After upgrading to Catalina (and originally Mojave), I ran git pull and saw this terrible error.
Johnxcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrunFortunately, this is easy to fix. Read on.
xcode-select --installTo fix this, it seems that you'll need to explicitly agree to the license agreement.
If you end up with multiple versions of Xcode, you can select the version you want with:
xcode-select --switch /Applications/Xcode.appOr if you want to run command line tools without Xcode:
xcode-select --switch /Library/Developer/CommandLineToolsSee this article for more information.
If you've ever tried running a shell script, only to get a command not found error, it probably means your shell script isn't executable: sudo ./install.
