feat: add ncu-ci resume command

bin/ncu-ci.js

@@ -23,6 +23,7 @@ import {
 import {
   RunPRJob
 } from '../lib/ci/run_ci.js';
+import { ResumePRJob } from '../lib/ci/resume_ci.js';
 import { writeJson, writeFile } from '../lib/file.js';
 import { getMergedConfig } from '../lib/config.js';
 import { runPromise } from '../lib/run.js';
@@ -134,6 +135,26 @@ const args = yargs(hideBin(process.argv))
     },
     handler
   })
+  .command({
+    command: 'resume <prid>',
+    desc: 'Resume the latest CI run for given PR',
+    builder: (yargs) => {
+      yargs
+        .positional('prid', {
+          describe: 'ID of the PR or URL to the PR',
+          type: 'string'
+        })
+        .option('owner', {
+          default: '',
+          describe: 'GitHub repository owner'
+        })
+        .option('repo', {
+          default: '',
+          describe: 'GitHub repository name'
+        });
+    },
+    handler
+  })
   .command({
     command: 'url <url>',
     desc: 'Automatically detect CI type and show results',
@@ -278,11 +299,13 @@ class RunPRJobCommand {
     return this.argv.prid;
   }
 
-  async start() {
-    const {
-      cli, request, prid, repo, owner
-    } = this;
+  validate() {
+    const { cli, prid, repo, owner } = this;
     let validArgs = true;
+    if (!Number.isSafeInteger(prid) || prid <= 0) {
+      validArgs = false;
+      cli.error('Pull request ID must be a positive integer');
+    }
     if (!repo) {
       validArgs = false;
       cli.error('GitHub repository is missing, please set it via ncu-config ' +
@@ -295,6 +318,13 @@ class RunPRJobCommand {
     }
     if (!validArgs) {
       this.cli.setExitCode(1);
+    }
+    return validArgs;
+  }
+
+  async start() {
+    const { cli, request, prid, repo, owner } = this;
+    if (!this.validate()) {
       return;
     }
     const { certifySafe, checkForDuplicates } = this.argv;
@@ -308,6 +338,20 @@ class RunPRJobCommand {
   }
 }
 
+class ResumePRJobCommand extends RunPRJobCommand {
+  async start() {
+    const { cli, request, prid, repo, owner } = this;
+    if (!this.validate()) {
+      return;
+    }
+    const jobRunner = new ResumePRJob(cli, request, owner, repo, prid);
+    if (!(await jobRunner.resume())) {
+      cli.setExitCode(1);
+      process.exitCode = 1;
+    }
+  }
+}
+
 class CICommand {
   constructor(cli, request, argv) {
     this.cli = cli;
@@ -565,7 +609,8 @@ async function main(command, argv) {
   let commandHandler;
   // Prepare queue.
   switch (command) {
-    case 'run': {
+    case 'run':
+    case 'resume': {
       const maybeURL = URL.parse(argv.prid);
       if (maybeURL?.host === 'github.com') {
         const [, owner, repo, , prid, , commit_sha] = maybeURL.pathname.split('/');
@@ -575,7 +620,8 @@ async function main(command, argv) {
         argv.prid = prid;
       }
       argv.prid = Number(argv.prid);
-      const jobRunner = new RunPRJobCommand(cli, request, argv);
+      const Command = command === 'run' ? RunPRJobCommand : ResumePRJobCommand;
+      const jobRunner = new Command(cli, request, argv);
       return jobRunner.start();
     }
     case 'rate': {

docs/ncu-ci.md

@@ -17,6 +17,7 @@ Commands:
                             runs
   ncu-ci walk <type>        Walk the CI and display the failures
   ncu-ci run <prid>         Start a node-test-pull-request CI job for a PR
+  ncu-ci resume <prid>      Resume the latest node-test-pull-request CI job for a PR
   ncu-ci url <url>          Automatically detect CI type and show results
   ncu-ci pr <jobid>         Show results of a node-test-pull-request CI job
   ncu-ci commit <jobid>     Show results of a node-test-commit CI job
@@ -172,6 +173,38 @@ ncu-ci run https://github.com/nodejs/node/pull/34127/commits/35ea6ded7315cf9d058
 If the PR has the `v8 engine` label, `ncu-ci run` also triggers the `node-test-commit-v8-linux`
 job after the main PR CI job is started successfully.
 
+### `ncu-ci resume <prid>`
+
+`ncu-ci resume <prid>` resumes the latest `node-test-pull-request` CI run linked
+in the PR description, comments, or reviews. The job must have finished with
+`FAILURE` or `ABORTED` and expose Jenkins' resume action. Running jobs and jobs with
+other results are not resumed. If no PR CI run is found, the command reports that
+and exits unsuccessfully.
+
+The CI-approved commit (`COMMIT_SHA_CHECK`) must match the PR's current HEAD.
+The command refuses to resume if they differ or the approved commit cannot be
+determined.
+
+Before resuming, the command streams failed-job console output and compares
+failure diagnostics with the PR's changed files. It refuses to resume if a failed
+test or a file referenced in a failure diagnostic is changed by the PR. Logs are
+scanned one at a time with bounded memory. HTTP compression is decoded as the
+response arrives. A match cancels the download and skips remaining logs. Unknown
+or unavailable failure details do not prevent resuming; the check uses the
+available diagnostics. Failure to retrieve the PR's changed-file list prevents
+resuming.
+
+Pass a PR number with repository information from config or flags, or a PR URL:
+
+```sh
+ncu-ci resume 34127 --owner nodejs --repo node
+ncu-ci resume https://github.com/nodejs/node/pull/34127
+```
+
+This uses Jenkins' **Resume build** action on the existing job. It does not start
+a fresh CI run for the current PR head. Jenkins credentials with permission to
+resume the job are required.
+
 ### `ncu-ci pr <jobid>` 
 
 `ncu-ci pr <jobid>` returns information about the results of a `node-test-pull-request` job.