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#!/usr/bin/env bash
# vim: set sw=4 sts=4 et :

# Copyright (c) 2006, 2007, 2008 Ciaran McCreesh
#
# Based in part upon ebuild.sh from Portage, which is Copyright 1995-2005
# Gentoo Foundation and distributed under the terms of the GNU General
# Public License v2.
#
# This file is part of the Paludis package manager. Paludis is free software;
# you can redistribute it and/or modify it under the terms of the GNU General
# Public License, version 2, as published by the Free Software Foundation.
#
# Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place, Suite 330, Boston, MA  02111-1307  USA

if [[ -e ${ROOT}/etc/profile.env ]] && ! source "${ROOT}"/etc/profile.env; then
    echo "error sourcing ${ROOT}/etc/profile.env" >&2
    exit 123
fi

# Force a few more things into PATH, since some users have crazy setups.
# See ticket:374.
export PATH="/bin:/sbin:/usr/bin:/usr/sbin:${PATH}"

unalias -a
set +C
unset GZIP BZIP BZIP2 CDPATH GREP_OPTIONS GREP_COLOR GLOBIGNORE
eval unset LANG ${!LC_*}
export LC_ALL=C

# The list below should include all variables from all EAPIs
EBUILD_METADATA_VARIABLES="DEPEND RDEPEND PDEPEND IUSE SRC_URI DOWNLOADS RESTRICT \
    LICENSE LICENCES KEYWORDS INHERITED PROVIDE HOMEPAGE DESCRIPTION DEPENDENCIES \
    E_IUSE E_DEPEND E_RDEPEND E_PDEPEND PLATFORMS \
    MYOPTIONS E_MYOPTIONS E_DEPENDENCIES BINARY_KEYWORDS BINARY_URI \
    GENERATED_USING GENERATED_TIME BINARY_PLATFORMS REMOTE_IDS \
    SUMMARY BUGS_TO UPSTREAM_DOCUMENTATION UPSTREAM_CHANGELOG \
    UPSTREAM_RELEASE_NOTES PROPERTIES"
unset -v ${EBUILD_METADATA_VARIABLES} ${PALUDIS_EBUILD_MUST_NOT_SET_VARIABLES}
# These can be set by C++
EBUILD_METADATA_VARIABLES="${EBUILD_METADATA_VARIABLES} SLOT EAPI OPTIONS USE"

if [[ -z "${PALUDIS_DO_NOTHING_SANDBOXY}" ]] ; then
    export SANDBOX_PREDICT="${SANDBOX_PREDICT+${SANDBOX_PREDICT}:}"
    export SANDBOX_PREDICT="${SANDBOX_PREDICT}/proc/self/maps:/dev/console:/dev/random"
    export SANDBOX_WRITE="${SANDBOX_WRITE+${SANDBOX_WRITE}:}"
    export SANDBOX_WRITE="${SANDBOX_WRITE}/dev/shm:/dev/stdout:/dev/stderr:/dev/null:/dev/tty:/dev/pts"
    export SANDBOX_WRITE="${SANDBOX_WRITE}:${PALUDIS_TMPDIR}:/var/cache"
    export SANDBOX_WRITE="${SANDBOX_WRITE}:/proc/self/attr:/proc/self/task:/selinux/context"
    export SANDBOX_ON="1"
    export SANDBOX_BASHRC="/dev/null"
    unset BASH_ENV
fi

shopt -s expand_aliases
shopt -s extglob

export ROOT="${ROOT%+(/)}/"

export EBUILD_PROGRAM_NAME="$0"

if [[ -n "${PALUDIS_EBUILD_DIR_FALLBACK}" ]] ; then
    export PATH="${PALUDIS_EBUILD_DIR_FALLBACK}/utils:${PATH}"
fi
export PATH="${PALUDIS_EBUILD_DIR}/utils:${PATH}"
for p in ${PALUDIS_UTILITY_PATH_SUFFIXES} ; do
    export PATH="${PALUDIS_EBUILD_DIR}/utils/${p}:${PATH}"
done

