From 83b734a103016f08e63e03e1e803c327584e3721 Mon Sep 17 00:00:00 2001
From: Allan McRae <allan@archlinux.org>
Date: Tue, 12 May 2015 22:10:24 +1000
Subject: libmakepkg: move functions for extracting pkgbuild attributes
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>
---
scripts/libmakepkg/util/pkgbuild.sh | 111 ++++++++++++++++++++++++++++++++++++
1 file changed, 111 insertions(+)
create mode 100644 scripts/libmakepkg/util/pkgbuild.sh
(limited to 'scripts/libmakepkg/util')
diff --git a/scripts/libmakepkg/util/pkgbuild.sh b/scripts/libmakepkg/util/pkgbuild.sh
new file mode 100644
index 00000000..2e97e4dc
--- /dev/null
+++ b/scripts/libmakepkg/util/pkgbuild.sh
@@ -0,0 +1,111 @@
+#!/bin/bash
+#
+# pkgbuild.sh - functions to extract information from PKGBUILD files
+#
+# Copyright (c) 2014-2015 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
+}
--
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