OXYGENHUB
# 0ee5c3fb32eb oxygenhub / crates / hub / src / web / flow.rs
42.5 KiB · Rust · last changed Approvals through an agent token say so (closes #229) 18 days ago source blame history raw
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//! The Flow tab (hub spec §13.2): runs of a repository, and a run's job
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//! graph with live status and logs.
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use super::settings::{csrf, require};
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use super::{filters, lookup, lookup_role, Error, Page, RepoShell, Shell};
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use crate::auth::{Access, Role, Viewer};
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use crate::db::{self, flow as fdb};
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use crate::Shared;
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use askama::Template;
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use axum::extract::{Form, Path, Query, State};
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use axum::response::{IntoResponse, Redirect, Response};
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use axum::Json;
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use serde::Deserialize;
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pub struct RunRow {
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    pub r: fdb::Run,
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    pub duration: String,
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    pub jobs: Vec<(String, String)>,
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    /// "3rd in line" for a run still waiting for a runner.
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    pub place: Option<String>,
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}
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#[derive(Template)]
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#[template(path = "flow_runs.html")]
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pub struct RunsPage {
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    shell: Shell,
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    repo: RepoShell,
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    runs: Vec<RunRow>,
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    enabled: bool,
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    older: Option<i64>,
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    /// Writers may start runs: the bookmarks to offer, default first.
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    can_run: bool,
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    bookmarks: Vec<String>,
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    error: Option<String>,
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    /// Why this viewer is not offered "Run pipeline", when they are not.
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    why_not: Option<String>,
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}
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#[derive(Deserialize)]
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pub struct RunsQuery {
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    before: Option<i64>,
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    /// Why a "Run pipeline" or "Re-run" did not start.
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    error: Option<String>,
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}
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/// Why `viewer` may not start runs here, or `None` when they may.
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pub fn why_not_run(enabled: bool, signed_in: bool, role: Role) -> Option<String> {
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    if !enabled {
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        Some("Flow is off for this repository; a site administrator can turn it on in Settings → Flow.".into())
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    } else if !signed_in {
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        Some("Sign in with write access to run the pipeline.".into())
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    } else if role < Role::Write {
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        Some("Running the pipeline needs write access to this repository.".into())
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    } else {
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        None
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    }
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}
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const PER_PAGE: i64 = 30;
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#[derive(Template)]
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#[template(path = "deployments.html")]
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pub struct DeploymentsPage {
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    shell: Shell,
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    repo: RepoShell,
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    /// Each environment's newest deployment, by name.
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    current: Vec<fdb::Deployment>,
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    /// Every recent deployment, newest first.
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    history: Vec<fdb::Deployment>,
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}
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/// `GET /{owner}/{name}/deployments`: what each environment runs
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/// (oxygenflow#59).
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pub async fn deployments(
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    State(app): State<Shared>,
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    viewer: Viewer,
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    Path((owner, name)): Path<(String, String)>,
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) -> Result<Page<DeploymentsPage>, Error> {
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    let shell = Shell::new(&app, &format!("/{owner}/{name}/deployments"), &viewer);
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    let (_repo, row, role) = lookup(&app, &shell, &viewer, &owner, &name).await?;
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    let history = fdb::deployments(&app.db, row.id, 50).await.map_err(|e| Error::from_db(shell.clone(), e))?;
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    let mut current: Vec<fdb::Deployment> = Vec::new();
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    for d in &history {
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        if !current.iter().any(|c| c.environment == d.environment) {
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            current.push(d.clone());
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        }
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    }
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    current.sort_by(|a, b| a.environment.cmp(&b.environment));
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    Ok(Page(DeploymentsPage { shell, repo: RepoShell::new(&app, &row, "flow").with_role(role), current, history }))
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}
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pub async fn runs(
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    State(app): State<Shared>,
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    viewer: Viewer,
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    Path((owner, name)): Path<(String, String)>,
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    Query(q): Query<RunsQuery>,
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) -> Result<Page<RunsPage>, Error> {
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    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow"), &viewer);
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    let (_repo, row, role) = lookup(&app, &shell, &viewer, &owner, &name).await?;
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    let list = fdb::runs(&app.db, row.id, PER_PAGE + 1, q.before).await.map_err(|e| Error::from_db(shell.clone(), e))?;
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    let older = (list.len() as i64 > PER_PAGE).then(|| list[PER_PAGE as usize - 1].id);
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    let queue = if list.iter().any(|r| r.live()) { fdb::queue(&app.db).await.unwrap_or_default() } else { vec![] };
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    let mut runs = Vec::new();
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    for r in list.into_iter().take(PER_PAGE as usize) {
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        let place = if r.live() { crate::flow::queue_info(&queue, row.id, r.id).place() } else { None };
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        let jobs = fdb::jobs(&app.db, r.id).await.unwrap_or_default();
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        let duration = match r.finished_ms {
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            Some(f) => crate::flow::human_ms(f - r.created_ms),
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            None if r.live() => crate::flow::human_ms(db::now_ms() - r.created_ms),
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            None => "–".into(),
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        };
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        runs.push(RunRow { jobs: jobs.into_iter().map(|j| (j.name, j.status)).collect(), duration, r, place });
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    }
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    let enabled = crate::flow::enabled(&app, &row);
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    let why_not = why_not_run(enabled, viewer.account().is_some(), role);
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    let can_run = why_not.is_none();
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    let bookmarks = if can_run { bookmark_names(&app, &row).await } else { vec![] };
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    Ok(Page(RunsPage {
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        shell,
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        repo: RepoShell::new(&app, &row, "flow").with_role(role),
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        runs,
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        enabled,
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        older,
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        can_run,
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        bookmarks,
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        error: q.error,
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        why_not,
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    }))
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}
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/// The repository's bookmarks, its default first.
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async fn bookmark_names(app: &Shared, row: &db::repos::RepoRow) -> Vec<String> {
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    let Some(repo) = crate::repos::RepoName::new(&row.owner, &row.name) else { return vec![] };
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    let mut names: Vec<String> = app.repos.read(&repo, |r, _| Ok(r.view()?.bookmarks.keys().cloned().collect())).await.unwrap_or_default();
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    names.sort_by_key(|n| (n != &row.default_bookmark, n.clone()));
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    names
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}
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#[derive(Deserialize)]
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pub struct StartForm {
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    #[serde(rename = "_csrf")]
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    csrf_token: String,
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    #[serde(default)]
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    bookmark: String,
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    /// A change's full hash: run the state whose only head it is.
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    #[serde(default)]
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    change: String,
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}
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/// `POST /{owner}/{name}/flow/start`: "Run pipeline" on a bookmark's
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/// current state, or on one committed change.
