Change: Use is-lastest-tag action in container build workflow

This code has been generalized into an own action.

Author: bjoernricks

.github/workflows/container.yml

@@ -15,32 +15,15 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
+      - uses: greenbone/actions/is-latest-tag@v2
+        id: latest
       - name: 'set IS_VERSION_TAG'
         run: |
           echo "IS_VERSION_TAG=${{ github.ref_type == 'tag' && startsWith(github.ref_name, 'v') }}" >> $GITHUB_ENV
           # set defaults
           echo "IS_LATEST_TAG=false" >> $GITHUB_ENV
-      - name: 'set IS_LATEST_TAG'
-        if: ( env.IS_VERSION_TAG )
-        run: |
-          # find the latest version that is not ourself
-          export LATEST_VERSION=$(git tag -l | grep -v '${{ github.ref_name }}' | sort -r --version-sort)
-          # get major minor patch versions
-          IFS='.' read -r latest_major latest_minor latest_patch << EOF
-          $LATEST_VERSION
-          EOF
-          IFS='.' read -r tag_major tag_minor tag_patch << EOF
-          ${{ github.ref_name }}
-          EOF
-          # remove leading v
-          latest_major=$(echo $latest_major | cut -c2-)
-          tag_major=$(echo $tag_major | cut -c2-)
-          echo "$tag_major >= $latest_major"
-          if [[ $tag_major -ge $latest_major && ($tag_minor -ne 0 || $tag_patch -ne 0) ]]; then
-            # set this tag to latest and stable
-            echo "IS_LATEST_TAG=true" >> $GITHUB_ENV
           fi
-      - name: 'Setup meta information (IS_VERSION_TAG: ${{ env.IS_VERSION_TAG }}, IS_LATEST_TAG: ${{ env.IS_LATEST_TAG }} )'
+      - name: 'Setup meta information (IS_VERSION_TAG: ${{ env.IS_VERSION_TAG }}, IS_LATEST_TAG: ${{ steps.latest.outputs.is-latest-tag }} )'
         id: meta
         uses: docker/metadata-action@v4
         with:
@@ -51,8 +34,8 @@ jobs:
           flavor: latest=false # no auto latest container tag for git tags
           tags: |
             # when IS_LATEST_TAG is set create a stable and a latest tag
-            type=raw,value=latest,enable=${{ env.IS_LATEST_TAG }}
-            type=raw,value=stable,enable=${{ env.IS_LATEST_TAG }}
+            type=raw,value=latest,enable=${{ steps.latest.outputs.is-latest-tag == 'true' }}
+            type=raw,value=stable,enable=${{ steps.latest.outputs.is-latest-tag == 'true' }}
             # if tag version is set than create a version tags
             type=semver,pattern={{version}},enable=${{ env.IS_VERSION_TAG }}
             type=semver,pattern={{major}}.{{minor}},enable=${{ env.IS_VERSION_TAG }}