Update ruff formatter to work differently between forks and native branches (#821)

* add unformatted file

* test github action

* add conditional suggestion

* fix condition

* try again

* try again

* try diff output

* fork repo conditions

* fix format test

* helpful error message

* put it in the name

* shorten sentence

* fix formatting

* revert changes

* consistent behavior to skipping database tests

* ruff format

* verify none

* ruff format

* empty string or none condition

---------

Co-authored-by: Sung Won Chung <sung@datafold.com>
Co-authored-by: Dan Lawin <daniel@datafold.com>

Author: 3 people

.github/workflows/formatter.yml

@@ -21,13 +21,25 @@ jobs:
         uses: actions/checkout@v3
         if: github.event_name == 'workflow_dispatch'
 
-      - name: Check files using the ruff formatter
+      # This is used for forked PRs as write permissions are required to format files
+      - name: Run and commit changes with `ruff format .` locally on your forked branch to fix errors if they appear
+        if: ${{ github.event.pull_request.head.repo.fork == true }}
+        uses: chartboost/ruff-action@v1
+        id: ruff_formatter_suggestions
+        with:
+          args: format --diff
+
+      # This only runs if the PR is NOT from a forked repo
+      - name: Format files using ruff
+        if: ${{ github.event.pull_request.head.repo.fork == false }}
         uses: chartboost/ruff-action@v1
         id: ruff_formatter
         with:
           args: format
 
+      # This only runs if the PR is NOT from a forked repo
       - name: Auto commit ruff formatting
+        if: ${{ github.event.pull_request.head.repo.fork == false }}
         uses: stefanzweifel/git-auto-commit-action@v5
         with:
-          commit_message: 'style fixes by ruff'
+          commit_message: 'style fixes by ruff'

tests/test_dbt.py

@@ -46,6 +46,10 @@ def test_integration_basic_dbt(self):
             # 1 with a diff
             assert diff_string.count("  Rows Added    Rows Removed") == 1
 
+    @unittest.skipIf(
+        not os.environ.get("MOTHERDUCK_TOKEN"),
+        "MOTHERDUCK_TOKEN doesn't exist or is empty if this is run from a forked branch pull request",
+    )
     def test_integration_motherduck_dbt(self):
         artifacts_path = os.getcwd() + "/tests/dbt_artifacts"
         test_project_path = os.environ.get("DATA_DIFF_DBT_PROJ") or artifacts_path