EBUILD_MODULES_DIR=$(canonicalise $(dirname $0 ) )
if ! [[ -d ${EBUILD_MODULES_DIR} ]] ; then
    echo "${EBUILD_MODULES_DIR} is not a directory" 1>&2
    exit 123
fi

# Upgrade from back when 0/ wasn't its own dir.
[[ -z "${PALUDIS_EBUILD_MODULE_SUFFIXES}" ]] && PALUDIS_EBUILD_MODULE_SUFFIXES=0
for p in ${PALUDIS_EBUILD_MODULE_SUFFIXES}; do
    EBUILD_MODULES_DIRS="${EBUILD_MODULES_DIRS} ${EBUILD_MODULES_DIR}/${p}"
done
for p in ${PALUDIS_EXTRA_EBUILD_MODULES_DIRS} ; do
    EBUILD_MODULES_DIRS="${EBUILD_MODULES_DIRS} ${p}"
done
EBUILD_MODULES_DIRS="${EBUILD_MODULES_DIRS} ${EBUILD_MODULES_DIR}"

export PALUDIS_EBUILD_MODULES_DIR="${EBUILD_MODULES_DIR}"

export EBUILD_KILL_PID=$$
declare -r EBUILD_KILL_PID

ebuild_load_module()
{
    local t= d=
    for d in ${EBUILD_MODULES_DIRS}; do
        if [[ -f "${d}/${1}.bash" ]]; then
            if ! source "${d}/${1}.bash"; then
                type die &>/dev/null && eval die "\"Error loading module \${1}\""
                echo "Error loading module ${1}" 1>&2
                exit 123
            fi
            return
        else
            t="${t:+${t}, }${d}"
        fi
    done
    type die &>/dev/null && eval die "\"Couldn't find module \${1} (looked in \${t})\""
    echo "Couldn't find module ${1} (looked in ${t})" 1>&2
    exit 123
}

ebuild_load_module pipe_functions
ebuild_load_module die_functions
ebuild_load_module output_functions
ebuild_load_module echo_functions
ebuild_load_module list_functions
ebuild_load_module source_functions

if [[ -z ${PALUDIS_LOAD_MODULES} ]]; then
    PALUDIS_LOAD_MODULES="
        conditional_functions kernel_functions sandbox portage_stubs
        multilib_functions install_functions build_functions"
    for m in eclass_functions exlib_functions ever_functions; do
        for d in ${EBUILD_MODULES_DIRS}; do
            if [[ -f "${d}/${1}.bash" ]]; then
                PALUDIS_LOAD_MODULES="${PALUDIS_LOAD_MODULES} ${m}"
                break
            fi
        done
    done
fi

for m in ${PALUDIS_LOAD_MODULES}; do
    ebuild_load_module ${m}
done

[[ -z ${PALUDIS_EBUILD_FUNCTIONS} ]] && PALUDIS_EBUILD_FUNCTIONS="
    builtin_infovars builtin_init builtin_initrm builtin_initmisc
    builtin_loadenv builtin_metadata builtin_killold builtin_killoldrm
    builtin_killoldmisc builtin_saveenv builtin_tidyup builtin_tidyuprm
    builtin_tidyupmisc builtin_variable
    pkg_config pkg_info pkg_nofetch pkg_postinst pkg_postrm
    pkg_preinst pkg_prerm pkg_pretend pkg_setup pkg_bad_options
    src_compile src_configure src_install src_prepare src_test src_unpack"

check_paludis_pipe_command()
{
    [[ -n "${PALUDIS_SKIP_PIPE_COMMAND_CHECK}" ]] && return
    [[ -z "${PALUDIS_PIPE_COMMANDS_SUPPORTED}" ]] && return

    pcr=$(paludis_pipe_command PING DUNNOYET $$ )
    [[ "$pcr" == "PONG $$" ]] || die "paludis_pipe_command isn't working (got '$pcr')"
}

check_paludis_pipe_command

export PALUDIS_HOME="$(canonicalise ${PALUDIS_HOME:-${HOME}} )"

