ajstarks · June 8, 2015 22:41
diff --git a/go2xcode.go b/go2xcode.go
 // Copyright 2015 Google Inc. All Rights Reserved.
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //     http://www.apache.org/licenses/LICENSE-2.0
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 // Package main contains a program that converts a Go package
 // into an XCode project that targets iOS.
 // Usage:
 //
 //    go2xcode <pkg> [-o]
 //
 package main

 import (
 	"flag"
 	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"strings"
 )

 var o = flag.String("o", "", "directory to output the Xcode project; by default pwd")
 var verbose = flag.Bool("v", false, "trace build steps")

 func main() {
 	flag.Parse()
 	pkg := "."
 	if args := flag.Args(); len(args) > 0 {
 		pkg = args[0]
 	}
 	// main.xcodeproj/project.pbxproj
 	// main (TODO: build the fat binary)
 	// Info.plist
 	// Images.xcassets/AppIcon.appiconset/Contents.json
 	dir, err := ioutil.TempDir("", "go2xcode")
 	if err != nil {
 		log.Fatalln(err)
 	}
 	defer os.RemoveAll(dir)

 	// TODO(jbd): Build and add binary.
 	layout := map[string][]byte{
 		filepath.Join(dir, "main.xcodeproj/project.pbxproj"):                        projPbxproj,
 		filepath.Join(dir, "main/Info.plist"):                                       infoPlist,
 		filepath.Join(dir, "main/Images.xcassets/AppIcon.appiconset/Contents.json"): constentsJSON,
 	}

 	for dst, v := range layout {
 		trace("make the workspace at %v", dst)
 		if err := touchAndWrite(dst, v); err != nil {
 			log.Fatalf("failed to touch and write to %v; err = %v", dst, err)
 		}
 	}

 	// TODO(jbd): Build darwin/arm and darwin/arm64 cross compilers.

 	trace("build arm binary in %v", dir)
 	cmd := exec.Command("go", "build", "-o", filepath.Join(dir, "main-arm"), pkg)
 	cmd.Env = []string{
 		"GOOS=darwin",
 		"GOARCH=arm",
 		"CGO_ENABLED=1",
 		"GOPATH=" + goEnv("GOPATH"),
 	}
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
 	if err := cmd.Run(); err != nil {
 		log.Fatalln(err)
 	}

 	trace("build arm64 binary in %v", dir)
 	cmd = exec.Command("go", "build", "-o", filepath.Join(dir, "main-arm64"), pkg)
 	cmd.Env = []string{
 		"GOOS=darwin",
 		"GOARCH=arm64",
 		"CGO_ENABLED=1",
 		"GOPATH=" + goEnv("GOPATH"),
 	}
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
 	if err := cmd.Run(); err != nil {
 		log.Fatalln(err)
 	}

 	trace("make fat binary in %v", dir)
 	cmd = exec.Command(
 		"lipo",
 		"-create",
 		filepath.Join(dir, "main-arm"),
 		filepath.Join(dir, "main-arm64"),
 		"-o", filepath.Join(dir, "main/main"),
 	)
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
 	if err := cmd.Run(); err != nil {
 		log.Fatalln(err)
 	}

 	trace("remove arm binary")
 	if err := os.Remove(filepath.Join(dir, "main-arm")); err != nil {
 		log.Fatalln(err)
 	}

 	trace("remove arm64 binary")
 	if err := os.Remove(filepath.Join(dir, "main-arm64")); err != nil {
 		log.Fatalln(err)
 	}

 	// TODO(jbd): Copy one by one if Rename fails due to temp dir
 	// being on a different device.
 	if *o == "" {
 		*o = "."
 	}

 	dst := filepath.Join(*o, "xcode")
 	trace("remove %d", dst)
 	if err := os.RemoveAll(dst); err != nil {
 		log.Fatalln(err)

