#!/bin/bash
source "/etc/java-ebuilder.conf"
tsh="/usr/lib/java-ebuilder/tree.sh"

clean-maven() {
    rm -f "${CACHEDIR}"/maven-cache
    rm -rf "${MAVEN_OVERLAY_DIR}"/app-maven
}

clean-pom() {
    rm -f "${POMDIR}"/*.pom
}

clean-cache() {
    rm -f "${CACHEDIR}"/cache.{raw,}{0,1}
    rm -f "${CACHEDIR}"/b{ebd,pom}
}

clean() {
    clean-cache
    clean-pom
    clean-maven
}

rrdep() {
    # regenerate reverse dependencies
    for rdep in $(egrep -l "$1.*->" -r "${MAVEN_OVERLAY_DIR}"/app-maven); do
	[[ ${rdep} = *.ebuild ]] && "${tsh}" ${rdep}
    done
}

refresh() {
    if [[ $1=*:* ]]; then
	rrdep $1
    else
	# input: package name
	for ebd in "${MAVEN_OVERLAY_DIR}"/app-maven/$1/*.ebuild; do
	    mid=$(sed -nr 's,^MAVEN_ID="(.*)",\1,p' "${ebd}")
	    rm "${ebd}"; "${tsh}" ${mid}
    	    sed "/${mid}/d" -i "${CACHEDIR}"/maven-cache
	    rrdep ${mid}
	done
    fi
}

build() {
    : ${PORTDIR:=$(portageq get_repo_path $(portageq envvar EROOT) gentoo)}
    : ${PORTAGE_TMPDIR:=$(portageq envvar PORTAGE_TMPDIR)}
    export PORTAGE_TMPDIR

    if [[ ! -f "${CACHEDIR}"/cache.0 ]]; then
        # 1. Generate cache of java related packages from portage tree.
        [[ -f "${CACHEDIR}"/cache.raw0 ]] || \
            java-ebuilder --refresh-cache -t "${PORTDIR}" --cache-file "${CACHEDIR}"/cache.raw0

        # 2. Find corresponding maven groupId, artifactId and version in the cache.
        pushd "${CACHEDIR}" > /dev/null
        ( echo 1.0; tail -n +2 cache.raw0 | parallel -j -1 /usr/lib/java-ebuilder/meta.sh; ) > cache.0
        popd > /dev/null
    fi

    # do the same to java overlay
    if [[ ! -f "${CACHEDIR}"/cache.1 ]]; then
        if [[ -n "${JAVA_OVERLAY_DIR}" ]]; then
            [[ -f "${CACHEDIR}"/cache.raw1 ]] || \
                java-ebuilder --refresh-cache -t "${JAVA_OVERLAY_DIR}" --cache-file "${CACHEDIR}"/cache.raw1
            pushd "${CACHEDIR}" > /dev/null
            tail -n +2 cache.raw1 | parallel -j -1 /usr/lib/java-ebuilder/meta.sh > cache.1
            popd > /dev/null
        else
            touch "${CACHEDIR}"/cache.1
        fi
    fi

    for M in ${MAVEN_ARTS}; do
        "${tsh}" ${M}
    done

    cd "${MAVEN_OVERLAY_DIR}"/app-maven
    parallel ebuild '$(echo {}/*.ebuild | cut -d\  -f1)' digest ::: *
}

if [[ $# -gt 0 ]]; then
    funcs=$1
    shift 1
else
    funcs=build
fi

for func in ${funcs}; do
    ${func} $@
done