Which commit has this blob?

Question

Given the hash of a blob, is there a way to get a list of commits that have this blob in their tree?

Answer 1

While the original question does not ask for it, I think it is useful to also check the staging area to see if a blob is referenced. I modified the original bash script to do this and found what was referencing a corrupt blob in my repository:

#!/bin/sh
obj_name="$1"
shift
git ls-files --stage \
| if grep -q "$obj_name"; then
    echo Found in staging area. Run git ls-files --stage to see.
fi

git log "$@" --pretty=format:'%T %h %s' \
| while read tree commit subject ; do
    if git ls-tree -r $tree | grep -q "$obj_name" ; then
        echo $commit "$subject"
    fi
done