764 | repo: &Repo, |
| 1765 | env: &Env, |
| 1766 | ) -> Result<Option<(Response, u16, &'static str)>> { |
| 1767 | let namespace = git.path.namespace.to_lowercase(); |
| 1768 | if meters::mapping_now().billable(call.meter()) > 0.0 { |
| 1769 | let now = now_ms(); |
| 1770 | let hour = git_ops::hour_key(&rfc3339(now)); |
| 1771 | let limits = git_ops::Limits::from_env(env); |
| 1772 | if let Some((month, hour_ops)) = git_ops::standing(&namespace, &hour, now) |
| 1773 | && git_ops::slow_down(month + 1, hour_ops + 1, limits.free_cap, limits.hourly) |
| 1774 | && git_ops::is_free_kept(env.service("BILLING").ok().as_ref(), &namespace).await |
| 1775 | { |
| 1776 | return Ok(Some(( |
| 1777 | git_ops::too_many(&namespace, limits.free_cap, limits.hourly)?, |
| 1778 | 429, |
| 1779 | "Too many git operations this hour.", |
| 1780 | ))); |
| 1781 | } |
| 1782 | } |
| 1783 | if git.service == GitService::ReceivePack && git.endpoint == "info/refs" { |
| 1784 | let held = self.held(repo).await; |
| 1785 | if held >= self.repo_limit { |
| 1786 | let message = format!( |
| 1787 | "{}/{} holds about {}, the most a repository may hold on g1t, so it takes no more pushes. Delete what you no longer need, or split it: https://docs.g1t.sh/guides/git/#size-limits\n", |
| 1788 | repo.namespace, |
| 1789 | repo.name, |
| 1790 | pack_limits::megabytes(held) |
| 1791 | ); |
| 1792 | return Ok(Some((Response::error(message, 403)?, 403, "The repository is full."))); |
| 1793 | } |
| 1794 | } |
| 1795 | if git.service == GitService::ReceivePack && git.endpoint == "info/refs" && repo.is_private { |
| 1796 | let free = git_ops::free_private_bytes(env); |
| 1797 | let held = self.registry.private_bytes(&namespace).await.unwrap_or(0); |
| 1798 | if git_ops::storage_full(held, free) |
| 1799 | && git_ops::is_free(env.service("BILLING").ok().as_ref(), &namespace).await |
| 1800 | { |
| 1801 | return Ok(Some(( |
| 1802 | git_ops::storage_full_response(&namespace, held, free)?, |
| 1803 | 403, |
| 1804 | "Free private storage is full.", |
| 1805 | ))); |
| 1806 | } |
| 1807 | } |
| 1808 | Ok(None) |
| 1809 | } |
| 1810 | |
| 1811 | /// What a repository and its pull requests' working copies hold, as |
| 1812 | /// g1t counts it: read for a push's first request, kept a minute for |
| 1813 | /// the rest of it. |
| 1814 | async fn held(&self, repo: &Repo) -> u64 { |
| 1815 | let root = repo.fork_of.clone().unwrap_or_else(|| repo.id.clone()); |
| 1816 | let now = now_ms(); |
| 1817 | if let Some(held) = HELD.with(|held| held.borrow().get(&root, now)) { |
| 1818 | return held; |
| 1819 | } |
| 1820 | let held = self.registry.stored_bytes(&root).await.unwrap_or(0).max(0) as u64; |
| 1821 | HELD.with(|kept| kept.borrow_mut().put(root, held, now)); |
| 1822 | held |
| 1823 | } |
| 1824 | |
| 1825 | /// What a push changed, recorded once git has its answer. |
| 1826 | async fn record_push(&self, push: PushDone) -> Result<()> { |
| 1827 | let PushDone { |
| 1828 | repo, |
| 1829 | pushed, |
| 1830 | pack_bytes, |
| 1831 | actor, |
| 1832 | unscanned, |
| 1833 | } = push; |
| 1834 | // What the push stored, for billing's storage meter. A failure only |
| 1835 | // leaves the count short. |
| 1836 | if pack_bytes > 0 |
| 1837 | && let Err(error) = self.registry.add_stored_bytes(&repo, pack_bytes).await |
| 1838 | { |
| 1839 | worker::console_error!("stored bytes for {} not counted: {error}", repo.name); |
| 1840 | } |
| 1841 | if pushed.is_empty() { |
