#!/bin/bash
#  lw-build-system/scripts/version.sh
#
#  Copyright: ©2007–2010, Laurence Withers
#  Author: Laurence Withers <l@lwithers.me.uk>
#  License: GPLv3
#
#  Script to automate bumping of version or soversion files, and pushing
#  changes (and tags) to the origin repository.
#

if [ $# -eq 0 ]
then
    echo "Usage: $0 COMMANDS"
    echo ""
    echo "  major         - bump major version, reset minor and micro"
    echo "  minor         - bump minor version, reset micro"
    echo "  micro         - bump micro version"
    echo "  libmajor LIB  - as major but for soversion"
    echo "  libmicro LIB  - as micro but for soversion"
    echo "  tag           - tag version"
    echo "  push          - do a git push with --tags"

    exit 1
fi

edit_versions() {
    file="$1"
    shift

    SEDCMD=""
    while [ $# -ne 0 ]
    do
        var="$1"
        shift
        value="$1"
        shift

        SEDCMD="${SEDCMD} -e s,^${var}=.*$,${var}=${value},"
    done
    sed ${SEDCMD} -i "${file}"
    git commit -m "Bump version" "${file}"
}

bump_major() {
    source "./version"
    edit_versions "version" "VERMAJOR" "$[${VERMAJOR} + 1]" "VERMINOR" "0" "VERMICRO" "0"
}

bump_minor() {
    source "./version"
    edit_versions "version" "VERMINOR" "$[${VERMINOR} + 1]" "VERMICRO" "0"
}

bump_micro() {
    source "./version"
    edit_versions "version" "VERMICRO" "$[${VERMICRO} + 1]"
}

bump_somajor() {
    source "./src/$1/soversion"
    edit_versions "src/$1/soversion" "SOMAJOR" "$[${SOMAJOR} + 1]" "SOMINOR" "0" "SOMICRO" "0"
}

bump_somicro() {
    source "./src/$1/soversion"
    edit_versions "src/$1/soversion" "SOMICRO" "$[${SOMICRO} + 1]"
}

do_tag() {
    source "./version"
    git tag "${VERMAJOR}.${VERMINOR}.${VERMICRO}"
}

do_push() {
    git push
    git push --tags
}

set -ex

while [ $# -ne 0 ]
do
    case $1 in
    major)
        bump_major
        ;;

    minor)
        bump_minor
        ;;

    micro)
        bump_micro
        ;;

    libmajor)
        bump_somajor $2
        shift
        ;;

    libmicro)
        bump_somicro $2
        shift
        ;;

    tag)
        do_tag
        ;;
    
    push)
        do_push
        ;;
    
    *)
        echo "Unrecognised command: $1"
        exit 1
        ;;
    esac

    shift
done

true

# vim:ts=4:sw=4:expandtab