feat(coding-standard): add ignore_warnings flag (#147)

By default, `phpcs` exits with a non-zero exit code when it finds warnings. We keep that default, but allow changing it.

Co-authored-by: Vitaliy Golomoziy <vitaliy.golomoziy@gmail.com>

coding-standard/action.yml

@@ -37,6 +37,11 @@ inputs:
     default: ""
     description: "The minimum severity required to display an error"
 
+  ignore_warnings:
+    description: 'Whether or not the action should fail on warnings, defaults to false (fails on warnings)'
+    default: 'false'
+    required: false
+
 runs:
   using: composite
   steps:
@@ -57,6 +62,23 @@ runs:
         tools: composer:v${{ inputs.composer_version }}
         coverage: none
 
+    - name: Get Composer Version
+      uses: mage-os/github-actions/get-composer-version@main
+      id: get-composer-version
+
+    - name: Check if allow-plugins option is available for this version of composer
+      uses: mage-os/github-actions/semver-compare@main
+      with:
+        version: 2.2
+        compare_against: ${{ steps.get-composer-version.outputs.version }}
+      id: is-allow-plugins-available
+
+    - name: Enable dealerdirect/phpcodesniffer-composer-installer plugin
+      shell: bash
+      working-directory: standard
+      run: composer config allow-plugins.dealerdirect/phpcodesniffer-composer-installer  true --global
+      if: steps.is-allow-plugins-available.outputs.result < 1
+
     - name: Install Coding Standard
       shell: bash
       working-directory: standard
@@ -67,6 +89,12 @@ runs:
       working-directory: standard
       run: vendor/bin/phpcs --config-set installed_paths ${{ github.workspace }}/standard/vendor/magento/magento-coding-standard,${{ github.workspace }}/standard/vendor/phpcompatibility/php-compatibility
 
+    - name: Set ignore warnings flag
+      shell: bash
+      working-directory: standard
+      run: vendor/bin/phpcs --config-set ignore_warnings_on_exit 1
+      if: inputs.ignore_warnings == 'true'
+
     - name: Get Changed Files
       shell: bash
       working-directory: project