| 1842 | return Ok(()); |
| 1843 | } |
| 1844 | // Artifacts' own push notifications are per repository, which does |
| 1845 | // not fit a repo per pull request, so the front end reports pushes |
| 1846 | // itself: one event for each branch that moved. |
| 1847 | let stored = self.store.open(&store_key(&repo)).await?; |
| 1848 | for pushed in &pushed { |
| 1849 | // The store can refuse one ref and accept another, so each |
| 1850 | // branch is checked against where it actually is. A tag the |
| 1851 | // store cannot read back is taken as pushed. |
| 1852 | let moved = match pushed.branch() { |
| 1853 | Some(branch) => stored |
| 1854 | .log(branch, 1) |
| 1855 | .await? |
| 1856 | .first() |
| 1857 | .is_some_and(|commit| commit.hash == pushed.after), |
| 1858 | None => stored.log(&pushed.git_ref, 1).await.map_or(true, |head| { |
| 1859 | head.first().is_none_or(|commit| commit.hash == pushed.after) |
| 1860 | }), |
| 1861 | }; |
| 1862 | if moved { |
| 1863 | self.publish_git_push( |
| 1864 | &repo, |
| 1865 | &pushed.git_ref, |
| 1866 | pushed.before.as_deref(), |
| 1867 | &pushed.after, |
| 1868 | actor.clone(), |
| 1869 | unscanned, |
| 1870 | ) |
| 1871 | .await?; |
| 1872 | } |
| 1873 | } |
| 1874 | Ok(()) |
| 1875 | } |
| 1876 | } |
| 1877 | |
| 1878 | /// A push the store accepted, to be recorded once git has its answer. |
| 1879 | struct PushDone { |
| 1880 | repo: Repo, |
| 1881 | pushed: Vec<git_http::Pushed>, |
| 1882 | pack_bytes: u64, |
| 1883 | actor: Option<String>, |
| 1884 | /// Too large to scan for secrets before it was stored. |
| 1885 | unscanned: bool, |
| 1886 | } |
| 1887 | |
| 1888 | /// What a git request leaves for after its answer: its audit entry, with |
| 1889 | /// how the request ended, and what a push changed. |
| 1890 | struct AfterGit { |
| 1891 | audit: Option<Box<g1t_contracts::audit::NewAuditEntry>>, |
| 1892 | status: u16, |
| 1893 | message: Option<String>, |
| 1894 | push: Option<PushDone>, |
| 1895 | } |
| 1896 | |
| 1897 | impl AfterGit { |
| 1898 | fn ended(&mut self, status: u16, message: Option<String>) { |
| 1899 | self.status = status; |
| 1900 | self.message = message; |
| 1901 | } |
| 1902 | |
| 1903 | /// Does the work once the response is on its way. A failure is logged: |
| 1904 | /// git has already been told how its request went. |
| 1905 | fn spawn(self, env: &Env, ctx: &Context) { |
| 1906 | if self.audit.is_none() && self.push.is_none() { |
| 1907 | return; |
| 1908 | } |
| 1909 | let env = env.clone(); |
| 1910 | ctx.wait_until(async move { |
| 1911 | let repos = match service(&env) { |
| 1912 | Ok(repos) => repos, |
| 1913 | Err(error) => { |
| 1914 | worker::console_error!("git request not recorded: {error}"); |
| 1915 | return; |
| 1916 | } |
| 1917 | }; |
| 1918 | repos.finish_git(self.audit, self.status, self.message).await; |
| 1919 | if let Some(push) = self.push |
| 1920 | && let Err(error) = repos.record_push(push).await |
| 1921 | { |
| 1922 | worker::console_error!("push not recorded: {error}"); |
| 1923 | } |
| 1924 | }); |
| 1925 | } |
| 1926 | } |
| 1927 | |
| 1928 | fn service(env: &Env) -> Result<Repos<ArtifactsStore>> { |
| 1929 | let shared = shared::Shared::from_env(env).map(Rc::new); |
| 1930 | Ok(Repos { |
| 1931 | registry: Registry { db: env.d1("DB")? }, |
| 1932 | store: ArtifactsStore::new(env, shared.clone())?, |
| 1933 | shared, |
| 1934 | packs: pack_cache::R2Packs::from_env(env).map(Rc::new), |
