GIT Pre-push hook error

Question

I am trying to write a pre-push git hook to check the validity of a JIRA issue in perl . pre-push perl script executes fine and i get a desired output when the perl script is executed through the windows command prompt .
However , executing git command " git push origin master" to invoke the pre-push hook results in an error " illegal division by zero in warnings.pm" . Any clue on the behavioural difference when the script is executed via windows command prompt versus when invoked by GIT push command.

Comments

What line number is reported in the error message?what are the exact contents of your warnings.pm? (Is there more than one "warnings.pm" file on your system?)

Answer 1

Supposedly, when a hook script is executed by Git, it's being run using a port of a POSIX shell, bash, and not Windows shell (cmd.exe) -- hence I imagine there might be behavioral differences:
* Different environment.
* Git comes with its of minimal Perl installation, so if you have another one installed (like ActiveState Perl or Strawberry Perl etc), the latter might be picked when you perform your trial runs while the former is used by Git when running your hook.
* Push hooks run with the same credentials Git process serving the push operation is using; these might well be different from those you're logged in with while developing.

Where to go from there -- try to re-create as close an environment to that seen by your hook when it's being spawned by Git:
* Do your trial runs using Perl which comes with Git itself
* Do that in that "Git bash" window (accessible via the Git's Windows Start Menu entry) rather than in cmd.exe.
* Run Git bash with the same credentials used by your Git server process. If it runs with the LOCAL SYSTEM credentials, one trick to get the shell with appropriate credentials is to run psexec -s ... (available as part of the Sysinternals package).