 	}

 	trace("rename %v to %v", dir, dst)
 	if err := os.Rename(dir, dst); err != nil {
 		log.Fatalln(err)
 	}
 }

 func trace(format string,  v ...interface{}) {
 	if *verbose {
 		log.Printf(format, v...)
 	}
 }

 func touchAndWrite(dst string, data []byte) error {
 	if err := os.MkdirAll(filepath.Dir(dst), 0775|os.ModeDir); err != nil {
 		return err
 	}
 	return ioutil.WriteFile(dst, data, 0644)
 }

 func goEnv(name string) string {
 	if val := os.Getenv(name); val != "" {
 		return val
 	}
 	val, err := exec.Command("go", "env", name).Output()
 	if err != nil {
 		log.Fatalln(err)
 	}
 	return strings.TrimSpace(string(val))
 }

 var infoPlist = []byte(`<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
  <key>CFBundleDevelopmentRegion</key>
  <string>en</string>
  <key>CFBundleExecutable</key>
  <string>main</string>
  <key>CFBundleIdentifier</key>
  <string>org.golang.todo.$(PRODUCT_NAME:rfc1034identifier)</string>
  <key>CFBundleInfoDictionaryVersion</key>
  <string>6.0</string>
  <key>CFBundleName</key>
  <string>$(PRODUCT_NAME)</string>
  <key>CFBundlePackageType</key>
  <string>APPL</string>
  <key>CFBundleShortVersionString</key>
  <string>1.0</string>
  <key>CFBundleSignature</key>
  <string>????</string>
  <key>CFBundleVersion</key>
  <string>1</string>
  <key>LSRequiresIPhoneOS</key>
  <true/>
  <key>UILaunchStoryboardName</key>
  <string>LaunchScreen</string>
  <key>UIRequiredDeviceCapabilities</key>
  <array>
    <string>armv7</string>
  </array>
  <key>UISupportedInterfaceOrientations</key>
  <array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
  </array>
  <key>UISupportedInterfaceOrientations~ipad</key>
  <array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationPortraitUpsideDown</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
  </array>
 </dict>
 </plist>
 `)

 var projPbxproj = []byte(`// !$*UTF8*$!
 {
  archiveVersion = 1;
  classes = {
  };
  objectVersion = 46;
  objects = {

 /* Begin PBXBuildFile section */
    254BB84F1B1FD08900C56DE9 /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 254BB84E1B1FD08900C56DE9 /* Images.xcassets */; };
    254BB8681B1FD16500C56DE9 /* main in Resources */ = {isa = PBXBuildFile; fileRef = 254BB8671B1FD16500C56DE9 /* main */; };
 /* End PBXBuildFile section */

 /* Begin PBXFileReference section */
    254BB83E1B1FD08900C56DE9 /* main.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = main.app; sourceTree = BUILT_PRODUCTS_DIR; };
    254BB8421B1FD08900C56DE9 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
    254BB84E1B1FD08900C56DE9 /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Images.xcassets; sourceTree = "<group>"; };
    254BB8671B1FD16500C56DE9 /* main */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.executable"; path = main; sourceTree = "<group>"; };
 /* End PBXFileReference section */

 /* Begin PBXGroup section */
    254BB8351B1FD08900C56DE9 = {
      isa = PBXGroup;
      children = (
        254BB8401B1FD08900C56DE9 /* main */,
        254BB83F1B1FD08900C56DE9 /* Products */,
      );
      sourceTree = "<group>";
      usesTabs = 0;
    };
    254BB83F1B1FD08900C56DE9 /* Products */ = {
      isa = PBXGroup;
      children = (
        254BB83E1B1FD08900C56DE9 /* main.app */,
      );
      name = Products;
      sourceTree = "<group>";
    };
    254BB8401B1FD08900C56DE9 /* main */ = {
      isa = PBXGroup;
      children = (
        254BB8671B1FD16500C56DE9 /* main */,
        254BB84E1B1FD08900C56DE9 /* Images.xcassets */,
        254BB8411B1FD08900C56DE9 /* Supporting Files */,
      );
      path = main;
      sourceTree = "<group>";
    };
    254BB8411B1FD08900C56DE9 /* Supporting Files */ = {
      isa = PBXGroup;
      children = (
        254BB8421B1FD08900C56DE9 /* Info.plist */,
      );
      name = "Supporting Files";
      sourceTree = "<group>";
    };
 /* End PBXGroup section */

 /* Begin PBXNativeTarget section */
    254BB83D1B1FD08900C56DE9 /* main */ = {
      isa = PBXNativeTarget;
      buildConfigurationList = 254BB8611B1FD08900C56DE9 /* Build configuration list for PBXNativeTarget "main" */;
      buildPhases = (
        254BB83C1B1FD08900C56DE9 /* Resources */,
      );
      buildRules = (
      );
      dependencies = (
      );
      name = main;
      productName = main;
      productReference = 254BB83E1B1FD08900C56DE9 /* main.app */;
      productType = "com.apple.product-type.application";
    };
 /* End PBXNativeTarget section */