ebuild_source_profile()
{
    if [[ -f ${1}/parent ]] ; then
        while read line ; do
            grep --silent '^[[:space:]]*#' <<<"${line}" && continue
            grep --silent '[^[:space:]]' <<<"${line}" || continue
            ebuild_source_profile $(canonicalise ${1}/${line} )
        done <${1}/parent
    fi

    local old_set=$-
    set -a

    if [[ -f ${1}/make.defaults ]] ; then
        source ${1}/make.defaults || die "Couldn't source ${1}/make.defaults"
    fi

    if [[ -f ${1}/bashrc ]] ; then
        source ${1}/bashrc || die "Couldn't source ${1}/bashrc"
    fi

    [[ "${old_set}" == *a* ]] || set +a
}

export CONFIG_PROTECT="${PALUDIS_CONFIG_PROTECT}"
export CONFIG_PROTECT_MASK="${PALUDIS_CONFIG_PROTECT_MASK}"
save_vars="$(eval echo ${PALUDIS_SAVE_VARIABLES} )"
save_base_vars="$(eval echo ${PALUDIS_SAVE_BASE_VARIABLES} )"
save_unmodifiable_vars="$(eval echo ${PALUDIS_SAVE_UNMODIFIABLE_VARIABLES} )"
check_save_vars="${save_vars}"
check_base_vars="${save_base_vars}"
check_unmodifiable_vars="${save_unmodifiable_vars}"

for var in ${save_vars} ${default_save_vars} ${save_base_vars} ${save_unmodifiable_vars} ; do
    eval "export save_var_${var}='${!var}'"
done

if [[ -n "${PALUDIS_PROFILE_DIRS}" ]] ; then
    for var in ${PALUDIS_PROFILE_DIRS} ; do
        ebuild_source_profile $(canonicalise "${var}")
    done
elif [[ -n "${PALUDIS_PROFILE_DIR}" ]] ; then
    ebuild_source_profile $(canonicalise "${PALUDIS_PROFILE_DIR}")
fi

unset ${save_vars} ${save_base_vars}

for f in ${PALUDIS_BASHRC_FILES} ; do
    if [[ -f ${f} ]] ; then
        ebuild_notice "debug" "Loading bashrc file ${f}"
        old_set=$-
        set -a
        source ${f}
        [[ "${old_set}" == *a* ]] || set +a
    else
        ebuild_notice "debug" "Skipping bashrc file ${f}"
    fi

    for var in ${check_save_vars} ; do
        if [[ -n ${!var} ]] ; then
            die "${f} attempted to set \$${var}, which must not be set in bashrc."
        fi
    done

    for var in ${check_save_unmodifiable_vars} ; do
        s_var=save_var_${var}
        if [[ "${!s_var}" != "${!var}" ]] ; then
            die "${f} attempted to modify \$${var}, which must not be modified in bashrc."
        fi
    done
done

for var in ${save_vars} ; do
    eval "export ${var}=\${save_var_${var}}"
done

for var in ${save_base_vars} ; do
    eval "export ${var}=\"\${save_var_${var}} \$$(echo ${var})\""
done

if [[ -z "${PALUDIS_DO_NOTHING_SANDBOXY}" ]] ; then
    [[ -n "${CCACHE_DIR}" ]] && export SANDBOX_WRITE="${SANDBOX_WRITE}:${CCACHE_DIR}"
fi

[[ -z "${CBUILD}" ]] && export CBUILD="${CHOST}"
export REAL_CHOST="${CHOST}"

ebuild_scrub_environment()
{
    local save_LD_LIBRARY_PATH="${LD_LIBRARY_PATH}"
    (
        ebuild_safe_source "${1}" PATH PALUDIS_SOURCE_MERGED_VARIABLES \
            PALUDIS_BRACKET_MERGED_VARIABLES || exit 1

        unset -f diefunc perform_hook inherit builtin_loadenv builtin_saveenv
        unset -f ebuild_safe_source portageq best_version has_version paludis_pipe_command
        unset -f paludis_rewrite_var

