Module git_io 

Thin wrappers around the git binary for the TUI overlay.

All git calls in the overlay funnel through run_git so:

• the binary path lives in exactly one place,
• stderr is folded into anyhow::Error with the failing argv,
• empty-repos / non-repo paths surface as errors the slash command can reply with instead of panicking.

Every helper here shells out to git. No in-process git library is pulled in — keeps the TUI overlay’s dependency surface bounded.

Functions

diff_head

git diff HEAD --no-ext-diff with a fallback for fresh repos.

run_git

Run git <args…> in cwd and return stdout as a String.

status_porcelain_z

git status --porcelain -z parsed into StatusEntrys.