Andrew's git - gitweb.git/blob

   1#!/bin/sh
   2#
   3# Copyright (c) 2005 Junio C Hamano.
   4#
   5
   6USAGE='[--onto <newbase>] <upstream> [<branch>]'
   7LONG_USAGE='git-rebase replaces <branch> with a new branch of the
   8same name.  When the --onto option is provided the new branch starts
   9out with a HEAD equal to <newbase>, otherwise it is equal to <upstream>
  10It then attempts to create a new commit for each commit from the original
  11<branch> that does not exist in the <upstream> branch.
  12
  13It is possible that a merge failure will prevent this process from being
  14completely automatic.  You will have to resolve any such merge failure
  15and run git rebase --continue.  Another option is to bypass the commit
  16that caused the merge failure with git rebase --skip.  To restore the
  17original <branch> and remove the .dotest working files, use the command
  18git rebase --abort instead.
  19
  20Note that if <branch> is not specified on the command line, the
  21currently checked out branch is used.  You must be in the top
  22directory of your project to start (or continue) a rebase.
  23
  24Example:       git-rebase master~1 topic
  25
  26        A---B---C topic                   A'\''--B'\''--C'\'' topic
  27       /                   -->           /
  28  D---E---F---G master          D---E---F---G master
  29'
  30. git-sh-setup
  31
  32RESOLVEMSG="
  33When you have resolved this problem run \"git rebase --continue\".
  34If you would prefer to skip this patch, instead run \"git rebase --skip\".
  35To restore the original branch and stop rebasing run \"git rebase --abort\".
  36"
  37unset newbase
  38while case "$#" in 0) break ;; esac
  39do
  40        case "$1" in
  41        --continue)
  42                diff=$(git-diff-files)
  43                case "$diff" in
  44                ?*)     echo "You must edit all merge conflicts and then"
  45                        echo "mark them as resolved using git update-index"
  46                        exit 1
  47                        ;;
  48                esac
  49                git am --resolved --3way --resolvemsg="$RESOLVEMSG"
  50                exit
  51                ;;
  52        --skip)
  53                git am -3 --skip --resolvemsg="$RESOLVEMSG"
  54                exit
  55                ;;
  56        --abort)
  57                [ -d .dotest ] || die "No rebase in progress?"
  58                git reset --hard ORIG_HEAD
  59                rm -r .dotest
  60                exit
  61                ;;
  62        --onto)
  63                test 2 -le "$#" || usage
  64                newbase="$2"
  65                shift
  66                ;;
  67        -*)
  68                usage
  69                ;;
  70        *)
  71                break
  72                ;;
  73        esac
  74        shift
  75done
  76
  77# Make sure we do not have .dotest
  78if mkdir .dotest
  79then
  80        rmdir .dotest
  81else
  82        echo >&2 '
  83It seems that I cannot create a .dotest directory, and I wonder if you
  84are in the middle of patch application or another rebase.  If that is not
  85the case, please rm -fr .dotest and run me again.  I am stopping in case
  86you still have something valuable there.'
  87        exit 1
  88fi
  89
  90# The tree must be really really clean.
  91git-update-index --refresh || exit
  92diff=$(git-diff-index --cached --name-status -r HEAD)
  93case "$diff" in
  94?*)     echo "$diff"
  95        exit 1
  96        ;;
  97esac
  98
  99# The upstream head must be given.  Make sure it is valid.
 100upstream_name="$1"
 101upstream=`git rev-parse --verify "${upstream_name}^0"` ||
 102    die "invalid upstream $upstream_name"
 103
 104# If a hook exists, give it a chance to interrupt
 105if test -x "$GIT_DIR/hooks/pre-rebase"
 106then
 107        "$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || {
 108                echo >&2 "The pre-rebase hook refused to rebase."
 109                exit 1
 110        }
 111fi
 112
 113# If the branch to rebase is given, first switch to it.
 114case "$#" in
 1152)
 116        branch_name="$2"
 117        git-checkout "$2" || usage
 118        ;;
 119*)
 120        branch_name=`git symbolic-ref HEAD` || die "No current branch"
 121        branch_name=`expr "z$branch_name" : 'zrefs/heads/\(.*\)'`
 122        ;;
 123esac
 124branch=$(git-rev-parse --verify "${branch_name}^0") || exit
 125
 126# Make sure the branch to rebase onto is valid.
 127onto_name=${newbase-"$upstream_name"}
 128onto=$(git-rev-parse --verify "${onto_name}^0") || exit
 129
 130# Now we are rebasing commits $upstream..$branch on top of $onto
 131
 132# Check if we are already based on $onto, but this should be
 133# done only when upstream and onto are the same.
 134if test "$upstream" = "$onto"
 135then
 136        mb=$(git-merge-base "$onto" "$branch")
 137        if test "$mb" = "$onto"
 138        then
 139                echo >&2 "Current branch $branch_name is up to date."
 140                exit 0
 141        fi
 142fi
 143
 144# Rewind the head to "$onto"; this saves our current head in ORIG_HEAD.
 145git-reset --hard "$onto"
 146
 147# If the $onto is a proper descendant of the tip of the branch, then
 148# we just fast forwarded.
 149if test "$mb" = "$onto"
 150then
 151        echo >&2 "Fast-forwarded $branch to $newbase."
 152        exit 0
 153fi
 154
 155git-format-patch -k --stdout --full-index "$upstream" ORIG_HEAD |
 156git am --binary -3 -k --resolvemsg="$RESOLVEMSG"
 157