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g1t/services/actions/src/lib.rs

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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.
13//!
14//! The service acts as the repository's workspace: it reads what the
15//! workspace can read, and a job's `GITHUB_TOKEN` is a short-lived token of
16//! the workspace's.
17
18mod payload;
19mod plan;
20mod settings;
21mod sync;
22mod trigger;
23mod views;
24
25use g1t_contracts::events::Event;
26use g1t_contracts::identity::{SlugArgs, Workspace};
27use g1t_contracts::repos::{GetArgs, GetByIdArgs, Repo, RepoPath};
Workspace names and icons, and a component kit for every control28use g1t_contracts::{FailureCode, Membership, Outcome, PrincipalKind, User, Viewer};
GitHub Actions on g1t, part two: running workflows29use g1t_kit::{args, reply, rpc_method};
30use g1t_secrets::Sealer;
31use serde::Deserialize;
32use serde_json::Value;
33use worker::wasm_bindgen::JsValue;
34use worker::{Context, D1Database, Env, Fetcher, MessageBatch, MessageExt, Request, Response, Result, ScheduleContext, ScheduledEvent, event};
35
36/// The most workflow files read from a repository.
37pub const MAX_WORKFLOWS: usize = 50;
38/// Jobs one workspace may have running at once; the rest wait their turn.
39pub const RUNNING_PER_WORKSPACE: u32 = 4;
40/// The longest a job may run, whatever its `timeout-minutes`.
41pub const MAX_TIMEOUT_MINUTES: u32 = 60;
42/// A running job that has said nothing for this long is taken as lost.
43pub const SILENT_MS: u64 = 10 * 60 * 1000;
44pub const SITE: &str = "https://g1t.sh";
45pub const API: &str = "https://api.g1t.sh";
46
47#[derive(Deserialize)]
48struct Count {
49 n: u32,
50}
51
52pub fn optional(value: Option<&str>) -> JsValue {
53 value.map_or(JsValue::NULL, JsValue::from)
54}
55
56pub fn fail<T>(code: FailureCode, message: impl Into<String>) -> Outcome<T> {
57 Outcome::fail(code, message)
58}
59
60/// `owner/name` as a path.
61pub fn repo_path(full_name: &str) -> RepoPath {
62 let (namespace, name) = full_name.split_once('/').unwrap_or((full_name, ""));
63 RepoPath {
64 namespace: namespace.to_owned(),
65 name: name.to_owned(),
66 }
67}
68
69pub struct Actions {
70 db: D1Database,
71 repos: Fetcher,
72 work: Fetcher,
73 identity: Fetcher,
74 runner: Fetcher,
Actions: workflow_run, workflow.completed, artifacts on the run page, Node 2475 events: Fetcher,
Projects: what a workspace builds and runs, first on every page76 /// Projects: a repository's secrets and variables belong to its project.
77 projects: Fetcher,
GitHub Actions on g1t, part two: running workflows78 /// Seals secrets; absent until `ACTIONS_KEY` is set, when secrets
79 /// cannot be saved.
80 sealer: Option<Sealer>,
81}
82
83impl Actions {
84 fn new(env: &Env) -> Result<Self> {
85 Ok(Actions {
86 db: env.d1("DB")?,
87 repos: env.service("REPOS")?,
88 work: env.service("WORK")?,
89 identity: env.service("IDENTITY")?,
90 runner: env.service("RUNNER")?,
Actions: workflow_run, workflow.completed, artifacts on the run page, Node 2491 events: env.service("EVENTS")?,
Projects: what a workspace builds and runs, first on every page92 projects: env.service("PROJECTS")?,
GitHub Actions on g1t, part two: running workflows93 sealer: env.secret("ACTIONS_KEY").ok().and_then(|key| Sealer::new(&key.to_string())),
94 })
95 }
96
97 /// The workspace itself, as the service acts.
98 async fn workspace_actor(&self, slug: &str) -> Result<Option<User>> {
99 let workspace: Option<Workspace> = g1t_kit::call(&self.identity, "get_workspace", &SlugArgs { slug: slug.to_owned() }).await?;
100 Ok(workspace.map(|workspace| User {
101 id: workspace.id,
102 username: workspace.slug.clone(),
103 kind: PrincipalKind::Workspace,
104 verified: true,
Workspace names and icons, and a component kit for every control105 workspaces: vec![Membership::member(workspace.slug)],
106 ..User::default()
GitHub Actions on g1t, part two: running workflows107 }))
108 }
109
110 /// The repository, if the viewer may see it and it is not a pull
111 /// request's working copy.
112 async fn visible_repo(&self, path: &RepoPath, viewer: &Viewer) -> Result<Option<Repo>> {
113 let found: Outcome<Repo> = g1t_kit::call(
114 &self.repos,
115 "get",
116 &GetArgs {
117 path: path.clone(),
118 viewer: viewer.clone(),
119 },
120 )
121 .await?;
122 Ok(found.into_result().ok().filter(|repo| repo.fork_of.is_none()))
123 }
124
125 /// A repository by id, as its workspace sees it.
