feat(gerrit-tvl): add Buildkite-backed Checks plugin implementation r/2453

This small(*) pile of JavaScript queries the Buildkite API for the
latest builds for the depot and displays the results in the rebooted
Check UI.

Change-Id: I7025a1c6d0d0afa000a9df4682133e03824ea10d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2881
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

1 files changed, 131 insertions, 0 deletions

diff --git a/ops/gerrit-tvl/static/tvl.js b/ops/gerrit-tvl/static/tvl.js
index f6c1c732a4..470eb79d66 100644
--- a/ops/gerrit-tvl/static/tvl.js
+++ b/ops/gerrit-tvl/static/tvl.js
@@ -1,3 +1,134 @@
+// 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 ${minutesRemainder}min`;
+}
+
+const tvlChecksProvider = {
+  async fetch(change) {
+    let {changeNumber, patchsetNumber, repo} = change;
+
+    const experiments = window.ENABLED_EXPERIMENTS || [];
+    if (experiments.includes("UiFeature__tvl_check_debug")) {
+      changeNumber = 2872;
+      patchsetNumber = 4;
+      repo = 'depot';
+    }
+
+    if (repo !== 'depot') {
+      // We only handle TVL's depot at the moment.
+      return {responseCode: 'OK'};
+    }
+
+    const params = {
+      // besadii uses the patchset ref as the branch name.
+      branch: `refs/changes/${changeNumber.toString().slice(-2)}/${changeNumber}/${patchsetNumber}`,
+    };
+    const url = `https://api.buildkite.com/v2/organizations/tvl/pipelines/depot/builds?${encodeParams(params)}`;
+    const resp = await fetch(url, {
+      headers: {
+        Authorization: `Bearer ${BUILDKITE_TOKEN}`,
+      },
+    });
+    const respJSON = await resp.json();
+
+    const runs = [];
+    for (let i = 0; i < respJSON.length; i++) {
+      const attempt = respJSON.length - i;
+      const build = respJSON[i];
+
+      for (let job of build.jobs) {
+        // TODO(lukegb): add the ability to retry these (sometimes whitby runs out of disk...)
+        const checkRun = {
+          attempt: attempt,
+          externalId: job.id,
+          checkName: job.name,
+          checkDescription: job.command,
+          checkLink: job.web_url,
+          status: {
+            'running': 'RUNNING',
+            'scheduled': 'RUNNABLE',
+            'passed': 'COMPLETED',
+            'failed': 'COMPLETED',
+            'blocked': 'RUNNABLE',
+            'canceled': 'COMPLETED',
+            'canceling': 'RUNNING',
+            'skipped': 'COMPLETED',
+            'not_run': 'COMPLETED',
+          }[job.state],
+          labelName: 'Verified',
+        };
+        if (job.scheduled_at) {
+          checkRun.scheduledTimestamp = new Date(job.scheduled_at);
+        }
+        if (job.started_at) {
+          checkRun.startedTimestamp = new Date(job.started_at);
+        }
+        if (job.finished_at) {
+          checkRun.finishedTimestamp = new Date(job.finished_at);
+        }
+
+        let statusDescription = job.state;
+        if (checkRun.startedTimestamp && checkRun.finishedTimestamp) {
+          statusDescription = `${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 ${formatDuration(checkRun.scheduledTimestamp, new Date())}`;
+        }
+        checkRun.statusDescription = statusDescription;
+
+        if (job.state === 'failed') {
+          const result = {
+            // TODO(lukegb): get the log as the message here (the Gerrit
+            // implementation doesn't yet seem to support newlines in message
+            // strings...)
+            links: [{
+              url: job.web_url,
+              tooltip: "Buildkite",
+              primary: true,
+              icon: 'EXTERNAL',
+            }],
+            category: 'ERROR',
+            summary: `${job.command} failed`,
+          };
+          checkRun.results = [result];
+        }
+
+        console.log(checkRun);
+        runs.push(checkRun);
+      }
+    }
+
+    return {
+      responseCode: 'OK',
+      runs: runs,
+    };
+  },
+};
+
 Gerrit.install(plugin => {
   console.log('TVL plugin initialising');
+
+  plugin.checks().register(tvlChecksProvider);
 });