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path: root/ops/gerrit-tvl/static/tvl.js
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// vim: set noai ts=2 sw=2 et: */

// This is a read-only Buildkite token: it was generated by lukegb@, and has
// read_builds, read_build_logs, and read_pipelines permissions.
const BUILDKITE_TOKEN = 'a150658fb61062e432f13a032962d70fa9352088';

function encodeParams(p) {
  const pieces = [];
  for (let k of Object.getOwnPropertyNames(p)) {
    pieces.push(`${encodeURIComponent(k)}=${encodeURIComponent(p[k])}`);
  }
  return pieces.join('&');
}

function formatDuration(from, to) {
  const millisecondsTook = Math.floor(to.valueOf() - from.valueOf());
  if (millisecondsTook < 2000) return `${millisecondsTook} ms`;
  const secondsTook = Math.floor(millisecondsTook / 1000);
  if (secondsTook < 100) return `${secondsTook} seconds`;
  const minutesTook = Math.floor(secondsTook / 60);
  if (minutesTook < 60) return `${minutesTook} minutes`;
  const hoursTook = Math.floor(minutesTook / 60);
  const minutesRemainder = minutesTook - (hoursTook * 60);
  return `${hoursTook}hr ${minutesRemainder}min`;
}

// Maps the status of a Buildkite *job* to the statuses available for
// a Gerrit check.
//
// Note that jobs can have statuses that, according to the Buildkite
// documentation, are only available for builds, and maybe vice-versa.
// To deal with this we simply cover all statuses for all types here.
//
// Buildkite job statuses: https://buildkite.com/docs/pipelines/notifications#job-states
//
// Gerrit check statuses: https://gerrit.googlesource.com/gerrit/+/v3.4.0/polygerrit-ui/app/api/checks.ts#167
//
// TODO(tazjin): Use SCHEDULED status once we have upgraded Gerrit
// past 3.4
function jobStateToCheckRunStatus(state) {
  const status = {
    // Statuses documented for both types
    'blocked': 'RUNNABLE',
    'canceled': 'COMPLETED',
    'canceling': 'RUNNING',
    'running': 'RUNNING',
    'scheduled': 'RUNNABLE',
    'skipped': 'COMPLETED',

    // Statuses only documented for builds
    'creating': 'RUNNABLE',
    'failed': 'COMPLETED',
    'not_run': 'COMPLETED',
    'passed': 'COMPLETED',

    // Statuses only documented for jobs
    'accepted': 'RUNNABLE',
    'assigned': 'RUNNABLE',
    'blocked_failed': 'COMPLETED',
    'broken': 'COMPLETED',
    'finished': 'COMPLETED',
    'limited': 'RUNNABLE',
    'limiting': 'RUNNABLE',
    'pending': 'RUNNABLE',
    'timed_out': 'COMPLETED',
    'timing_out': 'RUNNING',
    'unblocked': 'RUNNABLE',
    'unblocked_failed': 'COMPLETED',
    'waiting': 'RUNNABLE',
    'waiting_failed': 'COMPLETED',
  }[state];

  if (!status) {
    console.log(`unknown Buildkite job state: ${state}`);
  }

  return status;
}

const tvlChecksProvider = {
  async fetch(change) {
    let {changeNumber, patchsetNumber, repo} = change;

    const experiments = window.ENABLED_EXPERIMENTS || [];
    if (experiments.includes("UiFeature__tvl_check_debug")) {
      changeNumber = 2872;
      patchsetNumber = 4;
      repo = 'depot';
    }

    if (repo !== 'depot') {
      // We only handle TVL's depot at the moment.
      return {responseCode: 'OK'};
    }

    const params = {
      // besadii groups different patchsets of the same CL under this fake ref
      branch: `cl/${changeNumber.toString()}`,
    };
    const url = `https://api.buildkite.com/v2/organizations/tvl/pipelines/depot/builds?${encodeParams(params)}`;
    const resp = await fetch(url, {
      headers: {
        Authorization: `Bearer ${BUILDKITE_TOKEN}`,
      },
    });
    const respJSON = await resp.json();

    const runs = [];
    for (let i = 0; i < respJSON.length; i++) {
      const attempt = respJSON.length - i;
      const build = respJSON[i];

      for (let job of build.jobs) {
        // Skip non-command jobs (e.g. waiting/grouping jobs)
        if (job.type !== 'script') {
          continue;
        }

        // TODO(lukegb): add the ability to retry these
        const checkRun = {
          patchset: parseInt(build.env.GERRIT_PATCHSET, 10),
          attempt: attempt,
          externalId: job.id,
          checkName: job.name,
          checkDescription: job.command,
          checkLink: job.web_url,
          status: jobStateToCheckRunStatus(job.state),
          labelName: 'Verified',
        };

        if (job.scheduled_at) {
          checkRun.scheduledTimestamp = new Date(job.scheduled_at);
        }

        if (job.started_at) {
          checkRun.startedTimestamp = new Date(job.started_at);
        }

        if (job.finished_at) {
          checkRun.finishedTimestamp = new Date(job.finished_at);
        }

        let statusDescription = job.state;
        if (checkRun.startedTimestamp && checkRun.finishedTimestamp) {
          statusDescription = `${statusDescription} in ${formatDuration(checkRun.startedTimestamp, checkRun.finishedTimestamp)}`;
        } else if (checkRun.startedTimestamp) {
          statusDescription = `${statusDescription} for ${formatDuration(checkRun.startedTimestamp, new Date())}`;
        } else if (checkRun.scheduledTimestamp) {
          statusDescription = `${statusDescription} for ${formatDuration(checkRun.scheduledTimestamp, new Date())}`;
        }
        checkRun.statusDescription = statusDescription;

        if (['failed', 'broken', 'timed_out'].includes(job.state)) {
          const result = {
            // TODO(lukegb): get the log as the message here (the Gerrit
            // implementation doesn't yet seem to support newlines in message
            // strings...)
            links: [{
              url: job.web_url,
              tooltip: "Buildkite",
              primary: true,
              icon: 'EXTERNAL',
            }],
            category: 'ERROR',
            summary: `${job.command} failed`,
          };
          checkRun.results = [result];
        }

        runs.push(checkRun);
      }
    }

    return {
      responseCode: 'OK',
      runs: runs,
    };
  },
};

Gerrit.install(plugin => {
  console.log('TVL plugin initialising');

  plugin.checks().register(tvlChecksProvider);
});