        if [[ "${2}" == "--pivot" ]] ; then
            unset -f ${PALUDIS_IGNORE_PIVOT_ENV_FUNCTIONS}
            unset -v ${PALUDIS_IGNORE_PIVOT_ENV_VARIABLES}
        fi

        unset -v ROOTPATH T TEMP HOME TMPDIR PORTDIR FILESDIR ECLASSDIR DISTDIR
        unset -v SKIP_FUNCTIONS FETCHEDDIR REPODIR EAPI FILES PKGMANAGER

        unset -v ${!GTKPALUDIS_CMDLINE_*} GTKPALUDIS_OPTIONS
        unset -v ${!ADJUTRIX_CMDLINE_*} ADJUTRIX_OPTIONS
        unset -v ${!QUALUDIS_CMDLINE_*} QUALUDIS_OPTIONS
        unset -v ${!RECONCILIO_CMDLINE_*} RECONCILIO_OPTIONS
        eval unset -v $(
            PALUDIS_CLIENT_UPPER=$(echo ${PALUDIS_CLIENT} | tr a-z A-Z)
            echo "\${!${PALUDIS_CLIENT_UPPER}_CMDLINE_*} ${PALUDIS_CLIENT_UPPER}_OPTIONS" )

        unset -v CATEGORY PN PV P PNV PVR PF PNVR ${!LD_*}

        unset -v ebuild EBUILD
        unset -v $(
            for v in ${PALUDIS_SOURCE_MERGED_VARIABLES} ${PALUDIS_BRACKET_MERGED_VARIABLES} ; do
                echo E_${v}
            done )
        unset -v ${!PALUDIS_*}

        unset -v $(
            for v in ${!SANDBOX_*}; do
                [[ ${v} != SANDBOX_ACTIVE ]] && echo ${v}
            done )
        export -n SANDBOX_ACTIVE

        unset -v $(
            for v in ${!BASH_*}; do
                [[ ${v#BASH_} != @(ARGC|ARGV|LINENO|SOURCE|VERSINFO|REMATCH) ]] && echo ${v}
            done )

        set >"${1}"
        LD_LIBRARY_PATH="${save_LD_LIBRARY_PATH}" print_exports >>"${1}"
    )
}

ebuild_load_environment()
{
    if [[ -n "${PALUDIS_LOAD_ENVIRONMENT}" ]] ; then
        [[ -d ${PALUDIS_TMPDIR} ]] \
            || die "You need to create PALUDIS_TMPDIR (${PALUDIS_TMPDIR})."

        local save_PALUDIS_EXTRA_DIE_MESSAGE="${PALUDIS_EXTRA_DIE_MESSAGE}"
        export PALUDIS_EXTRA_DIE_MESSAGE="
!!! Could not extract the saved environment file. This is usually
!!! caused by a broken environment.bz2 that was generated by an old
!!! Portage version. The file that needs repairing is:
!!!     ${PALUDIS_LOAD_ENVIRONMENT}
!!! Try copying this file, bunzip2ing it and sourcing it using a new
!!! bash shell (do not continue to use said shell afterwards). You
!!! should get an error that gives you a rough idea of where the
!!! problem lies.
"

        if [[ "${PALUDIS_LOAD_ENVIRONMENT%.bz2}" != "${PALUDIS_LOAD_ENVIRONMENT}" ]] ; then
            echo bunzip2 \< "${PALUDIS_LOAD_ENVIRONMENT}" \> ${PALUDIS_TMPDIR}/environment-${CATEGORY}-${!PALUDIS_NAME_VERSION_REVISION_VAR}-$$ 1>&2
            bunzip2 < "${PALUDIS_LOAD_ENVIRONMENT}" > ${PALUDIS_TMPDIR}/environment-${CATEGORY}-${!PALUDIS_NAME_VERSION_REVISION_VAR}-$$ \
                || die "Can't extract ${PALUDIS_LOAD_ENVIRONMENT}"
        else
            echo cp "${PALUDIS_LOAD_ENVIRONMENT}" "${PALUDIS_TMPDIR}/environment-${CATEGORY}-${!PALUDIS_NAME_VERSION_REVISION_VAR}-$$" 1>&2
            cp "${PALUDIS_LOAD_ENVIRONMENT}" "${PALUDIS_TMPDIR}/environment-${CATEGORY}-${!PALUDIS_NAME_VERSION_REVISION_VAR}-$$" \
                || die "Can't copy ${PALUDIS_LOAD_ENVIRONMENT}"
        fi