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pub async fn start(
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    State(app): State<Shared>,
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    viewer: Viewer,
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    Path((owner, name)): Path<(String, String)>,
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    Form(f): Form<StartForm>,
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) -> Result<Response, Error> {
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    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow"), &viewer);
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    let me = require(&viewer, &shell)?;
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    let (_, row, _) = lookup_role(&app, &shell, &viewer, &owner, &name, Access::Write).await?;
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    csrf(&viewer, &f.csrf_token, &shell)?;
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    let (started, what) = if f.change.trim().is_empty() {
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        (crate::flow::run_bookmark(&app, &row, f.bookmark.trim(), &me.account.username, &[]).await, f.bookmark.trim().to_string())
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    } else {
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        (crate::flow::run_change(&app, &row, &f.change, &me.account.username, &[]).await, format!("change {}", f.change.trim()))
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    };
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    Ok(match started {
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        Ok(n) => {
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            db::accounts::audit(&app.db, Some(&me.account), "flow.run", &format!("{owner}/{name}"), &format!("#{n} {what}")).await.ok();
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            Redirect::to(&format!("/{owner}/{name}/flow/{n}")).into_response()
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        }
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        Err(msg) => Redirect::to(&format!("/{owner}/{name}/flow?error={}", urlencoding(&msg))).into_response(),
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    })
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}
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#[derive(Deserialize)]
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pub struct RerunForm {
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    #[serde(rename = "_csrf")]
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    csrf_token: String,
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}
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/// `POST /{owner}/{name}/flow/{number}/rerun`.
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pub async fn rerun(
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    State(app): State<Shared>,
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    viewer: Viewer,
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    Path((owner, name, number)): Path<(String, String, i64)>,
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    Form(f): Form<RerunForm>,
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) -> Result<Response, Error> {
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    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow/{number}"), &viewer);
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    let me = require(&viewer, &shell)?;
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    let (_, row, _) = lookup_role(&app, &shell, &viewer, &owner, &name, Access::Write).await?;
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    csrf(&viewer, &f.csrf_token, &shell)?;
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    let run = fdb::run(&app.db, row.id, number)
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        .await
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        .map_err(|e| Error::from_db(shell.clone(), e))?
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        .ok_or_else(|| Error::not_found(shell.clone()))?;
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    Ok(match crate::flow::rerun(&app, &row, &run, &me.account.username).await {
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        Ok(n) => {
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            db::accounts::audit(&app.db, Some(&me.account), "flow.rerun", &format!("{owner}/{name}"), &format!("#{n} of #{number}"))
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                .await
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                .ok();
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            Redirect::to(&format!("/{owner}/{name}/flow/{n}")).into_response()
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        }
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        Err(msg) => Redirect::to(&format!("/{owner}/{name}/flow?error={}", urlencoding(&msg))).into_response(),
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    })
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}
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/// `POST /{owner}/{name}/flow/{number}/jobs/{job}/rerun` (oxygenflow#31).
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pub async fn rerun_job(
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    State(app): State<Shared>,
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    viewer: Viewer,
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    Path((owner, name, number, job)): Path<(String, String, i64, String)>,
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    Form(f): Form<RerunForm>,
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) -> Result<Response, Error> {
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    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow/{number}"), &viewer);
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    let me = require(&viewer, &shell)?;
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    let (_, row, _) = lookup_role(&app, &shell, &viewer, &owner, &name, Access::Write).await?;
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    csrf(&viewer, &f.csrf_token, &shell)?;
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    let run = fdb::run(&app.db, row.id, number)
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        .await
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        .map_err(|e| Error::from_db(shell.clone(), e))?
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        .ok_or_else(|| Error::not_found(shell.clone()))?;
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    Ok(match crate::flow::rerun_job(&app, &row, &run, &job, &me.account.username).await {
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        Ok(_) => {
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            db::accounts::audit(&app.db, Some(&me.account), "flow.rerun", &format!("{owner}/{name}"), &format!("{job} of #{number}"))
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                .await
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                .ok();
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            Redirect::to(&format!("/{owner}/{name}/flow/{number}")).into_response()
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        }
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        Err(msg) => Redirect::to(&format!("/{owner}/{name}/flow?error={}", urlencoding(&msg))).into_response(),
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    })
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}
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/// `POST /{owner}/{name}/flow/{number}/cancel` (oxygenflow#32).
235 
pub async fn cancel(
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    State(app): State<Shared>,
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    viewer: Viewer,
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    Path((owner, name, number)): Path<(String, String, i64)>,
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    Form(f): Form<RerunForm>,
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) -> Result<Response, Error> {
241 
    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow/{number}"), &viewer);
242 
    let me = require(&viewer, &shell)?;
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    let (_, row, _) = lookup_role(&app, &shell, &viewer, &owner, &name, Access::Write).await?;
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    csrf(&viewer, &f.csrf_token, &shell)?;
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    let run = fdb::run(&app.db, row.id, number)
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        .await
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        .map_err(|e| Error::from_db(shell.clone(), e))?
248 
        .ok_or_else(|| Error::not_found(shell.clone()))?;
249 
    Ok(match crate::flow::cancel(&app, &row, &run, &me.account.username).await {
250 
        Ok(()) => {
251 
            db::accounts::audit(&app.db, Some(&me.account), "flow.cancel", &format!("{owner}/{name}"), &format!("#{number}")).await.ok();
252 
            Redirect::to(&format!("/{owner}/{name}/flow/{number}")).into_response()
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        }
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        Err(msg) => Redirect::to(&format!("/{owner}/{name}/flow?error={}", urlencoding(&msg))).into_response(),
255 
    })
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}
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#[derive(Deserialize)]
259 
pub struct ExpediteForm {
260 
    #[serde(rename = "_csrf")]
261 
    csrf_token: String,
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    #[serde(default)]
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    reason: String,
264 
}
265
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/// `POST /{owner}/{repo}/flow/{n}/expedite` (oxygenhub#244): a maintainer
267 
/// raises a running or queued run to urgent, saying why (an incident's
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/// fix, say). Audited and shown on the run; it lapses when the run ends.
269 
pub async fn expedite(
270 
    State(app): State<Shared>,
271 
    viewer: Viewer,
272 
    Path((owner, name, number)): Path<(String, String, i64)>,
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    Form(f): Form<ExpediteForm>,
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) -> Result<Response, Error> {
275 
    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow/{number}"), &viewer);
276 
    let me = require(&viewer, &shell)?;
277 
    let (_, row, _) = lookup_role(&app, &shell, &viewer, &owner, &name, Access::Maintain).await?;
278 
    csrf(&viewer, &f.csrf_token, &shell)?;
279 
    let run = fdb::run(&app.db, row.id, number)
280 
        .await
281 
        .map_err(|e| Error::from_db(shell.clone(), e))?
