#
USAGE='[--onto <newbase>] <upstream> [<branch>]'
-LONG_USAGE='git-rebase applies to <upstream> (or optionally to <newbase>) commits
-from <branch> that do not appear in <upstream>. When <branch> is not
-specified it defaults to the current branch (HEAD).
+LONG_USAGE='git-rebase replaces <branch> with a new branch of the
+same name. When the --onto option is provided the new branch starts
+out with a HEAD equal to <newbase>, otherwise it is equal to <upstream>
+It then attempts to create a new commit for each commit from the original
+<branch> that does not exist in the <upstream> branch.
-When git-rebase is complete, <branch> will be updated to point to the
-newly created line of commit objects, so the previous line will not be
-accessible unless there are other references to it already.
+It is possible that a merge failure will prevent this process from being
+completely automatic. You will have to resolve any such merge failure
+and run git rebase --continue. Another option is to bypass the commit
+that caused the merge failure with git rebase --skip. To restore the
+original <branch> and remove the .dotest working files, use the command
+git rebase --abort instead.
-Assuming the following history:
+Note that if <branch> is not specified on the command line, the
+currently checked out branch is used. You must be in the top
+directory of your project to start (or continue) a rebase.
- A---B---C topic
- /
- D---E---F---G master
+Example: git-rebase master~1 topic
-The result of the following command:
+ A---B---C topic A'\''--B'\''--C'\'' topic
+ / --> /
+ D---E---F---G master D---E---F---G master
+'
+. git-sh-setup
- git-rebase --onto master~1 master topic
+RESOLVEMSG="
+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\".
+"
+unset newbase
+strategy=recursive
+do_merge=
+dotest=$GIT_DIR/.dotest-merge
+prec=4
- would be:
+continue_merge () {
+ test -n "$prev_head" || die "prev_head must be defined"
+ test -d "$dotest" || die "$dotest directory does not exist"
- A'\''--B'\''--C'\'' topic
- /
- D---E---F---G master
-'
+ 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 "$RESOLVEMSG"
+ fi
-. git-sh-setup
+ if test -n "`git-diff-index HEAD`"
+ then
+ if ! git-commit -C "`cat $dotest/current`"
+ then
+ echo "Commit failed, please do not call \"git commit\""
+ echo "directly, but instead do one of the following: "
+ die "$RESOLVEMSG"
+ fi
+ printf "Committed: %0${prec}d" $msgnum
+ else
+ printf "Already applied: %0${prec}d" $msgnum
+ fi
+ echo ' '`git-rev-list --pretty=oneline -1 HEAD | \
+ sed 's/^[a-f0-9]\+ //'`
+
+ prev_head=`git-rev-parse HEAD^0`
+ # save the resulting commit so we can read-tree on it later
+ echo "$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)
+ return
+ ;;
+ 1)
+ test -d "$GIT_DIR/rr-cache" && git-rerere
+ die "$RESOLVEMSG"
+ ;;
+ 2)
+ echo "Strategy: $rv $strategy failed, try another" 1>&2
+ die "$RESOLVEMSG"
+ ;;
+ *)
+ die "Unknown exit code ($rv) from command:" \
+ "git-merge-$strategy $cmt^ -- HEAD $cmt"
+ ;;
+ esac
+}
+
+finish_rb_merge () {
+ rm -r "$dotest"
+ echo "All done."
+}
-unset newbase
while case "$#" in 0) break ;; esac
do
case "$1" in
+ --continue)
+ diff=$(git-diff-files)
+ case "$diff" in
+ ?*) echo "You must edit all merge conflicts and then"
+ echo "mark them as resolved using git update-index"
+ exit 1
+ ;;
+ esac
+ if test -d "$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
+ prev_head="`cat $dotest/prev_head`"
+ end="`cat $dotest/end`"
+ msgnum="`cat $dotest/msgnum`"
+ msgnum=$(($msgnum + 1))
+ onto="`cat $dotest/onto`"
+ while test "$msgnum" -le "$end"
+ do
+ call_merge "$msgnum"
+ continue_merge
+ done
+ finish_rb_merge
+ exit
+ fi
+ git am -3 --skip --resolvemsg="$RESOLVEMSG"
+ exit
+ ;;
+ --abort)
+ if test -d "$dotest"
+ then
+ rm -r "$dotest"
+ elif test -d .dotest
+ then
+ rm -r .dotest
+ else
+ die "No rebase in progress?"
+ fi
+ git reset --hard ORIG_HEAD
+ exit
+ ;;
--onto)
test 2 -le "$#" || usage
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 "z$1" : 'z-[^=]*=\(.*\)'` ;;
+ 1,*)
+ usage ;;
+ *)
+ strategy="$2"
+ shift ;;
+ esac
+ do_merge=t
+ ;;
-*)
usage
;;
done
# Make sure we do not have .dotest
-if mkdir .dotest
+if test -z "$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 $dotest still exists." \
+ 'try git-rebase < --continue | --abort >'
+ fi
fi
# The tree must be really really clean.
exit 0
fi
-git-format-patch -k --stdout --full-index "$upstream" ORIG_HEAD |
-git am --binary -3 -k
+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