Set working directory to workspace root directory

SwiftLintXcode.xcodeproj/project.pbxproj

@@ -9,6 +9,7 @@
 /* Begin PBXBuildFile section */
 		0498717F1CB27F8900C5F7B5 /* SwiftLintXcodeTRVSXcode.m in Sources */ = {isa = PBXBuildFile; fileRef = 0498717E1CB27F8900C5F7B5 /* SwiftLintXcodeTRVSXcode.m */; };
 		049871811CB28EBF00C5F7B5 /* Formatter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 049871801CB28EBF00C5F7B5 /* Formatter.swift */; };
+		04DFAD471CB508D1007998DF /* SwiftLintXcodeIDEHelper.m in Sources */ = {isa = PBXBuildFile; fileRef = 04DFAD461CB508D1007998DF /* SwiftLintXcodeIDEHelper.m */; };
 		04DFAD491CB50BC8007998DF /* errorHelper.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04DFAD481CB50BC8007998DF /* errorHelper.swift */; };
 		04E4BF341CB25D3200BC7305 /* SwiftLintXcode.xcscheme in Resources */ = {isa = PBXBuildFile; fileRef = 04E4BF331CB25D3200BC7305 /* SwiftLintXcode.xcscheme */; };
 		04E4BF361CB25D3200BC7305 /* SwiftLintXcode.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04E4BF351CB25D3200BC7305 /* SwiftLintXcode.swift */; };
@@ -21,6 +22,8 @@
 		0498717D1CB27F8900C5F7B5 /* SwiftLintXcodeTRVSXcode.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SwiftLintXcodeTRVSXcode.h; sourceTree = "<group>"; };
 		0498717E1CB27F8900C5F7B5 /* SwiftLintXcodeTRVSXcode.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SwiftLintXcodeTRVSXcode.m; sourceTree = "<group>"; };
 		049871801CB28EBF00C5F7B5 /* Formatter.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Formatter.swift; sourceTree = "<group>"; };
+		04DFAD451CB508D1007998DF /* SwiftLintXcodeIDEHelper.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SwiftLintXcodeIDEHelper.h; sourceTree = "<group>"; };
+		04DFAD461CB508D1007998DF /* SwiftLintXcodeIDEHelper.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SwiftLintXcodeIDEHelper.m; sourceTree = "<group>"; };
 		04DFAD481CB50BC8007998DF /* errorHelper.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = errorHelper.swift; sourceTree = "<group>"; };
 		04E4BF2F1CB25D3100BC7305 /* SwiftLintXcode.xcplugin */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = SwiftLintXcode.xcplugin; sourceTree = BUILT_PRODUCTS_DIR; };
 		04E4BF331CB25D3200BC7305 /* SwiftLintXcode.xcscheme */ = {isa = PBXFileReference; lastKnownFileType = text.xml; name = SwiftLintXcode.xcscheme; path = SwiftLintXcode.xcodeproj/xcshareddata/xcschemes/SwiftLintXcode.xcscheme; sourceTree = SOURCE_ROOT; };
@@ -52,6 +55,8 @@
 			children = (
 				0498717D1CB27F8900C5F7B5 /* SwiftLintXcodeTRVSXcode.h */,
 				0498717E1CB27F8900C5F7B5 /* SwiftLintXcodeTRVSXcode.m */,
+				04DFAD451CB508D1007998DF /* SwiftLintXcodeIDEHelper.h */,
+				04DFAD461CB508D1007998DF /* SwiftLintXcodeIDEHelper.m */,
 				04E4BF351CB25D3200BC7305 /* SwiftLintXcode.swift */,
 				04E4BF371CB25D3200BC7305 /* NSObject_Extension.swift */,
 				04E4BF401CB273A700BC7305 /* SaveHook.swift */,
@@ -142,6 +147,7 @@
 				0498717F1CB27F8900C5F7B5 /* SwiftLintXcodeTRVSXcode.m in Sources */,
 				04E4BF361CB25D3200BC7305 /* SwiftLintXcode.swift in Sources */,
 				049871811CB28EBF00C5F7B5 /* Formatter.swift in Sources */,
+				04DFAD471CB508D1007998DF /* SwiftLintXcodeIDEHelper.m in Sources */,
 				04DFAD491CB50BC8007998DF /* errorHelper.swift in Sources */,
 				04E4BF411CB273A700BC7305 /* SaveHook.swift in Sources */,
 				04E4BF381CB25D3200BC7305 /* NSObject_Extension.swift in Sources */,

