Andrew's git - gitweb.git/blob

   1#!/bin/sh
   2. git-sh-setup-script || die "Not a git archive"
   3
   4# We want a clean tree and clean index to be able to revert.
   5status=$(git status)
   6case "$status" in
   7'nothing to commit') ;;
   8*)
   9        echo "$status"
  10        die "Your working tree is dirty; cannot revert a previous patch." ;;
  11esac
  12
  13rev=$(git-rev-parse --verify "$@") &&
  14commit=$(git-rev-parse --verify "$rev^0") || exit
  15if git-diff-tree -R -M -p $commit | git-apply --index &&
  16   msg=$(git-rev-list --pretty=oneline --max-count=1 $commit)
  17then
  18        {
  19                echo "$msg" | sed -e '
  20                        s/^[^ ]* /Revert "/
  21                        s/$/"/'
  22                echo
  23                echo "This reverts $commit commit."
  24                test "$rev" = "$commit" ||
  25                echo "(original 'git revert' arguments: $@)"
  26        } | git commit -F -
  27else
  28        # Now why did it fail?
  29        parents=`git-cat-file commit "$commit" 2>/dev/null |
  30                sed -ne '/^$/q;/^parent /p' |
  31                wc -l`
  32        case $parents in
  33        0) die "Cannot revert the root commit nor non commit-ish." ;;
  34        1) die "The patch does not apply." ;;
  35        *) die "Cannot revert a merge commit." ;;
  36        esac
  37fi