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![Junio C Hamano](/assets/img/avatar_default.png)
My stupidity deserved to be yelled at by Linus ... there is no reason to require the working tree to be clean when merging -- the only requirements are index to match HEAD commit and the paths involved in merge are up to date in the working tree. Revert and cherry-pick are just specialized forms of merge, and the requirements should be the same. Remove the 'general purpose routine to make sure tree is clean' from git-sh-setup, to prevent me from getting tempted again. Signed-off-by: Junio C Hamano <junkio@cox.net>
170 lines
3.8 KiB
Bash
Executable file
170 lines
3.8 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2005 Linus Torvalds
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# Copyright (c) 2005 Junio C Hamano
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#
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. git-sh-setup || die "Not a git archive"
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case "$0" in
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*-revert* )
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me=revert ;;
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*-cherry-pick* )
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me=cherry-pick ;;
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* )
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die "What are ou talking about?" ;;
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esac
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usage () {
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case "$me" in
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cherry-pick)
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die "usage git $me [-n] [-r] <commit-ish>"
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;;
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revert)
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die "usage git $me [-n] <commit-ish>"
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;;
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esac
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}
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no_commit= replay=
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while case "$#" in 0) break ;; esac
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do
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case "$1" in
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-n|--n|--no|--no-|--no-c|--no-co|--no-com|--no-comm|\
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--no-commi|--no-commit)
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no_commit=t
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;;
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-r|--r|--re|--rep|--repl|--repla|--replay)
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replay=t
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;;
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-*)
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usage
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;;
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*)
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break
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;;
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esac
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shift
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done
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test "$me,$replay" = "revert,t" && usage
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case "$no_commit" in
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t)
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# We do not intend to commit immediately. We just want to
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# merge the differences in.
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head=$(git-write-tree) ||
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die "Your index file is unmerged."
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;;
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*)
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head=$(git-rev-parse --verify HEAD) ||
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die "You do not have a valid HEAD"
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files=$(git-diff-index --cached --name-only $head) || exit
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if [ "$files" ]; then
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die "Dirty index: cannot $me (dirty: $files)"
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fi
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;;
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esac
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rev=$(git-rev-parse --verify "$@") &&
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commit=$(git-rev-parse --verify "$rev^0") ||
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die "Not a single commit $@"
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prev=$(git-rev-parse --verify "$commit^1" 2>/dev/null) ||
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die "Cannot run $me a root commit"
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git-rev-parse --verify "$commit^2" >/dev/null 2>&1 &&
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die "Cannot run $me a multi-parent commit."
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# "commit" is an existing commit. We would want to apply
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# the difference it introduces since its first parent "prev"
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# on top of the current HEAD if we are cherry-pick. Or the
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# reverse of it if we are revert.
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case "$me" in
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revert)
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git-rev-list --pretty=oneline --max-count=1 $commit |
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sed -e '
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s/^[^ ]* /Revert "/
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s/$/"/'
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echo
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echo "This reverts $commit commit."
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test "$rev" = "$commit" ||
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echo "(original 'git revert' arguments: $@)"
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base=$commit next=$prev
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;;
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cherry-pick)
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pick_author_script='
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/^author /{
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h
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s/^author \([^<]*\) <[^>]*> .*$/\1/
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s/'\''/'\''\'\'\''/g
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s/.*/GIT_AUTHOR_NAME='\''&'\''/p
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g
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s/^author [^<]* <\([^>]*\)> .*$/\1/
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s/'\''/'\''\'\'\''/g
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s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
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g
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s/^author [^<]* <[^>]*> \(.*\)$/\1/
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s/'\''/'\''\'\'\''/g
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s/.*/GIT_AUTHOR_DATE='\''&'\''/p
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q
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}'
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set_author_env=`git-cat-file commit "$commit" |
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sed -ne "$pick_author_script"`
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eval "$set_author_env"
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export GIT_AUTHOR_NAME
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export GIT_AUTHOR_EMAIL
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export GIT_AUTHOR_DATE
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git-cat-file commit $commit | sed -e '1,/^$/d'
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case "$replay" in
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'')
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echo "(cherry picked from $commit commit)"
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test "$rev" = "$commit" ||
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echo "(original 'git cherry-pick' arguments: $@)"
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;;
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esac
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base=$prev next=$commit
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;;
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esac >.msg
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# This three way merge is an interesting one. We are at
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# $head, and would want to apply the change between $commit
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# and $prev on top of us (when reverting), or the change between
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# $prev and $commit on top of us (when cherry-picking or replaying).
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echo >&2 "First trying simple merge strategy to $me."
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git-read-tree -m -u $base $head $next &&
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result=$(git-write-tree 2>/dev/null) || {
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echo >&2 "Simple $me fails; trying Automatic $me."
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git-merge-index -o git-merge-one-file -a || {
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echo >&2 "Automatic $me failed. After fixing it up,"
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echo >&2 "you can use \"git commit -F .msg\""
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case "$me" in
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cherry-pick)
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echo >&2 "You may choose to use the following when making"
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echo >&2 "the commit:"
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echo >&2 "$set_author_env"
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esac
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exit 1
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}
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result=$(git-write-tree) || exit
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}
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echo >&2 "Finished one $me."
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# If we are cherry-pick, and if the merge did not result in
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# hand-editing, we will hit this commit and inherit the original
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# author date and name.
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# If we are revert, or if our cherry-pick results in a hand merge,
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# we had better say that the current user is responsible for that.
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case "$no_commit" in
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'')
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git-commit -n -F .msg
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rm -f .msg
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;;
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esac
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