sob2from.sh

   1 #!/bin/bash
   2
   3 git filter-branch -f --tag-name-filter cat --commit-filter '
   4         MESSAGE="$(git show --format=%B "$GIT_COMMIT")"
   5         SOB_LINE="$(echo "$MESSAGE" | sed -ne "s|^ *Signed-off-by: *||p" | head -n1)"
   6         SOB_AUTHOR="$(echo "$SOB_LINE" | sed -e "s|^\(.*\) <.*>\$|\\1|")"
   7         SOB_EMAIL="$(echo "$SOB_LINE" | sed -e "s|^.* <\(.*\)>\$|\\1|")"
   8
   9         if [ -n "$SOB_AUTHOR" -a -n "$SOB_EMAIL" ] && \
  10            [ "$GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL>" != "$SOB_AUTHOR <$SOB_EMAIL>" ] && \
  11            ! echo "$MESSAGE" | grep -sqE "^ *Signed-off-by: *$GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL>"; then
  12                 printf "\nRewrite $GIT_COMMIT: $GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL> => $SOB_AUTHOR <$SOB_EMAIL>\n" >&2
  13                 export GIT_AUTHOR_NAME="$SOB_AUTHOR"
  14                 export GIT_AUTHOR_EMAIL="$SOB_EMAIL"
  15         fi
  16
  17         git commit-tree "$@"
  18
  19 ' -- "${1:-HEAD~1..HEAD}"
  20
  21 git for-each-ref --format="%(refname)" refs/original/ | xargs -r -n 1 git update-ref -d