% git-find-blob (faster)
% Michael Stone
% March 17, 2012

Presently, Google's index seems to know [three][] [different][] [answers][]
to the question: "how do I find the (git) commit that introduced blob X?";
however, all three answers solve the problem with O(N) processes, which is
slow. A better solution, using only O(1) processes (and O(1) memory?) looks
like this:

    HASH=$(git hash-object -t blob /path/to/blob/to/find.c)
    git log --pretty=oneline --diff-filter=A --raw --abbrev=40 \
      | grep -e '^[^:]' -e $HASH \
      | grep -B 1 '^:'

Can you do better?

[three]: http://stackoverflow.com/questions/460331/git-finding-a-filename-from-a-sha1
[different]: https://github.com/jwiegley/git-scripts/blob/master/git-find-blob
[answers]: http://ebnj.net/gittips/