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GitHub Actions on g1t, part two: running workflows1//! The actions service: a repository's GitHub Actions workflows, run on
2//! g1t as they are. See `g1t_contracts::actions` for the methods and
3//! `g1t_actions` for how workflows, expressions and filters are read.
4//!
5//! - [`sync`] reads workflow files, at the default branch for the list and
6//! at an event's own commit for its runs.
7//! - [`trigger`] turns events, schedules and manual runs into runs.
8//! - [`plan`] moves a run's jobs along: each waits for the jobs it needs,
9//! is skipped or expanded into its matrix, queued, started in a sandbox
10//! when the workspace has room, and finished by the sandbox's report.
11//! - [`payload`] builds the webhook-shaped `github.event`.
12//! - [`settings`] keeps secrets and variables.
Merge branch 'worktree-agent-a3abfcce648e87dca'13//! - [`protection`] keeps a repository's workflow settings and its
14//! environments' protection rules, holds jobs at those rules until they
15//! pass, and lets pull requests' runs from outside wait for approval.
Fast pages, required checks on the branch, self-hosted runners, honest incidents16//! - [`cache`] lists `actions/cache` entries, which the API keeps in R2.
17//! - [`runners`] keeps self-hosted runners, hands them jobs (and agent
18//! work from the runner service) when they ask, and hears back.
GitHub Actions on g1t, part two: running workflows19//!
20//! The service acts as the repository's workspace: it reads what the
Merge branch 'worktree-agent-a3abfcce648e87dca'21//! workspace can read, and a job's `GITHUB_TOKEN` is a token of the
22//! workspace's that reaches the job's repository only, with the scopes its
23//! `permissions:` give it, revoked when the job ends.
GitHub Actions on g1t, part two: running workflows24
Actions: OIDC tokens, the toolkit's cache and artifact services, and artifacts in R225mod artifacts;
Fast pages, required checks on the branch, self-hosted runners, honest incidents26mod cache;
GitHub Actions on g1t, part two: running workflows27mod payload;
28mod plan;
Merge branch 'worktree-agent-a3abfcce648e87dca'29mod protection;
Agents and memory, checks and conflicts, profiles, slug renames, custom domains30mod rename;
Actions: OIDC tokens, the toolkit's cache and artifact services, and artifacts in R231pub mod runtime;
Fast pages, required checks on the branch, self-hosted runners, honest incidents32mod runners;
GitHub Actions on g1t, part two: running workflows33mod settings;
34mod sync;
35mod trigger;
36mod views;
37
Invite-only launch: sign in with GitHub, repository access and lifecycle, many emails, a new look38use g1t_contracts::access::{self, Capability};
GitHub Actions on g1t, part two: running workflows39use g1t_contracts::events::Event;
40use g1t_contracts::identity::{SlugArgs, Workspace};
41use g1t_contracts::repos::{GetArgs, GetByIdArgs, Repo, RepoPath};
Workspace names and icons, and a component kit for every control42use g1t_contracts::{FailureCode, Membership, Outcome, PrincipalKind, User, Viewer};
GitHub Actions on g1t, part two: running workflows43use g1t_kit::{args, reply, rpc_method};
44use g1t_secrets::Sealer;
45use serde::Deserialize;
46use serde_json::Value;
47use worker::wasm_bindgen::JsValue;
48use worker::{Context, D1Database, Env, Fetcher, MessageBatch, MessageExt, Request, Response, Result, ScheduleContext, ScheduledEvent, event};
49
50/// The most workflow files read from a repository.
51pub const MAX_WORKFLOWS: usize = 50;
52/// Jobs one workspace may have running at once; the rest wait their turn.
53pub const RUNNING_PER_WORKSPACE: u32 = 4;
54/// The longest a job may run, whatever its `timeout-minutes`.
55pub const MAX_TIMEOUT_MINUTES: u32 = 60;
Fast pages, required checks on the branch, self-hosted runners, honest incidents56/// The longest a job on a self-hosted runner may run: the machine is the
57/// workspace's own, and its time costs nothing.
58pub const SELF_HOSTED_MAX_TIMEOUT_MINUTES: u32 = 24 * 60;
GitHub Actions on g1t, part two: running workflows59/// A running job that has said nothing for this long is taken as lost.
