Fix autoupdate PR message (#41)

* Fix PR message

* Tweaks

* Update create-pull-request version

* Reorder

.github/workflows/update-base-image.yml

@@ -22,10 +22,11 @@ jobs:
         python -m pip install --quiet --disable-pip-version-check -r scripts/update_base_image_reqs.txt
         python scripts/update_base_image.py
     - name: Create PR
-      uses: peter-evans/create-pull-request@ee93d78b55ada32aa74b5e9957aac9c2523dd22c
+      uses: peter-evans/create-pull-request@v6.0.5
       with:
         branch: "update-base-image"
-        commit-message: "Update to micromamba base image to ${{ steps.update_dockerfile.outputs.new_docker_tag }}"
-        title: "Update to micromamba base image to ${{ steps.update_dockerfile.outputs.new_docker_tag }}"
+        commit-message: "Update to micromamba base image to ${{ env.NEW_DOCKER_TAG }}"
+        title: "Update to micromamba base image to ${{ env.NEW_DOCKER_TAG }}"
+        body: "Generated by [update-base-image.yml](https://github.com/mamba-org/micromamba-devcontainer/actions/runs/${{ github.run_id }}/workflow)"
         delete-branch: true
         reviewers: maresb

scripts/update_base_image.py

@@ -14,9 +14,7 @@
 REGISTRY_QUERY_URL = (
     "https://hub.docker.com/v2/repositories/mambaorg/micromamba/tags?page_size=200"
 )
-GITHUB_OUTPUT = (
-    Path(os.environ["GITHUB_OUTPUT"]) if "GITHUB_OUTPUT" in os.environ else None
-)
+GITHUB_ENV = Path(os.environ["GITHUB_ENV"]) if "GITHUB_ENV" in os.environ else None
 
 
 class DockerImageTag(NamedTuple):
@@ -135,11 +133,10 @@ def main():
     if updated_image_tag == current_image_tag:
         print("No update needed for Dockerfile.")
     else:
-        new_docker_tag = update_dockerfile(
-            lines,
-            line_number,
-            updated_image_tag,
-        )
+        new_docker_tag = update_dockerfile(lines, line_number, updated_image_tag)
+        if GITHUB_ENV:
+            with open(GITHUB_ENV, "a") as f:
+                f.write(f"NEW_DOCKER_TAG={new_docker_tag}\n")
         print(f"✅ Update successful: {new_docker_tag}")
 
     print("Updating workflow file...")