282 
        .ok_or_else(|| Error::not_found(shell.clone()))?;
283 
    let reason: String = f.reason.chars().filter(|c| !c.is_control()).take(200).collect();
284 
    let reason = reason.trim();
285 
    if reason.is_empty() {
286 
        return Ok(Redirect::to(&format!("/{owner}/{name}/flow?error={}", urlencoding("Say why the run is urgent."))).into_response());
287 
    }
288 
    let note = format!("expedited by {}: {reason}", me.account.username);
289 
    if fdb::expedite(&app.db, run.id, &note).await.map_err(|e| Error::from_db(shell.clone(), e))? {
290 
        db::accounts::audit(&app.db, Some(&me.account), "flow.expedite", &format!("{owner}/{name}"), &format!("#{number}: {reason}"))
291 
            .await
292 
            .ok();
293 
    }
294 
    Ok(Redirect::to(&format!("/{owner}/{name}/flow/{number}")).into_response())
295 
}
296
297 
/// Percent-encode a message for a query string.
298 
fn urlencoding(s: &str) -> String {
299 
    s.bytes()
300 
        .map(|b| match b {
301 
            b'A'..=b'Z' | b'a'..=b'z' | b'0'..=b'9' | b'-' | b'.' | b'_' | b'~' => (b as char).to_string(),
302 
            _ => format!("%{b:02X}"),
303 
        })
304 
        .collect()
305 
}
306
307 
/// A job placed in the graph.
308 
pub struct Node {
309 
    pub j: fdb::Job,
310 
    pub x: i64,
311 
    pub y: i64,
312 
    pub duration: String,
313 
}
314
315 
pub struct Edge {
316 
    pub d: String,
317 
    pub status: String,
318 
}
319
320 
pub struct Graph {
321 
    pub nodes: Vec<Node>,
322 
    pub edges: Vec<Edge>,
323 
    pub width: i64,
324 
    pub height: i64,
325 
}
326
327 
pub const NODE_W: i64 = 200;
328 
pub const NODE_H: i64 = 48;
329 
const COL_GAP: i64 = 72;
330 
const ROW_GAP: i64 = 18;
331 
const PAD: i64 = 12;
332
333 
/// Columns by dependency depth, jobs in each column in name order.
334 
pub fn layout(jobs: Vec<fdb::Job>) -> Graph {
335 
    let mut by_depth: std::collections::BTreeMap<i64, Vec<fdb::Job>> = Default::default();
336 
    for j in jobs {
337 
        by_depth.entry(j.depth).or_default().push(j);
338 
    }
339 
    let rows = by_depth.values().map(Vec::len).max().unwrap_or(0) as i64;
340 
    let height = PAD * 2 + rows * NODE_H + (rows - 1).max(0) * ROW_GAP;
341 
    let mut nodes = Vec::new();
342 
    for (col, (_, mut js)) in by_depth.into_iter().enumerate() {
343 
        js.sort_by(|a, b| a.name.cmp(&b.name));
344 
        let n = js.len() as i64;
345 
        let column_h = n * NODE_H + (n - 1).max(0) * ROW_GAP;
346 
        let top = (height - column_h) / 2;
347 
        for (i, j) in js.into_iter().enumerate() {
348 
            let duration = crate::flow::duration(&j);
349 
            nodes.push(Node { x: PAD + col as i64 * (NODE_W + COL_GAP), y: top + i as i64 * (NODE_H + ROW_GAP), duration, j });
350 
        }
351 
    }
352 
    let mut edges = Vec::new();
353 
    for n in &nodes {
354 
        for d in n.j.depends_on() {
355 
            if let Some(from) = nodes.iter().find(|m| m.j.name == d) {
356 
                let (x1, y1) = (from.x + NODE_W, from.y + NODE_H / 2);
357 
                let (x2, y2) = (n.x, n.y + NODE_H / 2);
358 
                let mid = (x1 + x2) / 2;
359 
                edges.push(Edge { d: format!("M{x1},{y1} C{mid},{y1} {mid},{y2} {x2},{y2}"), status: from.j.status.clone() });
360 
            }
361 
        }
362 
    }
363 
    let cols = nodes.iter().map(|n| n.x).max().map(|x| x + NODE_W + PAD).unwrap_or(PAD * 2);
364 
    Graph { nodes, edges, width: cols, height: height.max(NODE_H + PAD * 2) }
365 
}
366
367 
pub fn glyph(status: &str) -> &'static str {
368 
    match status {
369 
        "passed" => "✓",
370 
        "failed" => "✕",
371 
        "running" => "●",
372 
        "skipped" => "⤼",
373 
        "cancelled" => "⊘",
374 
        "error" => "!",
375 
        _ => "○",
376 
    }
377 
}
378
379 
/// Failed tests a run page lists per job; the rest are counted.
380 
const SHOWN_FAILURES: i64 = 50;
381
382 
pub struct JobLog {
383 
    pub j: fdb::Job,
384 
    pub artifacts: Vec<fdb::Artifact>,
385 
    pub lines: Vec<fdb::LogLine>,
386 
    pub duration: String,
387 
    /// The last line shown; the live view asks for what follows.
388 
    pub last_seq: i64,
389 
    /// The job's coverage report, when it uploaded one (#113): its id and percentage.
390 
    pub coverage: Option<(i64, String)>,
391 
    /// The job's test report, when it uploaded one (#114), and its first
392 
    /// failures.
393 
    pub tests: Option<crate::junit::Report>,
394 
    pub failures: Vec<crate::junit::Case>,
395 
}
396
397 
#[derive(Template)]
398 
#[template(path = "flow_run.html")]
399 
pub struct RunPage {
400 
    shell: Shell,
401 
    repo: RepoShell,
402 
    run: fdb::Run,
403 
    graph: Graph,
404 
    logs: Vec<JobLog>,
405 
    duration: String,
406 
    /// Whether the viewer may re-run it.
407 
    can_rerun: bool,
408 
    /// Whether the viewer may cancel it.
409 
    can_cancel: bool,
410 
    /// May raise the run to urgent (oxygenhub#244): maintainers, while it runs.
411 
    can_expedite: bool,
412 
    /// Where a live run stands among the runners' work.
413 
    queue: Option<crate::flow::QueueInfo>,
414 
    /// Releases a writer may attach this run's artifacts to.
415 
    releases: Vec<db::releases::Release>,
416 
    /// Jobs that wait, or waited, for a person (oxygenflow#57).
417 
    approvals: Vec<ApprovalView>,
418 
}
419
420 
/// A job's approval as the run page shows it.
421 
pub struct ApprovalView {
422 
    pub job: String,
423 
    pub by: String,
424 
    pub others_only: bool,
425 
    /// `waiting`, `approved`, `rejected` or `expired`.
426 
    pub state: &'static str,
427 
    pub who: String,
428 
    pub when_ms: i64,
429 
    /// Whether the viewer may approve or reject it now, else why not.