 /* Begin PBXProject section */
    254BB8361B1FD08900C56DE9 /* Project object */ = {
      isa = PBXProject;
      attributes = {
        LastUpgradeCheck = 0630;
        ORGANIZATIONNAME = Developer;
        TargetAttributes = {
          254BB83D1B1FD08900C56DE9 = {
            CreatedOnToolsVersion = 6.3.1;
          };
        };
      };
      buildConfigurationList = 254BB8391B1FD08900C56DE9 /* Build configuration list for PBXProject "main" */;
      compatibilityVersion = "Xcode 3.2";
      developmentRegion = English;
      hasScannedForEncodings = 0;
      knownRegions = (
        en,
        Base,
      );
      mainGroup = 254BB8351B1FD08900C56DE9;
      productRefGroup = 254BB83F1B1FD08900C56DE9 /* Products */;
      projectDirPath = "";
      projectRoot = "";
      targets = (
        254BB83D1B1FD08900C56DE9 /* main */,
      );
    };
 /* End PBXProject section */

 /* Begin PBXResourcesBuildPhase section */
    254BB83C1B1FD08900C56DE9 /* Resources */ = {
      isa = PBXResourcesBuildPhase;
      buildActionMask = 2147483647;
      files = (
        254BB8681B1FD16500C56DE9 /* main in Resources */,
        254BB84F1B1FD08900C56DE9 /* Images.xcassets in Resources */,
      );
      runOnlyForDeploymentPostprocessing = 0;
    };
 /* End PBXResourcesBuildPhase section */

 /* Begin XCBuildConfiguration section */
    254BB85F1B1FD08900C56DE9 /* Debug */ = {
      isa = XCBuildConfiguration;
      buildSettings = {
        ALWAYS_SEARCH_USER_PATHS = NO;
        CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
        CLANG_CXX_LIBRARY = "libc++";
        CLANG_ENABLE_MODULES = YES;
        CLANG_ENABLE_OBJC_ARC = YES;
        CLANG_WARN_BOOL_CONVERSION = YES;
        CLANG_WARN_CONSTANT_CONVERSION = YES;
        CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
        CLANG_WARN_EMPTY_BODY = YES;
        CLANG_WARN_ENUM_CONVERSION = YES;
        CLANG_WARN_INT_CONVERSION = YES;
        CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
        CLANG_WARN_UNREACHABLE_CODE = YES;
        CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
        "CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
        COPY_PHASE_STRIP = NO;
        DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
        ENABLE_STRICT_OBJC_MSGSEND = YES;
        GCC_C_LANGUAGE_STANDARD = gnu99;
        GCC_DYNAMIC_NO_PIC = NO;
        GCC_NO_COMMON_BLOCKS = YES;
        GCC_OPTIMIZATION_LEVEL = 0;
        GCC_PREPROCESSOR_DEFINITIONS = (
          "DEBUG=1",
          "$(inherited)",
        );
        GCC_SYMBOLS_PRIVATE_EXTERN = NO;
        GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
        GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
        GCC_WARN_UNDECLARED_SELECTOR = YES;
        GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
        GCC_WARN_UNUSED_FUNCTION = YES;
        GCC_WARN_UNUSED_VARIABLE = YES;
        IPHONEOS_DEPLOYMENT_TARGET = 8.3;
        MTL_ENABLE_DEBUG_INFO = YES;
        ONLY_ACTIVE_ARCH = YES;
        SDKROOT = iphoneos;
        TARGETED_DEVICE_FAMILY = "1,2";
      };
      name = Debug;
    };
    254BB8601B1FD08900C56DE9 /* Release */ = {
      isa = XCBuildConfiguration;
      buildSettings = {
        ALWAYS_SEARCH_USER_PATHS = NO;
        CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
        CLANG_CXX_LIBRARY = "libc++";
        CLANG_ENABLE_MODULES = YES;
        CLANG_ENABLE_OBJC_ARC = YES;
        CLANG_WARN_BOOL_CONVERSION = YES;
        CLANG_WARN_CONSTANT_CONVERSION = YES;
        CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
        CLANG_WARN_EMPTY_BODY = YES;
        CLANG_WARN_ENUM_CONVERSION = YES;
        CLANG_WARN_INT_CONVERSION = YES;
        CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
        CLANG_WARN_UNREACHABLE_CODE = YES;
        CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
        "CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
        COPY_PHASE_STRIP = NO;
        DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
        ENABLE_NS_ASSERTIONS = NO;
        ENABLE_STRICT_OBJC_MSGSEND = YES;
        GCC_C_LANGUAGE_STANDARD = gnu99;
        GCC_NO_COMMON_BLOCKS = YES;
        GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
        GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
        GCC_WARN_UNDECLARED_SELECTOR = YES;
        GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
        GCC_WARN_UNUSED_FUNCTION = YES;
        GCC_WARN_UNUSED_VARIABLE = YES;
        IPHONEOS_DEPLOYMENT_TARGET = 8.3;
        MTL_ENABLE_DEBUG_INFO = NO;
        SDKROOT = iphoneos;
        TARGETED_DEVICE_FAMILY = "1,2";
        VALIDATE_PRODUCT = YES;
      };
      name = Release;
    };
    254BB8621B1FD08900C56DE9 /* Debug */ = {
      isa = XCBuildConfiguration;
      buildSettings = {
        ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
        INFOPLIST_FILE = main/Info.plist;
        LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
        PRODUCT_NAME = "$(TARGET_NAME)";
      };
      name = Debug;
    };
    254BB8631B1FD08900C56DE9 /* Release */ = {
      isa = XCBuildConfiguration;
      buildSettings = {
        ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
        INFOPLIST_FILE = main/Info.plist;
        LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
        PRODUCT_NAME = "$(TARGET_NAME)";
      };
      name = Release;
    };
 /* End XCBuildConfiguration section */

