Merge branch 'ew/rebase'

* ew/rebase:
  rebase --merge: fix for rebasing more than 7 commits.
  rebase: error out for NO_PYTHON if they use recursive merge
  Add renaming-rebase test.
  rebase: Allow merge strategies to be used when rebasing
This commit is contained in:
Junio C Hamano 2006-06-22 10:34:02 -07:00
commit c5c23745d8
3 changed files with 320 additions and 10 deletions

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@ -7,7 +7,7 @@ git-rebase - Rebase local commits to a new head
SYNOPSIS
--------
'git-rebase' [--onto <newbase>] <upstream> [<branch>]
'git-rebase' [--merge] [--onto <newbase>] <upstream> [<branch>]
'git-rebase' --continue | --skip | --abort
@ -106,6 +106,24 @@ OPTIONS
--abort::
Restore the original branch and abort the rebase operation.
--skip::
Restart the rebasing process by skipping the current patch.
This does not work with the --merge option.
--merge::
Use merging strategies to rebase. When the recursive (default) merge
strategy is used, this allows rebase to be aware of renames on the
upstream side.
-s <strategy>, \--strategy=<strategy>::
Use the given merge strategy; can be supplied more than
once to specify them in the order they should be tried.
If there is no `-s` option, a built-in list of strategies
is used instead (`git-merge-recursive` when merging a single
head, `git-merge-octopus` otherwise). This implies --merge.
include::merge-strategies.txt[]
NOTES
-----
When you rebase a branch, you are changing its history in a way that

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@ -34,7 +34,93 @@ When you have resolved this problem run \"git rebase --continue\".
If you would prefer to skip this patch, instead run \"git rebase --skip\".
To restore the original branch and stop rebasing run \"git rebase --abort\".
"
MRESOLVEMSG="
When you have resolved this problem run \"git rebase --continue\".
To restore the original branch and stop rebasing run \"git rebase --abort\".
"
unset newbase
strategy=recursive
do_merge=
dotest=$GIT_DIR/.dotest-merge
prec=4
continue_merge () {
test -n "$prev_head" || die "prev_head must be defined"
test -d "$dotest" || die "$dotest directory does not exist"
unmerged=$(git-ls-files -u)
if test -n "$unmerged"
then
echo "You still have unmerged paths in your index"
echo "did you forget update-index?"
die "$MRESOLVEMSG"
fi
if test -n "`git-diff-index HEAD`"
then
git-commit -C "`cat $dotest/current`"
else
echo "Previous merge succeeded automatically"
fi
prev_head=`git-rev-parse HEAD^0`
# save the resulting commit so we can read-tree on it later
echo "$prev_head" > "$dotest/cmt.$msgnum.result"
echo "$prev_head" > "$dotest/prev_head"
# onto the next patch:
msgnum=$(($msgnum + 1))
echo "$msgnum" >"$dotest/msgnum"
}
call_merge () {
cmt="$(cat $dotest/cmt.$1)"
echo "$cmt" > "$dotest/current"
git-merge-$strategy "$cmt^" -- HEAD "$cmt"
rv=$?
case "$rv" in
0)
git-commit -C "$cmt" || die "commit failed: $MRESOLVEMSG"
;;
1)
test -d "$GIT_DIR/rr-cache" && git-rerere
die "$MRESOLVEMSG"
;;
2)
echo "Strategy: $rv $strategy failed, try another" 1>&2
die "$MRESOLVEMSG"
;;
*)
die "Unknown exit code ($rv) from command:" \
"git-merge-$strategy $cmt^ -- HEAD $cmt"
;;
esac
}
finish_rb_merge () {
set -e
msgnum=1
echo "Finalizing rebased commits..."
git-reset --hard "`cat $dotest/onto`"
end="`cat $dotest/end`"
while test "$msgnum" -le "$end"
do
git-read-tree `cat "$dotest/cmt.$msgnum.result"`
git-checkout-index -q -f -u -a
git-commit -C "`cat $dotest/cmt.$msgnum`"
printf "Committed %0${prec}d" $msgnum
echo ' '`git-rev-list --pretty=oneline -1 HEAD | \
sed 's/^[a-f0-9]\+ //'`
msgnum=$(($msgnum + 1))
done
rm -r "$dotest"
echo "All done."
}
while case "$#" in 0) break ;; esac
do
case "$1" in
@ -46,17 +132,43 @@ do
exit 1
;;
esac
if test -d "$dotest"
then
prev_head="`cat $dotest/prev_head`"
end="`cat $dotest/end`"
msgnum="`cat $dotest/msgnum`"
onto="`cat $dotest/onto`"
continue_merge
while test "$msgnum" -le "$end"
do
call_merge "$msgnum"
continue_merge
done
finish_rb_merge
exit
fi
git am --resolved --3way --resolvemsg="$RESOLVEMSG"
exit
;;
--skip)
if test -d "$dotest"
then
die "--skip is not supported when using --merge"
fi
git am -3 --skip --resolvemsg="$RESOLVEMSG"
exit
;;
--abort)
[ -d .dotest ] || die "No rebase in progress?"
if test -d "$dotest"
then
rm -r "$dotest"
elif test -d .dotest
then
rm -r .dotest
else
die "No rebase in progress?"
fi
git reset --hard ORIG_HEAD
rm -r .dotest
exit
;;
--onto)
@ -64,6 +176,23 @@ do
newbase="$2"
shift
;;
-M|-m|--m|--me|--mer|--merg|--merge)
do_merge=t
;;
-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
--strateg=*|--strategy=*|\
-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
case "$#,$1" in
*,*=*)
strategy=`expr "$1" : '-[^=]*=\(.*\)'` ;;
1,*)
usage ;;
*)
strategy="$2"
shift ;;
esac
do_merge=t
;;
-*)
usage
;;
@ -75,16 +204,25 @@ do
done
# Make sure we do not have .dotest
if mkdir .dotest
if test -z "$do_merge"
then
rmdir .dotest
else
echo >&2 '
if mkdir .dotest
then
rmdir .dotest
else
echo >&2 '
It seems that I cannot create a .dotest directory, and I wonder if you
are in the middle of patch application or another rebase. If that is not
the case, please rm -fr .dotest and run me again. I am stopping in case
you still have something valuable there.'
exit 1
exit 1
fi
else
if test -d "$dotest"
then
die "previous dotest directory $dotest still exists." \
'try git-rebase < --continue | --abort >'
fi
fi
# The tree must be really really clean.
@ -152,6 +290,48 @@ then
exit 0
fi
git-format-patch -k --stdout --full-index "$upstream"..ORIG_HEAD |
git am --binary -3 -k --resolvemsg="$RESOLVEMSG"
if test -z "$do_merge"
then
git-format-patch -k --stdout --full-index "$upstream"..ORIG_HEAD |
git am --binary -3 -k --resolvemsg="$RESOLVEMSG"
exit $?
fi
if test "@@NO_PYTHON@@" && test "$strategy" = "recursive"
then
die 'The recursive merge strategy currently relies on Python,
which this installation of git was not configured with. Please consider
a different merge strategy (e.g. octopus, resolve, stupid, ours)
or install Python and git with Python support.'
fi
# start doing a rebase with git-merge
# this is rename-aware if the recursive (default) strategy is used
mkdir -p "$dotest"
echo "$onto" > "$dotest/onto"
prev_head=`git-rev-parse HEAD^0`
echo "$prev_head" > "$dotest/prev_head"
msgnum=0
for cmt in `git-rev-list --no-merges "$upstream"..ORIG_HEAD \
| perl -e 'print reverse <>'`
do
msgnum=$(($msgnum + 1))
echo "$cmt" > "$dotest/cmt.$msgnum"
done
echo 1 >"$dotest/msgnum"
echo $msgnum >"$dotest/end"
end=$msgnum
msgnum=1
while test "$msgnum" -le "$end"
do
call_merge "$msgnum"
continue_merge
done
finish_rb_merge

