Find oldest files in a git repo

find-old-files.sh

git ls-tree -r --name-only HEAD | while read filename; do
  echo "$(git log -1 --format="%at | %h | %an | %ad |" -- $filename) $filename"
done

If you want to handle cases where a file has been renamed but not otherwise modified since (and in those cases see the time stamp before the rename), add:

--follow --diff-filter=r

This looks for renames (--follow), then filters them out (lower-case r).

To not have to handle filenames at all in references one can use the object SHA.

Also sending the output to a file for easy sorting and search without having to run the same query many times.

git ls-tree -r HEAD | head | while read MODE TYPE SHA FILENAME; do
  echo $(git log -1 --all --find-object=${SHA} --format="%ad | %h | %an <%ae> |" --date=iso-strict) "${FILENAME}"
done | tee tmpfile.txt

Sort and search

# oldest last
sort -r tmpfile.txt

# find a specific file
grep gitignore tmpfile.txt