430 
    pub may: Result<(), String>,
431 
    /// It takes an approval signed with the approver's key (#235): the
432 
    /// command that signs it, and the approval's hash once sealed.
433 
    pub sealed: bool,
434 
    pub command: String,
435 
    pub seal: String,
436 
}
437
438 
impl ApprovalView {
439 
    pub fn may_decide(&self) -> bool {
440 
        self.may.is_ok()
441 
    }
442
443 
    pub fn why_not(&self) -> String {
444 
        self.may.clone().err().unwrap_or_default()
445 
    }
446 
}
447
448 
/// Lines of a job's log a page shows before "the rest is loaded as it comes".
449 
const PAGE_LINES: i64 = 5000;
450
451 
pub async fn run(
452 
    State(app): State<Shared>,
453 
    viewer: Viewer,
454 
    Path((owner, name, id)): Path<(String, String, i64)>,
455 
) -> Result<Page<RunPage>, Error> {
456 
    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow/{id}"), &viewer);
457 
    let (_repo, row, role) = lookup(&app, &shell, &viewer, &owner, &name).await?;
458 
    let run = fdb::run(&app.db, row.id, id)
459 
        .await
460 
        .map_err(|e| Error::from_db(shell.clone(), e))?
461 
        .ok_or_else(|| Error::not_found(shell.clone()))?;
462 
    let jobs = fdb::jobs(&app.db, run.id).await.map_err(|e| Error::from_db(shell.clone(), e))?;
463 
    let reports = crate::coverage::for_run(&app.db, run.id).await.unwrap_or_default();
464 
    let test_reports = crate::junit::for_run(&app.db, run.id).await.unwrap_or_default();
465 
    let mut logs = Vec::new();
466 
    for j in &jobs {
467 
        let lines = fdb::log(&app.db, j.id, 0, PAGE_LINES).await.unwrap_or_default();
468 
        let last_seq = lines.last().map(|l| l.seq).unwrap_or(0);
469 
        let artifacts = fdb::artifacts(&app.db, j.id).await.unwrap_or_default();
470 
        let coverage = reports
471 
            .iter()
472 
            .find(|r| r.job_id == Some(j.id))
473 
            .map(|r| (r.id, r.percent().map(|p| format!("{p:.1}%")).unwrap_or_else(|| "no lines".into())));
474 
        let tests = test_reports.iter().find(|r| r.job_id == j.id).cloned();
475 
        let failures = match &tests {
476 
            Some(r) if r.broken() > 0 => crate::junit::failures(&app.db, r.id, SHOWN_FAILURES).await.unwrap_or_default(),
477 
            _ => vec![],
478 
        };
479 
        logs.push(JobLog { duration: crate::flow::duration(j), j: j.clone(), artifacts, lines, last_seq, coverage, tests, failures });
480 
    }
481 
    let duration = match run.finished_ms {
482 
        Some(f) => crate::flow::human_ms(f - run.created_ms),
483 
        None => crate::flow::human_ms(db::now_ms() - run.created_ms),
484 
    };
485 
    let mut approvals = Vec::new();
486 
    for j in jobs.iter().filter(|j| !j.approval.is_empty()) {
487 
        let Some(a) = serde_json::from_str::<flow_core::Job>(&j.spec).ok().and_then(|s| s.approval) else { continue };
488 
        let state = match (j.approval.as_str(), j.status.as_str()) {
489 
            ("waiting", "queued") => "waiting",
490 
            ("approved", _) => "approved",
491 
            (_, "cancelled") if !j.approved_by.is_empty() => "rejected",
492 
            (_, "cancelled") if j.error.starts_with("no approval within") => "expired",
493 
            _ => continue,
494 
        };
495 
        let may = match (state, viewer.account()) {
496 
            ("waiting", Some(me)) => crate::flow::may_decide(&app, &row, &run, j, me).await.map(|_| ()),
497 
            ("waiting", None) => Err("sign in to approve".into()),
498 
            _ => Err(String::new()),
499 
        };
500 
        approvals.push(ApprovalView {
501 
            sealed: a.sealed,
502 
            command: format!("oxy seal --flow {}/{owner}/{name}/flow/{} --job {}", app.config.base_url(), run.number, j.name),
503 
            seal: j.approval_seal.clone(),
504 
            job: j.name.clone(),
505 
            by: a.by,
506 
            others_only: a.others_only,
507 
            state,
508 
            who: if j.approved_via.is_empty() { j.approved_by.clone() } else { format!("{} via {}", j.approved_by, j.approved_via) },
509 
            when_ms: j.approved_ms.unwrap_or(0),
510 
            may,
511 
        });
512 
    }
513 
    let graph = layout(jobs);
514 
    let can_write = viewer.account().is_some() && role >= Role::Write;
515 
    let can_rerun = !run.live() && can_write && crate::flow::enabled(&app, &row);
516 
    let can_cancel = run.live() && can_write;
517 
    let can_expedite = run.live() && run.priority.is_empty() && viewer.account().is_some() && role >= Role::Maintain;
518 
    let queue = if run.live() {
519 
        let q = fdb::queue(&app.db).await.unwrap_or_default();
520 
        Some(crate::flow::queue_info(&q, row.id, run.id)).filter(|i| i.position.is_some())
521 
    } else {
522 
        None
523 
    };
524 
    let releases = if viewer.account().is_some() && role >= Role::Write && logs.iter().any(|l| !l.artifacts.is_empty()) {
525 
        db::releases::list(&app.db, row.id).await.unwrap_or_default()
526 
    } else {
527 
        vec![]
528 
    };
529 
    Ok(Page(RunPage {
530 
        shell,
531 
        repo: RepoShell::new(&app, &row, "flow").with_role(role),
532 
        run,
533 
        graph,
534 
        logs,
535 
        duration,
536 
        can_rerun,
537 
        can_cancel,
538 
        can_expedite,
539 
        queue,
540 
        releases,
541 
        approvals,
542 
    }))
543 
}
544
545 
#[derive(Deserialize)]
546 
pub struct DecideForm {
547 
    #[serde(rename = "_csrf")]
548 
    csrf_token: String,
549 
    /// `approve` or `reject`.
550 
    action: String,
551 
}
552
553 
/// `POST /{owner}/{name}/flow/{id}/jobs/{job}/decide`: approve or reject
554 
/// a job that waits for a person (oxygenflow#57).
555 
pub async fn decide(
556 
    State(app): State<Shared>,
557 
    viewer: Viewer,
558 
    Path((owner, name, number, job)): Path<(String, String, i64, String)>,
559 
    Form(f): Form<DecideForm>,
560 
) -> Result<Response, Error> {
561 
    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow/{number}"), &viewer);
562 
    let me = require(&viewer, &shell)?;
563 
    let (_, row, _) = lookup(&app, &shell, &viewer, &owner, &name).await?;
564 
    csrf(&viewer, &f.csrf_token, &shell)?;
565 
    let run = fdb::run(&app.db, row.id, number)
566 
        .await
567 
        .map_err(|e| Error::from_db(shell.clone(), e))?
