ref: 0022137d89f12741ac3e6cf4173aa876cda5a726 tm/tm-init -rwxr-xr-x 459 bytes
Fix shellcheck warnings

And disable them when necessary. This is all dumb and terrible and I
hate this world and I really really should've used a real programming
language instead of shell why did I do this to myself.
init: use commit instead of commit-tree
init: add .tmignore in initial commit
init: set $TM_DIR before sourcing lib.sh
init: minor fixups
init: handle init in existing repo

Also create an initial HEAD commit.
Implement .tmignore
Make index a normal ref
Fix handling of ambiguous ref prefixes
insert: handle trees
Rewrite in POSIX sh

Also don't compress objects and make a few other small changes to the