GIT_TRACE doesn't show content filter files it's operating on

Hello,

I'm debugging the workings of a configured git content filter (nbstripout) and I'm trying to get GIT_TRACE to show me the files it's operating on, but it doesn't. Consider:

$ GIT_TRACE=1 git pull origin master [...] removed irrelevant sections of the output 16:49:28.846707 run-command.c:640 trace: run_command: git merge FETCH_HEAD 16:49:28.849309 git.c:344 trace: built-in: git merge FETCH_HEAD Updating 1ea49ad..ae0ba93 16:49:28.863291 run-command.c:640 trace: run_command: nbstripout 16:49:28.864700 run-command.c:640 trace: run_command: nbstripout 16:49:28.866060 run-command.c:640 trace: run_command: nbstripout [...] many more of the same

How can I get GIT_TRACE's run_command to show the arguments passed to the filter? I looked at various other debug environment variables in git's manual, but I don't see anything that would enable that level of debug.

I'm aware of git check-attr, but I'd like to see the run time trace on which files it's running the filter on and with which arguments.

git version 2.17.1

I originally posted this as a question here: <https://stackoverflow.com/questions/51995773/getting-git-to-show-specific-filenames-it-is-running-content-filters-on> and it appears that sq_quote_argv_pretty() doesn't get argv when a content filter is invoked, so it doesn't show this information.

Would it be possible to make the files and any other passed arguments show in the trace?

Thank you.