SwiftLintXcode/Formatter.swift

@@ -11,8 +11,8 @@ import Cocoa
 
 final class Formatter {
     static var sharedInstance = Formatter()
-    private static let pathExtension = "SwiftLintXcode"
 
+    private static let pathExtension = "SwiftLintXcode"
     private let fileManager = NSFileManager.defaultManager()
 
     private struct CursorPosition {
@@ -71,12 +71,18 @@ final class Formatter {
     }
 
     private func formatString(string: String) throws -> String {
+        guard let workspaceRootDirectory = SwiftLintXcodeIDEHelper.currentWorkspaceURL()?.URLByDeletingLastPathComponent?.path else {
+            throw errorWithMessage("Cannot determine project directory.")
+        }
+
         return try withTempporaryFile { (filePath) in
             try string.writeToFile(filePath, atomically: false, encoding: NSUTF8StringEncoding)
-            let swiftlintPath = try self.getExecutableOnPath("swiftlint")
+            let swiftlintPath = try self.getExecutableOnPath(name: "swiftlint", workingDirectory: workspaceRootDirectory)
-            let task = NSTask.launchedTaskWithLaunchPath(swiftlintPath, arguments: [
+            let task = NSTask()
-                "autocorrect", "--path", filePath
+            task.launchPath = swiftlintPath
-            ])
+            task.arguments = ["autocorrect", "--path", filePath]
+            task.currentDirectoryPath = workspaceRootDirectory
+            task.launch()
             task.waitUntilExit()
             if task.terminationStatus != 0 {
                 throw errorWithMessage("Executing swiftlint exited with non-zero status.")
@@ -85,13 +91,14 @@ final class Formatter {
         }
     }
 
-    private func getExecutableOnPath(name: String) throws -> String {
+    private func getExecutableOnPath(name name: String, workingDirectory: String) throws -> String {
         let pipe = NSPipe()
         let task = NSTask()
         task.launchPath = "/bin/bash"
         task.arguments = [
             "-l", "-c", "which \(name)"
         ]
+        task.currentDirectoryPath = workingDirectory
         task.standardOutput = pipe
         task.launch()
         task.waitUntilExit()

SwiftLintXcode/SwiftLintXcode-Bridging-Header.h

@@ -3,3 +3,4 @@
 //
 
 #import "SwiftLintXcodeTRVSXcode.h"
+#import "SwiftLintXcodeIDEHelper.h"

SwiftLintXcode/SwiftLintXcodeIDEHelper.h

@@ -0,0 +1,15 @@
+//
+//  SwiftLintXcodeIDEHelper.h
+//  SwiftLintXcode
+//
+//  Created by yuya.tanaka on 2016/04/06.
+//  Copyright © 2016年 Yuya Tanaka. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface SwiftLintXcodeIDEHelper : NSObject
+
++ (nullable NSURL *)currentWorkspaceURL;
+
+@end

SwiftLintXcode/SwiftLintXcodeIDEHelper.m

@@ -0,0 +1,22 @@
+//
+//  SwiftLintXcodeIDEHelper.m
+//  SwiftLintXcode
+//
+//  Created by yuya.tanaka on 2016/04/06.
+//  Copyright © 2016年 Yuya Tanaka. All rights reserved.
+//
+
+#import "SwiftLintXcodeIDEHelper.h"
+#import "SwiftLintXcodeTRVSXcode.h"
+@import Cocoa;
+
+@implementation SwiftLintXcodeIDEHelper
+
++ (nullable NSURL *)currentWorkspaceURL
+{
+    IDEWorkspaceWindowController *workspaceWindowController = (IDEWorkspaceWindowController *)[[NSApp keyWindow] windowController];
+    IDEWorkspace *workspace = [workspaceWindowController valueForKey:@"_workspace"];
+    return workspace.representingFilePath.fileURL;
+}
+
+@end