        echo ebuild_scrub_environment "${PALUDIS_TMPDIR}/environment-${CATEGORY}-${!PALUDIS_NAME_VERSION_REVISION_VAR}-$$" "$@" 1>&2
        ebuild_scrub_environment "${PALUDIS_TMPDIR}/environment-${CATEGORY}-${!PALUDIS_NAME_VERSION_REVISION_VAR}-$$" "$@" \
            || die "Can't load saved environment for cleaning"

        echo ebuild_safe_source "${PALUDIS_TMPDIR}/environment-${CATEGORY}-${!PALUDIS_NAME_VERSION_REVISION_VAR}-$$" 1>&2
        ebuild_safe_source "${PALUDIS_TMPDIR}/environment-${CATEGORY}-${!PALUDIS_NAME_VERSION_REVISION_VAR}-$$" \
            || die "Can't load saved environment"

        export PALUDIS_EXTRA_DIE_MESSAGE="${save_PALUDIS_EXTRA_DIE_MESSAGE}"

        echo rm "${PALUDIS_TMPDIR}/environment-${CATEGORY}-${!PALUDIS_NAME_VERSION_REVISION_VAR}-$$" 1>&2
        rm "${PALUDIS_TMPDIR}/environment-${CATEGORY}-${!PALUDIS_NAME_VERSION_REVISION_VAR}-$$"
    fi
}

ebuild_load_ebuild()
{
    unset ${SOURCE_MERGED_VARIABLES} ${BRACKET_MERGED_VARIABLES}

    local v e_v
    for v in ${PALUDIS_MUST_NOT_CHANGE_VARIABLES} ; do
        e_v=saved_${v}
        local ${e_v}="${!v}"
    done

    [[ -f "${1}" ]] || die "Ebuild '${1}' is not a file"
    source ${1} || die "Error sourcing ebuild '${1}'"

    if [[ -n "${PALUDIS_RDEPEND_DEFAULTS_TO_DEPEND}" ]] ; then
        [[ ${RDEPEND-unset} == "unset" ]] && RDEPEND="${DEPEND}"
    fi

    for v in ${PALUDIS_SOURCE_MERGED_VARIABLES} ; do
        e_v=E_${v}
        export -n ${v}="${!v} ${!e_v}"
    done

    for v in ${PALUDIS_BRACKET_MERGED_VARIABLES} ; do
        e_v=E_${v}
        export -n ${v}="( ${!v} ) ${!e_v}"
    done

    [[ ${EAPI-unset} == "unset" ]] && EAPI="0"

    for v in ${PALUDIS_MUST_NOT_CHANGE_VARIABLES} ; do
        s_v="saved_${v}"
        if [[ -n "${!s_v}" ]] && [[ "${!v}" != "${!s_v}" ]] ; then
            ebuild_notice "qa" \
                "Ebuild ${1} illegally tried to change ${v} from '${!s_v}' to '${!v}'"
            export ${v}="${!s_v}"
        fi
    done
}

perform_hook()
{
    export HOOK=${1}
    ebuild_notice "debug" "Starting hook '${HOOK}'"

    local old_sandbox_on="${SANDBOX_ON}"
    [[ -z "${PALUDIS_DO_NOTHING_SANDBOXY}" ]] && export SANDBOX_ON="0"

    local hook_dir
    for hook_dir in ${PALUDIS_HOOK_DIRS} ; do
        [[ -d "${hook_dir}/${HOOK}" ]] || continue
        local hook_file
        for hook_file in "${hook_dir}/${HOOK}/"*.bash ; do
            [[ -e "${hook_file}" ]] || continue
            ebuild_notice "debug" "Starting hook script '${hook_file}' for '${HOOK}'"
            if ! ( source "${hook_file}" ) ; then
                ebuild_notice "warning" "Hook '${hook_file}' returned failure"
            else
                ebuild_notice "debug" "Hook '${hook_file}' returned success"
            fi
        done
    done