568 
        .ok_or_else(|| Error::not_found(shell.clone()))?;
569 
    let approve = match f.action.as_str() {
570 
        "approve" => true,
571 
        "reject" => false,
572 
        _ => return Err(Error::bad(shell, "approve or reject")),
573 
    };
574 
    match crate::flow::decide(&app, &row, &run, &job, &me.account, approve, None).await {
575 
        Ok(_) => Ok(Redirect::to(&format!("/{owner}/{name}/flow/{number}")).into_response()),
576 
        Err(why) => Err(Error::bad(shell, why)),
577 
    }
578 
}
579
580 
#[derive(Deserialize)]
581 
pub struct LiveQuery {
582 
    /// `job:seq,job:seq`: the last log line each open job already shows.
583 
    after: Option<String>,
584 
}
585
586 
/// `GET /{owner}/{name}/flow/{id}/live`: statuses and new log lines, for the
587 
/// run page while it is live.
588 
pub async fn live(
589 
    State(app): State<Shared>,
590 
    viewer: Viewer,
591 
    Path((owner, name, id)): Path<(String, String, i64)>,
592 
    Query(q): Query<LiveQuery>,
593 
) -> Result<Response, Error> {
594 
    let shell = Shell::new(&app, "", &viewer);
595 
    let (_repo, row, _role) = lookup(&app, &shell, &viewer, &owner, &name).await?;
596 
    let run = fdb::run(&app.db, row.id, id)
597 
        .await
598 
        .map_err(|e| Error::from_db(shell.clone(), e))?
599 
        .ok_or_else(|| Error::not_found(shell.clone()))?;
600 
    let jobs = fdb::jobs(&app.db, run.id).await.map_err(|e| Error::from_db(shell.clone(), e))?;
601 
    let after: std::collections::HashMap<i64, i64> = q
602 
        .after
603 
        .unwrap_or_default()
604 
        .split(',')
605 
        .filter_map(|p| p.split_once(':'))
606 
        .filter_map(|(a, b)| Some((a.parse().ok()?, b.parse().ok()?)))
607 
        .collect();
608 
    let mut out = Vec::new();
609 
    for j in &jobs {
610 
        let lines = match after.get(&j.id) {
611 
            Some(seq) => fdb::log(&app.db, j.id, *seq, 1000).await.unwrap_or_default(),
612 
            None => vec![],
613 
        };
614 
        out.push(serde_json::json!({
615 
            "id": j.id,
616 
            "name": j.name,
617 
            "status": j.status,
618 
            "glyph": glyph(&j.status),
619 
            "duration": crate::flow::duration(j),
620 
            "exit_code": j.exit_code,
621 
            "lines": lines.iter().map(|l| serde_json::json!({ "seq": l.seq, "t": l.t, "stream": l.stream, "text": l.text })).collect::<Vec<_>>(),
622 
        }));
623 
    }
624 
    Ok(Json(serde_json::json!({ "status": run.status, "live": run.live(), "jobs": out })).into_response())
625 
}
626
627 
// ------------------------------------------------------------ state stamps
628
629 
/// In rendered Markdown, the image path that is the viewed state's stamp.
630 
pub const STAMP_IMAGE: &str = ".flow/stamp";
631 
/// In rendered Markdown, the link path to the viewed state's run.
632 
pub const RUN_LINK: &str = ".flow/run";
633
634 
/// Resolve a ref to its state address, and whether the ref can move.
635 
async fn state_of(app: &Shared, owner: &str, name: &str, r: &str) -> Result<(String, bool), crate::repos::RepoError> {
636 
    let repo = crate::repos::RepoName::new(owner, name).ok_or(crate::repos::RepoError::NotFound)?;
637 
    let spec = r.to_string();
638 
    app.repos
639 
        .read(&repo, move |repo, cache| {
640 
            let t = crate::repos::view::resolve(repo, cache, &spec)?;
641 
            let moves = matches!(t.kind, crate::repos::view::RefKind::Bookmark | crate::repos::view::RefKind::Tag);
642 
            Ok((t.permalink().unwrap_or_default(), moves))
643 
        })
644 
        .await
645 
}
646
647 
/// `GET /{owner}/{name}/flow/stamp/{ref}` (hub spec §13.2).
648 
pub async fn stamp(
649 
    State(app): State<Shared>,
650 
    viewer: Viewer,
651 
    Path((owner, name, r)): Path<(String, String, String)>,
652 
) -> Result<Response, Error> {
653 
    let shell = Shell::new(&app, "", &viewer);
654 
    let (_repo, row, _role) = lookup(&app, &shell, &viewer, &owner, &name).await?;
655 
    let (heads, moves) = state_of(&app, &owner, &name, &r).await.map_err(|e| Error::from_repo(shell.clone(), e))?;
656 
    if moves && !heads.is_empty() {
657 
        let mut res = axum::response::Redirect::to(&format!("/{owner}/{name}/flow/stamp/{heads}")).into_response();
658 
        res.headers_mut().insert(axum::http::header::CACHE_CONTROL, axum::http::HeaderValue::from_static("no-cache"));
659 
        return Ok(res);
660 
    }
661 
    let run = fdb::latest_for_heads(&app.db, row.id, &heads).await.map_err(|e| Error::from_db(shell.clone(), e))?;
662 
    let jobs = match &run {
663 
        Some(r) => fdb::jobs(&app.db, r.id).await.map_err(|e| Error::from_db(shell.clone(), e))?,
664 
        None => vec![],
665 
    };
666 
    let svg = stamp_svg(&heads, run.as_ref(), &jobs);
667 
    let cache = if run.as_ref().is_some_and(|r| !r.live()) { "public, max-age=3600" } else { "public, max-age=60" };
668 
    Ok((
669 
        [
670 
            (axum::http::header::CONTENT_TYPE, "image/svg+xml; charset=utf-8"),
671 
            (axum::http::header::CACHE_CONTROL, cache),
672 
            (axum::http::header::CONTENT_SECURITY_POLICY, "default-src 'none'; style-src 'unsafe-inline'"),
673 
        ],
674 
        svg,
675 
    )
676 
        .into_response())
677 
}
678
679 
/// `GET /{owner}/{name}/flow/at/{ref}`: the run of the ref's state, or the Flow tab.