| 1935 | events: env.service("EVENTS")?, |
| 1936 | security: env.service("SECURITY").ok(), |
| 1937 | billing: env.service("BILLING").ok(), |
| 1938 | identity: env.service("IDENTITY").ok(), |
| 1939 | free_private_bytes: git_ops::free_private_bytes(env), |
| 1940 | fork_days: forks::retention_days(env), |
| 1941 | repo_limit: env |
| 1942 | .var("REPO_STORAGE_LIMIT_BYTES") |
| 1943 | .ok() |
| 1944 | .and_then(|value| value.to_string().parse().ok()) |
| 1945 | .unwrap_or(pack_limits::DEFAULT_REPO_LIMIT_BYTES), |
| 1946 | large_pushes: git_http::LargePushes::from_var(env.var("LARGE_PUSHES").ok().map(|value| value.to_string()).as_deref()), |
| 1947 | placement: shards::Placement::from_vars( |
| 1948 | env.var("ARTIFACTS_NEW_REPOS").ok().map(|value| value.to_string()).as_deref(), |
| 1949 | env.var("ARTIFACTS_EU_NAMESPACE").ok().map(|value| value.to_string()).as_deref(), |
| 1950 | ), |
| 1951 | }) |
| 1952 | } |
| 1953 | |
| 1954 | /// Writes what this isolate metered once the answer has gone back, every |
| 1955 | /// few seconds at most (meters.rs). |
| 1956 | fn flush_later(env: &Env, ctx: &Context) { |
| 1957 | if !meters::take_due() { |
| 1958 | return; |
| 1959 | } |
| 1960 | if let Ok(db) = env.d1("DB") { |
| 1961 | ctx.wait_until(async move { meters::flush(&db).await }); |
| 1962 | } |
| 1963 | } |
| 1964 | |
| 1965 | /// `/backups/<job id>/parts/<number>`: the job and the part's number. |
| 1966 | fn backup_part_path(path: &str) -> Option<(String, u16)> { |
| 1967 | let rest = path.strip_prefix("/backups/")?; |
| 1968 | let (job, number) = rest.split_once("/parts/")?; |
| 1969 | let number = number.parse::<u16>().ok()?; |
| 1970 | (!job.is_empty() && !job.contains('/')).then(|| (job.to_owned(), number)) |
| 1971 | } |
| 1972 | |
| 1973 | fn backups_off<T>() -> Outcome<T> { |
| 1974 | Outcome::fail(FailureCode::Conflict, "Backups are off on this installation: it has no storage for them.") |
| 1975 | } |
| 1976 | |
| 1977 | /// One part of a backup's bundle, with the job's token in its header. |
| 1978 | async fn backup_part(request: &mut Request, env: &Env, repos: &Repos<ArtifactsStore>, job_id: String, number: u16) -> Result<Response> { |
| 1979 | let Some(blobs) = backups::storage(env) else { |
| 1980 | return reply(&backups_off::<()>()); |
| 1981 | }; |
| 1982 | let token = request.headers().get(g1t_contracts::backups::TOKEN_HEADER)?.unwrap_or_default(); |
| 1983 | let bytes = request.bytes().await?; |
| 1984 | let job = g1t_contracts::backups::BackupJobArgs { job_id, token }; |
| 1985 | reply(&backups::part(&repos.registry.db, &blobs, &job, number, bytes).await?) |
| 1986 | } |
| 1987 | |
| 1988 | #[cfg(test)] |
| 1989 | mod backup_path_tests { |
| 1990 | use super::backup_part_path; |
| 1991 | |
| 1992 | #[test] |
| 1993 | fn a_part_is_named_by_its_job_and_number() { |
| 1994 | assert_eq!(backup_part_path("/backups/bkp_1/parts/3"), Some(("bkp_1".to_owned(), 3))); |
| 1995 | assert_eq!(backup_part_path("/backups/bkp_1/parts/x"), None); |
| 1996 | assert_eq!(backup_part_path("/backups//parts/1"), None); |
| 1997 | assert_eq!(backup_part_path("/acme/rocket.git/info/refs"), None); |
| 1998 | } |
| 1999 | } |
| 2000 | |
| 2001 | /// Read methods whose answer is an `Outcome`: when the git store is busy, |
| 2002 | /// the site is told so in words instead of failing the page. |
| 2003 | const OUTCOME_READS: [&str; 6] = ["tree", "blob", "log", "branches", "blame", "compare"]; |
