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#!/bin/bash
# vim: set sw=4 sts=4 et :
# Copyright: 2008 Gentoo Foundation
# Author(s): Nirbheek Chauhan <nirbheek.chauhan@gmail.com>
# License: GPL-2
#
# jobuild-functions.sh: Functions for jobuild.sh.
# 
# Immortal lh!
#

die() {
    echo "$*"
    exit 1
}

jvars() {
    P=${jobuild##*/}
    P=${P%.jobuild}
    PN=${P%-*}
    PV=${P##*-}
}

# Default function to generate a list of ATOMS to be used by the jobuild
# Should be overridden in the jobuild if required
atoms() {
    local temp
    temp="${jobuild%/*}/conf/${P}.atoms"
    [ -f "${temp}" ] && ATOMS=$(<"${temp}")
}

# Initialize some basic jobuild env variables
initialize() {
    jvars
    atoms
}

# POST ${2}=${3} to ${1}
# Usage: post ${where} ${key} ${data}
# Result is stored in ${POST}
post() {
    POST=$(wget "${1}"?"${2}"=${3} -O -)
}

# Wrapper for package managers
emerge() {
    case "${PMAN}"in
        emerge)
        local CMD="/usr/bin/emerge --verbose --newuse --deep"
        case ${1} in
            build)
            ${CMD} ${ATOMS}
            ;;
            build-binpkgs)
            ${CMD} --buildpkg ${ATOMS}
            ;;
            use-binpkgs)
            ${CMD} --usepkg --getbinpkg ${ATOMS}
            ;;
            *)
            die "Unsupported merge action ${1}"
            ;;
        esac
        ;;
        pmerge)
        die "pkgcore support not yet implemented"
        ;;
        paludis)
        die "paludis support not yet implemented"
        ;;
        *)
        ${PMAN} || die "Running custom package manager command ${PMAN} failed"
        ;;
    esac
}

has() {
    local this=${1}; shift
    local those=${@}
    for i in ${those}; do
	[ "${this}" == "${i}" ] && return 0
    done
    return 1
}

# Lifted shamelessly from pkgcore
unpack() {
    local x y myfail srcdir taropts tar_subdir
    taropts='--no-same-owner'

    [ -z "$*" ] && die "Nothing passed to the 'unpack' command"

    for x in "$@"; do
        echo ">>> Unpacking ${x} to ${PWD}"
        myfail="failure unpacking ${x}"
        y="${x%.*}"
        y="${y##*.}"
        if [ "${x:0:2}" == "./" ]; then
            srcdir=''
        else
            srcdir="${JOBFILES_DIR}"
        fi

        [ ! -s "${srcdir}${x}" ] && die "$myfail: empty file"
        [ "${x/${JOBFILES_DIR}}" != "${x}" ] && \
            die "Arguments to unpack() should not begin with \${JOBFILES_DIR}."

        case "${x}" in
            *.tar)
                tar xf "${srcdir}${x}" ${taropts} || die "$myfail"
                ;;
            *.tar.gz|*.tgz|*.tar.Z)
                tar xzf "${srcdir}${x}" ${taropts} || die "$myfail"
                ;;
            *.tar.bz2|*.tbz2|*.tbz)
                bzip2 -dc "${srcdir}${x}" | tar xf - ${taropts}
                assert "$myfail"
                ;;
            *.ZIP|*.zip|*.jar)
                unzip -qo "${srcdir}${x}" || die "$myfail"
                ;;
            *.gz|*.Z|*.z)
                gzip -dc "${srcdir}${x}" > ${x%.*} || die "$myfail"
                ;;
            *.bz2|*.bz)
                bzip2 -dc "${srcdir}${x}" > ${x%.*} || die "$myfail"
                ;;
            *.7Z|*.7z)
                local my_output
                my_output="$(7z x -y "${srcdir}/${x}")"
                if [ $? -ne 0 ]; then
                    echo "${my_output}" >&2
                    die "$myfail"
                fi
                ;;
            *.RAR|*.rar)
                unrar x -idq -o+ "${srcdir}/${x}" || die "$myfail"
                ;;
            *.LHa|*.LHA|*.lha|*.lzh)
                lha xfq "${srcdir}/${x}" || die "$myfail"
                ;;
            *.a|*.deb)
                ar x "${srcdir}/${x}" || die "$myfail"
                ;;
            *.lzma)
                if [ "${y}" == "tar" ]; then
                    lzma -dc "${srcdir}${x}" | tar xof - ${taropts}
                    assert "$myfail"
                else
                    lzma -dc "${srcdir}${x}" > ${x%.*} || die "$myfail"
                fi
                ;;
            *)
                echo "unpack ${x}: file format not recognized. Ignoring."
                ;;
        esac
    done
    find . -mindepth 1 -maxdepth 1 ! -type l -print0 | \
         xargs -0 chmod -fR a+rX,u+w,g-w,o-w
                        
}

src_unpack() {
    :
}

get_param() {
    # Param to extract
    local param="${1}"
    local jobuild="${2}"
    initialise

    if ! source "${jobuild}"; then
        die "Unable to source ${jobuild}"
    fi
    eval echo \$${param}
}

get_jobuild_path() {
    echo "${AUTOTUA_DIR}/jobtage/${1}"
}

run_all_phases() {
    local jobuild="${1}"
    initialise

    if ! source "${jobuild}"; then
        die "Unable to source ${jobuild}"
    fi
    src_unpack
    do_work
    cleanup
}