Cocopods error while updating to swift 3.0

[dahikarShashant]

Hi folks, I am getting the following error while installing the pod to latest.

Installing IDZSwiftCommonCrypto (0.9.0)
[!] /bin/bash -c
set -e
touch prepare_command.txt
echo 'Running prepare_command'
echo 'Creating modulemaps in' pwd
echo Running GenerateCommonCryptoModule

TC="--toolchain com.apple.dt.toolchain.Swift_2_3"

SWIFT="xcrun $TC swift"
$SWIFT ./GenerateCommonCryptoModule.swift macosx .
$SWIFT ./GenerateCommonCryptoModule.swift iphonesimulator .
$SWIFT ./GenerateCommonCryptoModule.swift iphoneos .
$SWIFT ./GenerateCommonCryptoModule.swift appletvsimulator .
$SWIFT ./GenerateCommonCryptoModule.swift appletvos .
$SWIFT ./GenerateCommonCryptoModule.swift watchsimulator .
$SWIFT ./GenerateCommonCryptoModule.swift watchos .

Running prepare_command
Creating modulemaps in /Users/shashantdahikar/Library/Caches/CocoaPods/Pods/Release/IDZSwiftCommonCrypto/0.9.0-60f14
Running GenerateCommonCryptoModule
./GenerateCommonCryptoModule.swift:33:24: error: expected member name following '.'
return FileManager.default.fileExists(atPath: filePath)
^
./GenerateCommonCryptoModule.swift:33:24: error: 'default' label can only appear inside a 'switch' statement
return FileManager.default.fileExists(atPath: filePath)
^
./GenerateCommonCryptoModule.swift:62:5: error: enum 'case' is not allowed outside of an enum
case iOS = "iphoneos",
^
./GenerateCommonCryptoModule.swift:69:12: error: static properties may only be declared on a type
static let all = [iOS, iOSSimulator, watchOS, watchSimulator, tvOS, tvOSSimulator, MacOSX]
~~~~~~~^

./GenerateCommonCryptoModule.swift:61:18: error: braced block of statements is an unused closure
enum SDK: String {
^
./GenerateCommonCryptoModule.swift:127:1: error: expected '}' at end of brace statement

^
./GenerateCommonCryptoModule.swift:32:43: note: to match this opening '{'
func fileExists(filePath: String) -> Bool {
^
./GenerateCommonCryptoModule.swift:17:22: error: use of unresolved identifier 'Pipe'
let outputPipe = Pipe()
^~~~
./GenerateCommonCryptoModule.swift:18:16: error: 'Process' cannot be constructed because it has no accessible initializers
let task = Process()
^
./GenerateCommonCryptoModule.swift:69:23: error: use of unresolved identifier 'iOS'
static let all = [iOS, iOSSimulator, watchOS, watchSimulator, tvOS, tvOSSimulator, MacOSX]
^~~
./GenerateCommonCryptoModule.swift:69:28: error: use of unresolved identifier 'iOSSimulator'
static let all = [iOS, iOSSimulator, watchOS, watchSimulator, tvOS, tvOSSimulator, MacOSX]
^~~~~~~~~~~~
./GenerateCommonCryptoModule.swift:69:42: error: use of unresolved identifier 'watchOS'
static let all = [iOS, iOSSimulator, watchOS, watchSimulator, tvOS, tvOSSimulator, MacOSX]
^~~~~~~
./GenerateCommonCryptoModule.swift:69:51: error: use of unresolved identifier 'watchSimulator'
static let all = [iOS, iOSSimulator, watchOS, watchSimulator, tvOS, tvOSSimulator, MacOSX]
^~~~~~~~~~~~~~
./GenerateCommonCryptoModule.swift:69:67: error: use of unresolved identifier 'tvOS'
static let all = [iOS, iOSSimulator, watchOS, watchSimulator, tvOS, tvOSSimulator, MacOSX]
^~~~
./GenerateCommonCryptoModule.swift:69:73: error: use of unresolved identifier 'tvOSSimulator'
static let all = [iOS, iOSSimulator, watchOS, watchSimulator, tvOS, tvOSSimulator, MacOSX]
^~~~~~~~~~~~~
./GenerateCommonCryptoModule.swift:69:88: error: use of unresolved identifier 'MacOSX'
static let all = [iOS, iOSSimulator, watchOS, watchSimulator, tvOS, tvOSSimulator, MacOSX]
^~~~~~
./GenerateCommonCryptoModule.swift:61:18: error: expression resolves to an unused function
enum SDK: String {
^
./GenerateCommonCryptoModule.swift:73:17: error: use of unresolved identifier 'SDK'
