Move static analysis to separate yml

Based on https://github.com/neo4j-php/neo4j-php-client/blob/7795af6a5c230b3ef2025c7a69143881b1ee0e32/.github/workflows/static-analysis.yml

Author: Wout Gevaert

.github/workflows/main.yml

@@ -27,7 +27,6 @@ jobs:
       COMPOSER_VERSION: 2
       INSTALL_PATH: php-cypher-dsl
       REPOSITORY_NAME: php-cypher-dsl
-      FIXER_RULES: "@PSR12,align_multiline_comment,array_indentation,blank_line_before_statement,no_unused_imports,no_useless_else,no_useless_return,ordered_imports,phpdoc_scalar,return_assignment,simplified_if_return,trailing_comma_in_multiline"
 
     steps:
       # https://getcomposer.org/download/
@@ -56,14 +55,8 @@ jobs:
       - name: Install dependencies
         run: composer update --working-dir ${{ env.INSTALL_PATH }}
 
-      - name: Run php-cs-fixer on src
-        run: composer exec -d ${{ env.INSTALL_PATH }} -- php-cs-fixer fix --dry-run --verbose --rules=${{ env.FIXER_RULES }} ./src
-
-      - name: Run php-cs-fixer on tests
-        run: composer exec -d ${{ env.INSTALL_PATH }} -- php-cs-fixer fix --dry-run --verbose --rules=${{ env.FIXER_RULES }} ./tests
-
       - name: Run unit tests
         run: composer test --working-dir ${{ env.INSTALL_PATH }}
 
       - name: Run mutation tests
-        run: composer infect --working-dir ${{ env.INSTALL_PATH }}
+        run: composer infect --working-dir ${{ env.INSTALL_PATH }}

.github/workflows/static-analysis.yml

@@ -0,0 +1,12 @@
+on: [ push, pull_request ]
+name: Lint
+jobs:
+  php-cs-fixer:
+    name: "php-cs-fixer"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: "PHP-CS-Fixer"
+        uses: docker://oskarstark/php-cs-fixer-ga:3.6.0
+        with:
+          args: --dry-run --rules="@PSR12,align_multiline_comment,array_indentation,blank_line_before_statement,no_unused_imports,no_useless_else,no_useless_return,ordered_imports,phpdoc_scalar,return_assignment,simplified_if_return,trailing_comma_in_multiline"