ci: configure setup and use pnpm in benchmark comparison workflow

josephperrott · alxhub · commit a648e8e914cf · 2026-05-27T10:51:37.000-07:00
The benchmark comparison workflow fails because it runs pnpm install
without setting up node and pnpm first. We configure the setup steps
manually so that checkouts from forks are supported.

Additionally, we update the benchmark comparison script (index.mts)
to use pnpm rather than hardcoded yarn commands to install
dependencies when checking out revisions.
diff --git a/.github/workflows/benchmark-compare.yml b/.github/workflows/benchmark-compare.yml
@@ -36,6 +36,18 @@ jobs:
           # that the action was triggered by a team member.
           ref: ${{steps.comment-branch.outputs.head_sha}}
 
+      # We cannot use `angular/dev-infra/github-actions/npm/checkout-and-setup-node` here
+      # because it does not support checking out from a fork (as it lacks a `repository` input).
+      # Thus, we checkout and setup Node/pnpm manually.
+      - name: Install pnpm
+        uses: pnpm/action-setup@903f9c1a6ebcba6cf41d87230be49611ac97822e # v6.0.3
+
+      - name: Setup Node.js
+        uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'pnpm'
+
       - run: pnpm install --frozen-lockfile
 
       - uses: angular/dev-infra/github-actions/bazel/configure-remote@442c2fcbf06a321b5196b4c5fc70e78a49242958
diff --git a/scripts/benchmarks/index.mts b/scripts/benchmarks/index.mts
@@ -171,14 +171,14 @@ async function runCompare(bazelTargetRaw: string | undefined, compareRef: string
     Log.log(green('Checking out comparison revision.'));
     git.run(['checkout', 'FETCH_HEAD']);
 
-    await exec('yarn');
+    await exec('pnpm', ['install', '--frozen-lockfile']);
     await runBenchmarkTarget(bazelTarget);
   } finally {
     restoreWorkingStage(git, currentRef);
   }
 
   // Re-install dependencies for `HEAD`.
-  await exec('yarn');
+  await exec('pnpm', ['install', '--frozen-lockfile']);
 
   const comparisonResults = await collectBenchmarkResults(testlogPath);
 
