#!/bin/bash

readonly THISSCRIPT=$0
readonly PACKAGE=$1
readonly BRANCH=$2
readonly DISTRIB="stretch"

source /home/vinaigrette/config/config
source /home/vinaigrette/scripts/common.sh

# ##### #
# Usage #
# ##### #

function usage()
{
    cat << EOF

Usage:
  $THISSCRIPT <project> <branch> <version>

Arguments:
  <project>     metronome, rspamd or unscd
  <branch>      stable, testing or unstable

EOF
}

function main()
{
    validate_arguments
    cd $GIT_REPOS/$PACKAGE
    tweak_$PACKAGE
    build
}

# ################# #
# Check user inputs #
# ################# #

function validate_arguments()
{
    [[ $PACKAGE =~ ^metronome|rspamd|unscd$ ]] || critical "Invalid package $PACKAGE"
    [[ $BRANCH =~ ^testing|stable|unstable$ ]] || critical "Invalid branch $BRANCH"
    [[ "$(tty)" != "not a tty" ]] || critical "You aint in a tty (are you in a 'lxc exec' ?) The script can't run because pbuilder won't be happy :|"
}

# ##################### #
# Build recipe / tweaks #
# ##################### #

function tweak_metronome()
{
    # For some reason metronome version must include a revision ("-x")
    readonly VERSION="$(dpkg-parsechangelog -S Version 2>/dev/null)+yunohost-1"
}

function tweak_unscd()
{
    readonly VERSION="$(dpkg-parsechangelog -S Version 2>/dev/null)+yunohost"
}

function tweak_rspamd()
{
    git checkout master
    git pull origin master

    # Get last tag and deduce version number to user...
    local LASTTAG=$(git tag --list | grep "^1." | sort -n | tail -n1)
    readonly VERSION="${LASTTAG}+yunohost"
    git checkout $LASTTAG
}

function build()
{
    # SVERSION is VERSION without the -1 at the end ...
    local SVERSION=$(echo $VERSION | tr '-' ' ' | awk '{print $1}')

    cd $GIT_REPOS/$PACKAGE

    # Tweak the changelog temporarily
    info "Setting version in changelog to ${VERSION}"
    rm -f debian/changelog.dch
    cp debian/changelog debian/changelog.old
    dch --package "${PACKAGE}" \
        --force-bad-version \
	-v "${VERSION}" \
	-D "${BRANCH}" \
	--force-distribution \
	"YunoHost custom build." \
        > /dev/null 2>&1

    # Create temporary folder
    TMP_FOLDER=$(mktemp -d)

    # Extract git archive a desired tag
    info "Exporting in $TMP_FOLDER ...  "
    git ls-files | xargs tar -czf archive.tar.gz
    cat archive.tar.gz | tar -xz -C $TMP_FOLDER
    # For some reason, these wants archive named
    # e.g. metronome_x.y.z+stuff.orig.tar.gz
    # in the parent folder...
    mv archive.tar.gz $TMP_FOLDER/../${PACKAGE}_${SVERSION}.orig.tar.gz

    # Build Debian package
    cd $TMP_FOLDER
    $BUILD_DEB $DISTRIB $BRANCH .

    # Restore changelog
    info "Restoring previous changelog"
    cd $GIT_REPOS/$PACKAGE
    cp debian/changelog.old debian/changelog
    rm debian/changelog.old
}

[[ "$1" =~ ^-h|--help$ ]] && (usage; exit 0) || main