60pub const SILENT_MS: u64 = 10 * 60 * 1000;
61pub const SITE: &str = "https://g1t.sh";
62pub const API: &str = "https://api.g1t.sh";
63
64#[derive(Deserialize)]
65struct Count {
66 n: u32,
67}
68
69pub fn optional(value: Option<&str>) -> JsValue {
70 value.map_or(JsValue::NULL, JsValue::from)
71}
72
73pub fn fail<T>(code: FailureCode, message: impl Into<String>) -> Outcome<T> {
74 Outcome::fail(code, message)
75}
76
77/// `owner/name` as a path.
78pub fn repo_path(full_name: &str) -> RepoPath {
79 let (namespace, name) = full_name.split_once('/').unwrap_or((full_name, ""));
80 RepoPath {
81 namespace: namespace.to_owned(),
82 name: name.to_owned(),
83 }
84}
85
86pub struct Actions {
87 db: D1Database,
88 repos: Fetcher,
89 work: Fetcher,
90 identity: Fetcher,
91 runner: Fetcher,
Actions: workflow_run, workflow.completed, artifacts on the run page, Node 2492 events: Fetcher,
Projects: what a workspace builds and runs, first on every page93 /// Projects: a repository's secrets and variables belong to its project.
94 projects: Fetcher,
Fast pages, required checks on the branch, self-hosted runners, honest incidents95 /// Billing: self-hosted runners' time, recorded at $0, and the
96 /// cache's storage.
97 billing: Fetcher,
Merge branch 'main' into worktree-agent-a69aeabc4b0deeb9798 /// Deployments: a job with an `environment:` deploys to it, and its
99 /// run's deployment is recorded there (plan.rs `report_deployment`).
100 deployments: Fetcher,
Fast pages, required checks on the branch, self-hosted runners, honest incidents101 /// Where the API keeps cache entries, for deleting evicted ones.
102 cache: Option<worker::Bucket>,
GitHub Actions on g1t, part two: running workflows103 /// Seals secrets; absent until `ACTIONS_KEY` is set, when secrets
104 /// cannot be saved.
105 sealer: Option<Sealer>,
Actions: OIDC tokens, the toolkit's cache and artifact services, and artifacts in R2106 /// Signs the toolkit's blob links (runtime.rs), from `ACTIONS_KEY`.
107 blob_key: Option<String>,
GitHub Actions on g1t, part two: running workflows108}
109
110impl Actions {
111 fn new(env: &Env) -> Result<Self> {
112 Ok(Actions {
113 db: env.d1("DB")?,
114 repos: env.service("REPOS")?,
115 work: env.service("WORK")?,
116 identity: env.service("IDENTITY")?,
117 runner: env.service("RUNNER")?,
Actions: workflow_run, workflow.completed, artifacts on the run page, Node 24118 events: env.service("EVENTS")?,
Projects: what a workspace builds and runs, first on every page119 projects: env.service("PROJECTS")?,
Fast pages, required checks on the branch, self-hosted runners, honest incidents120 billing: env.service("BILLING")?,
Merge branch 'main' into worktree-agent-a69aeabc4b0deeb97121 deployments: env.service("DEPLOYMENTS")?,
Fast pages, required checks on the branch, self-hosted runners, honest incidents122 cache: env.bucket("ACTIONS_CACHE").ok(),
GitHub Actions on g1t, part two: running workflows123 sealer: env.secret("ACTIONS_KEY").ok().and_then(|key| Sealer::new(&key.to_string())),
Actions: OIDC tokens, the toolkit's cache and artifact services, and artifacts in R2124 blob_key: env.secret("ACTIONS_KEY").ok().map(|key| runtime::blob_key(&key.to_string())),
GitHub Actions on g1t, part two: running workflows125 })
126 }
127
128 /// The workspace itself, as the service acts.
