git checkout revision of a file in git gui

Question

Is there a good way to checkout revisions of a specific file in git gui like an add tool or something?

Tried adding a new tool as:

git checkout $REVISION $FILENAME 

But it only allows branch revisions out, not a specific commit. Is there a particular var I coud use to do that?

Answer 1

You could try:

 $ git show $REVISION:$FILENAME

with a ':' syntax as described in git rev-parse.
That would be if you can specify for $FILENAME the full path relative to the top directory of your project (the directory including the .git directory).

This should be equivalent to:

 $ git checkout $REVISION -- $FILENAME