| 2004 | |
| 2005 | #[event(fetch)] |
| 2006 | async fn fetch(mut request: Request, env: Env, ctx: Context) -> Result<Response> { |
| 2007 | let mut repos = service(&env)?; |
| 2008 | // A part of a backup's bundle, as the API passes it on from the |
| 2009 | // sandbox: bytes, not JSON (backups.rs). |
| 2010 | if request.method() == Method::Put |
| 2011 | && let Some((job_id, number)) = backup_part_path(&request.path()) |
| 2012 | { |
| 2013 | let answered = backup_part(&mut request, &env, &repos, job_id, number).await; |
| 2014 | flush_later(&env, &ctx); |
| 2015 | return answered; |
| 2016 | } |
| 2017 | let Some(method) = rpc_method(&request) else { |
| 2018 | let answered = repos.git_http(request, &env, &ctx).await; |
| 2019 | flush_later(&env, &ctx); |
| 2020 | return answered; |
| 2021 | }; |
| 2022 | // A replica near the caller when it asks for one (crates/kit/src/d1.rs). |
| 2023 | // Git over HTTPS above always reads the primary. |
| 2024 | let (db, served) = g1t_kit::d1::open(&env, "DB", &request)?; |
| 2025 | repos.registry.db = db; |
| 2026 | let body: serde_json::Value = request.json().await?; |
| 2027 | |
| 2028 | let answered = async { match method.as_str() { |
| 2029 | "get" => reply(&repos.get(args(body)?).await?), |
| 2030 | "get_by_id" => reply(&repos.get_by_id(args(body)?).await?), |
| 2031 | "readable" => { |
| 2032 | let a: ReadableArgs = args(body)?; |
| 2033 | reply(&repos.registry.readable(&a.ids, &a.viewer).await?) |
| 2034 | } |
| 2035 | "public_namespaces" => { |
| 2036 | let a: PublicNamespacesArgs = args(body)?; |
| 2037 | reply(&repos.registry.public_namespaces(&a.owner_id).await?) |
| 2038 | } |
| 2039 | "path_by_id" => { |
| 2040 | let a: PathByIdArgs = args(body)?; |
| 2041 | reply( |
| 2042 | &repos |
| 2043 | .registry |
| 2044 | .by_id(&a.id) |
| 2045 | .await? |
| 2046 | .filter(|repo| repo.fork_of.is_none()) |
| 2047 | .map(|repo| RepoPath { |
| 2048 | namespace: repo.namespace, |
| 2049 | name: repo.name, |
| 2050 | }), |
| 2051 | ) |
| 2052 | } |
| 2053 | "list" => { |
| 2054 | let a: ListArgs = args(body)?; |
| 2055 | reply( |
| 2056 | &repos |
| 2057 | .registry |
| 2058 | .list( |
| 2059 | &a.viewer, |
| 2060 | a.query.as_deref(), |
| 2061 | a.namespace.as_deref(), |
| 2062 | a.member_only, |
| 2063 | ) |
| 2064 | .await?, |
| 2065 | ) |
| 2066 | } |
| 2067 | "create" => reply(&repos.create(args(body)?).await?), |
| 2068 | // Services only: a GitHub mirror catching up, or pushing out. |
| 2069 | "mirror" => reply(&repos.mirror(args(body)?).await?), |
| 2070 | "transfer" => reply(&repos.transfer(args(body)?).await?), |
| 2071 | // A repository's lifecycle: see lifecycle.rs. |
| 2072 | "delete" => reply(&repos.delete(args(body)?).await?), |
| 2073 | "deleted" => reply(&repos.deleted(args(body)?).await?), |
| 2074 | "restore" => reply(&repos.restore(args(body)?).await?), |
| 2075 | "purge" => reply(&repos.purge(args(body)?).await?), |
| 2076 | "purge_due" => reply(&repos.purge_due(args(body)?).await?), |
| 2077 | "rename" => reply(&repos.rename(args(body)?).await?), |
| 2078 | "archive" => reply(&repos.archive(args(body)?).await?), |
| 2079 | "set_visibility" => reply(&repos.set_visibility(args(body)?).await?), |
| 2080 | "set_default_branch" => reply(&repos.set_default_branch(args(body)?).await?), |
| 2081 | "rename_branch" => reply(&repos.rename_branch(args(body)?).await?), |
| 2082 | "resolve_branch" => reply(&repos.resolve_branch(args(body)?).await?), |