129 async fn workspace_actor(&self, slug: &str) -> Result<Option<User>> {
130 let workspace: Option<Workspace> = g1t_kit::call(&self.identity, "get_workspace", &SlugArgs { slug: slug.to_owned() }).await?;
131 Ok(workspace.map(|workspace| User {
132 id: workspace.id,
133 username: workspace.slug.clone(),
134 kind: PrincipalKind::Workspace,
135 verified: true,
Workspace names and icons, and a component kit for every control136 workspaces: vec![Membership::member(workspace.slug)],
137 ..User::default()
GitHub Actions on g1t, part two: running workflows138 }))
139 }
140
141 /// The repository, if the viewer may see it and it is not a pull
142 /// request's working copy.
143 async fn visible_repo(&self, path: &RepoPath, viewer: &Viewer) -> Result<Option<Repo>> {
144 let found: Outcome<Repo> = g1t_kit::call(
145 &self.repos,
146 "get",
147 &GetArgs {
148 path: path.clone(),
149 viewer: viewer.clone(),
150 },
151 )
152 .await?;
153 Ok(found.into_result().ok().filter(|repo| repo.fork_of.is_none()))
154 }
155
156 /// A repository by id, as its workspace sees it.
157 async fn repo_by_id(&self, id: &str) -> Result<Option<(Repo, User)>> {
158 let path: Option<RepoPath> = g1t_kit::call(&self.repos, "path_by_id", &g1t_contracts::repos::PathByIdArgs { id: id.to_owned() }).await?;
159 let Some(path) = path else { return Ok(None) };
160 let Some(actor) = self.workspace_actor(&path.namespace).await? else {
161 return Ok(None);
162 };
163 let found: Outcome<Repo> = g1t_kit::call(
164 &self.repos,
165 "get_by_id",
166 &GetByIdArgs {
167 id: id.to_owned(),
168 viewer: Some(actor.clone()),
169 },
170 )
171 .await?;
172 Ok(found.into_result().ok().filter(|repo| repo.fork_of.is_none()).map(|repo| (repo, actor)))
173 }
174
Invite-only launch: sign in with GitHub, repository access and lifecycle, many emails, a new look175 /// The repository at `path`, when `actor` may do `capability` in it:
176 /// not found when they cannot read it, forbidden when their role falls
177 /// short. Agents never may: people and tokens run and change workflows.
178 async fn may(&self, actor: &User, path: &RepoPath, capability: Capability) -> Result<Outcome<Repo>> {
179 if actor.kind == PrincipalKind::Agent {
180 return Ok(fail(FailureCode::Forbidden, "An agent cannot do that. Ask a person."));
181 }
182 let Some(repo) = self.visible_repo(path, &Some(actor.clone())).await? else {
183 return Ok(fail(FailureCode::NotFound, "There is no such repository."));
184 };
185 if !access::can(Some(actor), &repo, capability) {
186 return Ok(fail(
187 FailureCode::Forbidden,
188 access::needs(capability, &format!("{}/{}", repo.namespace, repo.name)),
189 ));
190 }
191 Ok(Outcome::Ok(repo))
GitHub Actions on g1t, part two: running workflows192 }
193}
194
195/// Unwraps an `Outcome`, or returns its failure from the enclosing method.
196#[macro_export]
197macro_rules! check {
198 ($outcome:expr) => {
199 match $outcome {
200 g1t_contracts::Outcome::Ok(value) => value,
201 g1t_contracts::Outcome::Fail(refused) => return Ok(g1t_contracts::Outcome::Fail(refused)),
202 }
203 };
204}
205
206#[event(fetch)]
207async fn fetch(mut request: Request, env: Env, _ctx: Context) -> Result<Response> {
208 let Some(method) = rpc_method(&request) else {
209 return Response::error("Not found", 404);
210 };
211 let body: Value = request.json().await?;
212 let service = Actions::new(&env)?;
213 match method.as_str() {
214 "workflows" => reply(&service.workflows(args(body)?).await?),
215 "runs" => reply(&service.runs(args(body)?).await?),
216 "run" => reply(&service.run(args(body)?).await?),
217 "logs" => reply(&service.logs(args(body)?).await?),
218 "dispatch" => reply(&service.dispatch(args(body)?).await?),
Merge branch 'worktree-agent-a3abfcce648e87dca'219 "repository_dispatch" => reply(&service.repository_dispatch(args(body)?).await?),
220 "approve_run" => reply(&service.approve_run(args(body)?).await?),
221 "pending_deployments" => reply(&service.pending_deployments(args(body)?).await?),
222 "review_deployments" => reply(&service.review_deployments(args(body)?).await?),
