ci: Trigger black on python file changes only + autocommit (#139)

Co-authored-by: haidaraM <haidaraM@users.noreply.github.com>

.github/workflows/lint.yml

@@ -4,15 +4,32 @@ on:
   push:
     branches:
       - main
+    paths:
+      - '**.py'
   pull_request:
     branches:
       - main
+    paths:
+      - '**.py'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
 
 jobs:
   black:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+
       - uses: psf/black@stable
         with:
-          options: "--check --diff --color"
+          version: "~= 23.0" # https://black.readthedocs.io/en/stable/integrations/github_actions.html
+          options: ""
+
+      - uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: Autoformat code using black

README.md

@@ -202,6 +202,10 @@ The graphs are generated in the folder `tests/generated-svgs`. They are also gen
 in [Github Actions](https://github.com/haidaraM/ansible-playbook-grapher/actions). Feel free to look at them when
 submitting PRs.
 
+### Lint and format
+
+The project uses black to format the code. Run `black .` to format.
+
 ## License
 
 GNU General Public License v3.0 or later (Same as Ansible)

ansibleplaybookgrapher/graphbuilder.py

@@ -45,7 +45,6 @@ OPEN_PROTOCOL_HANDLERS = {
 class Grapher:
     def __init__(self, playbook_filenames: List[str]):
         """
-
         :param playbook_filenames: List of playbooks to graph
         """
         self.playbook_filenames = playbook_filenames

tests/requirements_tests.txt

@@ -2,3 +2,4 @@
 pytest==7.1.3
 pytest-cov==4.0.0
 pyquery==2.0.0
+black~=23.0

tests/test_graph.py

@@ -43,7 +43,6 @@ def test_get_all_tasks_nodes():
     :return:
     """
     play = PlayNode("play")
-
     role_1 = RoleNode("my_role_1")
     play.add_node("roles", role_1)