ci(github-action): fix commit check error

* load the full commit log when checkout
* do not raise error if no commit to check (e.g. master branch)

Author: Lee-W

.github/workflows/pythonpackage.yml

@@ -12,7 +12,9 @@ jobs:
         python-version: [3.6, 3.7, 3.8]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
+    - run: |
+        git fetch --prune --unshallow
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v1
       with:

scripts/test

@@ -11,4 +11,10 @@ ${PREFIX}isort --recursive --check-only commitizen tests
 ${PREFIX}flake8 commitizen/ tests/
 ${PREFIX}mypy commitizen/ tests/
 ${PREFIX}pydocstyle --convention=google --add-ignore=D1,D415
-${PREFIX}commitizen check --rev-range master..
+
+${PREFIX}commitizen check --rev-range master..HEAD || \
+if [ $$? == 3 ] ; then
+    exit 0;
+else
+    exit 1;
+fi