Code Signing: Missing DEVELOPER_DIR path

Question

I'm using the codesign command line utility to sign an Atom Electron .app folder. The command I use is:

codesign --verbose --deep --force --sign "Mac Developer: <MY NAME AND IDENTIFIER HERE>" AdminTool.app/Contents/Frameworks/Squirrel.framework

I read that with Yosemite, the codesign utility requires that you manually sign each framework before you can sign the entire .app folder, so that's what I'm trying to do by signing just Squirrel.framework for now.

I get this error:

xcrun: error: missing DEVELOPER_DIR path: /Library/Developer/CommandLineTools/usr/bin/xcrun/

AdminTool.app/Contents/Frameworks/Squirrel.framework: the codesign_allocate helper tool cannot be found or used

I looked at a previous StackOverflow thread regarding the codesign_allocate helper tool cannot be found issue and I followed what it said by reassigning the DEVELOPER_DIR environment variable to the path in the xcrun error. I'm not sure if I messed something up and now cannot sign my app as a result.

Any help and/or pointers would be greatly appreciated!

Answer 1

Ended up fixing this by installing the xcode command line tools with xcode-select --install and then running:

xcode-select -s /Applications/Xcode.app/Contents/Developers

I assume this correctly reset my DEVELOPER_DIR path so that codesign could find it when I ran it again.