112
t/t3402-rebase-merge.sh Executable file
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@ -0,0 +1,112 @@
#!/bin/sh
#
# Copyright (c) 2006 Junio C Hamano
#
test_description='git rebase --merge test'
. ./test-lib.sh
if test "$no_python"; then
echo "Skipping: no python => no recursive merge"
test_done
exit 0
fi
T="A quick brown fox
jumps over the lazy dog."
for i in 1 2 3 4 5 6 7 8 9 10
do
echo "$i $T"
done >original
test_expect_success setup '
git add original &&
git commit -m"initial" &&
git branch side &&
echo "11 $T" >>original &&
git commit -a -m"master updates a bit." &&
echo "12 $T" >>original &&
git commit -a -m"master updates a bit more." &&
git checkout side &&
(echo "0 $T" ; cat original) >renamed &&
git add renamed &&
git update-index --force-remove original &&
git commit -a -m"side renames and edits." &&
tr "[a-z]" "[A-Z]" <original >newfile &&
git add newfile &&
git commit -a -m"side edits further." &&
tr "[a-m]" "[A-M]" <original >newfile &&
rm -f original &&
git commit -a -m"side edits once again." &&
git branch test-rebase side &&
git branch test-rebase-pick side &&
git branch test-reference-pick side &&
git checkout -b test-merge side
'
test_expect_success 'reference merge' '
git merge -s recursive "reference merge" HEAD master
'
test_expect_success rebase '
git checkout test-rebase &&
git rebase --merge master
'
test_expect_success 'merge and rebase should match' '
git diff-tree -r test-rebase test-merge >difference &&
if test -s difference
then
cat difference
(exit 1)
else
echo happy
fi
'
test_expect_success 'rebase the other way' '
git reset --hard master &&
git rebase --merge side
'
test_expect_success 'merge and rebase should match' '
git diff-tree -r test-rebase test-merge >difference &&
if test -s difference
then
cat difference
(exit 1)
else
echo happy
fi
'
test_expect_success 'picking rebase' '
git reset --hard side &&
git rebase --merge --onto master side^^ &&
mb=$(git merge-base master HEAD) &&
if test "$mb" = "$(git rev-parse master)"
then
echo happy
else
git show-branch
(exit 1)
fi &&
f=$(git diff-tree --name-only HEAD^ HEAD) &&
g=$(git diff-tree --name-only HEAD^^ HEAD^) &&
case "$f,$g" in
newfile,newfile)
echo happy ;;
*)
echo "$f"
echo "$g"
(exit 1)
esac
'
test_done