| 2083 | "status_by_id" => reply(&repos.status_by_id(args(body)?).await?), |
| 2084 | "resolve_path" => { |
| 2085 | let a: ResolvePathArgs = args(body)?; |
| 2086 | reply(&repos.registry.resolve_moved(&a.path).await?) |
| 2087 | } |
| 2088 | "namespace_count" => { |
| 2089 | let a: NamespaceCountArgs = args(body)?; |
| 2090 | reply(&repos.registry.count_in(&a.namespace).await?) |
| 2091 | } |
| 2092 | "update" => reply(&repos.update(args(body)?).await?), |
| 2093 | "tree" => reply(&repos.tree(args(body)?).await?), |
| 2094 | "blob" => reply(&repos.blob(args(body)?).await?), |
| 2095 | "log" => reply(&repos.log(args(body)?).await?), |
| 2096 | "blame" => reply(&repos.blame(args(body)?).await?), |
| 2097 | "fork_for_pull" => reply(&repos.fork_for_pull(args(body)?).await?), |
| 2098 | "git_access" => reply(&repos.git_access(args(body)?).await?), |
| 2099 | "branches" => reply(&repos.branches(args(body)?).await?), |
| 2100 | "last_commits" => reply(&repos.last_commits(args(body)?).await?), |
| 2101 | "tags" => reply(&repos.tags(args(body)?).await?), |
| 2102 | "head" => reply(&repos.head(args(body)?).await?), |
| 2103 | "behind" => reply(&repos.behind(args(body)?).await?), |
| 2104 | "divergence" => reply(&repos.divergence(args(body)?).await?), |
| 2105 | "land" => reply(&repos.land(args(body)?).await?), |
| 2106 | "update_pull_branch" => reply(&repos.update_pull_branch(args(body)?).await?), |
| 2107 | "delete_branch" => reply(&repos.delete_branch(args(body)?).await?), |
| 2108 | "commit_file" => reply(&repos.commit_file(args(body)?).await?), |
| 2109 | "compare" => reply(&repos.compare(args(body)?).await?), |
| 2110 | "scan_history" => reply(&repos.scan_history(args(body)?).await?), |
| 2111 | "find_lockfiles" => reply(&repos.find_lockfiles(args(body)?).await?), |
| 2112 | "list_files" => reply(&repos.list_files(args(body)?).await?), |
| 2113 | "changed_files" => reply(&repos.changed_files(args(body)?).await?), |
| 2114 | "read_blobs" => reply(&repos.read_blobs(args(body)?).await?), |
| 2115 | // Services only: what the Composer registry builds packages from. |
| 2116 | "refs" => reply(&repos.refs_of(args(body)?).await?), |
| 2117 | "raw_file" => reply(&repos.raw_file(args(body)?).await?), |
| 2118 | "raw_blobs" => reply(&repos.raw_blobs(args(body)?).await?), |
| 2119 | "visibility" => { |
| 2120 | let a: g1t_contracts::repos::VisibilityArgs = args(body)?; |
| 2121 | reply(&repos.registry.visibility(&a.paths).await?) |
| 2122 | } |
| 2123 | "storage" => reply(&repos.registry.storage().await?), |
| 2124 | "git_operations" => { |
| 2125 | let a: GitOperationsArgs = args(body)?; |
| 2126 | reply(&git_ops::totals(&repos.registry.db, &a.month, a.since.as_deref(), a.namespace.as_deref().map(str::to_lowercase).as_deref()).await?) |
| 2127 | } |
| 2128 | "all_ids" => { |
| 2129 | let a: AllIdsArgs = args(body)?; |
| 2130 | let limit = a.limit.clamp(1, 500); |
| 2131 | let ids = repos.registry.ids_after(a.after.as_deref(), limit).await?; |
| 2132 | let next = (ids.len() == limit as usize).then(|| ids.last().cloned()).flatten(); |
| 2133 | reply(&IdPage { ids, next }) |
| 2134 | } |
| 2135 | // The raw meters of the git store, for reconciling with Cloudflare |
| 2136 | // (meters.rs, scripts/ops/artifacts-usage.mjs). |
| 2137 | "artifacts_usage" => { |
| 2138 | let a: meters::UsageArgs = args(body)?; |
| 2139 | reply(&meters::usage(&repos.registry.db, &a).await?) |
| 2140 | } |