680 
pub async fn at(
681 
    State(app): State<Shared>,
682 
    viewer: Viewer,
683 
    Path((owner, name, r)): Path<(String, String, String)>,
684 
) -> Result<Response, Error> {
685 
    let shell = Shell::new(&app, "", &viewer);
686 
    let (_repo, row, _role) = lookup(&app, &shell, &viewer, &owner, &name).await?;
687 
    let (heads, _) = state_of(&app, &owner, &name, &r).await.map_err(|e| Error::from_repo(shell.clone(), e))?;
688 
    let run = fdb::latest_for_heads(&app.db, row.id, &heads).await.map_err(|e| Error::from_db(shell.clone(), e))?;
689 
    let to = match run {
690 
        Some(r) => format!("/{owner}/{name}/flow/{}", r.number),
691 
        None => format!("/{owner}/{name}/flow"),
692 
    };
693 
    Ok(axum::response::Redirect::to(&to).into_response())
694 
}
695
696 
fn xml(s: &str) -> String {
697 
    s.replace('&', "&amp;").replace('<', "&lt;").replace('>', "&gt;").replace('"', "&quot;")
698 
}
699
700 
/// The stamp: the mark, one glyph per job, the status, the state and the
701 
/// date; the same facts machine-readable in `<metadata>`. Fixed colours,
702 
/// because an image does not follow the page's theme.
703 
pub fn stamp_svg(heads: &str, run: Option<&fdb::Run>, jobs: &[fdb::Job]) -> String {
704 
    const CH: f64 = 6.6; // IBM Plex Mono at 11px
705 
    let colour = |s: &str| match s {
706 
        "passed" => "#5fe3a1",
707 
        "failed" | "error" => "#ff5e7a",
708 
        "running" => "#00e0f0",
709 
        _ => "#8592ad",
710 
    };
711 
    let short: String = heads.chars().take(12).collect();
712 
    let (status, date) = match run {
713 
        Some(r) => (r.status.as_str(), crate::render::time::absolute(r.created_ms as u64).chars().take(10).collect::<String>()),
714 
        None => ("no run", String::new()),
715 
    };
716 
    let mut ordered: Vec<&fdb::Job> = jobs.iter().collect();
717 
    ordered.sort_by(|a, b| (a.depth, &a.name).cmp(&(b.depth, &b.name)));
718 
    let label = "OXYGENFLOW";
719 
    let label_w = 14.0 + label.len() as f64 * 6.2 + 8.0;
720 
    let glyphs_w = if ordered.is_empty() { 0.0 } else { ordered.len() as f64 * 10.0 + 6.0 };
721 
    let tail = if date.is_empty() { format!("{status} · {short}") } else { format!("{status} · {short} · {date}") };
722 
    let right_w = 8.0 + glyphs_w + tail.chars().count() as f64 * CH + 8.0;
723 
    let w = (label_w + right_w).ceil();
724 
    let mut glyphs = String::new();
725 
    for (i, j) in ordered.iter().enumerate() {
726 
        let x = label_w + 8.0 + i as f64 * 10.0 + 4.0;
727 
        glyphs.push_str(&format!(
728 
            r#"<text x="{x:.1}" y="15" fill="{}" text-anchor="middle">{}</text>"#,
729 
            colour(&j.status),
730 
            glyph(&j.status)
731 
        ));
732 
    }
733 
    let meta = serde_json::json!({
734 
        "heads": heads.split('+').filter(|h| !h.is_empty()).collect::<Vec<_>>(),
735 
        "run": run.map(|r| r.number),
736 
        "status": status,
737 
        "jobs": ordered.iter().map(|j| serde_json::json!({ "name": j.name, "status": j.status, "receipt": j.receipt_hash })).collect::<Vec<_>>(),
738 
    });
739 
    let title = match run {
740 
        Some(r) => format!("OxygenFlow run #{} {status} on state {short}", r.number),
741 
        None => format!("OxygenFlow: no run for state {short}"),
742 
    };
743 
    format!(
744 
        r##"<svg xmlns="http://www.w3.org/2000/svg" width="{w}" height="22" viewBox="0 0 {w} 22" role="img" aria-label="{t}"><title>{t}</title><metadata>{m}</metadata><rect width="{w}" height="22" rx="4" fill="#0e1526"/><rect width="{lw:.1}" height="22" rx="4" fill="#0b3f9e"/><rect x="{lx:.1}" width="4" height="22" fill="#0b3f9e"/><circle cx="9" cy="11" r="3.2" fill="none" stroke="#00f0ff" stroke-width="1.6"/><text x="16" y="15" fill="#ffffff" font-family="Barlow, Verdana, sans-serif" font-size="10.5" font-weight="700" letter-spacing=".6">{label}</text><g font-family="IBM Plex Mono, ui-monospace, monospace" font-size="11">{glyphs}<text x="{tx:.1}" y="15" fill="{sc}">{tail}</text></g><rect x=".5" y=".5" width="{wi}" height="21" rx="3.5" fill="none" stroke="#1f2b47"/></svg>"##,
745 
        t = xml(&title),
746 
        m = xml(&meta.to_string()),
747 
        lw = label_w,
748 
        lx = label_w - 4.0,
749 
        tx = label_w + 8.0 + glyphs_w,
750 
        sc = colour(status),
751 
        tail = xml(&tail),
752 
        wi = w - 1.0,
753 
    )
754 
}
755
756 
/// A receipt kept in a repository (Oxygen spec §14.6), as pages show it.
757 
#[derive(Clone, Debug)]
758 
pub struct ReceiptRow {
759 
    pub attest: String,
760 
    pub job: String,
761 
    pub exit_code: u32,
762 
    pub duration: String,
763 
    pub runner: String,
764 
    pub run: String,
765 
    /// Why it does not verify, or that its runner's key was revoked.
766 
    pub problem: String,
767 
    pub made_ms: i64,
768 
}
769
770 
impl ReceiptRow {
771 
    pub fn passed(&self) -> bool {
772 
        self.exit_code == 0
773 
    }
774 
}
775
776 
/// The receipts kept for the state of `heads`.
777 
pub async fn receipts_of(app: &Shared, name: &crate::repos::RepoName, heads: Vec<oxy_core::hash::ChangeHash>) -> Vec<ReceiptRow> {
778 
    let base = app.config.base_url();
779 
    let found = app.repos.read(name, move |repo, _| Ok(repo.receipts(&heads)?)).await.unwrap_or_default();
780 
    found
781 
        .into_iter()
782 
        .map(|i| {
783 
            let r = &i.signed.receipt;
784 
            let run = i.signed.run().to_string();
785 
            ReceiptRow {
786 
                attest: i.attest.to_hex(),
787 
                job: r.job_name.clone(),
788 
                exit_code: r.exit_code,
789 
                duration: crate::flow::human_ms(r.duration_ms as i64),
790 
                runner: i.signed.runner.name.clone(),
791 
                // Only links to this hub are followed from the page.
