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authorJunio C Hamano <gitster@pobox.com>2007-12-27 01:38:00 (GMT)
committerJunio C Hamano <gitster@pobox.com>2007-12-27 01:38:00 (GMT)
commite25cfae6677423d05a81c0862f58d3319141794c (patch)
treec2dc74cafe69f3da9f9d1b2bfb8c2927ee43bfea /contrib/examples
parent97d0c52980f0e64f0feed5b31390a32561df0ecf (diff)
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contrib: resurrect scripted git-revert.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'contrib/examples')
-rwxr-xr-xcontrib/examples/git-revert.sh197
1 files changed, 197 insertions, 0 deletions
diff --git a/contrib/examples/git-revert.sh b/contrib/examples/git-revert.sh
new file mode 100755
index 0000000..49f0032
--- /dev/null
+++ b/contrib/examples/git-revert.sh
@@ -0,0 +1,197 @@
+#!/bin/sh
+#
+# Copyright (c) 2005 Linus Torvalds
+# Copyright (c) 2005 Junio C Hamano
+#
+
+case "$0" in
+*-revert* )
+ test -t 0 && edit=-e
+ replay=
+ me=revert
+ USAGE='[--edit | --no-edit] [-n] <commit-ish>' ;;
+*-cherry-pick* )
+ replay=t
+ edit=
+ me=cherry-pick
+ USAGE='[--edit] [-n] [-r] [-x] <commit-ish>' ;;
+* )
+ echo >&2 "What are you talking about?"
+ exit 1 ;;
+esac
+
+SUBDIRECTORY_OK=Yes ;# we will cd up
+. git-sh-setup
+require_work_tree
+cd_to_toplevel
+
+no_commit=
+while case "$#" in 0) break ;; esac
+do
+ case "$1" in
+ -n|--n|--no|--no-|--no-c|--no-co|--no-com|--no-comm|\
+ --no-commi|--no-commit)
+ no_commit=t
+ ;;
+ -e|--e|--ed|--edi|--edit)
+ edit=-e
+ ;;
+ --n|--no|--no-|--no-e|--no-ed|--no-edi|--no-edit)
+ edit=
+ ;;
+ -r)
+ : no-op ;;
+ -x|--i-really-want-to-expose-my-private-commit-object-name)
+ replay=
+ ;;
+ -*)
+ usage
+ ;;
+ *)
+ break
+ ;;
+ esac
+ shift
+done
+
+set_reflog_action "$me"
+
+test "$me,$replay" = "revert,t" && usage
+
+case "$no_commit" in
+t)
+ # We do not intend to commit immediately. We just want to
+ # merge the differences in.
+ head=$(git-write-tree) ||
+ die "Your index file is unmerged."
+ ;;
+*)
+ head=$(git-rev-parse --verify HEAD) ||
+ die "You do not have a valid HEAD"
+ files=$(git-diff-index --cached --name-only $head) || exit
+ if [ "$files" ]; then
+ die "Dirty index: cannot $me (dirty: $files)"
+ fi
+ ;;
+esac
+
+rev=$(git-rev-parse --verify "$@") &&
+commit=$(git-rev-parse --verify "$rev^0") ||
+ die "Not a single commit $@"
+prev=$(git-rev-parse --verify "$commit^1" 2>/dev/null) ||
+ die "Cannot run $me a root commit"
+git-rev-parse --verify "$commit^2" >/dev/null 2>&1 &&
+ die "Cannot run $me a multi-parent commit."
+
+encoding=$(git config i18n.commitencoding || echo UTF-8)
+
+# "commit" is an existing commit. We would want to apply
+# the difference it introduces since its first parent "prev"
+# on top of the current HEAD if we are cherry-pick. Or the
+# reverse of it if we are revert.
+
+case "$me" in
+revert)
+ git show -s --pretty=oneline --encoding="$encoding" $commit |
+ sed -e '
+ s/^[^ ]* /Revert "/
+ s/$/"/
+ '
+ echo
+ echo "This reverts commit $commit."
+ test "$rev" = "$commit" ||
+ echo "(original 'git revert' arguments: $@)"
+ base=$commit next=$prev
+ ;;
+
+cherry-pick)
+ pick_author_script='
+ /^author /{
+ s/'\''/'\''\\'\'\''/g
+ h
+ s/^author \([^<]*\) <[^>]*> .*$/\1/
+ s/'\''/'\''\'\'\''/g
+ s/.*/GIT_AUTHOR_NAME='\''&'\''/p
+
+ g
+ s/^author [^<]* <\([^>]*\)> .*$/\1/
+ s/'\''/'\''\'\'\''/g
+ s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
+
+ g
+ s/^author [^<]* <[^>]*> \(.*\)$/\1/
+ s/'\''/'\''\'\'\''/g
+ s/.*/GIT_AUTHOR_DATE='\''&'\''/p
+
+ q
+ }'
+
+ logmsg=`git show -s --pretty=raw --encoding="$encoding" "$commit"`
+ set_author_env=`echo "$logmsg" |
+ LANG=C LC_ALL=C sed -ne "$pick_author_script"`
+ eval "$set_author_env"
+ export GIT_AUTHOR_NAME
+ export GIT_AUTHOR_EMAIL
+ export GIT_AUTHOR_DATE
+
+ echo "$logmsg" |
+ sed -e '1,/^$/d' -e 's/^ //'
+ case "$replay" in
+ '')
+ echo "(cherry picked from commit $commit)"
+ test "$rev" = "$commit" ||
+ echo "(original 'git cherry-pick' arguments: $@)"
+ ;;
+ esac
+ base=$prev next=$commit
+ ;;
+
+esac >.msg
+
+eval GITHEAD_$head=HEAD
+eval GITHEAD_$next='`git show -s \
+ --pretty=oneline --encoding="$encoding" "$commit" |
+ sed -e "s/^[^ ]* //"`'
+export GITHEAD_$head GITHEAD_$next
+
+# This three way merge is an interesting one. We are at
+# $head, and would want to apply the change between $commit
+# and $prev on top of us (when reverting), or the change between
+# $prev and $commit on top of us (when cherry-picking or replaying).
+
+git-merge-recursive $base -- $head $next &&
+result=$(git-write-tree 2>/dev/null) || {
+ mv -f .msg "$GIT_DIR/MERGE_MSG"
+ {
+ echo '
+Conflicts:
+'
+ git ls-files --unmerged |
+ sed -e 's/^[^ ]* / /' |
+ uniq
+ } >>"$GIT_DIR/MERGE_MSG"
+ echo >&2 "Automatic $me failed. After resolving the conflicts,"
+ echo >&2 "mark the corrected paths with 'git-add <paths>'"
+ echo >&2 "and commit the result."
+ case "$me" in
+ cherry-pick)
+ echo >&2 "You may choose to use the following when making"
+ echo >&2 "the commit:"
+ echo >&2 "$set_author_env"
+ esac
+ exit 1
+}
+echo >&2 "Finished one $me."
+
+# If we are cherry-pick, and if the merge did not result in
+# hand-editing, we will hit this commit and inherit the original
+# author date and name.
+# If we are revert, or if our cherry-pick results in a hand merge,
+# we had better say that the current user is responsible for that.
+
+case "$no_commit" in
+'')
+ git-commit -n -F .msg $edit
+ rm -f .msg
+ ;;
+esac