Only run sdef locally - not github actions

Author: pjrobertson

iTerm2.xcodeproj/project.pbxproj

@@ -30,7 +30,7 @@
 			outputFiles = (
 				"$(DERIVED_FILES_DIR)/$(INPUT_FILE_BASE).h",
 			);
-			script = "sdef \"$INPUT_FILE_PATH\" | sdp -fh -o \"$DERIVED_FILES_DIR\" --basename \"$INPUT_FILE_BASE\" --bundleid `defaults read \"$INPUT_FILE_PATH/Contents/Info\" CFBundleIdentifier`";
+			script = "if [[ -z \"${GITHUB_ACTIONS}\" ]]; then\nsdef \"$INPUT_FILE_PATH\" | sdp -fh -o \"$DERIVED_FILES_DIR\" --basename \"$INPUT_FILE_BASE\" --bundleid `defaults read \"$INPUT_FILE_PATH/Contents/Info\" CFBundleIdentifier`\nfi\n";
 		};
 /* End PBXBuildRule section */