Running filter-branch over a range of commits

Question

git filter-branch --env-filter \'
export GIT_AUTHOR_EMAIL=\"foo@example.com\"
export GIT_AUTHOR_NAME=\"foo\"\' -- commita..commitb

Results in

Answer 1

git filter-branch does accept range notation, but the end of the range needs to be a reference, not the ID of a commit.

git checkout -b tofilter commitb
git filter-branch .... commita..tofilter

If given just commits, it would not know what ref to update with the filtered branch.