feat: make GIT_BRANCH and GIT_COMMIT_HASH available as build args (#219)

* feat: make GIT_BRANCH and GIT_COMMIT available as build args

* Fix injection problems

* Make actual action for it

* Lint fix

* Rename to commit_hash

* Change workflow branch from 'mp/docker_branch' to 'main'

Author: puehringer

.github/actions/get-branch/action.yml

@@ -0,0 +1,41 @@
+name: get-branch
+description: extracts the branch in readable form
+author: datavisyn
+
+inputs:
+  branch:
+    description: "branch override"
+    required: false
+
+outputs:
+  branch:
+    description: "extracted branch"
+    value: ${{ steps.get-branch.outputs.branch }}
+  commit_hash:
+    description: "extracted commit hash"
+    value: ${{ steps.get-branch.outputs.commit_hash }}
+
+runs:
+  using: "composite"
+  steps:
+    - name: Extract branch and commit hash
+      shell: bash
+      id: get-branch
+      run: |
+        # Use HEAD_REF for PRs, fallback to REF_NAME for pushes.
+        BRANCH_NAME_RAW="${HEAD_REF:-"$REF_NAME"}"
+        # Clean up the ref by removing 'refs/heads/' or 'refs/tags/'
+        BRANCH_NAME="${BRANCH_NAME_RAW#refs/heads/}"
+        BRANCH_NAME="${BRANCH_NAME#refs/tags/}"
+        
+        # A manual input from workflow_dispatch will always override the detected branch name
+        if [ -n "${MANUAL_BRANCH}" ]; then
+          BRANCH_NAME="${MANUAL_BRANCH}"
+        fi
+        
+        echo "branch=${BRANCH_NAME}" >> $GITHUB_OUTPUT
+        echo "commit_hash=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+      env:
+        HEAD_REF: ${{ github.head_ref }}
+        REF_NAME: ${{ github.ref_name }}
+        MANUAL_BRANCH: ${{ inputs.branch }}

.github/workflows/build-docker-artifacts.yml

@@ -211,6 +211,11 @@ jobs:
         id: login-ecr
         uses: aws-actions/[email protected]
 
+      - uses: ./tmp/github-workflows/.github/actions/get-branch
+        id: get-branch
+        with:
+          branch: ${{ inputs.branch }}
+
       - name: Build image
         uses: docker/build-push-action@v6
         with:
@@ -223,6 +228,8 @@ jobs:
           # Disable the cache to avoid outdated (base) images
           no-cache: true
           build-args: |
+            GIT_BRANCH=${{ steps.get-branch.outputs.branch }}
+            GIT_COMMIT_HASH=${{ steps.get-branch.outputs.commit_hash }}
             DOCKERFILE_DIRECTORY=${{ matrix.component.flavor_directory }}/${{ matrix.component.directory }}
             PYTHON_BASE_IMAGE=${{ env.PYTHON_BASE_IMAGE }}
             DATAVISYN_PYTHON_BASE_IMAGE=${{ env.DATAVISYN_PYTHON_BASE_IMAGE }}