| 2141 | "operation_mapping" => reply(&meters::read_mapping(&repos.registry.db).await?), |
| 2142 | // Services only: which meters are operations, changed without a deploy. |
| 2143 | "set_operation_mapping" => { |
| 2144 | let row: meters::MappingRow = args(body)?; |
| 2145 | meters::set_mapping(&repos.registry.db, &row, &rfc3339(now_ms())).await?; |
| 2146 | reply(&meters::read_mapping(&repos.registry.db).await?) |
| 2147 | } |
| 2148 | // Backups (backups.rs): the runner's sweep claims queued ones, and |
| 2149 | // each sandbox, through the API, asks for its job and says how it went. |
| 2150 | "claim_backups" => { |
| 2151 | let a: g1t_contracts::backups::ClaimBackupsArgs = args(body)?; |
| 2152 | let blobs = backups::storage(&env); |
| 2153 | reply(&backups::claim(&repos.registry.db, blobs.as_ref(), &a, now_ms()).await?) |
| 2154 | } |
| 2155 | "backup_spec" => match backups::storage(&env) { |
| 2156 | Some(blobs) => { |
| 2157 | let a: g1t_contracts::backups::BackupJobArgs = args(body)?; |
| 2158 | let every = backups::Settings::from_env(&env).full_every; |
| 2159 | reply(&backups::spec(&repos.registry, &blobs, &repos.store, &a, every, now_ms()).await?) |
| 2160 | } |
| 2161 | None => reply(&backups_off::<bool>()), |
| 2162 | }, |
| 2163 | "backup_complete" => match backups::storage(&env) { |
| 2164 | Some(blobs) => reply(&backups::complete(&repos.registry, &blobs, &args(body)?, now_ms()).await?), |
| 2165 | None => reply(&backups_off::<bool>()), |
| 2166 | }, |
| 2167 | "backup_fail" => match backups::storage(&env) { |
| 2168 | Some(blobs) => reply(&backups::fail(&repos.registry.db, &blobs, &args(body)?).await?), |
| 2169 | None => reply(&backups_off::<bool>()), |
| 2170 | }, |
| 2171 | // How the git store has been answering, for the status page. |
| 2172 | "store_health" => { |
| 2173 | let a: meters::HealthArgs = args(body)?; |
| 2174 | reply(&meters::health(&repos.registry.db, &a).await?) |
| 2175 | } |
| 2176 | _ => Response::error("Unknown method", 404), |
| 2177 | } } |
| 2178 | .await; |
| 2179 | // The git store is busy: said in words, with when to try again. |
| 2180 | let answered = match answered { |
| 2181 | Err(error) => match resilience::busy(&error.to_string()) { |
| 2182 | Some(busy) if OUTCOME_READS.contains(&method.as_str()) => { |
| 2183 | reply(&Outcome::<()>::fail(FailureCode::Conflict, busy.message().trim())) |
| 2184 | } |
| 2185 | Some(busy) => { |
| 2186 | let response = Response::error(busy.message(), 503)?; |
| 2187 | response.headers().set("retry-after", &busy.retry_after.to_string())?; |
| 2188 | Ok(response) |
| 2189 | } |
| 2190 | None => Err(error), |
| 2191 | }, |
| 2192 | answered => answered, |
| 2193 | }; |
| 2194 | flush_later(&env, &ctx); |
| 2195 | served.finish(answered) |
| 2196 | } |
| 2197 | |
| 2198 | /// The nightly cron in wrangler.jsonc: tonight's backups are queued. |
| 2199 | const BACKUP_CRON: &str = "53 2 * * *"; |
| 2200 | |
| 2201 | /// The hourly sweep: deleted repositories whose time to be restored has |
| 2202 | /// passed are purged. See lifecycle.rs. And, at [`BACKUP_CRON`], the |
| 2203 | /// repositories whose refs moved are queued for a backup (backups.rs). |
| 2204 | #[event(scheduled)] |
| 2205 | async fn scheduled(event: ScheduledEvent, env: Env, _ctx: ScheduleContext) { |
| 2206 | let repos = match service(&env) { |
| 2207 | Ok(repos) => repos, |
| 2208 | Err(error) => { |
| 2209 | worker::console_error!("repos: the sweep could not start: {error}"); |