792 
                run: if run.starts_with(base) { run } else { String::new() },
793 
                problem: match (i.problem, i.revoked) {
794 
                    (Some(p), _) => p,
795 
                    (None, true) => "the runner's key was revoked".into(),
796 
                    (None, false) => String::new(),
797 
                },
798 
                made_ms: i.signed.attest.hlc.wall_ms as i64,
799 
            }
800 
        })
801 
        .collect()
802 
}
803
804 
/// `GET /{owner}/{name}/receipts/{attest}`: a signed receipt, for
805 
/// `oxy receipt verify` or `oxy receipt import`.
806 
pub async fn receipt_file(
807 
    State(app): State<Shared>,
808 
    viewer: Viewer,
809 
    Path((owner, name, attest)): Path<(String, String, String)>,
810 
) -> Result<Response, Error> {
811 
    let shell = Shell::new(&app, &format!("/{owner}/{name}/receipts/{attest}"), &viewer);
812 
    let (repo, _row, _role) = lookup(&app, &shell, &viewer, &owner, &name).await?;
813 
    let Some(r) = oxy_core::hash::ObjectRef::from_hex(attest.trim_end_matches(".receipt")) else {
814 
        return Err(Error::not_found(shell));
815 
    };
816 
    let (job, bytes) = app
817 
        .repos
818 
        .read(&repo, move |repo, _| {
819 
            let i = repo.receipt(&r)?;
820 
            Ok((i.signed.receipt.job_name.clone(), i.signed.encode()))
821 
        })
822 
        .await
823 
        .map_err(|_| Error::not_found(shell.clone()))?;
824 
    let file: String = job.chars().filter(|c| c.is_ascii_alphanumeric() || matches!(c, '-' | '_' | '.')).collect();
825 
    Ok((
826 
        [
827 
            (axum::http::header::CONTENT_TYPE, "application/oxy-receipt".to_string()),
828 
            (axum::http::header::CONTENT_DISPOSITION, format!("attachment; filename=\"{file}-{}.receipt\"", r.short(12))),
829 
        ],
830 
        bytes,
831 
    )
832 
        .into_response())
833 
}
834
835 
/// `GET /{owner}/{name}/flow/{id}/artifacts/{job}/{artifact}`: an artifact
836 
/// of a run's job, read from the repository.
837 
pub async fn artifact_file(
838 
    State(app): State<Shared>,
839 
    viewer: Viewer,
840 
    Path((owner, name, id, job, artifact)): Path<(String, String, i64, String, String)>,
841 
) -> Result<Response, Error> {
842 
    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow/{id}/artifacts/{job}/{artifact}"), &viewer);
843 
    let (repo, row, _role) = lookup(&app, &shell, &viewer, &owner, &name).await?;
844 
    let run = fdb::run(&app.db, row.id, id)
845 
        .await
846 
        .map_err(|e| Error::from_db(shell.clone(), e))?
847 
        .ok_or_else(|| Error::not_found(shell.clone()))?;
848 
    let jobs = fdb::jobs(&app.db, run.id).await.map_err(|e| Error::from_db(shell.clone(), e))?;
849 
    let Some(j) = jobs.iter().find(|j| j.name == job) else { return Err(Error::not_found(shell)) };
850 
    let arts = fdb::artifacts(&app.db, j.id).await.map_err(|e| Error::from_db(shell.clone(), e))?;
851 
    let Some(a) = arts.into_iter().find(|a| a.name == artifact) else { return Err(Error::not_found(shell)) };
852 
    let Some(blob) = oxy_core::hash::ObjectRef::from_hex(&a.blob) else { return Err(Error::not_found(shell)) };
853 
    let bytes = app.repos.read(&repo, move |r, _| Ok(r.read_blob(&blob)?)).await.map_err(|_| Error::not_found(shell.clone()))?;
854 
    let file = a.path.rsplit('/').next().unwrap_or(&a.name).to_string();
855 
    Ok((
856 
        [
857 
            (axum::http::header::CONTENT_TYPE, "application/octet-stream".to_string()),
858 
            (axum::http::header::CONTENT_DISPOSITION, format!("attachment; filename=\"{}\"", file.replace('"', ""))),
859 
        ],
860 
        bytes,
861 
    )
862 
        .into_response())
863 
}
864
865 
/// `GET …/artifacts/{job}/{artifact}/provenance` (oxygenhub#239): the
866 
/// artifact's SLSA provenance in a DSSE envelope signed by the hub, for
867 
/// `cosign verify-blob-attestation --key oxyhub-signing.pem --type
868 
/// slsaprovenance1`. Only for a job whose signed receipt the hub kept.
869 
pub async fn provenance(
870 
    State(app): State<Shared>,
871 
    viewer: Viewer,
872 
    Path((owner, name, id, job, artifact)): Path<(String, String, i64, String, String)>,
873 
) -> Result<Response, Error> {
874 
    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow/{id}/artifacts/{job}/{artifact}/provenance"), &viewer);
875 
    let (repo, row, _role) = lookup(&app, &shell, &viewer, &owner, &name).await?;
876 
    let run = fdb::run(&app.db, row.id, id)
877 
        .await
878 
        .map_err(|e| Error::from_db(shell.clone(), e))?
879 
        .ok_or_else(|| Error::not_found(shell.clone()))?;
880 
    let jobs = fdb::jobs(&app.db, run.id).await.map_err(|e| Error::from_db(shell.clone(), e))?;
881 
    let Some(j) = jobs.iter().find(|j| j.name == job) else { return Err(Error::not_found(shell)) };
882 
    if j.receipt_attest.is_empty() {
883 
        return Err(Error::bad(shell, "This job has no signed receipt the hub kept, so the hub states no provenance for it.".to_string()));
884 
    }
885 
    let arts = fdb::artifacts(&app.db, j.id).await.map_err(|e| Error::from_db(shell.clone(), e))?;
886 
    let Some(a) = arts.into_iter().find(|a| a.name == artifact) else { return Err(Error::not_found(shell)) };
887 
    let Some(blob) = oxy_core::hash::ObjectRef::from_hex(&a.blob) else { return Err(Error::not_found(shell)) };
888 
    let bytes = app.repos.read(&repo, move |r, _| Ok(r.read_blob(&blob)?)).await.map_err(|_| Error::not_found(shell.clone()))?;
889 
    let file = a.path.rsplit('/').next().unwrap_or(&a.name).to_string();
890 
    let base = app.config.base_url();
891 
    let subject = crate::provenance::Subject {
892 
        name: &file,
893 
        bytes: &bytes,
894 
        repo: &format!("{owner}/{name}"),
895 
        run_url: &format!("{base}/{owner}/{name}/flow/{id}"),
896 
        bookmark: &run.bookmark,
897 
        state: &run.state,
898 
        heads: &run.heads,
899 
        pipeline_hash: &run.pipeline_hash,
900 
        job: &j.name,
901 
        runner: &j.runner,
902 
        receipt_signer: &j.receipt_signer,
903 
        receipt_attest: &j.receipt_attest,
904 
        started_ms: j.started_ms,
905 
        finished_ms: j.finished_ms,
906 
    };
907 
    let statement = crate::provenance::statement(base, &subject);
908 
    let envelope = crate::provenance::envelope(&app, &statement).map_err(|e| Error::bad(shell.clone(), e.to_string()))?;
909 
    Ok((
910 
        [
911 
            (axum::http::header::CONTENT_TYPE, "application/json".to_string()),
912 
            (axum::http::header::CONTENT_DISPOSITION, format!("attachment; filename=\"{}.intoto.json\"", file.replace('"', ""))),
913 
        ],
914 
        serde_json::to_string(&envelope).unwrap_or_default(),
915 
    )
916 
        .into_response())
917 
}
918
919 
/// `GET /.well-known/oxyhub-signing.pem`: the hub's Ed25519 public key, as
920 
/// cosign and other verifiers take it (oxygenhub#239).
