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git/git-rebase--am.sh
Andrew Wong e481af06be rebase: Handle cases where format-patch fails
'format-patch' could fail due to reasons such as out of memory. Such
failures are not detected or handled, which causes rebase to incorrectly
think that it completed successfully and continue with cleanup. i.e.
calling move_to_original_branch

Instead of using a pipe, we separate 'format-patch' and 'am' by using an
intermediate file. This gurantees that we can invoke 'am' with the
complete input, or not invoking 'am' at all if 'format-patch' failed.

Also remove the use of '&&' at the end of the if-block, and rearrange
the 'write_basic_state' and 'move_to_original_branch' to make the logic
flow a bit better and easier to read.

Signed-off-by: Andrew Wong <andrew.kw.w@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-11 11:54:49 -07:00

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#!/bin/sh
#
# Copyright (c) 2010 Junio C Hamano.
#
case "$action" in
continue)
git am --resolved --resolvemsg="$resolvemsg" &&
move_to_original_branch
exit
;;
skip)
git am --skip --resolvemsg="$resolvemsg" &&
move_to_original_branch
exit
;;
esac
test -n "$rebase_root" && root_flag=--root
ret=0
if test -n "$keep_empty"
then
# we have to do this the hard way. git format-patch completely squashes
# empty commits and even if it didn't the format doesn't really lend
# itself well to recording empty patches. fortunately, cherry-pick
# makes this easy
git cherry-pick --allow-empty "$revisions"
ret=$?
else
rm -f "$GIT_DIR/rebased-patches"
git format-patch -k --stdout --full-index --ignore-if-in-upstream \
--src-prefix=a/ --dst-prefix=b/ \
--no-renames $root_flag "$revisions" >"$GIT_DIR/rebased-patches"
ret=$?
if test 0 != $ret
then
rm -f "$GIT_DIR/rebased-patches"
case "$head_name" in
refs/heads/*)
git checkout -q "$head_name"
;;
*)
git checkout -q "$orig_head"
;;
esac
cat >&2 <<-EOF
git encountered an error while preparing the patches to replay
these revisions:
$revisions
As a result, git cannot rebase them.
EOF
exit $?
fi
git am $git_am_opt --rebasing --resolvemsg="$resolvemsg" <"$GIT_DIR/rebased-patches"
ret=$?
rm -f "$GIT_DIR/rebased-patches"
fi
if test 0 != $ret
then
test -d "$state_dir" && write_basic_state
exit $ret
fi
move_to_original_branch