#!/bin/bash

readonly THISSCRIPT=$0
readonly BRANCH_NIGHTLY="unstable"
readonly DISTRIB="stretch"
readonly TIMETAG="$(date +%Y%m%d%H%M)"
readonly PACKAGES="moulinette SSOwat yunohost yunohost-admin"

source /home/vinaigrette/config/config


function main()
{
    for PACKAGE in $PACKAGES;
    do

        echo "-------------------------------------"
        echo "Looking for update in ${PACKAGE} ... "

        build_if_needed $PACKAGE

    done
    echo "-------------------------------------"
}


function build_if_needed()
{
    local PACKAGE=$1

    cd $GIT_REPOS/$PACKAGE

    git fetch origin
    git checkout $BRANCH_NIGHTLY >/dev/null 2>/dev/null
    if [ -z "$(git log $BRANCH_NIGHTLY..origin/$BRANCH_NIGHTLY)" ]; then
        echo "Sources up-to-date, nothing to build."
        return
    fi
    git pull origin $BRANCH_NIGHTLY >/dev/null

    VERSION=$(dpkg-parsechangelog -S Version 2>/dev/null)
    VERSION_NIGHTLY="${VERSION}~${TIMETAG}"

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

    head -n 10 debian/changelog

    # Launch the build using build_deb script
    build

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

}

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

   # Move files to a tmp folder
   echo "> Exporting in $TMP_FOLDER ...  "
   git ls-files | xargs tar -czf archive.tar.gz 
   cat archive.tar.gz | tar -xz -C $TMP_FOLDER
   rm archive.tar.gz

   # Build Debian package
   echo "> Starting build ..."
   cd $TMP_FOLDER
   $BUILD_DEB -d $BRANCH_NIGHTLY -c $DISTRIB .
}

main