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| | #!/bin/sh
# This shell script fragment is sourced by git-rebase to implement
# its interactive mode with --preserve-merges flag.
# "git rebase --interactive" makes it easy to fix up commits in the
# middle of a series and rearrange commits and adding --preserve-merges
# requests it to preserve merges while rebase.
#
# Copyright (c) 2006 Johannes E. Schindelin
#
# The original idea comes from Eric W. Biederman, in
# https://public-inbox.org/git/m1odwkyuf5.fsf_-_@ebiederm.dsl.xmission.com/
. git-rebase--interactive--lib
# The whole contents of this file is run by dot-sourcing it from
# inside a shell function. It used to be that "return"s we see
# below were not inside any function, and expected to return
# to the function that dot-sourced us.
#
# However, older (9.x) versions of FreeBSD /bin/sh misbehave on such a
# construct and continue to run the statements that follow such a "return".
# As a work-around, we introduce an extra layer of a function
# here, and immediately call it after defining it.
git_rebase__interactive__preserve_merges () {
initiate_action "$action"
ret=$?
if test $ret == 0; then
return 0
fi
setup_reflog_action
init_basic_state
if test -z "$rebase_root"
then
mkdir "$rewritten" &&
for c in $(git merge-base --all $orig_head $upstream)
do
echo $onto > "$rewritten"/$c ||
die "$(gettext "Could not init rewritten commits")"
done
else
mkdir "$rewritten" &&
echo $onto > "$rewritten"/root ||
die "$(gettext "Could not init rewritten commits")"
fi
# No cherry-pick because our first pass is to determine
# parents to rewrite and skipping dropped commits would
# prematurely end our probe
merges_option=
shorthead=$(git rev-parse --short $orig_head)
shortonto=$(git rev-parse --short $onto)
if test -z "$rebase_root"
# this is now equivalent to ! -z "$upstream"
then
shortupstream=$(git rev-parse --short $upstream)
revisions=$upstream...$orig_head
shortrevisions=$shortupstream..$shorthead
else
revisions=$onto...$orig_head
shortrevisions=$shorthead
fi
# The 'rev-list .. | sed'
# requires %m to parse; where as the the instruction
# requires %H to parse
format=$(git config --get rebase.instructionFormat)
git rev-list $merges_option --format="%m%H ${format:-%s}" \
--reverse --left-right --topo-order \
$revisions ${restrict_revision+^$restrict_revision} | \
sed -n "s/^>//p" |
while read -r sha1 rest
do
if test -z "$keep_empty" \
&& is_empty_commit $sha1 \
&& ! is_merge_commit $sha1
then
comment_out="$comment_char "
else
comment_out=
fi
if test -z "$rebase_root"
then
preserve=t
for p in $(git rev-list --parents -1 $sha1 | \
cut -d' ' -s -f2-)
do
if test -f "$rewritten"/$p
then
preserve=f
fi
done
else
preserve=f
fi
if test f = "$preserve"
then
touch "$rewritten"/$sha1
printf '%s\n' "${comment_out}pick $sha1 $rest" >>"$todo"
fi
done
mkdir "$dropped"
# Save all non-cherry-picked changes
git rev-list $revisions --left-right --cherry-pick | \
sed -n "s/^>//p" > "$state_dir"/not-cherry-picks
# Now all commits and note which ones are missing in
# not-cherry-picks and hence being dropped
git rev-list $revisions |
while read rev
do
if test -f "$rewritten"/$rev &&
! sane_grep "$rev" "$state_dir"/not-cherry-picks >/dev/null
then
# Use -f2 because if rev-list is telling us this commit
# is not worthwhile, we don't want to track its
# multiple heads, just the history of its first-parent
# for others that will be rebasing on top of it.
git rev-list --parents -1 $rev | \
cut -d' ' -s -f2 > "$dropped"/$rev
sha1=$(git rev-list -1 $rev)
sane_grep -v "^[a-z][a-z]* $sha1" <"$todo" > "${todo}2"
mv "${todo}2" "$todo"
rm "$rewritten"/$rev
fi
done
complete_action
}
# ... and then we call the whole thing.
git_rebase__interactive__preserve_merges
|