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ci(flake-update): use a GitHub App token instead of a PAT #1

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Merged
jx-wi merged 1 commit into from
Jun 15, 2026
Merged

ci(flake-update): use a GitHub App token instead of a PAT #1

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17 changes: 14 additions & 3 deletions .github/workflows/flake-update.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -15,10 +15,21 @@ on:
jobs:
update:
runs-on: ubuntu-latest
# Least privilege: GITHUB_TOKEN is used only by checkout (read). The branch push + PR
# creation use a GitHub App installation token (below), not GITHUB_TOKEN.
permissions:
contents: write
pull-requests: write
contents: read
steps:
# Mint a short-lived (~1h) GitHub App installation token — used instead of GITHUB_TOKEN so
# the bot's PR actually triggers `check` (PRs opened by GITHUB_TOKEN don't), and instead of
# a PAT so there's no token expiry to silently break the weekly run and no tie to a personal
# account (the PR comes from the org App's identity). Needs repo variable APP_ID + secret
# APP_PRIVATE_KEY; App permissions: Contents RW + Pull requests RW, installed on this repo.
- uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
id: app-token
with:
app-id: ${{ vars.APP_ID }}
private-key: ${{ secrets.APP_PRIVATE_KEY }}
- uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2 (Jan 2026)
- uses: DeterminateSystems/nix-installer-action@ef8a148080ab6020fd15196c2084a2eea5ff2d25 # v22 (Mar 2026)
- name: nix flake update
Expand All @@ -27,7 +38,7 @@ jobs:
id: cpr
uses: peter-evans/create-pull-request@5f6978faf089d4d20b00c7766989d076bb2fc7f1 # v8.1.1 (Apr 2026)
with:
token: ${{ secrets.PAT }}
token: ${{ steps.app-token.outputs.token }}
commit-message: "flake: update inputs"
title: "flake: update inputs"
branch: flake-update/auto
Expand Down