[actions] fix the autoupdate action

.gitea/workflows/autoupdate.yml

@@ -18,8 +18,27 @@ jobs:
               run: |
                   apt-get update
                   apt-get install -y sudo
+            - name: Install Tea
+              env:
+                TEA_DL_URL: "https://dl.gitea.com/tea/0.9.2/tea-0.9.2-linux-amd64"
+              shell: bash
+              run: |
+                TEA_DIR=$(mktemp -d -t tmp.XXXX)
+                pushd $TEA_DIR
+                wget "$TEA_DL_URL"
+                wget "${TEA_DL_URL}.sha256"
+                if $(sha256sum --quiet -c "tea-0.9.2-linux-amd64.sha256"); then
+                mv "tea-0.9.2-linux-amd64" /usr/bin/tea
+                chmod +x /usr/bin/tea
+                popd
+                rm -rf $TEA_DIR
+                else
+                popd
+                rm -rf $TEA_DIR
+                echo "::error title=⛔ error hint::Tea v0.9.2 Checksum Failed"
+                exit 1
+                fi
             - uses: https://code.forgejo.org/actions/checkout@v6
-
             - name: Set up Nix
               uses: https://github.com/cachix/install-nix-action@v31
               with: 
@@ -27,15 +46,65 @@ jobs:
 
             - name: Run nix flake update
               run: nix flake update
-            - name: Run nix flake check
-              run: nix flake check --all-systems --verbose
 
-            - name: Create Gitea PR
-              uses: https://github.com/Mai0313/create-pull-request@main
-              with:
-                github-server-url: https://git.dynamicdiscord.de
-                token: ${{ secrets.AHTLONS_GITEA_TOKEN }}
-                commit-message: 'Update flake.lock'
-                committer: 'malobot <malobot@systemli.org>'
-                title: 'Update flake.lock'
-                assignees: 'ahtlon'
+            - name: Commit flake.lock
+              run: |
+                  git config user.name "malobot"
+                  git config user.email "malobot@systemli.org"
+                  git stash push
+                  git branch nixpkgs_bump_$(date +%Y%m%d)
+                  git checkout nixpkgs_bump_$(date +%Y%m%d)
+                  git stash pop
+                  git add flake.lock
+                  git diff --staged --quiet || git commit -m "Update flake.lock"
+
+            - name: Check for eval warnings
+              id: commit
+              shell: bash
+              run: |
+                {
+                echo "COMMIT_DESC<<EOF"
+                echo "Date: $(date)"
+                echo "Evaluation warnings:"
+                nix flake check --all-systems --no-build 2>&1 | grep evaluation | awk '!seen[$0]++' || echo "None :)"
+                echo EOF
+                } >> "$GITHUB_OUTPUT"
+            
+            
+            - name: Login to Gitea
+              shell: bash
+              env:
+                GIT_SERVER_URL: https://git.dynamicdiscord.de
+                GIT_SERVER_TOKEN: ${{ secrets.AHTLONS_GITEA_TOKEN }}
+              run: >-
+                tea login add
+                -u "$GIT_SERVER_URL"
+                -t "$GIT_SERVER_TOKEN"
+            - name: Check for existing pull request
+              id: no-pr
+              continue-on-error: true
+              shell: bash
+              run: >-
+                tea pr -f head -o simple |
+                grep -q ${{ github.ref_name }} &&
+                exit 1 ||
+                exit 0
+            - name: Force push branch
+              run: git push --force -u origin nixpkgs_bump_$(date +%Y%m%d)
+            - name: Create pull request
+              if: steps.no-pr.outcome == 'success'
+              env:
+                COMMIT_MSG: Automatic Nixpkgs update
+                COMMIT_DESC: ${{ steps.commit.outputs.COMMIT_DESC }}
+              shell: bash
+              run: >-
+                tea pr create
+                -L "bump"
+                -t "$COMMIT_MSG"
+                -d "$COMMIT_DESC"
+            - name: Skip pull request
+              if: steps.no-pr.outcome == 'failure'
+              shell: bash
+              run: >
+                echo "::error title=⛔ error hint::
+                A PR already exists for this branch: ${{ github.ref_name }}"