How to install Swift package via package manager?

Question

I am currently following the document from swift.org to play around with the new Swift Package Manager.

I cloned the demo project from Github and run the following comma

Answer 1

I was facing the same issue and in my case, I recently updated my Xcode to 8.2.1 and swift 3.0 comes with it. I was getting this log.

Ranvijay-Mac-mini:PerfectTemplate ranaranvijaysingh$ swift build
error: unable to invoke subcommand: /Library/Developer/CommandLineTools/usr/bin/swift-build (No such file or directory)

The path it was taking was incorrect. It was suppose to be:

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

To change the path, run this command.

export PATH=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin:$PATH

And DONE.
Run : swift build again on your project and if you get this error.

xcrun: error: unable to lookup item 'PlatformPath' from command line tools installation
xcrun: error: unable to lookup item 'PlatformPath' in SDK '/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk'
error: Invalid platform path

then you need to change the SDK path as well.
In my case, I had two .sdk at path

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/ 

MacOSX.sdk  MacOSX10.12.sdk

To know what is your SDK path, run this command.

xcrun --sdk macosx --show-sdk-path

My case i got this.

/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk

To change it run this command.

sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer

and NOW DONE. Try running swift build now.