#! /bin/bash

# vim: et:sts=4:sw=4

#############################################################################

# Copyright (c) 2004-2006,2008,2009 Novell, Inc.

# All Rights Reserved.

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of version 2 of the GNU General Public License as

# published by the Free Software Foundation.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.   See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, contact Novell, Inc.

#

# To contact Novell about this file by physical or electronic mail,

# you may find current contact information at www.novell.com

#############################################################################

if test -x "${0}2" -a ! -e kernel-source.changes; then

	# hand over to scripts/log2

	exec "${0}2" "$@"

fi

# Construct a changes entry and commit log from a patch.

. ${0%/*}/wd-functions.sh

if ! $using_git; then

    echo "ERROR: not in a git working directory."

    exit 1

fi

scripts/check-cvs-add || exit 1

CHANGES=kernel-source.changes

trap 'rm -rf "$tmpdir"' EXIT

tmpdir=$(mktemp -d /tmp/${0##*/}.XXXXXX)

message=$tmpdir/message

log_entry() {

    local entry=$1

    echo "$entry" \

    | fmt --width 65 \

    | sed -e '1s/^/- /' -e '2,$s/^/  /' \

    >> $message

}

patch_meta() {

    local patch=$1

    subject=$(formail -c -x Subject < "$patch" \

             | sed -e 's, *\[[#/ A-Za-z0-9-]*\],,')

    subject=${subject##:}

    subject=${subject## }

    subject=${subject%.}

    # allow one blank line before the References: header

    set -- $(awk '

	/^References:/ { sub(/^References:/, ""); print; exit }

	/^$/ { if (++blank > 1) exit }' "$patch")

    references="$*"

    case "$references" in

    None | none)

        references=

    esac

}

patch_log_entry() {

    local patch=$1 subject references old_subj old_ref old_patch="$tmpdir/old"

    git show "HEAD:$patch" >"$old_patch" 2>/dev/null

    patch_meta "$old_patch"

    old_subj="$subject"

    old_ref="$references"

    patch_meta "$patch"

    local msg

    if test -z "$subject" -o "$subject" != "$old_subj"; then

        msg="$subject${references:+ ($references)}"

    elif test "$references" != "$old_ref"; then

        if test -n "$references"; then

            msg="Update references ($references)"

        fi

    else

        msg="Refresh"

    fi

    log_entry "$patch: $msg${msg:+.}"

}

for file in "$@" $(scripts/cvs-touched-files); do

    [ "${file:(-8)}" = ".changes" ] && continue

    files[${#files[@]}]=$file

done

if [ ${#files[@]} -eq 0 ]; then

    echo "No modified files" >&2

    exit 1

fi

for file in "${files[@]}"; do

    if [ "${file:0:1}" = - ]; then

	log_entry "${file:1}: Delete."

    else

	case "$file" in

	    config/*)

		if [ -z "$configs_updated" ]; then

		    log_entry "Update config files."

		    configs_updated=1

		fi

		;;

	    patches.*)

		patch_log_entry "$file"

		;;

	    kabi/*/symvers-* | kabi/*/symtypes-* | kabi/*/symsets-* )

		if [ -z "$symvers_updated" ]; then

		    log_entry "Update reference module symbol versions."

		    symvers_updated=1

		fi

	    	;;

	    series.conf)

		# don't log changes in there

		;;

	    *)

		log_entry "$file: "

		;;

	esac

    fi

done

if [ ! -s $message ]; then

    echo "- " >> $message

fi

if [ -z "$VC" ]; then

    VC=vc

    for search in $HOME/bin /work/src/bin scripts; do

	if [ -x $search/$VC ]; then

	    VC=$search/$VC

	    break

	fi

    done

fi

if $VC $CHANGES $message; then

    entry=$(sed -ne '1,2d' -e '/^--*$/!p' -e '/^--*$/q' $CHANGES)

    entry=${entry##$'\n'}

    entry=${entry%%$'\n'}

    echo "$entry" > $message

    while :; do

	echo

	sed -e 's:^:| :' $message

	echo

	echo -n "Commit with the above changelog entry: ([y]es), [n]o, [e]dit? "

	read yesno && \

	case "$yesno" in

	    "" | [yY] | yes)

                git add $CHANGES

                # XXX don't commit -a?

                git commit -a -F $message || exit

                branch=$(get_branch_name)

                case "$branch" in

                master | stable | vanilla | linux-next | openSUSE-??.? | \

                SLE?? | SLE*-ARM | SLE??-SP? | SLE*-RT | SLE*-TD | SLE*-LTSS | \

                cve/linux-* | packaging | scripts)

                    remote=$(get_git_remote "$branch")

                    user=$(get_git_user "$remote")

                    echo "after testing your changes, run"

                    echo "    git push $remote HEAD:users/$user/$branch/for-next"

                esac

		break ;;

	    [nN] | no)

		break ;;

	    [eE] | edit)

		${EDITOR:-vi} $message

		;;

	esac

    done

fi