From : http://blog.sourcetreeapp.com/2012/02/08/custom-actions-more-power-to-you/#comment-613408965

I want to do this:

git diff --name-only SHA1 SHA2

So that when I select two commits, I want to see a list of files that have changed between them. And it seems this sort of works since it contains both SHAs:

git diff --name-only $SHA

But Source Tree seems to output this: (because of the space character?)

git diff --name-only "1d150e8485003d1e32703a45b3698ef09a32fae4 9f033ee4f42138dcaff9feaa183e8702b5424e64" So git complains:

fatal: ambiguous argument '1d150e8485003d1e32703a45b3698ef09a32fae4 9f033ee4f42138dcaff9feaa183e8702b5424e64': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions

It appears that this is unintentional quoting done by NSTask that we need to avoid, probably by passing them as separate arguments rather than as a space-concatenated string.