#!/bin/bash

readonly THISSCRIPT=$0
readonly DISTRIB=$1
readonly BRANCH=$2
readonly FOLDER=$3

source /home/vinaigrette/config/config
export DEBSIGN_KEYID
export DEBFULLNAME
export DEBEMAIL

IMG="${PBUILDER_IMAGES}/${DISTRIB}-amd64.tgz"

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

function usage()
{
    cat << EOF

Usage:
  $THISSCRIPT <distrib> <branch> <folder>

Arguments:
  <distrib>     stretch (can only build for stretch, no jessie)
  <branch>      stable, testing, or unstable
  <folder>      the folder in which to build...
EOF
}


function main()
{
    validate_arguments
    retrieve_package_info
    build_sources
    add_to_reprepro

    echo "Build will start soon. See 'rebuildd-job list | tail'"
    sendxmpppy "Added builds for ${PACKAGE}/${VERSION} in branch ${BRANCH} ..."
}

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

function validate_arguments()
{
    # Distribution
    if [[ ! $DISTRIB =~ ^stretch$ ]]; then
        echo "Invalid distribution $DISTRIB"
        usage
        exit 1
    fi

    ## Branch
    if [[ ! $BRANCH =~ ^testing|stable|unstable$ ]]; then
        echo "Invalid branch $BRANCH"
        usage
        exit 2
    fi

    # Folder
    if [ -z "$FOLDER" ]; then
        echo "Need a folder in which to build"
        usage
        exit 3
    fi
}

function retrieve_package_info()
{
    readonly PKG_DIR=$(readlink -fn $FOLDER)
    readonly ROOT_DIR=$(readlink -fn ${PKG_DIR}/../)
    cd $PKG_DIR

    readonly PACKAGE=$(dpkg-parsechangelog | awk '/^Source: / {print $2}')
    readonly VERSION=$(dpkg-parsechangelog | awk '/^Version: / {print $2}')
    readonly CHANGES_FILE=${ROOT_DIR}/${PACKAGE}_${VERSION}_source.changes
}

# ######################################## #
# Invoke pbuilder to build the sources ... #
# ######################################## #

function build_sources()
{
    echo "---------------------------------------------------"
    echo "Building source package of ${PACKAGE}_${VERSION}..."
    echo "---------------------------------------------------"

    sudo pbuilder execute --bindmounts ${ROOT_DIR} --basetgz ${IMG} -- ${BUILD_SOURCES} $PKG_DIR

    if [ $? -ne 0 ] || [ ! -f ${CHANGES_FILE} ]; then
        echo "An error occured while building source package"
        exit 1
    fi
}

function add_to_reprepro()
{
    echo "---------------------------------------------------"
    echo "Adding ${PACKAGE}_${VERSION} to ${DISTRIB}/${BRANCH}..."
    echo "---------------------------------------------------"
    $INCLUDE_CHANGES $DISTRIB $BRANCH $CHANGES_FILE
    if [ $? -ne 0 ]; then
        echo "An error occured while including source package"
        exit 1
    fi
}

main