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#!/bin/bash
#
# util.sh - general utility functions
#
# Copyright (c) 2006-2018 Pacman Development Team <pacman-dev@archlinux.org>
# Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.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_UTIL_SH" ]] && return
LIBMAKEPKG_UTIL_UTIL_SH=1
##
# usage : in_array( $needle, $haystack )
# return : 0 - found
# 1 - not found
##
in_array() {
local needle=$1; shift
local item
for item in "$@"; do
[[ $item = "$needle" ]] && return 0 # Found
done
return 1 # Not Found
}
# tests if a variable is an array
is_array() {
local v=$1
local ret=1
# this function requires extglob - save current status to restore later
local shellopts=$(shopt -p extglob)
shopt -s extglob
if [[ $(declare -p "$v") == declare\ -*([[:alnum:]])a*([[:alnum:]])\ * ]]; then
ret=0
fi
eval "$shellopts"
return $ret
}
# Canonicalize a directory path if it exists
canonicalize_path() {
local path="$1";
if [[ -d $path ]]; then
(
cd_safe "$path"
pwd -P
)
else
printf "%s\n" "$path"
fi
}
dir_is_empty() {
(
shopt -s dotglob nullglob
files=("$1"/*)
(( ${#files} == 0 ))
)
}
cd_safe() {
if ! cd "$1"; then
error "$(gettext "Failed to change to directory %s")" "$1"
plain "$(gettext "Aborting...")"
exit 1
fi
}
# Try to create directory if one does not yet exist. Fails if the directory
# exists but has no write permissions, or if there is an existing file with
# the same name.
ensure_writable_dir() {
local dirtype="$1" dirpath="$2"
if ! mkdir -p "$dirpath" 2>/dev/null; then
if [[ -d $dirpath && ! -w $dirpath ]]; then
error "$(gettext "You do not have write permission for the directory \$%s (%s).")" "$dirtype" "$dirpath"
else
error "$(gettext "Failed to create the directory \$%s (%s).")" "$dirtype" "$dirpath"
fi
return 1
fi
return 0
}
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