add flake.lock updating and building before commiting

Author: ominit

.github/workflows/flake-lock-update.yaml

@@ -0,0 +1,39 @@
+name: Update flake.lock
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 6 */3 * *"
+jobs:
+  update-flake-lock:
+    name: Update flake.lock
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+      - name: Install Nix
+        uses: cachix/install-nix-action@v31
+        with:
+          nix_path: nixpkgs=channel:nixpkgs-unstable
+      - name: Update flake.lock
+        run: |
+          nix flake update
+      - name: Check if update is needed
+        id: check
+        run: |
+          if git diff --quiet -- flake.lock; then
+            echo "should_update=false" >>"$GITHUB_OUTPUT"
+          else
+            echo "should_update=true" >>"$GITHUB_OUTPUT"
+          fi
+      - name: Validate builds
+        if: steps.check.outputs.should_update == 'true'
+        run: |
+          nix build .#t3code .#t3code-appimage .#t3code-with-codex .#t3code-appimage-with-codex
+      - name: Commit changes
+        if: steps.check.outputs.should_update == 'true'
+        uses: stefanzweifel/git-auto-commit-action@v6
+        with:
+          commit_message: "update: flake.lock"
+          file_pattern: "flake.lock"

.github/workflows/t3code-update.yaml

@@ -30,10 +30,14 @@ jobs:
           GH_TOKEN: ${{ github.token }}
         run: |
           bash .github/update.sh --ci
+      - name: Validate builds
+        if: steps.check.outputs.should_update == 'true'
+        run: |
+          nix build .#t3code .#t3code-appimage .#t3code-with-codex .#t3code-appimage-with-codex
       - name: Commit changes
         id: commit
         if: steps.check.outputs.should_update == 'true'
         uses: stefanzweifel/git-auto-commit-action@v6
         with:
           commit_message: "${{ steps.update.outputs.commit_message }}"
-          file_pattern: "*"
+          file_pattern: "sources.json"