921 
pub async fn signing_key(State(app): State<Shared>) -> Response {
922 
    ([(axum::http::header::CONTENT_TYPE, "application/x-pem-file")], crate::provenance::public_pem(&app)).into_response()
923 
}
924
925 
#[derive(Deserialize)]
926 
pub struct AttachForm {
927 
    _csrf: String,
928 
    release: i64,
929 
}
930
931 
/// `POST /{owner}/{name}/flow/{id}/artifacts/{job}/{artifact}/attach`: add
932 
/// an artifact to a release as an asset, named after its path; the release
933 
/// page then shows the run and receipt that built it.
934 
pub async fn attach(
935 
    State(app): State<Shared>,
936 
    viewer: Viewer,
937 
    Path((owner, name, id, job, artifact)): Path<(String, String, i64, String, String)>,
938 
    Form(f): Form<AttachForm>,
939 
) -> Result<Response, Error> {
940 
    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow/{id}"), &viewer);
941 
    require(&viewer, &shell)?;
942 
    csrf(&viewer, &f._csrf, &shell)?;
943 
    let (repo, row, _) = lookup_role(&app, &shell, &viewer, &owner, &name, Access::Write).await?;
944 
    let run = fdb::run(&app.db, row.id, id)
945 
        .await
946 
        .map_err(|e| Error::from_db(shell.clone(), e))?
947 
        .ok_or_else(|| Error::not_found(shell.clone()))?;
948 
    let jobs = fdb::jobs(&app.db, run.id).await.map_err(|e| Error::from_db(shell.clone(), e))?;
949 
    let Some(j) = jobs.iter().find(|j| j.name == job) else { return Err(Error::not_found(shell)) };
950 
    // A failing job's `when "always"` artifacts are not in its receipt, so
951 
    // they cannot stand for a release (oxygenflow#37).
952 
    if j.status != "passed" {
953 
        return Err(Error::bad(shell, "only a passing job's artifacts can be attached to a release"));
954 
    }
955 
    let arts = fdb::artifacts(&app.db, j.id).await.map_err(|e| Error::from_db(shell.clone(), e))?;
956 
    let Some(a) = arts.into_iter().find(|a| a.name == artifact) else { return Err(Error::not_found(shell)) };
957 
    let releases = db::releases::list(&app.db, row.id).await.map_err(|e| Error::from_db(shell.clone(), e))?;
958 
    let Some(rel) = releases.into_iter().find(|r| r.id == f.release) else { return Err(Error::not_found(shell)) };
959 
    let Some(blob) = oxy_core::hash::ObjectRef::from_hex(&a.blob) else { return Err(Error::not_found(shell)) };
960 
    let bytes = app.repos.read(&repo, move |r, _| Ok(r.read_blob(&blob)?)).await.map_err(|e| Error::from_repo(shell.clone(), e))?;
961 
    let file = a.path.rsplit('/').next().unwrap_or(&a.name).to_string();
962 
    super::releases::store_asset(&app, rel.id, &file, "application/octet-stream", &bytes)
963 
        .await
964 
        .map_err(|m| Error::bad(shell.clone(), m))?;
965 
    Ok(Redirect::to(&format!("/{owner}/{name}/releases/tag/{}", rel.tag)).into_response())
966 
}
967
968 
/// `/{owner}/{name}/flow/badge.svg`: the latest run on the default
969 
/// bookmark as a small SVG for a README, for whoever may read the
970 
/// repository. `passed` green, `failed` or `error` red, a run still going
971 
/// blue, none grey.
972 
pub async fn badge(
973 
    State(app): State<Shared>,
974 
    viewer: Viewer,
975 
    Path((owner, name)): Path<(String, String)>,
976 
) -> Result<axum::response::Response, Error> {
977 
    use axum::response::IntoResponse;
978 
    let shell = Shell::new(&app, &format!("/{owner}/{name}/flow"), &viewer);
979 
    let (_repo, row, _role) = lookup(&app, &shell, &viewer, &owner, &name).await?;
980 
    let latest = fdb::latest_on(&app.db, row.id, &row.default_bookmark).await.map_err(|e| Error::from_db(shell.clone(), e))?;
981 
    let (text, colour) = match latest.as_ref().map(|r| r.status.as_str()) {
982 
        Some("passed") => ("passing", "#2da44e"),
983 
        Some("failed") | Some("error") => ("failing", "#cf222e"),
984 
        Some("cancelled") => ("cancelled", "#6e7781"),
985 
        Some(_) => ("running", "#0969da"),
986 
        None => ("no runs", "#6e7781"),
987 
    };
988 
    let label = "OxygenFlow";
989 
    let (lw, tw) = (label.len() as u32 * 7 + 10, text.len() as u32 * 7 + 10);
990 
    let svg = format!(
991 
        r##"<svg xmlns="http://www.w3.org/2000/svg" width="{w}" height="20" role="img" aria-label="{label}: {text}"><title>{label}: {text}</title><rect width="{lw}" height="20" rx="3" fill="#555"/><rect x="{lw}" width="{tw}" height="20" rx="3" fill="{colour}"/><rect x="{lw}" width="4" height="20" fill="{colour}"/><g fill="#fff" font-family="Verdana,DejaVu Sans,sans-serif" font-size="11" text-anchor="middle"><text x="{lx}" y="14">{label}</text><text x="{tx}" y="14">{text}</text></g></svg>"##,
992 
        w = lw + tw,
993 
        lx = lw / 2,
994 
        tx = lw + tw / 2,
995 
    );
996 
    Ok((
997 
        [(axum::http::header::CONTENT_TYPE, "image/svg+xml; charset=utf-8"), (axum::http::header::CACHE_CONTROL, "no-cache, max-age=60")],
998 
        svg,
999 
    )
1000 
        .into_response())
1001 
}