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https://github.com/moparisthebest/pacman
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83b734a103
Also rename some functions for clarity: funcgrep -> grep_function extract_global_var -> extract_global_variable extract_function_var -> extract_function_variable pkgbuild_get_attribute -> get_pkgbuild_attribute Signed-off-by: Allan McRae <allan@archlinux.org>
112 lines
2.9 KiB
Bash
112 lines
2.9 KiB
Bash
#!/bin/bash
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#
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# pkgbuild.sh - functions to extract information from PKGBUILD files
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#
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# Copyright (c) 2014-2015 Pacman Development Team <pacman-dev@archlinux.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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[ -n "$LIBMAKEPKG_UTIL_PKGBUILD_SH" ] && return
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LIBMAKEPKG_UTIL_PKGBUILD_SH=1
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have_function() {
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declare -f "$1" >/dev/null
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}
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grep_function() {
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{ declare -f "$1" || declare -f package; } 2>/dev/null | grep -E "$2"
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}
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array_build() {
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local dest=$1 src=$2 i keys values
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# it's an error to try to copy a value which doesn't exist.
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declare -p "$2" &>/dev/null || return 1
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# Build an array of the indicies of the source array.
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eval "keys=(\"\${!$2[@]}\")"
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# Clear the destination array
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eval "$dest=()"
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# Read values indirectly via their index. This approach gives us support
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# for associative arrays, sparse arrays, and empty strings as elements.
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for i in "${keys[@]}"; do
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values+=("printf -v '$dest[$i]' %s \"\${$src[$i]}\";")
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done
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eval "${values[*]}"
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}
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extract_global_variable() {
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# $1: variable name
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# $2: multivalued
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# $3: name of output var
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local attr=$1 isarray=$2 outputvar=$3 ref
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if (( isarray )); then
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array_build ref "$attr"
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[[ ${ref[@]} ]] && array_build "$outputvar" "$attr"
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else
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[[ ${!attr} ]] && printf -v "$outputvar" %s "${!attr}"
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fi
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}
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extract_function_variable() {
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# $1: function name
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# $2: variable name
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# $3: multivalued
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# $4: name of output var
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local funcname=$1 attr=$2 isarray=$3 outputvar=$4 attr_regex= decl= r=1
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if (( isarray )); then
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printf -v attr_regex '^[[:space:]]* %s\+?=\(' "$2"
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else
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printf -v attr_regex '^[[:space:]]* %s\+?=[^(]' "$2"
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fi
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while read -r; do
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# strip leading whitespace and any usage of declare
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decl=${REPLY##*([[:space:]])}
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eval "${decl/#$attr/$outputvar}"
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# entering this loop at all means we found a match, so notify the caller.
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r=0
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done < <(grep_function "$funcname" "$attr_regex")
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return $r
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}
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get_pkgbuild_attribute() {
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# $1: package name
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# $2: attribute name
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# $3: multivalued
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# $4: name of output var
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local pkgname=$1 attrname=$2 isarray=$3 outputvar=$4
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printf -v "$outputvar" %s ''
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if [[ $pkgname ]]; then
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extract_global_variable "$attrname" "$isarray" "$outputvar"
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extract_function_variable "package_$pkgname" "$attrname" "$isarray" "$outputvar"
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else
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extract_global_variable "$attrname" "$isarray" "$outputvar"
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fi
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}
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