| 2210 | return; |
| 2211 | } |
| 2212 | }; |
| 2213 | if event.cron() == BACKUP_CRON { |
| 2214 | let Some(blobs) = backups::storage(&env) else { return }; |
| 2215 | match backups::nightly(&repos.registry.db, &blobs, backups::Settings::from_env(&env), now_ms()).await { |
| 2216 | Ok(night) => worker::console_log!("repos: queued {} backups, removed {} of purged repositories", night.queued, night.pruned), |
| 2217 | Err(error) => worker::console_error!("repos: backups could not be queued: {error}"), |
| 2218 | } |
| 2219 | return; |
| 2220 | } |
| 2221 | match repos.purge_due(PurgeDueArgs::default()).await { |
| 2222 | Ok(0) => {} |
| 2223 | Ok(count) => worker::console_log!("repos: purged {count} deleted repositories"), |
| 2224 | Err(error) => worker::console_error!("repos: the purge sweep failed: {error}"), |
| 2225 | } |
| 2226 | // Pull requests' working copies whose time has come (forks.rs). |
| 2227 | match repos.retire_due().await { |
| 2228 | Ok(0) => {} |
| 2229 | Ok(count) => worker::console_log!("repos: removed {count} pull request working copies"), |
| 2230 | Err(error) => worker::console_error!("repos: the working copy sweep failed: {error}"), |
| 2231 | } |
| 2232 | meters::flush(&repos.registry.db).await; |
| 2233 | } |
| 2234 | |
| 2235 | /// Events from the bus. A workspace's rename: its repositories move to the |
| 2236 | /// workspace's current slug, asked of identity by id, so a repeated or late |
| 2237 | /// delivery lands in the same place; their git store keys stay as they |
| 2238 | /// were. A workspace's deletion: its repositories are deleted with it, |
| 2239 | /// restored with it, or purged with it. |
| 2240 | #[event(queue)] |
| 2241 | async fn queue(batch: MessageBatch<Event>, env: Env, ctx: Context) -> Result<()> { |
| 2242 | let registry = Registry { db: env.d1("DB")? }; |
| 2243 | let identity = env.service("IDENTITY")?; |
| 2244 | let handled = handle_events(&batch, &env, ®istry, &identity).await; |
| 2245 | flush_later(&env, &ctx); |
| 2246 | handled |
| 2247 | } |
| 2248 | |
| 2249 | async fn handle_events(batch: &MessageBatch<Event>, env: &Env, registry: &Registry, identity: &Fetcher) -> Result<()> { |
| 2250 | for message in batch.messages()? { |
| 2251 | let event = message.body(); |
| 2252 | // A pull request merged, closed or reopened: its working copy is |
| 2253 | // kept or let go (forks.rs). |
| 2254 | if let Some(change) = forks::pull_change(&event.kind) { |
| 2255 | let Some(pull_id) = forks::pull_id_of(&event.data) else { |
| 2256 | worker::console_error!("{} {} names no pull request", event.kind, event.id); |
| 2257 | continue; |
| 2258 | }; |
| 2259 | let repos = service(env)?; |
| 2260 | match change { |
| 2261 | forks::PullChange::Settled => repos.pull_settled(&pull_id).await?, |
| 2262 | forks::PullChange::Reopened => repos.pull_reopened(&pull_id).await?, |
| 2263 | } |
| 2264 | continue; |
| 2265 | } |
| 2266 | // A workspace deleted, restored or purged: its repositories go with |
| 2267 | // it, come back with it, or are purged with it (lifecycle.rs). |
| 2268 | if event.kind == "workspace.deleting" { |
| 2269 | match serde_json::from_value::<WorkspaceDeleting>(event.data.clone()) { |
| 2270 | Ok(deleting) => service(env)?.delete_with_workspace(&deleting, &protected_workspaces(env)).await?, |
| 2271 | Err(_) => worker::console_error!("workspace.deleting {} could not be read", event.id), |
| 2272 | } |
| 2273 | continue; |