 /* Begin XCConfigurationList section */
    254BB8391B1FD08900C56DE9 /* Build configuration list for PBXProject "main" */ = {
      isa = XCConfigurationList;
      buildConfigurations = (
        254BB85F1B1FD08900C56DE9 /* Debug */,
        254BB8601B1FD08900C56DE9 /* Release */,
      );
      defaultConfigurationIsVisible = 0;
      defaultConfigurationName = Release;
    };
    254BB8611B1FD08900C56DE9 /* Build configuration list for PBXNativeTarget "main" */ = {
      isa = XCConfigurationList;
      buildConfigurations = (
        254BB8621B1FD08900C56DE9 /* Debug */,
        254BB8631B1FD08900C56DE9 /* Release */,
      );
      defaultConfigurationIsVisible = 0;
      defaultConfigurationName = Release;
    };
 /* End XCConfigurationList section */
  };
  rootObject = 254BB8361B1FD08900C56DE9 /* Project object */;
 }
 `)

 var constentsJSON = []byte(`{
  "images" : [
    {
      "idiom" : "iphone",
      "size" : "29x29",
      "scale" : "2x"
    },
    {
      "idiom" : "iphone",
      "size" : "29x29",
      "scale" : "3x"
    },
    {
      "idiom" : "iphone",
      "size" : "40x40",
      "scale" : "2x"
    },
    {
      "idiom" : "iphone",
      "size" : "40x40",
      "scale" : "3x"
    },
    {
      "idiom" : "iphone",
      "size" : "60x60",
      "scale" : "2x"
    },
    {
      "idiom" : "iphone",
      "size" : "60x60",
      "scale" : "3x"
    },
    {
      "idiom" : "ipad",
      "size" : "29x29",
      "scale" : "1x"
    },
    {
      "idiom" : "ipad",
      "size" : "29x29",
      "scale" : "2x"
    },
    {
      "idiom" : "ipad",
      "size" : "40x40",
      "scale" : "1x"
    },
    {
      "idiom" : "ipad",
      "size" : "40x40",
      "scale" : "2x"
    },
    {
      "idiom" : "ipad",
      "size" : "76x76",
      "scale" : "1x"
    },
    {
      "idiom" : "ipad",
      "size" : "76x76",
      "scale" : "2x"
    }
  ],
  "info" : {
    "version" : 1,
    "author" : "xcode"
  }
 }
 `)
	// Copyright 2015 Google Inc. All Rights Reserved.
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	// http://www.apache.org/licenses/LICENSE-2.0
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	// Package main contains a program that converts a Go package
	// into an XCode project that targets iOS.
	// Usage:
	//
	// go2xcode <pkg> [-o]
	//
	package main

	import (
	"flag"
	"io/ioutil"
	"log"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	)

	var o = flag.String("o", "", "directory to output the Xcode project; by default pwd")
	var verbose = flag.Bool("v", false, "trace build steps")

	func main() {
	flag.Parse()
	pkg := "."
	if args := flag.Args(); len(args) > 0 {
	pkg = args[0]
	}
	// main.xcodeproj/project.pbxproj
	// main (TODO: build the fat binary)
	// Info.plist
	// Images.xcassets/AppIcon.appiconset/Contents.json
	dir, err := ioutil.TempDir("", "go2xcode")
	if err != nil {
	log.Fatalln(err)
	}
	defer os.RemoveAll(dir)

