[workflow] moved pre-commit to post-commit (#2895)

.github/workflows/README.md

@@ -35,10 +35,9 @@ I will provide the details of each workflow below.
 
 ### Code Style Check
 
-| Workflow Name               | File name                      | Description                                                                                                |
-| --------------------------- | ------------------------------ | ---------------------------------------------------------------------------------------------------------- |
-| `Pre-commit`                | `pre_commit.yml`               | This workflow runs pre-commit checks for code style consistency for PRs.                                   |
-| `Report pre-commit failure` | `report_precommit_failure.yml` | This PR will put up a comment in the PR to explain the precommit failure and remedy if `Pre-commit` fails. |
+| Workflow Name | File name         | Description                                                                                                    |
+| ------------- | ----------------- | -------------------------------------------------------------------------------------------------------------- |
+| `post-commit` | `post_commit.yml` | This workflow runs pre-commit checks for changed files to achieve code style consistency after a PR is merged. |
 
 ### Unit Test
 
@@ -130,8 +129,7 @@ This file controls which CUDA versions will be checked against CUDA extenson bui
 ## Progress Log
 
 - [x] Code style check
-  - [x] pre-commit check
-  - [x] pre-commit failure report
+  - [x] post-commit check
 - [x] unit testing
   - [x] test on PR
   - [x] report test coverage

.github/workflows/pre_commit.yml → .github/workflows/post_commit.yml

-name: pre-commit
+name: post-commit
 
 on:
   pull_request:
+    types:
+        - closed
 
 jobs:
+  # this job will run after a PR is merged to run pre-commit on any changed file
+  # so that the user does not need to learn pre-commit and pre-commit can still
+  # be auto-executed by the workflow
   pre-commit:
     runs-on: ubuntu-latest
+    if: github.event.pull_request.merged == true && github.repository == 'hpcaitech/ColossalAI'
     steps:
     - uses: actions/checkout@v2
       with:
@@ -36,6 +42,11 @@ jobs:
           echo "$file was changed"
         done
 
+    # check out the main branch
+    - uses: actions/checkout@v2
+      with:
+        ref: 'main'
+
     - uses: actions/setup-python@v3
 
     - name: Cache pre-commit hooks
@@ -49,23 +60,32 @@ jobs:
         pip install pre-commit
         pre-commit install
 
-    - name: Run pre-commit on Changed Files
-      id: precommit
+    # run pre-commit on changed files
+    - name: Run Pre-commit
       run: |
         for file in ${{ steps.find-changed-files.outputs.all_changed_files }}; do
-          echo "======= running pre-commit on ${file} ======="
-          pre-commit run --files $file
+          pre-commit run --files $file || true
         done
 
-    - name: Save PR number
-      if: always()
-      env:
-        PR_NUMBER: ${{ github.event.number }}
+    # create commit for pre-commit
+    - name: Create commits
       run: |
-        mkdir -p ./pr
-        echo $PR_NUMBER > ./pr/pr_number
-    - uses: actions/upload-artifact@v3
-      if: always()
+        git config --global user.name 'github-actions'
+        git config --global user.email 'github-actions@github.com'
+        git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}
+        git add -A
+        git commit -am "[format] applied code formatting on changed files in pull request ${{ github.event.pull_request.number }}"
+
+    # create pull request
+    - name: Create Pull Request
+      id: cpr
+      uses: peter-evans/create-pull-request@v4
+      with:
+        branch: pre-commit-${{ github.event.pull_request.number }}
+        title: "[format] applied code formatting on changed files in PR ${{ github.event.pull_request.number }}"
+
+    - name: Enable Auto-merge for the New PR
+      uses: peter-evans/enable-pull-request-automerge@v2
       with:
-        name: pr_number
-        path: pr/
+        pull-request-number: ${{ steps.cpr.outputs.pull-request-number }}
+        merge-method: squash

.github/workflows/report_precommit_failure.yml

-name: Report Precommit Failure
-
-on:
-  workflow_run:
-    workflows: [pre-commit]
-    types:
-      - completed
-
-jobs:
-  # comment with a message on how to do pre-commit
-  # if the pre-commit check was not passed
-  report-precommit-failure:
-    runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
-    steps:
-      - name: 'Download artifact'
-        uses: actions/github-script@v6
-        with:
-          script: |
-            let allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
-               owner: context.repo.owner,
-               repo: context.repo.repo,
-               run_id: context.payload.workflow_run.id,
-            });
-            let matchArtifact = allArtifacts.data.artifacts.filter((artifact) => {
-              return artifact.name == "pr_number"
-            })[0];
-            let download = await github.rest.actions.downloadArtifact({
-               owner: context.repo.owner,
-               repo: context.repo.repo,
-               artifact_id: matchArtifact.id,
-               archive_format: 'zip',
-            });
-            let fs = require('fs');
-            fs.writeFileSync(`${process.env.GITHUB_WORKSPACE}/pr_number.zip`, Buffer.from(download.data));
-
-      - name: 'Unzip artifact'
-        run: unzip pr_number.zip
-
-      - name: 'Comment on PR'
-        uses: actions/github-script@v6
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          script: |
-            let fs = require('fs');
-            let issue_number = Number(fs.readFileSync('./pr_number'));
-            let owner = context.repo.owner;
-            let repo = context.repo.repo;
-            let run_id = context.payload.workflow_run.id;
-            let run_url = `https://github.com/${owner}/${repo}/actions/runs/${run_id}`
-            let body = `
-            Your pre-commit check failed, follow the steps to run pre-commit on your file for code style consistency.
-
-            1. install pre-commit via "pip install pre-commit"
-            2. install pre-commit hooks via "pre-commit install"
-            3. run pre-commit on file with format error via "pre-commit run --files path" by replacing "path" with the actual file path
-            4. commit and push to your branch
-
-            View your job at ${run_url}.
-            Read our "CONTRIBUTING.md" for more reference to the code style.
-            `;
-            await github.rest.issues.createComment({
-              owner: owner,
-              repo: repo,
-              issue_number: issue_number,
-              body: body
-            });