swiftlint build plugin (#1318)

Task/Issue URL: https://app.asana.com/0/1205944207430351/1204377796839424/f
BSK PR: duckduckgo/BrowserServicesKit#393

.github/workflows/pr.yml

@@ -24,7 +24,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: SwiftLint
-        uses: docker://norionomura/swiftlint:0.53.0
+        uses: docker://norionomura/swiftlint:0.54.0
         with:
           args: swiftlint --reporter github-actions-logging --strict
 
@@ -133,6 +133,7 @@ jobs:
           -scheme "${{ matrix.scheme }}" \
           -derivedDataPath "DerivedData" \
           -configuration "CI" \
+          -skipPackagePluginValidation \
           ENABLE_TESTABILITY=true \
           ONLY_ACTIVE_ARCH=${{ matrix.active-arch }} \
           "-skip-testing:${{ matrix.integration-tests-target }}" \
@@ -146,6 +147,7 @@ jobs:
           -scheme "${{ matrix.scheme }}" \
           -derivedDataPath "DerivedData" \
           -configuration "CI" \
+          -skipPackagePluginValidation \
           ENABLE_TESTABILITY=true \
           ONLY_ACTIVE_ARCH=${{ matrix.active-arch }} \
           "-only-testing:${{ matrix.integration-tests-target }}" \
@@ -320,6 +322,7 @@ jobs:
           -scheme "${{ matrix.scheme }}" \
           -derivedDataPath "DerivedData" \
           -configuration "Release" \
+          -skipPackagePluginValidation \
           | tee release-xcodebuild.log \
           | xcbeautify
 

.swiftlint.yml

@@ -1,3 +1,5 @@
+allow_zero_lintable_files: true
+
 disabled_rules:
   - no_space_in_method_call
   - multiple_closures_with_trailing_closure
@@ -9,9 +11,12 @@ disabled_rules:
   - implicit_getter
   - function_parameter_count
   - trailing_comma
+  - nesting
+  - opening_brace
 
 opt_in_rules:
   - file_header
+  - explicit_init
 
 custom_rules:
   explicit_non_final_class:
@@ -41,15 +46,13 @@ file_length:
 type_body_length:
   warning: 500
   error: 500
-nesting:
-  type_level: 2
 large_tuple:
   warning: 4
   error: 5
 file_header:
   required_pattern: |
                     \/\/
-                    \/\/  .*?\.swift
+                    \/\/  SWIFTLINT_CURRENT_FILENAME
                     \/\/
                     \/\/  Copyright © \d{4} DuckDuckGo\. All rights reserved\.
                     \/\/
@@ -69,11 +72,8 @@ file_header:
 # General Config
 excluded:
   - DuckDuckGo/Common/Localizables/UserText.swift
-  - UnitTests
-  - IntegrationTests
   - LocalPackages/*/Package.swift
   - release
-  - UITests
   - vendor
   - DerivedData
   - .ruby-lsp