	// TODO(jbd): Build and add binary.
	layout := map[string][]byte{
	filepath.Join(dir, "main.xcodeproj/project.pbxproj"): projPbxproj,
	filepath.Join(dir, "main/Info.plist"): infoPlist,
	filepath.Join(dir, "main/Images.xcassets/AppIcon.appiconset/Contents.json"): constentsJSON,
	}

	for dst, v := range layout {
	trace("make the workspace at %v", dst)
	if err := touchAndWrite(dst, v); err != nil {
	log.Fatalf("failed to touch and write to %v; err = %v", dst, err)
	}
	}

	// TODO(jbd): Build darwin/arm and darwin/arm64 cross compilers.

	trace("build arm binary in %v", dir)
	cmd := exec.Command("go", "build", "-o", filepath.Join(dir, "main-arm"), pkg)
	cmd.Env = []string{
	"GOOS=darwin",
	"GOARCH=arm",
	"CGO_ENABLED=1",
	"GOPATH=" + goEnv("GOPATH"),
	}
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
	log.Fatalln(err)
	}

	trace("build arm64 binary in %v", dir)
	cmd = exec.Command("go", "build", "-o", filepath.Join(dir, "main-arm64"), pkg)
	cmd.Env = []string{
	"GOOS=darwin",
	"GOARCH=arm64",
	"CGO_ENABLED=1",
	"GOPATH=" + goEnv("GOPATH"),
	}
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
	log.Fatalln(err)
	}

	trace("make fat binary in %v", dir)
	cmd = exec.Command(
	"lipo",
	"-create",
	filepath.Join(dir, "main-arm"),
	filepath.Join(dir, "main-arm64"),
	"-o", filepath.Join(dir, "main/main"),
	)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
	log.Fatalln(err)
	}

	trace("remove arm binary")
	if err := os.Remove(filepath.Join(dir, "main-arm")); err != nil {
	log.Fatalln(err)
	}

	trace("remove arm64 binary")
	if err := os.Remove(filepath.Join(dir, "main-arm64")); err != nil {
	log.Fatalln(err)
	}

	// TODO(jbd): Copy one by one if Rename fails due to temp dir
	// being on a different device.
	if *o == "" {
	*o = "."
	}

	dst := filepath.Join(*o, "xcode")
	trace("remove %d", dst)
	if err := os.RemoveAll(dst); err != nil {
	log.Fatalln(err)

	}

	trace("rename %v to %v", dir, dst)
	if err := os.Rename(dir, dst); err != nil {
	log.Fatalln(err)
	}
	}

	func trace(format string, v ...interface{}) {
	if *verbose {
	log.Printf(format, v...)
	}
	}

	func touchAndWrite(dst string, data []byte) error {
	if err := os.MkdirAll(filepath.Dir(dst), 0775\|os.ModeDir); err != nil {
	return err
	}
	return ioutil.WriteFile(dst, data, 0644)
	}

	func goEnv(name string) string {
	if val := os.Getenv(name); val != "" {
	return val
	}
	val, err := exec.Command("go", "env", name).Output()
	if err != nil {
	log.Fatalln(err)
	}
	return strings.TrimSpace(string(val))
	}

	var infoPlist = []byte(`<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<plist version="1.0">
	<dict>
	<key>CFBundleDevelopmentRegion</key>
	<string>en</string>
	<key>CFBundleExecutable</key>
	<string>main</string>
	<key>CFBundleIdentifier</key>
	<string>org.golang.todo.$(PRODUCT_NAME:rfc1034identifier)</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>$(PRODUCT_NAME)</string>
	<key>CFBundlePackageType</key>
	<string>APPL</string>
	<key>CFBundleShortVersionString</key>
	<string>1.0</string>
	<key>CFBundleSignature</key>
	<string>????</string>
	<key>CFBundleVersion</key>
	<string>1</string>
	<key>LSRequiresIPhoneOS</key>
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