# This shell script fragment is sourced by git-rebase to implement
# its merge-based non-interactive mode that copes well with renamed
# files.
#
# Copyright (c) 2010 Junio C Hamano.
#

prec=4

read_state () {
        onto_name=$(cat "$state_dir"/onto_name) &&
        end=$(cat "$state_dir"/end) &&
        msgnum=$(cat "$state_dir"/msgnum)
}

continue_merge () {
        test -d "$state_dir" || die "$state_dir 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 to use git add?"
                die "$resolvemsg"
        fi

        cmt=$(cat "$state_dir/current")
        if ! git diff-index --quiet --ignore-submodules HEAD --
        then
                if ! git commit ${gpg_sign_opt:+"$gpg_sign_opt"} --no-verify -C "$cmt"
                then
                        echo "Commit failed, please do not call \"git commit\""
                        echo "directly, but instead do one of the following: "
                        die "$resolvemsg"
                fi
                if test -z "$GIT_QUIET"
                then
                        printf "Committed: %0${prec}d " $msgnum
                fi
                echo "$cmt $(git rev-parse HEAD^0)" >> "$state_dir/rewritten"
        else
                if test -z "$GIT_QUIET"
                then
                        printf "Already applied: %0${prec}d " $msgnum
                fi
        fi
        test -z "$GIT_QUIET" &&
        GIT_PAGER='' git log --format=%s -1 "$cmt"

        # onto the next patch:
        msgnum=$(($msgnum + 1))
        echo "$msgnum" >"$state_dir/msgnum"
}

call_merge () {
        msgnum="$1"
        echo "$msgnum" >"$state_dir/msgnum"
        cmt="$(cat "$state_dir/cmt.$msgnum")"
        echo "$cmt" > "$state_dir/current"
        hd=$(git rev-parse --verify HEAD)
        cmt_name=$(git symbolic-ref HEAD 2> /dev/null || echo HEAD)
        eval GITHEAD_$cmt='"${cmt_name##refs/heads/}~$(($end - $msgnum))"'
        eval GITHEAD_$hd='$onto_name'
        export GITHEAD_$cmt GITHEAD_$hd
        if test -n "$GIT_QUIET"
        then
                GIT_MERGE_VERBOSITY=1 && export GIT_MERGE_VERBOSITY
        fi
        test -z "$strategy" && strategy=recursive
        # If cmt doesn't have a parent, don't include it as a base
        base=$(git rev-parse --verify --quiet $cmt^)
        eval 'git-merge-$strategy' $strategy_opts $base ' -- "$hd" "$cmt"'
        rv=$?
        case "$rv" in
        0)
                unset GITHEAD_$cmt GITHEAD_$hd
                return
                ;;
        1)
                git rerere $allow_rerere_autoupdate
                die "$resolvemsg"
                ;;
        2)
                echo "Strategy: $strategy failed, try another" 1>&2
                die "$resolvemsg"
                ;;
        *)
                die "Unknown exit code ($rv) from command:" \
                        "git-merge-$strategy $cmt^ -- HEAD $cmt"
                ;;
        esac
}

finish_rb_merge () {
        move_to_original_branch
        if test -s "$state_dir"/rewritten
        then
                git notes copy --for-rewrite=rebase <"$state_dir"/rewritten
                hook="$(git rev-parse --git-path hooks/post-rewrite)"
                test -x "$hook" && "$hook" rebase <"$state_dir"/rewritten
        fi
        say All done.
}

# 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__merge () {

case "$action" in
continue)
        read_state
        continue_merge
        while test "$msgnum" -le "$end"
        do
                call_merge "$msgnum"
                continue_merge
        done
        finish_rb_merge
        return
        ;;
skip)
        read_state
        git rerere clear
        msgnum=$(($msgnum + 1))
        while test "$msgnum" -le "$end"
        do
                call_merge "$msgnum"
                continue_merge
        done
        finish_rb_merge
        return
        ;;
esac

mkdir -p "$state_dir"
echo "$onto_name" > "$state_dir/onto_name"
write_basic_state

msgnum=0
for cmt in $(git rev-list --reverse --no-merges "$revisions")
do
        msgnum=$(($msgnum + 1))
        echo "$cmt" > "$state_dir/cmt.$msgnum"
done

echo 1 >"$state_dir/msgnum"
echo $msgnum >"$state_dir/end"

end=$msgnum
msgnum=1

while test "$msgnum" -le "$end"
do
        call_merge "$msgnum"
        continue_merge
done

finish_rb_merge

}
# ... and then we call the whole thing.
git_rebase__merge