| 2274 | } |
| 2275 | if event.kind == "workspace.restored" { |
| 2276 | match serde_json::from_value::<WorkspaceRestored>(event.data.clone()) { |
| 2277 | Ok(restored) => service(env)?.restore_with_workspace(&restored).await?, |
| 2278 | Err(_) => worker::console_error!("workspace.restored {} could not be read", event.id), |
| 2279 | } |
| 2280 | continue; |
| 2281 | } |
| 2282 | if event.kind == "workspace.deleted" { |
| 2283 | match serde_json::from_value::<WorkspaceDeleted>(event.data.clone()) { |
| 2284 | Ok(deleted) => service(env)?.purge_workspace(&deleted, &protected_workspaces(env)).await?, |
| 2285 | Err(_) => worker::console_error!("workspace.deleted {} could not be read", event.id), |
| 2286 | } |
| 2287 | continue; |
| 2288 | } |
| 2289 | if event.kind != "workspace.renamed" { |
| 2290 | continue; |
| 2291 | } |
| 2292 | let Ok(renamed) = serde_json::from_value::<WorkspaceRenamed>(event.data.clone()) else { |
| 2293 | worker::console_error!("workspace.renamed {} could not be read", event.id); |
| 2294 | continue; |
| 2295 | }; |
| 2296 | let names: HashMap<String, String> = g1t_kit::call( |
| 2297 | identity, |
| 2298 | "usernames", |
| 2299 | &g1t_contracts::identity::UsernamesArgs { |
| 2300 | ids: vec![renamed.workspace_id.clone()], |
| 2301 | }, |
| 2302 | ) |
| 2303 | .await?; |
| 2304 | let current = names |
| 2305 | .get(&renamed.workspace_id) |
| 2306 | .cloned() |
| 2307 | .unwrap_or_else(|| renamed.to.clone()); |
| 2308 | let left = registry |
| 2309 | .rename_namespace(&renamed.stale_slugs(¤t), ¤t) |
| 2310 | .await?; |
| 2311 | if left > 0 { |
| 2312 | worker::console_error!( |
| 2313 | "{left} repositories stayed under {} or {}: {current} already has repositories of the same names", |
| 2314 | renamed.from, |
| 2315 | renamed.to |
| 2316 | ); |
| 2317 | } |
| 2318 | } |
| 2319 | Ok(()) |
| 2320 | } |
| 2321 | |
| 2322 | /// The workspaces whose repositories never go with a deletion, whatever is |
| 2323 | /// published: `PROTECTED_WORKSPACES` if set here, and Flagon's always. |
| 2324 | fn protected_workspaces(env: &Env) -> Vec<String> { |
| 2325 | let configured = env.var("PROTECTED_WORKSPACES").ok().map(|v| v.to_string()); |
| 2326 | g1t_contracts::identity::protected_names(configured.as_deref()) |
| 2327 | } |
| 2328 | |
| 2329 | /// The repository a push to a path that does not exist yet creates: private, |
| 2330 | /// so nothing pushed by mistake is published. An owner makes it public on |
| 2331 | /// purpose (`POST /repos/{owner}/{repo}/visibility`). |
| 2332 | fn push_to_create(owner: &User, path: &RepoPath) -> CreateArgs { |
| 2333 | CreateArgs { |
| 2334 | owner: owner.clone(), |
| 2335 | namespace: path.namespace.clone(), |
| 2336 | name: path.name.clone(), |
| 2337 | description: None, |
| 2338 | is_private: true, |
| 2339 | import_url: None, |
| 2340 | import_token: None, |
| 2341 | } |
| 2342 | } |
| 2343 | |
| 2344 | #[cfg(test)] |
| 2345 | mod push_to_create_tests { |
| 2346 | use super::*; |
| 2347 | |
| 2348 | #[test] |
| 2349 | fn a_pushed_repository_starts_private() { |
| 2350 | let owner: User = serde_json::from_value(serde_json::json!({ "id": "usr_1", "username": "ada" })).unwrap(); |
| 2351 | let args = push_to_create(&owner, &RepoPath { namespace: "acme".into(), name: "site".into() }); |
| 2352 | assert!(args.is_private); |
| 2353 | assert_eq!((args.namespace.as_str(), args.name.as_str()), ("acme", "site")); |
| 2354 | } |
| 2355 | } |