image action updates

.github/actions/get-image-tag/action.yml

@@ -6,6 +6,15 @@ outputs:
   tag:
     description: The image tag
     value: ${{ steps.get_tag.outputs.tag }}
+  is_semver:
+    description: Whether the tag is a semantic version
+    value: ${{ steps.check_semver.outputs.is_semver }}
+
+inputs:
+  tag:
+    description: The image tag. If this is set it will return the tag as is.
+    required: false
+    default: ""
 
 runs:
   using: "composite"
@@ -14,7 +23,9 @@ runs:
       id: get_tag
       shell: bash
       run: |
-        if [[ "${{ github.ref_type }}" == "tag" ]]; then
+        if [[ -n "${{ inputs.tag }}" ]]; then
+          tag="${{ inputs.tag }}"
+        elif [[ "${{ github.ref_type }}" == "tag" ]]; then
           if [[ "${{ github.ref_name }}" == infra-*-* ]]; then
             env=$(echo ${{ github.ref_name }} | cut -d- -f2)
             sha=$(echo ${{ github.sha }} | head -c7)
@@ -36,3 +47,31 @@ runs:
           exit 1
         fi
         echo "tag=${tag}" >> "$GITHUB_OUTPUT"
+
+    - name: 🔍 Check for validity
+      id: check_validity
+      shell: bash
+      env:
+        tag: ${{ steps.get_tag.outputs.tag }}
+      run: |
+        if [[ "${tag}" =~ ^[a-z0-9]+([._-][a-z0-9]+)*$ ]]; then
+          echo "Tag is valid: ${tag}"
+        else
+          echo "Tag is not valid: ${tag}"
+          exit 1
+        fi
+
+    - name: 🆚 Check for semver
+      id: check_semver
+      shell: bash
+      env:
+        tag: ${{ steps.get_tag.outputs.tag }}
+      run: |
+        if [[ "${tag}" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z-]+)?$ ]]; then
+          echo "Tag is a semantic version: ${tag}"
+          is_semver=true
+        else
+          echo "Tag is not a semantic version: ${tag}"
+          is_semver=false
+        fi
+        echo "is_semver=${is_semver}" >> "$GITHUB_OUTPUT"