PYTHON-4541 Add automatic handling of python following version (#54)

Author: blink1073

python/publish/action.yml

@@ -7,7 +7,7 @@ inputs:
     required: true
   following_version:
     description: The following (dev) version
-    required: true
+    required: false
   version_bump_script:
     description: The version bump script
     default: hatch version
@@ -80,6 +80,7 @@ runs:
         TAG_TEMPLATE: ${{ inputs.tag_template }}
         PRODUCT_NAME: ${{ inputs.product_name }}
         DRY_RUN: ${{ inputs.dry_run }}
+        FOLLOWING_VERSION: ${{ inputs.following_version }}
     # https://packaging.python.org/en/latest/guides/publishing-package-distribution-releases-using-github-actions-ci-cd-workflows/#publishing-the-distribution-to-pypi
     - name: Publish distribution 📦 to PyPI
       if: inputs.dry_run == 'false'
@@ -107,11 +108,11 @@ runs:
       uses: mongodb-labs/drivers-github-tools/bump-version@v2
       if: inputs.dry_run == 'false'
       with:
-          version: ${{ inputs.following_version }}
+          version: ${{ steps.publish-script.outputs.following_version }}
           version_bump_script: ${{ inputs.version_bump_script }}
           working_directory: ${{ inputs.working_directory }}
     - name: Skip Setting following version
       shell: bash
       if: inputs.dry_run == 'true'
       run: |
-        echo "Dry run, not setting the following version: ${{ inputs.following_version }}" >> $GITHUB_STEP_SUMMARY
+        echo "Dry run, not setting the following version: ${{ steps.publish-script.outputs.following_version }}" >> $GITHUB_STEP_SUMMARY

python/publish/handle_following_version.py

@@ -0,0 +1,21 @@
+import sys
+from packaging.version import Version
+
+version = Version(sys.argv[1])
+new_version = None
+
+if version.is_devrelease:
+    # For dev releases, increment the dev release number.
+    new_version = f"{version.major}.{version.minor}.{version.micro}.dev{version.dev + 1}"
+elif version.is_prerelease:
+    # For pre releases, go back to dev release.
+    rel_type, rel_num = version.pre
+    new_version = f"{version.major}.{version.minor}.{version.micro}.{rel_type}{rel_num + 1}"
+elif version.micro == 0:
+    # For minor releases, go to next minor release.
+    new_version = f"{version.major}.{version.minor + 1}.0.dev0"
+else:
+    # For patch releases, go to the next patch release.
+    new_version = f"{version.major}.{version.minor}.{version.micro + 1}.dev0"
+
+print(str(new_version))

python/publish/publish.sh

@@ -2,6 +2,15 @@
 
 set -eux
 
+# Handle the following version.
+if [ -z "${FOLLOWING_VERSION}" ]; then
+    pip install packaging
+    pushd $GITHUB_ACTION_PATH
+    FOLLOWING_VERSION=$(python handle_following_version.py $VERSION)
+    popd
+fi
+echo "following_version=$FOLLOWING_VERSION" >> $GITHUB_OUTPUT
+
 if [ "$DRY_RUN" == "false" ]; then
     PUSH_CHANGES=true
     echo "Creating draft release with attached files"