ci: cancel superseded pull request runs

[alexander-akait]

nodejs.yml already cancelled superseded jobs, but through three per-job concurrency groups that also cancel pushes to main and next. This replaces them with one workflow-level group that only cancels pull request runs.

concurrency:
  group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && github.ref || github.run_id }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

Why the branch pushes should not be superseded

main and next runs publish the coverage later comparisons are measured against, and a cancelled run also hides a breakage that is already on the branch — which is exactly when you want to know.

Note that cancel-in-progress: false alone would not be enough: a concurrency group holds at most one pending run, and GitHub evicts that pending run whenever a newer one enters the group regardless of the flag — "any existing pending job or workflow in the same concurrency group will be canceled and the new queued job or workflow will take its place." Hence github.run_id for non-pull-request events: each gets a group of one, so it can be neither cancelled nor evicted.

Why one workflow-level group rather than fixing the three in place

Adding the condition to the existing blocks would have been a smaller diff, but the per-job arrangement has two other costs:

• It cancels job by job. Each old job dies only as its replacement is queued; a workflow-level group cancels the whole superseded run at once. This workflow is 32 jobs — 30 test cells (three operating systems × five Node.js versions × two dev-server versions) plus lint and smoketests.
• Every matrix dimension has to be repeated in the group key. The test key currently spells out four of them (os, node-version, webpack-version, dev-server-version); a dimension added later and forgotten would make cells cancel each other, which is a quiet and confusing failure. This is not hypothetical — ci: stop sharding the test matrix and drop Node 25 webpack-dev-server#5741 had to edit its group key purely because the matrix changed. Keying on the workflow and ref cannot drift.

Happy to switch to the minimal version (keep the per-job groups, just add the condition) if you would rather keep the existing shape.

Verification

actionlint 1.7.7 is clean on nodejs.yml, and I checked that this means something by typo'ing the expression to github.event_nam, which it catches at exactly that line. The file is Prettier- and cspell-clean using this repo's .cspell.json.

Unrelated, but worth flagging since you will see it if you run the linter: actionlint reports two pre-existing errors in publish-to-pkg-pr-new.yml (steps.publish.outputs.sha / .urls referencing a step id that is not defined in that job). They reproduce on main untouched, so they are not from this PR and I have left them alone.

Untouched

• release.yml — already uses the string form, so releases queue instead of cancelling.
• dependabot.yml, dependency-review.yml, publish-to-pkg-pr-new.yml, update-docs.yml — left as they are to keep this diff to the expensive workflow. publish-to-pkg-pr-new.yml in particular publishes preview packages, so I would not want to add cancellation to it without a maintainer's view.

The same change is already open on tapable (webpack/tapable#273), watchpack (webpack/watchpack#341), webpack-sources (webpack/webpack-sources#282), schema-utils (webpack/schema-utils#228), enhanced-resolve (webpack/enhanced-resolve#673), webpack-dev-server (webpack/webpack-dev-server#5742) and webpack-dev-middleware (webpack/webpack-dev-middleware#2412).

🤖 Generated with Claude Code

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Generated by Claude Code

Summary by CodeRabbit

• Chores
  • Improved automated workflow run management.
  • Pull request checks now cancel outdated runs when newer updates are available.
  • Push-triggered checks continue running independently without canceling one another.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 32909f66-ca34-4116-8867-e2db1003c2c8

📥 Commits

Reviewing files that changed from the base of the PR and between 6f57992 and 644636c.

📒 Files selected for processing (1)

• .github/workflows/nodejs.yml

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Walkthrough

The workflow adds one top-level concurrency block. Pull request runs use a shared workflow-and-ref group and cancel in-progress runs. Push runs use the run ID and do not cancel in-progress runs. The lint, test, and smoketests jobs no longer define separate concurrency blocks.

Priority: ⬇️ Low

Merge Risk: ⚪ Minimal · up to 64463

Pull-request runs are consolidated and superseded runs are cancelled, while other runs remain independent; no merge-blocking risk was found.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	Issue #673 requires npx webpack-cli init to select no CSS solution when the user selects No. The PR changes only .github/workflows/nodejs.yml concurrency settings. It does not change the wizar…	Implement the No selection behavior in the CSS solution wizard and add an automated test that verifies no CSS solution is selected.
Out of Scope Changes check	⚠️ Warning	The PR changes workflow-level concurrency in .github/workflows/nodejs.yml. This change has no demonstrated connection to issue #673, which concerns CSS solution selection in npx webpack-cli init.	Remove the workflow concurrency changes from this PR, or link them to a requirement that covers workflow concurrency.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: cancelling superseded pull request workflow runs through updated CI concurrency settings.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…

Full details: Linked Issues check

Explanation

Issue #673 requires npx webpack-cli init to select no CSS solution when the user selects No. The PR changes only .github/workflows/nodejs.yml concurrency settings. It does not change the wizard behavior or add tests for this issue.

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[github-actions]

This PR is packaged and the instant preview is available (1dd90a4).

Install it locally:

• npm

npm i -D webpack-cli@https://pkg.pr.new/webpack-cli@1dd90a4

• yarn

yarn add -D webpack-cli@https://pkg.pr.new/webpack-cli@1dd90a4

• pnpm

pnpm add -D webpack-cli@https://pkg.pr.new/webpack-cli@1dd90a4

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.83%. Comparing base (6f57992) to head (644636c).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4854      +/-   ##
==========================================
+ Coverage   94.81%   94.83%   +0.01%     
==========================================
  Files          14       14              
  Lines        5598     5598              
  Branches      837      837              
==========================================
+ Hits         5308     5309       +1     
+ Misses        289      288       -1     
  Partials        1        1              

see 1 file with indirect coverage changes

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