    [[ -z "${PALUDIS_DO_NOTHING_SANDBOXY}" ]] && export SANDBOX_ON="${old_sandbox_on}"
    true
}

paludis_phase_to_function_name() {
    local p
    for p in builtin src pkg; do
        if has ${p}_${1} ${PALUDIS_EBUILD_FUNCTIONS}; then
            echo ${p}_${1}
            return
        fi
    done
    die "Usage error: Unknown phase '${1}'"
}

ebuild_main()
{
    if ! [[ -e /proc/self ]] && [[ "$(uname -s)" == Linux ]] ; then
        ebuild_notice "warning" "/proc appears to be unmounted or unreadable."
        ebuild_notice "warning" "This will cause problems."
    fi

    # this is fatal in builtin_init, but warn early for good measure
    if [[ -z "${PALUDIS_TMPDIR}" ]] ; then
        ebuild_notice "warning" "PALUDIS_TMPDIR unset or empty."
    elif ! cd "${PALUDIS_TMPDIR}" ; then
        ebuild_notice "warning" "Could not change directory to ${PALUDIS_TMPDIR}."
    fi

    local action
    export EBUILD="${1}"
    shift

    ebuild_notice "debug" "Using ebuild '${EBUILD}', EAPI before source is '${EAPI}'"

    if [[ ${#@} -ge 2 ]] ; then
        ebuild_section "Running ebuild phases $@ as $(id -un ):$(id -gn )..."
    elif [[ ${1} != variable ]] && [[ ${1} != metadata ]] && \
            [[ ${1} != pretend ]] && [[ ${1} != bad_options ]] ; then
        ebuild_section "Running ebuild phase $@ as $(id -un ):$(id -gn )..."
    fi

    for action in $@ ; do
        ebuild_load_module $(paludis_phase_to_function_name "${action}")
    done

    if [[ $1 == metadata ]] || [[ $1 == variable ]] || [[ $1 == pretend ]] || \
            [[ $1 == bad_options ]] ; then
        export EBUILD_PHASE="${1}"
        perform_hook ebuild_${action}_pre
        if [[ $1 != variable ]] || [[ -n "${EBUILD}" ]] ; then
            for f in cut tr date ; do
                eval "export ebuild_real_${f}=\"$(which $f )\""
                eval "${f}() { ebuild_notice qa 'global scope ${f}' ; $(which $f ) \"\$@\" ; }"
            done
            for f in locked_pipe_command ; do
                eval "${f}() { $(which $f ) \"\$@\" ; }"
            done
            PATH="" ebuild_load_ebuild "${EBUILD}"
        fi
        if ! ${PALUDIS_F_FUNCTION_PREFIX:-ebuild_f}_${1} ; then
            perform_hook ebuild_${action}_fail
            die "${1} failed"
        fi
        perform_hook ebuild_${action}_post
    else
        ebuild_load_environment
        for action in $@ ; do
            export EBUILD_PHASE="${action}"
            perform_hook ebuild_${action}_pre
            if ! ${PALUDIS_F_FUNCTION_PREFIX:-ebuild_f}_${action} ; then
                perform_hook ebuild_${action}_fail
                die "${action} failed"
            fi
            perform_hook ebuild_${action}_post
        done
    fi

    if [[ ${#@} -ge 2 ]] ; then
        ebuild_section "Completed ebuild phases $@"
    elif [[ ${1} != variable ]] && [[ ${1} != metadata ]] && \
            [[ ${1} != pretend ]] && [[ ${1} != bad_options ]] ; then
        ebuild_section "Completed ebuild phase $@"
    fi
}

ebuild_main "$@"