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path: root/scripts/libmakepkg/util/pkgbuild.sh.in
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#!/bin/bash
#
#   pkgbuild.sh - functions to extract information from PKGBUILD files
#
#   Copyright (c) 2009-2016 Pacman Development Team <pacman-dev@archlinux.org>
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#
#   This program 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, see <http://www.gnu.org/licenses/>.
#

[[ -n "$LIBMAKEPKG_UTIL_PKGBUILD_SH" ]] && return
LIBMAKEPKG_UTIL_PKGBUILD_SH=1


have_function() {
        declare -f "$1" >/dev/null
}

grep_function() {
        { declare -f "$1" || declare -f package; } 2>/dev/null | grep -E "$2"
}

array_build() {
        local dest=$1 src=$2 i keys values

        # it's an error to try to copy a value which doesn't exist.
        declare -p "$2" &>/dev/null || return 1

        # Build an array of the indicies of the source array.
        eval "keys=(\"\${!$2[@]}\")"

        # Clear the destination array
        eval "$dest=()"

        # Read values indirectly via their index. This approach gives us support
        # for associative arrays, sparse arrays, and empty strings as elements.
        for i in "${keys[@]}"; do
                values+=("printf -v '$dest[$i]' %s \"\${$src[$i]}\";")
        done

        eval "${values[*]}"
}

extract_global_variable() {
        # $1: variable name
        # $2: multivalued
        # $3: name of output var

        local attr=$1 isarray=$2 outputvar=$3 ref

        if (( isarray )); then
                array_build ref "$attr"
                [[ ${ref[@]} ]] && array_build "$outputvar" "$attr"
        else
                [[ ${!attr} ]] && printf -v "$outputvar" %s "${!attr}"
        fi
}

extract_function_variable() {
        # $1: function name
        # $2: variable name
        # $3: multivalued
        # $4: name of output var

        local funcname=$1 attr=$2 isarray=$3 outputvar=$4 attr_regex= decl= r=1

        if (( isarray )); then
                printf -v attr_regex '^[[:space:]]* %s\+?=\(' "$2"
        else
                printf -v attr_regex '^[[:space:]]* %s\+?=[^(]' "$2"
        fi

        while read -r; do
                # strip leading whitespace and any usage of declare
                decl=${REPLY##*([[:space:]])}
                eval "${decl/#$attr/$outputvar}"

                # entering this loop at all means we found a match, so notify the caller.
                r=0
        done < <(grep_function "$funcname" "$attr_regex")

        return $r
}

get_pkgbuild_attribute() {
        # $1: package name
        # $2: attribute name
        # $3: multivalued
        # $4: name of output var

        local pkgname=$1 attrname=$2 isarray=$3 outputvar=$4

        printf -v "$outputvar" %s ''

        if [[ $pkgname ]]; then
                extract_global_variable "$attrname" "$isarray" "$outputvar"
                extract_function_variable "package_$pkgname" "$attrname" "$isarray" "$outputvar"
        else
                extract_global_variable "$attrname" "$isarray" "$outputvar"
        fi
}

##
#  usage : get_full_version()
# return : full version spec, including epoch (if necessary), pkgver, pkgrel
##
get_full_version() {
        if (( epoch > 0 )); then
                printf "%s\n" "$epoch:$pkgver-$pkgrel"
        else
                printf "%s\n" "$pkgver-$pkgrel"
        fi
}

##
#  usage : get_pkg_arch( [$pkgname] )
# return : architecture of the package
##
get_pkg_arch() {
        if [[ -z $1 ]]; then
                if [[ $arch = "any" ]]; then
                        printf "%s\n" "any"
                else
                        printf "%s\n" "$CARCH"
                fi
        else
                local arch_override
                get_pkgbuild_attribute "$1" arch 1 arch_override
                (( ${#arch_override[@]} == 0 )) && arch_override=("${arch[@]}")
                if [[ $arch_override = "any" ]]; then
                        printf "%s\n" "any"
                else
                        printf "%s\n" "$CARCH"
                fi
        fi
}

print_all_package_names() {
        local version=$(get_full_version)
        local architecture pkg opts a
        for pkg in ${pkgname[@]}; do
                get_pkgbuild_attribute "$pkg" 'arch' 1 architecture
                get_pkgbuild_attribute "$pkg" 'options' 1 opts
                for a in ${architecture[@]}; do
                        printf "%s-%s-%s\n" "$pkg" "$version" "$a"
                        if in_opt_array "debug" ${opts[@]} && in_opt_array "strip" ${opts[@]}; then
                                printf "%s-%s-%s-%s\n" "$pkg" "@DEBUGSUFFIX@" "$version" "$a"
                        fi
                done
        done
}

get_all_sources() {
        local aggregate l a

        if array_build l 'source'; then
                aggregate+=("${l[@]}")
        fi

        for a in "${arch[@]}"; do
                if array_build l "source_$a"; then
                        aggregate+=("${l[@]}")
                fi
        done

        array_build "$1" "aggregate"
}

get_all_sources_for_arch() {
        local aggregate l

        if array_build l 'source'; then
                aggregate+=("${l[@]}")
        fi

        if array_build l "source_$CARCH"; then
                aggregate+=("${l[@]}")
        fi

        array_build "$1" "aggregate"
}

get_integlist() {
        local integ
        local integlist=()

        for integ in "${known_hash_algos[@]}"; do
                local sumname="${integ}sums[@]"
                if [[ -n ${!sumname} ]]; then
                        integlist+=("$integ")
                fi
        done

        if (( ${#integlist[@]} > 0 )); then
                printf "%s\n" "${integlist[@]}"
        else
                printf "%s\n" "${INTEGRITY_CHECK[@]}"
        fi
}