From 32b46c4a704aafd25c46f5eeaf2be5537dd933b8 Mon Sep 17 00:00:00 2001
From: Pedro Rey Anca <personal@peprolinbot.com>
Date: Thu, 21 Aug 2025 20:01:48 +0200
Subject: [PATCH] Add workflow to update flake inputs

---
 .forgejo/workflows/update-flake-inputs.yaml | 82 +++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 .forgejo/workflows/update-flake-inputs.yaml

diff --git a/.forgejo/workflows/update-flake-inputs.yaml b/.forgejo/workflows/update-flake-inputs.yaml
new file mode 100644
index 0000000..2d60027
--- /dev/null
+++ b/.forgejo/workflows/update-flake-inputs.yaml
@@ -0,0 +1,82 @@
+name: Update `flake.lock`
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * 6' # runs weekly on Saturday at 00:00
+
+jobs:
+  update_lockfile:
+    runs-on: docker
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Install nix
+        uses: https://github.com/DeterminateSystems/nix-installer-action@main
+
+      - name: Update flake.lock
+        id: update
+        run: |
+          nix flake update 2> >(tee /dev/stderr) | awk '
+            /^• Updated input/ {in_update = 1; print; next}
+            in_update && !/^warning:/ {print}
+            /^$/ {in_update = 0}
+          ' > update.log
+
+          echo "UPDATE_LOG<<EOF" >> $GITHUB_ENV
+          cat update.log >> $GITHUB_ENV 
+          echo "EOF" >> $GITHUB_ENV
+
+          rm update.log
+
+      - name: Write PR body template
+        uses: https://github.com/DamianReeves/write-file-action@v1.3
+        with:
+          path: pr_body.template
+          contents: |
+            - The following Nix Flake inputs were updated:
+
+            ```
+            ${{ env.UPDATE_LOG }}
+            ```
+
+            Auto-generated by [update-flake-inputs.yaml][1] with the help of
+            [create-pull-request][2].
+
+            [1]: https://git.peprolinbot.com/peprolinbot/frues-clan/src/branch/main/.forgejo/workflows/update-flake-inputs.yaml
+            [2]: https://forgejo.stefka.eu/jiriks74/create-pull-request
+
+      - name: Generate PR body
+        uses: https://github.com/pedrolamas/handlebars-action@v2.4.0
+        with:
+          files: "pr_body.template"
+          output-filename: "pr_body.md"
+      - name: Save PR body
+        id: pr_body
+        uses: https://github.com/juliangruber/read-file-action@v1
+        with:
+          path: "pr_body.md"
+
+      - name: Remove temporary files
+        run: |
+          rm pr_body.template
+          rm pr_body.md
+
+      - name: Create Pull Request
+        id: create-pull-request
+        uses: https://forgejo.stefka.eu/jiriks74/create-pull-request@7174d368c2e4450dea17b297819eb28ae93ee645
+        with:
+          token: ${{ secrets.FORGEJO_TOKEN  }}
+          body: ${{ steps.pr_body.outputs.content }}
+          author: '"forgejo-actions[bot]" <forgejo-actions[bot]@users.noreply.git.peprolinbot.com>'
+          title: 'automated: Update `flake.lock`'
+          commit-message: |
+            automated: Update `flake.lock`
+
+            ${{ steps.pr_body.outputs.content }}
+
+          branch: update-flake-lock
+          delete-branch: true
+      - name: Print PR number
+        run: |
+          echo "Pull request number is ${{ steps.create-pull-request.outputs.pull-request-number }}."
+          echo "Pull Request URL - ${{ steps.cpr.outputs.pull-request-url }}"