Merge pull request #93 from Carthage/modify-escaping-behavior

Actually escape whitespace characters instead of quoting the entire string

Author: mdiep

ReactiveTask.xcodeproj/project.pbxproj

@@ -8,6 +8,7 @@
 
 /* Begin PBXBuildFile section */
 		CD52F6441DD0411100B2F764 /* Availability.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD52F6431DD0411100B2F764 /* Availability.swift */; };
+		CD72E5711E7A4A4800E2DE29 /* StringExtensionSpec.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD72E5701E7A4A4800E2DE29 /* StringExtensionSpec.swift */; };
 		D02130921AF87B6500B9EC20 /* Result.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D02130911AF87B6500B9EC20 /* Result.framework */; };
 		D0BFEA5E1A2D1E5E00E23194 /* ReactiveTask.h in Headers */ = {isa = PBXBuildFile; fileRef = D0BFEA5D1A2D1E5E00E23194 /* ReactiveTask.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		D0BFEA641A2D1E5E00E23194 /* ReactiveTask.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D0BFEA581A2D1E5E00E23194 /* ReactiveTask.framework */; };
@@ -31,6 +32,7 @@
 
 /* Begin PBXFileReference section */
 		CD52F6431DD0411100B2F764 /* Availability.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Availability.swift; sourceTree = "<group>"; };
+		CD72E5701E7A4A4800E2DE29 /* StringExtensionSpec.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = StringExtensionSpec.swift; sourceTree = "<group>"; };
 		D02130911AF87B6500B9EC20 /* Result.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; path = Result.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		D0BFEA581A2D1E5E00E23194 /* ReactiveTask.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = ReactiveTask.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		D0BFEA5C1A2D1E5E00E23194 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -132,6 +134,7 @@
 		D0BFEA671A2D1E5E00E23194 /* ReactiveTaskTests */ = {
 			isa = PBXGroup;
 			children = (
+				CD72E5701E7A4A4800E2DE29 /* StringExtensionSpec.swift */,
 				D0BFEAA11A2D212800E23194 /* TaskSpec.swift */,
 				D0BFEA681A2D1E5E00E23194 /* Supporting Files */,
 			);
@@ -336,6 +339,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				D0BFEAA21A2D212800E23194 /* TaskSpec.swift in Sources */,
+				CD72E5711E7A4A4800E2DE29 /* StringExtensionSpec.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

Sources/Task.swift

@@ -46,19 +46,21 @@ public struct Task {
 	}
 }
 
-private extension String {
-	var escaped: String {
-		if rangeOfCharacter(from: .whitespaces) != nil {
-			return "\"\(self)\""
-		} else {
-			return self
-		}
+extension String {
+	private static let whitespaceRegularExpression = try! NSRegularExpression(pattern: "\\s")
+
+	var escapingWhitespaces: String {
+		return String.whitespaceRegularExpression.stringByReplacingMatches(
+			in: self,
+			range: NSRange(location: 0, length: self.utf16.count),
+			withTemplate: "\\\\$0"
+		)
 	}
 }
 
 extension Task: CustomStringConvertible {
 	public var description: String {
-		return "\(launchPath) \(arguments.map { $0.escaped }.joined(separator: " "))"
+		return "\(launchPath) \(arguments.map { $0.escapingWhitespaces }.joined(separator: " "))"
 	}
 }
 

Tests/ReactiveTaskTests/StringExtensionSpec.swift

@@ -0,0 +1,18 @@
+import Quick
+import Nimble
+@testable import ReactiveTask
+
+class StringExtensionSpec: QuickSpec {
+	override func spec() {
+		describe("escapingWhitespaces") {
+			it("should escape whitespace characters") {
+				expect("a b c".escapingWhitespaces).to(equal("a\\ b\\ c"))
+				expect("d\te\tf".escapingWhitespaces).to(equal("d\\\te\\\tf"))
+			}
+
+			it("should not change the original string if it does not contain whitespaces") {
+				expect("ReactiveTask").to(equal("ReactiveTask"))
+			}
+		}
+	}
+}