Debugging Git Errors Using Environment Variables
One of the frustrating things I've found with Git is that it can be difficult to work out why errors have occurred:
error: gpg failed to sign the data fatal: failed to write commit object
This is especially frustrating as some commands have a
--verbose flag, but do not tell us anything useful (which is made clear on the man pages, once you read about it).
I've found today that the official Git documentation has a section on "Environment Variables", and gives us information about various environment variables we can use to debug.
GIT_TRACE gives us information about what's happening under the hood:
$ GIT_TRACE=1 git commit -m "Add page that always requires a logged-in user" 20:52:58.902766 git.c:328 trace: built-in: git 'commit' '-vvv' '-m' 'Add page that always requires a logged-in user' 20:52:58.918467 run-command.c:626 trace: run_command: 'gpg' '--status-fd=2' '-bsau' '23810377252EF4C2' error: gpg failed to sign the data fatal: failed to write commit object