Files
setup-cli/.github/workflows/dependabot.yml
Julien Goux c099ad8c4a fix: auto-approval and refine dependabot policy (#412)
## What changed

This updates our Dependabot policy to reduce routine dependency-update
noise while keeping minor and patch updates moving automatically.

- Configure Dependabot to run weekly on Tuesday at 09:00 Europe/Paris
for both `github-actions` and `bun`
- Group all minor and patch updates per ecosystem:
  - one GitHub Actions update PR
  - one Bun dependency update PR
- Keep major updates ungrouped so Dependabot opens individual PRs for
manual review
- Reduce routine open Dependabot PRs to one per ecosystem
- Add cooldown windows so Dependabot avoids immediately chasing fresh
releases:
  - 7 days for minor updates
  - 2 days for patch updates
- Update the Dependabot automerge workflow to generate a GitHub App
token before approving PRs
- Auto-approve and enable automerge only for patch and minor updates,
including `0.x` minors
- Leave major update PRs for human review and merge

## Why

Dependabot was not able to approve/automerge PRs using the default
token. This follows the GitHub App token pattern recommended by
security, while also tuning Dependabot for a better signal-to-noise
ratio.

The resulting behavior is:

- minor/patch updates are batched weekly and can merge after CI passes
- major updates still appear, but individually and without automerge
- security updates remain handled by Dependabot/GitHub outside the
routine grouping policy
2026-04-10 08:25:40 +00:00

48 lines
2.1 KiB
YAML

# Adapted from https://docs.github.com/en/code-security/dependabot/working-with-dependabot/automating-dependabot-with-github-actions#enable-auto-merge-on-a-pull-request
name: Dependabot auto-merge
on: pull_request
concurrency:
group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
cancel-in-progress: true
permissions:
pull-requests: write
contents: write
jobs:
dependabot:
runs-on: ubuntu-latest
timeout-minutes: 10
# Only act on PRs opened by Dependabot from branches in this repository.
if: github.actor == 'dependabot[bot]' && github.repository == github.event.pull_request.head.repo.full_name
steps:
# Metadata drives the non-major gating used for approval and auto-merge.
- id: meta
uses: dependabot/fetch-metadata@ffa630c65fa7e0ecfa0625b5ceda64399aea1b36 # v3.0.0
with:
github-token: "${{ secrets.GITHUB_TOKEN }}"
- name: Generate token
id: app-token
if: ${{ steps.meta.outputs.update-type == null || steps.meta.outputs.update-type == 'version-update:semver-patch' || steps.meta.outputs.update-type == 'version-update:semver-minor' }}
uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859 # v3.0.0
with:
app-id: ${{ secrets.APP_ID }}
private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
- name: Approve a PR
if: ${{ steps.meta.outputs.update-type == null || steps.meta.outputs.update-type == 'version-update:semver-patch' || steps.meta.outputs.update-type == 'version-update:semver-minor' }}
run: gh pr review --approve "$PR_URL"
env:
PR_URL: ${{ github.event.pull_request.html_url }}
GITHUB_TOKEN: ${{ steps.app-token.outputs.token }}
- name: Enable auto-merge for Dependabot PRs
if: ${{ steps.meta.outputs.update-type == null || steps.meta.outputs.update-type == 'version-update:semver-patch' || steps.meta.outputs.update-type == 'version-update:semver-minor' }}
run: gh pr merge --auto --squash "$PR_URL"
env:
PR_URL: ${{ github.event.pull_request.html_url }}
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}