actions: Use github action to do Fixes/Length/Subsystem check

The commit checks does not need to wait for CI dependencies to be
installed, It's a waste of time. we need show errors ASAP.

And we should display as many problems as possible at once
Fixes: #487

Signed-off-by: Tim Zhang <tim@hyper.sh>

.github/workflows/commit-message-check.yaml

@@ -0,0 +1,65 @@
+name: Commit Message Check
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+env:
+  error_msg: |+
+    See the document below for help on formatting commits for the project.
+
+    https://github.com/kata-containers/community/blob/master/CONTRIBUTING.md#patch-forma
+
+jobs:
+  commit-message-check:
+    runs-on: ubuntu-latest
+    name: Commit Message Check
+    steps:
+    - name: Get PR Commits
+      id: 'get-pr-commits'
+      uses: tim-actions/get-pr-commits@v1.0.0
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: DCO Check
+      uses: tim-actions/dco@2fd0504dc0d27b33f542867c300c60840c6dcb20
+      with:
+        commits: ${{ steps.get-pr-commits.outputs.commits }}
+
+    - name: Check Subject Line Length
+      uses: tim-actions/commit-message-checker-with-regex@v0.3.0
+      with:
+        commits: ${{ steps.get-pr-commits.outputs.commits }}
+        pattern: '^.{0,75}(\n.*)*$'
+        error: 'Subject too long (max 75)'
+        post_error: ${{ env.error_msg }}
+
+    - name: Check Body Line Length
+      if: ${{ success() || failure() }}
+      uses: tim-actions/commit-message-checker-with-regex@v0.3.0
+      with:
+        commits: ${{ steps.get-pr-commits.outputs.commits }}
+        pattern: '^.+(\n.{0,72})*$|^.+\n\s*[^a-zA-Z\s\n]'
+        error: 'Body line too long (max 72)'
+        post_error: ${{ env.error_msg }}
+
+    - name: Check Fixes
+      if: ${{ success() || failure() }}
+      uses: tim-actions/commit-message-checker-with-regex@v0.3.0
+      with:
+        commits: ${{ steps.get-pr-commits.outputs.commits }}
+        pattern: '\s*Fixes\s*:?\s*(#\d+|github\.com\/kata-containers\/[a-z-.]*#\d+)'
+        flags: 'i'
+        error: 'No "Fixes" found'
+        post_error: ${{ env.error_msg }}
+
+    - name: Check Subsystem
+      if: ${{ success() || failure() }}
+      uses: tim-actions/commit-message-checker-with-regex@v0.3.0
+      with:
+        commits: ${{ steps.get-pr-commits.outputs.commits }}
+        pattern: '^[\h]*([^:\h]+)[\h]*:'
+        error: 'Failed to find subsystem in subject'
+        post_error: ${{ env.error_msg }}

.github/workflows/dco-check.yaml

@@ -1,22 +0,0 @@
-name: DCO check
-on: 
-  pull_request:
-    types:
-      - opened
-      - reopened
-      - synchronize
-
-jobs:
-  dco_check_job:
-    runs-on: ubuntu-latest
-    name: DCO Check
-    steps:
-    - name: Get PR Commits
-      id: 'get-pr-commits'
-      uses: tim-actions/get-pr-commits@ed97a21c3f83c3417e67a4733ea76887293a2c8f
-      with:
-        token: ${{ secrets.GITHUB_TOKEN }}
-    - name: DCO Check
-      uses: tim-actions/dco@2fd0504dc0d27b33f542867c300c60840c6dcb20
-      with:
-        commits: ${{ steps.get-pr-commits.outputs.commits }}