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

Use filter-branch's --setup parm and some shell power:

git filter-branch --setup '
for id in `git rev-list commitA..commitB`; do
         eval filterfor_$id=rewrite
done
rewrite() {
        GIT_AUTHOR_NAME="Frederick. O. Oosball"
        GIT_AUTHOR_EMAIL=foobar@example.org
}
' --env-filter 'eval \$filterfor_$GIT_COMMIT'