223 "actions_settings" => reply(&service.actions_settings(args(body)?).await?),
224 "set_actions_settings" => reply(&service.set_actions_settings(args(body)?).await?),
225 "workspace_actions_settings" => reply(&service.workspace_actions_settings(args(body)?).await?),
226 "set_workspace_actions_settings" => reply(&service.set_workspace_actions_settings(args(body)?).await?),
227 "environments" => reply(&service.environments(args(body)?).await?),
228 "set_environment" => reply(&service.set_environment(args(body)?).await?),
229 "delete_environment" => reply(&service.delete_environment(args(body)?).await?),
Sidebar: the panels really slide230 "merge_group" => reply(&service.merge_group(args(body)?).await?),
GitHub Actions on g1t, part two: running workflows231 "cancel" => reply(&service.cancel(args(body)?).await?),
232 "rerun" => reply(&service.rerun(args(body)?).await?),
233 "set_workflow_enabled" => reply(&service.set_workflow_enabled(args(body)?).await?),
234 "settings" => reply(&service.settings(args(body)?).await?),
235 "set_setting" => reply(&service.set_setting(args(body)?).await?),
236 "delete_setting" => reply(&service.delete_setting(args(body)?).await?),
Secrets and variables: one list, rows per environment, for workflows and deployments237 "resolve_settings" => reply(&service.resolve_settings(args(body)?).await?),
GitHub Actions on g1t, part two: running workflows238 "job_spec" => reply(&service.job_spec(args(body)?).await?),
A repository has its own sidebar, as settings do239 "job_auth" => reply(&service.job_auth(args(body)?).await?),
Merge checks: statuses and check runs on every commit240 "check_runs" => reply(&service.check_runs(args(body)?).await?),
GitHub Actions on g1t, part two: running workflows241 "job_report" => reply(&service.job_report(args(body)?).await?),
Fast pages, required checks on the branch, self-hosted runners, honest incidents242 // actions/cache, through the API with the job's token.
243 "cache_lookup" => reply(&service.cache_lookup(args(body)?).await?),
244 "cache_reserve" => reply(&service.cache_reserve(args(body)?).await?),
245 "cache_commit" => reply(&service.cache_commit(args(body)?).await?),
246 "cache_abort" => reply(&service.cache_abort(args(body)?).await?),
Actions: OIDC tokens, the toolkit's cache and artifact services, and artifacts in R2247 "cache_upload" => reply(&service.cache_upload(args(body)?).await?),
248 // Artifacts: a job's side, with its token or its runtime token.
249 "artifact_reserve" => reply(&service.artifact_reserve(args(body)?).await?),
250 "artifact_commit" => reply(&service.artifact_commit(args(body)?).await?),
251 "artifact_abort" => reply(&service.artifact_abort(args(body)?).await?),
252 "job_artifacts" => reply(&service.job_artifacts(args(body)?).await?),
253 "job_artifact" => reply(&service.job_artifact(args(body)?).await?),
254 "job_delete_artifact" => reply(&service.job_delete_artifact(args(body)?).await?),
255 // Artifacts: people's side.
256 "artifacts" => reply(&service.artifacts(args(body)?).await?),
257 "artifact" => reply(&service.artifact(args(body)?).await?),
258 "artifact_download" => reply(&service.artifact_download(args(body)?).await?),
259 "delete_artifact" => reply(&service.delete_artifact(args(body)?).await?),
260 "artifact_retention" => reply(&service.artifact_retention(args(body)?).await?),
261 // The toolkit's protocols: the runtime token, OIDC, blob links.
262 "runtime_auth" => reply(&service.runtime_auth(args(body)?).await?),
263 "oidc_claims" => reply(&service.oidc_claims(args(body)?).await?),
264 "blob_sign" => reply(&service.blob_sign(args(body)?).await?),
265 "blob_open" => reply(&service.blob_open(args(body)?).await?),
266 "blob_part" => reply(&service.blob_part(args(body)?).await?),
267 "blob_parts" => reply(&service.blob_parts(args(body)?).await?),
268 "blob_done" => reply(&service.blob_done(args(body)?).await?),
Fast pages, required checks on the branch, self-hosted runners, honest incidents269 // Self-hosted runners: people's side.
