Calculate admintools tag

.github/workflows/release-admin-tools.yml

@@ -8,9 +8,9 @@ on:
       commit:
         description: "Repo Commit sha"
         required: true
-      admintools_tag:
-        description: "The tag for the new admintools image"
-        required: true
+      patch:
+        description: "The optional patch version of the admintools image"
+        required: false
       latest:
         type: boolean
         description: "Also update latest tag"
@@ -23,19 +23,51 @@ on:
         default: false
 
 jobs:
-  retag-and-release:
+  release-admin-tools:
     name: "Re-tag and release images"
     runs-on: ubuntu-latest
 
     steps:
+      # Main
       - uses: actions/checkout@v4
+      # For the action itself
+      - name: Check out target commit
+        uses: actions/checkout@v4
+        with:
+          path: target
+          submodules: "true"
+          ref: ${{ github.event.inputs.commit }}
       - uses: actions/setup-go@v5
         with:
-          go-version-file: "**/go.mod"
+          go-version-file: "src/go.mod"
+      - name: Calculate admintools tag
+        run: |
+          get_tag() {
+            # We need to remove the `shallow` marker for this submodule or else
+            # `git describe --tags` won't find our tags
+            cd "target/$1"
+            # We need to fetch the tags before git describe will do what we want
+            # We _only_ fetch the tags to save time
+            git fetch origin 'refs/tags/*:refs/tags/*' >&2
+            rm -f ../.git/modules/$1/shallow
+            git describe --tags --always | cut -d '-' -f-2
+          }
+
+          tag=$(date "+%Y.%-m.%-d")
+          if [ -n "${{inputs.patch}}" ]; then
+            tag="${tag}-p${{inputs.patch}}"
+          fi
+
+          tag="${tag}+"
+          while read module; do
+            tag="${tag}${module}-$(get_tag ${module})."
+          done < <(git submodule status | cut -d ' ' -f3 | grep -v dockerize)
+
+          echo "TAG=${tag%.}" >> "${GITHUB_ENV}"
       - name: Copy images
         env:
           COMMIT: ${{ github.event.inputs.commit }}
-          TAG: ${{ github.event.inputs.admintools_tag }}
+          TAG: ${{ env.TAG }}
           USERNAME: ${{ secrets.DOCKER_USERNAME }}
           PASSWORD: ${{ secrets.DOCKER_PAT }}
           IMAGES: admintools