From 9801aa7357083d789aa01cf3ef3ce62dab09448d Mon Sep 17 00:00:00 2001
From: Silvan Mosberger <silvan.mosberger@tweag.io>
Date: Thu, 18 Apr 2024 06:58:59 +0200
Subject: [PATCH] Create Nixpkgs PRs with a separate workflow

I didn't like how it would print for all PRs unnecessarily

Furthermore it's cleaner if we trigger it based on when a release is published,
instead of depending the build job
---
 .github/workflows/main.yml    | 43 ---------------------------------
 .github/workflows/release.yml | 45 +++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 43 deletions(-)
 create mode 100644 .github/workflows/release.yml

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 707626f..d2db5ef 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -57,46 +57,3 @@ jobs:
           } > $GITHUB_STEP_SUMMARY
         env:
           GH_TOKEN: ${{ github.token }}
-
-  nixpkgs-pr:
-    runs-on: ubuntu-latest
-    if: ${{ github.event_name == 'push' }}
-    needs: build
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          repository: NixOS/nixpkgs
-
-      - name: Update nixpkgs-check-by-name in Nixpkgs
-        run: |
-          echo "rev=$(git rev-parse HEAD)" >> $GITHUB_ENV
-          echo "before=$(<pkgs/test/check-by-name/pinned-version.txt)" >> $GITHUB_ENV
-
-          # We run bash explicitly instead of using the files shebang,
-          # because the shebang is using nix-shell with dependencies we already have by default
-          bash pkgs/test/check-by-name/update-pinned-tool.sh
-
-          echo "after=$(<pkgs/test/check-by-name/pinned-version.txt)" >> $GITHUB_ENV
-
-      - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v6
-        with:
-          # To trigger CI for automated PRs, we use a separate machine account
-          # See https://github.com/peter-evans/create-pull-request/blob/main/docs/concepts-guidelines.md#workarounds-to-trigger-further-workflow-runs
-          # and https://github.com/peter-evans/create-pull-request/blob/main/docs/concepts-guidelines.md#push-pull-request-branches-to-a-fork
-          token: ${{ secrets.MACHINE_USER_PAT }}
-          push-to-fork: infinixbot/nixpkgs
-          committer: infinixbot <infinixbot@infinisil.com>
-          author: infinixbot <infinixbot@infinisil.com>
-          branch: update/nixpkgs-check-by-name
-          commit-message: |
-            nixpkgs-check-by-name: ${{ env.before }} -> ${{ env.after }}
-
-            https://github.com/NixOS/nixpkgs-check-by-name/releases/tag/${{ env.after }}
-          title: "nixpkgs-check-by-name: ${{ env.before }} -> ${{ env.after }}"
-          body: >
-            This is an automated PR to update the version of [nixpkgs-check-by-name](https://github.com/NixOS/nixpkgs-check-by-name),
-            which is used by CI to [check the `pkgs/by-name`](https://github.com/NixOS/nixpkgs/tree/${{ env.rev }}/pkgs/by-name#validation) directory.
-            The update was performed by running [`pkgs/test/check-by-name/update-pinned-tool.sh`](https://github.com/NixOS/nixpkgs/tree/${{ env.rev }}/pkgs/test/check-by-name#update-pinned-toolsh).
-
-            This PR updates the tool to [version ${{ env.after }}](https://github.com/NixOS/nixpkgs-check-by-name/releases/tag/${{ env.after }}).
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..0104a85
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,45 @@
+on:
+  release:
+    types: [published]
+
+jobs:
+  create-pr:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          repository: NixOS/nixpkgs
+
+      - name: Update nixpkgs-check-by-name in Nixpkgs
+        run: |
+          echo "rev=$(git rev-parse HEAD)" >> $GITHUB_ENV
+          echo "before=$(<pkgs/test/check-by-name/pinned-version.txt)" >> $GITHUB_ENV
+
+          # We run bash explicitly instead of using the files shebang,
+          # because the shebang is using nix-shell with dependencies we already have by default
+          bash pkgs/test/check-by-name/update-pinned-tool.sh
+
+          echo "after=$(<pkgs/test/check-by-name/pinned-version.txt)" >> $GITHUB_ENV
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v6
+        with:
+          # To trigger CI for automated PRs, we use a separate machine account
+          # See https://github.com/peter-evans/create-pull-request/blob/main/docs/concepts-guidelines.md#workarounds-to-trigger-further-workflow-runs
+          # and https://github.com/peter-evans/create-pull-request/blob/main/docs/concepts-guidelines.md#push-pull-request-branches-to-a-fork
+          token: ${{ secrets.MACHINE_USER_PAT }}
+          push-to-fork: infinixbot/nixpkgs
+          committer: infinixbot <infinixbot@infinisil.com>
+          author: infinixbot <infinixbot@infinisil.com>
+          branch: update/nixpkgs-check-by-name
+          commit-message: |
+            nixpkgs-check-by-name: ${{ env.before }} -> ${{ env.after }}
+
+            https://github.com/NixOS/nixpkgs-check-by-name/releases/tag/${{ env.after }}
+          title: "nixpkgs-check-by-name: ${{ env.before }} -> ${{ env.after }}"
+          body: >
+            This is an automated PR to update the version of [nixpkgs-check-by-name](https://github.com/NixOS/nixpkgs-check-by-name),
+            which is used by CI to [check the `pkgs/by-name`](https://github.com/NixOS/nixpkgs/tree/${{ env.rev }}/pkgs/by-name#validation) directory.
+            The update was performed by running [`pkgs/test/check-by-name/update-pinned-tool.sh`](https://github.com/NixOS/nixpkgs/tree/${{ env.rev }}/pkgs/test/check-by-name#update-pinned-toolsh).
+
+            This PR updates the tool to [version ${{ env.after }}](https://github.com/NixOS/nixpkgs-check-by-name/releases/tag/${{ env.after }}).