Skip SwiftLint and SwiftFormat runs on CI build

Unfortunately, there seems to be no simpler way to tell a script in Xcode that it runs on CI.

.gitignore

@@ -69,3 +69,8 @@ fastlane/Preview.html
 fastlane/screenshots
 fastlane/test_output
 .DS_Store
+
+# Environment
+#
+# The Continuous Integration environment will create this file. It avoids specific "Run Script" phases while building.
+.ci-env

.travis.yml

@@ -6,11 +6,10 @@ addons:
     - go
     - gnupg2
     - pass
-    - swiftformat
-    - swiftlint
     update: true
 before_install:
   - echo -e "machine github.com\n  login $GITHUB_ACCESS_TOKEN" >> ~/.netrc
+  - touch .ci-env
 install:
   - gem install bundler
   - bundle install

pass.xcodeproj/project.pbxproj

@@ -1051,8 +1051,8 @@
 				A26700191EEC450100176B8A /* Embed App Extensions */,
 				A26075921EEC6F34005DB03E /* Embed Frameworks */,
 				9AF6A4F532EB900EE22C80EA /* [CP] Embed Pods Frameworks */,
-				3005F34F24A9143C000519B5 /* ShellScript */,
+				3005F34F24A9143C000519B5 /* SwiftFormat */,
-				308800C124EB0D3600E87ED3 /* ShellScript */,
+				308800C124EB0D3600E87ED3 /* SwiftLint */,
 			);
 			buildRules = (
 			);
@@ -1279,7 +1279,7 @@
 			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
 			showEnvVarsInLog = 0;
 		};
-		3005F34F24A9143C000519B5 /* ShellScript */ = {
+		3005F34F24A9143C000519B5 /* SwiftFormat */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
@@ -1288,15 +1288,16 @@
 			);
 			inputPaths = (
 			);
+			name = SwiftFormat;
 			outputFileListPaths = (
 			);
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "SWIFTFORMAT_VERSION=\"0.45.*\"\n\nif which swiftformat > /dev/null; then\n  if [[ \"$(swiftformat --version)\" == $SWIFTFORMAT_VERSION ]]; then\n    swiftformat .\n  else\n    echo \"Failure: SwiftFormat $SWIFTFORMAT_VERSION is required. Install it or update the build script to use a newer version.\"\n    exit 1\n  fi\nelse\n  echo \"Failure: SwiftFormat not installed. Get it via 'brew install swiftformat'.\"\n  exit 2\nfi\n";
+			shellScript = ". \"${SRCROOT}/scripts/swiftformat.sh\"\n";
 		};
-		308800C124EB0D3600E87ED3 /* ShellScript */ = {
+		308800C124EB0D3600E87ED3 /* SwiftLint */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
@@ -1305,13 +1306,14 @@
 			);
 			inputPaths = (
 			);
+			name = SwiftLint;
 			outputFileListPaths = (
 			);
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "SWIFTLINT_VERSION=\"0.40.*\"\n\nif which swiftlint > /dev/null; then\n  if [[ \"$(swiftlint version)\" == $SWIFTLINT_VERSION ]]; then\n    swiftlint\n  else\n    echo \"Failure: SwiftLint $SWIFTLINT_VERSION is required. Install it or update the build script to use a newer version.\"\n    exit 1\n  fi\nelse\n  echo \"Failure: SwiftLint not installed. Get it via 'brew install swiftlint'.\"\n  exit 2\nfi\n";
+			shellScript = ". \"${SRCROOT}/scripts/swiftlint.sh\"\n";
 		};
 		3EFC287772C1D2B2762FAC45 /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;

scripts/swiftformat.sh

@@ -0,0 +1,24 @@
+SWIFTFORMAT_VERSION="0.45.*"
+
+if [[ -f "${SRCROOT}/.ci-env" ]]; then
+  echo "Running in a Continuous Integration environment. Formatting is skipped."
+  return
+fi
+
+if [[ "${CONFIGURATION}" != "Debug" ]]; then
+  echo "Running during a release build. Formatting is skipped."
+  return
+fi
+
+if which swiftformat > /dev/null; then
+  if [[ "$(swiftformat --version)" == $SWIFTFORMAT_VERSION ]]; then
+    swiftformat .
+  else
+    echo "Failure: SwiftFormat $SWIFTFORMAT_VERSION is required. Install it or update the build script to use a newer version."
+    exit 1
+  fi
+else
+  echo "Failure: SwiftFormat not installed. Get it via 'brew install swiftformat'."
+  exit 2
+fi
+

scripts/swiftlint.sh

@@ -0,0 +1,24 @@
+SWIFTLINT_VERSION="0.40.*"
+
+if [[ -f "${SRCROOT}/.ci-env" ]]; then
+  echo "Running in a Continuous Integration environment. Linting is skipped."
+  return
+fi
+
+if [[ "${CONFIGURATION}" != "Debug" ]]; then
+  echo "Running during a release build. Linting is skipped."
+  return
+fi
+
+if which swiftlint > /dev/null; then
+  if [[ "$(swiftlint version)" == $SWIFTLINT_VERSION ]]; then
+    swiftlint --strict
+  else
+    echo "Failure: SwiftLint $SWIFTLINT_VERSION is required. Install it or update the build script to use a newer version."
+    exit 1
+  fi
+else
+  echo "Failure: SwiftLint not installed. Get it via 'brew install swiftlint'."
+  exit 2
+fi
+