guard let sdk = SDK(rawValue: CommandLine.arguments[1])?.rawValue else { reportError(message: "SDK must be one of (SDK.all.map { $0.rawValue })") }
^~~
./GenerateCommonCryptoModule.swift:73:31: error: use of unresolved identifier 'CommandLine'
guard let sdk = SDK(rawValue: CommandLine.arguments[1])?.rawValue else { reportError(message: "SDK must be one of (SDK.all.map { $0.rawValue })") }
^~~~~~~~~~~
./GenerateCommonCryptoModule.swift:73:74: error: use of unresolved identifier 'reportError'
guard let sdk = SDK(rawValue: CommandLine.arguments[1])?.rawValue else { reportError(message: "SDK must be one of (SDK.all.map { $0.rawValue })") }
^~~~~~~~~~~
./GenerateCommonCryptoModule.swift:73:117: error: use of unresolved identifier 'SDK'
guard let sdk = SDK(rawValue: CommandLine.arguments[1])?.rawValue else { reportError(message: "SDK must be one of (SDK.all.map { $0.rawValue })") }
^~~
./GenerateCommonCryptoModule.swift:74:24: error: use of unresolved identifier 'trim'
guard let sdkVersion = trim(runShellCommand(command: "/usr/bin/xcrun --sdk (sdk) --show-sdk-version")) else {
^~~~
./GenerateCommonCryptoModule.swift:75:5: error: use of unresolved identifier 'reportError'
reportError(message: "ERROR: Failed to determine SDK version for (sdk)")
^~~~~~~~~~~
./GenerateCommonCryptoModule.swift:77:21: error: use of unresolved identifier 'trim'
guard let sdkPath = trim(runShellCommand(command: "/usr/bin/xcrun --sdk (sdk) --show-sdk-path")) else {
^~~~
./GenerateCommonCryptoModule.swift:78:5: error: use of unresolved identifier 'reportError'
reportError(message: "ERROR: Failed to determine SDK path for (sdk)")
^~~~~~~~~~~
./GenerateCommonCryptoModule.swift:89:4: error: use of unresolved identifier 'CommandLine'
if CommandLine.arguments.count > 2 {
^~~~~~~~~~~
./GenerateCommonCryptoModule.swift:90:27: error: use of unresolved identifier 'CommandLine'
moduleDirectory = "(CommandLine.arguments[2])/Frameworks/(sdk)/CommonCrypto.framework"
^~~~~~~~~~~
./GenerateCommonCryptoModule.swift:97:18: error: extraneous argument label 'filePath:' in call
if fileExists(filePath: moduleDirectory) {
^~~~~~~~~~~

./GenerateCommonCryptoModule.swift:98:9: error: use of unresolved identifier 'reportError'
reportError(message: "Module directory already exists at (moduleDirectory).")
^~~~~~~~~~~
./GenerateCommonCryptoModule.swift:102:10: error: missing argument for parameter #2 in call
if !mkdir(path: moduleDirectory) {
^
./GenerateCommonCryptoModule.swift:103:5: error: use of unresolved identifier 'reportError'
reportError(message: "Failed to create module directory (moduleDirectory)")
^~~~~~~~~~~
./GenerateCommonCryptoModule.swift:124:5: error: use of unresolved identifier 'reportError'
reportError(message: "Failed to write module map file to (moduleMapPath)")
^~~~~~~~~~~

** Xcode 8.0, cocoapods 1.1.0.rc.2, minumum deployment target 9.3.

[iosdevzone]

This is happening because the Xcode trying to run the GenerateCommonCryptoModule.swift as a Swift 2.3 script. The 0.9.0 release is for Swift 3.0. There are a few possible reasons for this:

1. You are not really using Xcode 8; check this by making sure xcode-select -p points to XCode 8.
2. Some setting in your project or environment is causing CocoaPods to default to Swift 2.3.
   If you are using Swift 2.3 please use once of the 0.8.x releases.
   I notice you are using a prerelease version of CocoaPods. I have successfully tested with the current stable release. This is another possibility.

Finally, if you cannot sort out the problem and your project is open source, point to your repo and I will see if I can figure out what is going wrong.

[dahikarShashant]

@iosdevzone thank you so much for the help. It was the xcode version, had to point to the correct xcode to get rid of the error.

[iosdevzone]

Glad you got it working!