Avoid wasting memory while keeping track of what we have during fetch.
[alt-git.git] / git-rebase.sh
blob49c8f12e51153f5c7ecbdc5a1778c24ba28f428f
1 #!/bin/sh
3 # Copyright (c) 2005 Junio C Hamano.
6 . git-sh-setup || die "Not a git archive."
8 usage="usage: $0 "'<upstream> [<head>]
10 Uses output from git-cherry to rebase local commits to the new head of
11 upstream tree.'
13 case "$#,$1" in
14 1,*..*)
15 upstream=$(expr "$1" : '\(.*\)\.\.') ours=$(expr "$1" : '.*\.\.\(.*\)$')
16 set x "$upstream" "$ours"
17 shift ;;
18 esac
20 git-update-index --refresh || exit
22 case "$#" in
23 1) ours_symbolic=HEAD ;;
24 2) ours_symbolic="$2" ;;
25 *) die "$usage" ;;
26 esac
28 upstream=`git-rev-parse --verify "$1"` &&
29 ours=`git-rev-parse --verify "$ours_symbolic"` || exit
30 different1=$(git-diff-index --name-only --cached "$ours") &&
31 different2=$(git-diff-index --name-only "$ours") &&
32 test "$different1$different2" = "" ||
33 die "Your working tree does not match $ours_symbolic."
35 git-read-tree -m -u $ours $upstream &&
36 git-rev-parse --verify "$upstream^0" >"$GIT_DIR/HEAD" || exit
38 tmp=.rebase-tmp$$
39 fail=$tmp-fail
40 trap "rm -rf $tmp-*" 1 2 3 15
42 >$fail
44 git-cherry -v $upstream $ours |
45 while read sign commit msg
47 case "$sign" in
49 echo >&2 "* Already applied: $msg"
50 continue ;;
51 esac
52 echo >&2 "* Applying: $msg"
53 S=`cat "$GIT_DIR/HEAD"` &&
54 git-cherry-pick --replay $commit || {
55 echo >&2 "* Not applying the patch and continuing."
56 echo $commit >>$fail
57 git-reset --hard $S
59 done
60 if test -s $fail
61 then
62 echo >&2 Some commits could not be rebased, check by hand:
63 cat >&2 $fail
64 echo >&2 "(the same list of commits are found in $tmp)"
65 exit 1
66 else
67 rm -f $fail