126 async fn repo_by_id(&self, id: &str) -> Result<Option<(Repo, User)>> {
127 let path: Option<RepoPath> = g1t_kit::call(&self.repos, "path_by_id", &g1t_contracts::repos::PathByIdArgs { id: id.to_owned() }).await?;
128 let Some(path) = path else { return Ok(None) };
129 let Some(actor) = self.workspace_actor(&path.namespace).await? else {
130 return Ok(None);
131 };
132 let found: Outcome<Repo> = g1t_kit::call(
133 &self.repos,
134 "get_by_id",
135 &GetByIdArgs {
136 id: id.to_owned(),
137 viewer: Some(actor.clone()),
138 },
139 )
140 .await?;
141 Ok(found.into_result().ok().filter(|repo| repo.fork_of.is_none()).map(|repo| (repo, actor)))
142 }
143
144 /// Refuses anyone but a member of the repository's workspace.
145 fn member(actor: &User, repo: &RepoPath) -> Option<Outcome<()>> {
146 (actor.kind == PrincipalKind::Agent || !actor.is_member(&repo.namespace.to_lowercase()))
147 .then(|| fail(FailureCode::Forbidden, format!("Only members of {} can do that.", repo.namespace)))
148 }
149}
150
151/// Unwraps an `Outcome`, or returns its failure from the enclosing method.
152#[macro_export]
153macro_rules! check {
154 ($outcome:expr) => {
155 match $outcome {
156 g1t_contracts::Outcome::Ok(value) => value,
157 g1t_contracts::Outcome::Fail(refused) => return Ok(g1t_contracts::Outcome::Fail(refused)),
158 }
159 };
160}
161
162#[event(fetch)]
163async fn fetch(mut request: Request, env: Env, _ctx: Context) -> Result<Response> {
164 let Some(method) = rpc_method(&request) else {
165 return Response::error("Not found", 404);
166 };
167 let body: Value = request.json().await?;
168 let service = Actions::new(&env)?;
169 match method.as_str() {
170 "workflows" => reply(&service.workflows(args(body)?).await?),
171 "runs" => reply(&service.runs(args(body)?).await?),
172 "run" => reply(&service.run(args(body)?).await?),
173 "logs" => reply(&service.logs(args(body)?).await?),
174 "dispatch" => reply(&service.dispatch(args(body)?).await?),
Sidebar: the panels really slide175 "merge_group" => reply(&service.merge_group(args(body)?).await?),
GitHub Actions on g1t, part two: running workflows176 "cancel" => reply(&service.cancel(args(body)?).await?),
177 "rerun" => reply(&service.rerun(args(body)?).await?),
178 "set_workflow_enabled" => reply(&service.set_workflow_enabled(args(body)?).await?),
179 "settings" => reply(&service.settings(args(body)?).await?),
180 "set_setting" => reply(&service.set_setting(args(body)?).await?),
181 "delete_setting" => reply(&service.delete_setting(args(body)?).await?),
Secrets and variables: one list, rows per environment, for workflows and deployments182 "resolve_settings" => reply(&service.resolve_settings(args(body)?).await?),
GitHub Actions on g1t, part two: running workflows183 "job_spec" => reply(&service.job_spec(args(body)?).await?),
A repository has its own sidebar, as settings do184 "job_auth" => reply(&service.job_auth(args(body)?).await?),
GitHub Actions on g1t, part two: running workflows185 "job_report" => reply(&service.job_report(args(body)?).await?),
186 _ => Response::error("Unknown method", 404),
187 }
188}
189
190/// Events from the bus, on this service's own queue.
191#[event(queue)]
192async fn queue(batch: MessageBatch<Event>, env: Env, _ctx: Context) -> Result<()> {
193 let service = Actions::new(&env)?;
194 for message in batch.messages()? {
195 if let Err(error) = service.on_event(message.body()).await {
196 worker::console_error!("actions: event {} failed: {error}", message.body().id);
197 message.retry();
198 continue;
199 }
200 message.ack();
201 }
202 Ok(())
203}
204
205/// Every minute: schedules that fire, jobs waiting for room, and jobs
206/// whose sandbox went quiet.
207#[event(scheduled)]
208async fn scheduled(_event: ScheduledEvent, env: Env, _ctx: ScheduleContext) {
209 match Actions::new(&env) {
210 Ok(service) => {
211 if let Err(error) = service.on_minute(g1t_kit::now_ms()).await {
212 worker::console_error!("actions: the sweep failed: {error}");
213 }
214 }
215 Err(error) => worker::console_error!("actions: could not start: {error}"),
216 }
217}