chore: add script to generate a script to schedule presubmit runs (#10994)

Author: jelbourn

package-lock.json

@@ -36,6 +36,7 @@
     "conventional-changelog": "^1.1.0",
     "dgeni": "^0.4.1",
     "dgeni-packages": "^0.13.0",
+    "github": "^12.0.5",
     "github-contributors-list": "^1.2.1",
     "glob": "~7.0.5",
     "gulp": "^3.9.1",

package.json

@@ -0,0 +1,83 @@
+#!/usr/bin/env node
+
+const path = require('path');
+const fs = require('fs');
+const GitHubApi = require('github');
+const github = new GitHubApi();
+
+
+/** CONFIGURATION: change these things if you want to tweak how the runs are made. */
+
+/** Path to the local ng-material. By default based on the location of this script. */
+const localRepo = path.resolve(__dirname, '..');
+
+/** Where to write the output from the presubmit script. */
+const logDir = '/tmp/v1-pr-presubmit-logs';
+
+/**
+ * The presubmit script to use (can change this if you want to use a locally modified script).
+ * The default path is stored in an environment variable because it references an internal-Google
+ * location.
+ */
+const presubmitScript = path.join(process.env.MAT_PRESUBMIT_DIR, 'sync-material.sh');
+
+/** Time to start presubmits. */
+const startTime = '9:30 pm';
+
+/** Number of minutes between presubmit runs. */
+const intervalMinutes = 20;
+
+/** Instead of querying github for PR numbers, manually provide the PR numbers to be presubmit */
+const explicitPullRequests = [];
+
+/** END OF CONFIGURATION. */
+
+
+
+/** Number of intervals that have scheduled tasks already. */
+let presubmitCount = 0;
+
+if (explicitPullRequests.length) {
+  writeScheduleScript(explicitPullRequests.map(n => ({number: n})));
+} else {
+  // Fetch PRs that are merge-ready but not merge-safe
+  github.search.issues({
+    per_page: 100,
+    q: 'repo:angular/material is:open type:pr label:"pr: merge ready" -label:"pr: merge safe"',
+  }, (error, response) => {
+    if (response) {
+      writeScheduleScript(response.data.items);
+    } else {
+      console.error('Fetching merge-ready PRs failed.');
+      console.error(error);
+    }
+  });
+}
+
+
+function writeScheduleScript(prs) {
+  let script =
+    `#!/bin/bash \n\n` +
+    `mkdir -p ${logDir} \n\n` +
+    `# Be sure you have no locally modified files in your git client before running this. \n\n`;
+
+  // Generate a command for each file to be piped into the `at` command, scheduling it to run at
+  // a later time.
+  for (const pr of prs) {
+    script +=
+      `echo '(` +
+        `cd ${localRepo} ; ` +
+        `${presubmitScript} presubmit ${pr.number} --global 2>&1 > ${logDir}/pr-${pr.number}.txt ` +
+      `)' | ` +
+      `at ${startTime} today + ${intervalMinutes * presubmitCount} min ` +
+    `\n`;
+
+    presubmitCount++;
+  }
+
+  fs.writeFileSync(path.join(localRepo, 'dist', 'schedule-presubmit.sh'), script, 'utf-8');
+
+  console.log('schedule-presubmit.sh written to dist');
+  console.log('Be sure to prodaccess overnight, that you have no locally modified files, ' +
+              'and push_tag has been run');
+}