Andrew's git - gitweb.git/blob

   1#!/bin/sh
   2#
   3# Copyright (c) 2005 Linus Torvalds
   4# Copyright (c) 2005 Junio C Hamano
   5#
   6. git-sh-setup || die "Not a git archive"
   7
   8case "$0" in
   9*-revert* )
  10        me=revert ;;
  11*-cherry-pick* )
  12        me=cherry-pick ;;
  13* )
  14        die "What are ou talking about?" ;;
  15esac
  16
  17usage () {
  18        case "$me" in
  19        cherry-pick)
  20                die "usage git $me [-n] [-r] <commit-ish>"
  21                ;;
  22        revert)
  23                die "usage git $me [-n] <commit-ish>"
  24                ;;
  25        esac
  26}
  27
  28no_commit= replay=
  29while case "$#" in 0) break ;; esac
  30do
  31        case "$1" in
  32        -n|--n|--no|--no-|--no-c|--no-co|--no-com|--no-comm|\
  33            --no-commi|--no-commit)
  34                no_commit=t
  35                ;;
  36        -r|--r|--re|--rep|--repl|--repla|--replay)
  37                replay=t
  38                ;;
  39        -*)
  40                usage
  41                ;;
  42        *)
  43                break
  44                ;;
  45        esac
  46        shift
  47done
  48
  49test "$me,$replay" = "revert,t" && usage
  50
  51case "$no_commit" in
  52t)
  53        # We do not intend to commit immediately.  We just want to
  54        # merge the differences in.
  55        head=$(git-write-tree) ||
  56                die "Your index file is unmerged."
  57        ;;
  58*)
  59        head=$(git-rev-parse --verify HEAD) ||
  60                die "You do not have a valid HEAD"
  61        files=$(git-diff-index --cached --name-only $head) || exit
  62        if [ "$files" ]; then
  63                die "Dirty index: cannot $me (dirty: $files)"
  64        fi
  65        ;;
  66esac
  67
  68rev=$(git-rev-parse --verify "$@") &&
  69commit=$(git-rev-parse --verify "$rev^0") ||
  70        die "Not a single commit $@"
  71prev=$(git-rev-parse --verify "$commit^1" 2>/dev/null) ||
  72        die "Cannot run $me a root commit"
  73git-rev-parse --verify "$commit^2" >/dev/null 2>&1 &&
  74        die "Cannot run $me a multi-parent commit."
  75
  76# "commit" is an existing commit.  We would want to apply
  77# the difference it introduces since its first parent "prev"
  78# on top of the current HEAD if we are cherry-pick.  Or the
  79# reverse of it if we are revert.
  80
  81case "$me" in
  82revert)
  83        git-rev-list --pretty=oneline --max-count=1 $commit |
  84        sed -e '
  85                s/^[^ ]* /Revert "/
  86                s/$/"/'
  87        echo
  88        echo "This reverts $commit commit."
  89        test "$rev" = "$commit" ||
  90        echo "(original 'git revert' arguments: $@)"
  91        base=$commit next=$prev
  92        ;;
  93
  94cherry-pick)
  95        pick_author_script='
  96        /^author /{
  97                h
  98                s/^author \([^<]*\) <[^>]*> .*$/\1/
  99                s/'\''/'\''\'\'\''/g
 100                s/.*/GIT_AUTHOR_NAME='\''&'\''/p
 101
 102                g
 103                s/^author [^<]* <\([^>]*\)> .*$/\1/
 104                s/'\''/'\''\'\'\''/g
 105                s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
 106
 107                g
 108                s/^author [^<]* <[^>]*> \(.*\)$/\1/
 109                s/'\''/'\''\'\'\''/g
 110                s/.*/GIT_AUTHOR_DATE='\''&'\''/p
 111
 112                q
 113        }'
 114        set_author_env=`git-cat-file commit "$commit" |
 115        LANG=C LC_ALL=C sed -ne "$pick_author_script"`
 116        eval "$set_author_env"
 117        export GIT_AUTHOR_NAME
 118        export GIT_AUTHOR_EMAIL
 119        export GIT_AUTHOR_DATE
 120
 121        git-cat-file commit $commit | sed -e '1,/^$/d'
 122        case "$replay" in
 123        '')
 124                echo "(cherry picked from $commit commit)"
 125                test "$rev" = "$commit" ||
 126                echo "(original 'git cherry-pick' arguments: $@)"
 127                ;;
 128        esac
 129        base=$prev next=$commit
 130        ;;
 131
 132esac >.msg
 133
 134# This three way merge is an interesting one.  We are at
 135# $head, and would want to apply the change between $commit
 136# and $prev on top of us (when reverting), or the change between
 137# $prev and $commit on top of us (when cherry-picking or replaying).
 138
 139echo >&2 "First trying simple merge strategy to $me."
 140git-read-tree -m -u $base $head $next &&
 141result=$(git-write-tree 2>/dev/null) || {
 142    echo >&2 "Simple $me fails; trying Automatic $me."
 143    git-merge-index -o git-merge-one-file -a || {
 144            echo >&2 "Automatic $me failed.  After fixing it up,"
 145            echo >&2 "you can use \"git commit -F .msg\""
 146            case "$me" in
 147            cherry-pick)
 148                echo >&2 "You may choose to use the following when making"
 149                echo >&2 "the commit:"
 150                echo >&2 "$set_author_env"
 151            esac
 152            exit 1
 153    }
 154    result=$(git-write-tree) || exit
 155}
 156echo >&2 "Finished one $me."
 157
 158# If we are cherry-pick, and if the merge did not result in
 159# hand-editing, we will hit this commit and inherit the original
 160# author date and name.
 161# If we are revert, or if our cherry-pick results in a hand merge,
 162# we had better say that the current user is responsible for that.
 163
 164case "$no_commit" in
 165'')
 166        git-commit -n -F .msg
 167        rm -f .msg
 168        ;;
 169esac