270 "runners" => reply(&service.runners(args(body)?).await?),
271 "create_registration_token" => reply(&service.create_registration_token(args(body)?).await?),
272 "remove_runner" => reply(&service.remove_runner(args(body)?).await?),
273 "runner_groups" => reply(&service.runner_groups(args(body)?).await?),
274 "set_runner_group" => reply(&service.set_runner_group(args(body)?).await?),
275 "delete_runner_group" => reply(&service.delete_runner_group(args(body)?).await?),
276 "runner_settings" => reply(&service.runner_settings(args(body)?).await?),
277 "set_runner_settings" => reply(&service.set_runner_settings(args(body)?).await?),
278 // The runner's own side, through the API with its credential.
279 "runner_register" => reply(&service.runner_register(args(body)?).await?),
280 "runner_poll" => reply(&service.runner_poll(args(body)?).await?),
281 "runner_finished" => reply(&service.runner_finished(args(body)?).await?),
282 "runner_remove_self" => reply(&service.runner_remove_self(args(body)?).await?),
283 // Agent work, from the runner service.
284 "runner_route" => reply(&service.runner_route(args(body)?).await?),
285 "stuck_jobs" => reply(&service.stuck_jobs(args(body)?).await?),
286 "enqueue_task" => reply(&service.enqueue_task(args(body)?).await?),
287 "cancel_task" => reply(&service.cancel_task(args(body)?).await?),
GitHub Actions on g1t, part two: running workflows288 _ => Response::error("Unknown method", 404),
289 }
290}
291
292/// Events from the bus, on this service's own queue.
293#[event(queue)]
294async fn queue(batch: MessageBatch<Event>, env: Env, _ctx: Context) -> Result<()> {
295 let service = Actions::new(&env)?;
296 for message in batch.messages()? {
Agents and memory, checks and conflicts, profiles, slug renames, custom domains297 // A workspace renamed: its rows move to the slug it has now.
298 if g1t_kit::rename::on_event(&env, &env.d1("DB")?, message.body(), rename::STATEMENTS).await? {
299 message.ack();
300 continue;
301 }
Invite-only launch: sign in with GitHub, repository access and lifecycle, many emails, a new look302 // A repository renamed or transferred: its rows follow its new path.
303 if g1t_kit::transfer::on_event(&env, &env.d1("DB")?, message.body(), rename::TRANSFERRED).await? {
304 message.ack();
305 continue;
306 }
307 // A workspace deleted: what it kept for itself goes.
308 if g1t_kit::deleted::on_event(&env.d1("DB")?, message.body(), rename::DELETED).await? {
309 message.ack();
310 continue;
311 }
312 // A repository purged: every row kept for it goes.
313 if g1t_kit::lifecycle::on_purged(&env.d1("DB")?, message.body(), rename::PURGED).await? {
314 message.ack();
315 continue;
316 }
317 // A repository deleted or archived: its runs stop.
318 if let Some(repo_id) = plan::stops_runs(message.body()) {
319 if let Err(error) = service.stop_runs(&repo_id).await {
320 worker::console_error!("actions: event {} failed: {error}", message.body().id);
321 message.retry();
322 continue;
323 }
324 message.ack();
325 continue;
326 }
GitHub Actions on g1t, part two: running workflows327 if let Err(error) = service.on_event(message.body()).await {
328 worker::console_error!("actions: event {} failed: {error}", message.body().id);
329 message.retry();
330 continue;
331 }
332 message.ack();
333 }
334 Ok(())
335}
336
337/// Every minute: schedules that fire, jobs waiting for room, and jobs
338/// whose sandbox went quiet.
339#[event(scheduled)]
340async fn scheduled(_event: ScheduledEvent, env: Env, _ctx: ScheduleContext) {
341 match Actions::new(&env) {
342 Ok(service) => {
343 if let Err(error) = service.on_minute(g1t_kit::now_ms()).await {
344 worker::console_error!("actions: the sweep failed: {error}");
345 }
346 }
347 Err(error) => worker::console_error!("actions: could not start: {error}"),
348 }
349}

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