add validate step

.gitea/workflows/varnish-exporter.yml

@@ -8,30 +8,38 @@ on:
       - '*'
 
 jobs:
-  build:
+  validate:
     runs-on: ubuntu-latest
+    outputs:
+      status: ${{ steps.new_version.outputs.status }}
     steps:
-      - uses: actions/checkout@v4 # default goes to /workspace/Clients/xxx
+      - uses: actions/checkout@v4
 
-      - name: test - add env file
+      - name: Get latest release version
+        id: new_version
         run: |
-          echo "MY_GLOBAL_VAR=newvalue" > .version
-          #git config --global user.name 'gitea-actions'
-          #git config --global user.email 'no-reply@brainsys.io'
-          #git add .version
-          #git commit -m "Update version variable"
-          #git push
+          CURRENT=`cat .version`
+          LATEST=`curl --silent https://api.github.com/repos/jonnenauha/prometheus_varnish_exporter/releases/latest | jq -r .tag_name | sed "s/v//"`
+	  if [[ $LATEST -gt $CURRENT ]]; then echo $LATEST > .version; echo "status=build" >> $GITEA_OUTPUT; done
 
       - uses: stefanzweifel/git-auto-commit-action@v6
         with:
           branch: main
-          commit_message: gitea-actions auto commit
+          file_pattern: '.version'
+          commit_user_name: gitea-actions[bot]
+          commit_user_email: no-replay@brainsys.io
+          commit_message: gitea-actions auto commit - update version
           push_options: '--force'
 
+  build:
+    if: steps.validate.output.status == build
+    runs-on: ubuntu-latest
+    needs: validate
+    steps:
+      - uses: actions/checkout@v4
+
       - name: Get version
-        run: |
-          TAG=${{ gitea.ref_name }}
-          echo "VERSION=${TAG#v}" | tee -a $GITEA_ENV          
+        run: VERSION=`cat .version`
 
       - name: Setup go
         uses: actions/setup-go@v4