summaryrefslogtreecommitdiff
path: root/src/lib/conf.sh
blob: f96af26770185ff5892078e5f5362057eb62dc54 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
#!/bin/bash # non-executable, but put this there as a hint to text editors
# This may be included with or without `set -euE`

#   Copyright (c) 2012-2013 by Luke Shumaker <lukeshu@sbcglobal.net>
#
#   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 3 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/>.

LIBREUSER="${SUDO_USER:-$USER}"
if [[ $LIBREUSER == $USER ]]; then
	LIBREHOME=$HOME
else
	LIBREHOME="$(eval echo ~$LIBREUSER)"
fi
if [[ -z ${XDG_CONFIG_HOME:-} ]]; then
	export XDG_CONFIG_HOME="${LIBREHOME}/.config"
fi
if [[ -z ${XDG_CACHE_HOME:-} ]]; then
	export XDG_CACHE_HOME="${LIBREHOME}/.cache"
fi

# Generic functions ############################################################

# Usage: list_files $slug
# Lists the configuration files to be considered for $slug.
# Later files should take precedence over earlier files.
list_files() {
	local slug=$1
	case $slug in
		abs)
			echo /etc/$slug.conf
			echo "$LIBREHOME/.$slug.conf"
			;;
		makepkg)
			if [[ ${MAKEPKG_CONF:-} != /etc/$slug.conf && -r ${MAKEPKG_CONF:-} ]]; then
				echo "$MAKEPKG_CONF"
			else
				echo /etc/$slug.conf
				echo "$LIBREHOME/.$slug.conf"
			fi
			;;
		libretools)
			echo /etc/$slug.conf
			echo "$XDG_CONFIG_HOME/libretools/$slug.conf"
			;;
		*)
			echo /etc/libretools.d/$slug.conf
			echo "$XDG_CONFIG_HOME/libretools/$slug.conf"
			;;
	esac
}

# Usage: list_envvars $slug
# Lists the environmental variables that take precidence over the configuration
# files for $slug.
list_envvars() {
	local slug=$1
	case $slug in
		makepkg)
			printf '%s\n' \
				PKGDEST SRCDEST SRCPKGDEST LOGDEST \
				BUILDDIR \
				PKGEXT SRCEXT \
				GPGKEY PACKAGER
			;;
		*) :;;
	esac
}

# Usage: load_files $slug
# Loads the configuration files for $slug in the proper order.
load_files() {
	local slug=$1
	local var
	local file

	# Save the existing versions at _VARNAME
	for var in $(list_envvars $slug); do
		[[ -n ${!var:-} ]] && eval "_$var=\${$var}"
	done

	# Load the files
	for file in $(list_files $slug); do
		if [[ -r $file ]]; then
			. "$file" || return 1
		fi
	done

	# Restore the _SAVED versions
	for var in $(list_envvars $slug); do
		eval "$var=\${_$var:-\${$var:-}}"
	done
}

# Usage: check_vars $slug VAR1 VAR2...
# Check whether the variables listed are properly set.
# If not, it prints a message saying to set them in the configuration file(s)
# for $slug.
check_vars() {
	local slug=$1; shift

	local ret=0

	local VAR
	for VAR in "$@"; do
		if [[ -z ${!VAR:-} ]]; then
			type print &>/dev/null || . libremessages
			if [[ $(list_files $slug|wc -l) -gt 1 ]]; then
				print "Configure '%s' in one of:" "$VAR"
				list_files $slug | sed 's/./  -> &/'
			else
				print "Configure '%s' in '%s'" "$VAR" "$(list_files $slug)"
			fi
			ret=1
		fi
	done >&2

	if [[ $ret != 0 ]]; then
		return 1
	fi
}

# makepkg configuration ########################################################

# Usage: get_conf_makepkg <var_name> <default_value>
get_conf_makepkg() (
	set +euE
	local setting=$1
	local default=$2
	load_files makepkg
	printf '%s\n' "${!setting:-${default}}"
)

set_conf_makepkg() {
	local key=$1
	local val=$2
	local file
	for file in $(list_files makepkg|tac); do
		if [[ -w $file ]]; then
			sed -i "/^\s*$key=/d" "$file"
			printf '%s=%q\n' "$key" "$val" >> "$file"
			return 0
		fi
	done
	return 1
}

# PKGBUILD (not configuration, per se) #########################################

unset_PKGBUILD() {
	# This routine is based primarily off of the PKGBUILD(5) man-page,
	# version 4.1.2, dated 2013-06-18.

	# From the "OPTIONS AND DIRECTIVES" section (in order of mention)
	unset -v pkgname pkgver
	unset -f pkgver
	unset -v pkgrel pkgdesc epoch url license install changelog source
	unset -v noextract md5sums sha{1,256,384,512}sums groups arch backup
	unset -v depends makedepends checkdepends optdepends conflicts provides
	unset -v replaces options

	# From the "PACKAGING FUNCTIONS" section (in order of mention)
	unset -f package prepare build check

	# From the "PACKAGE SPLITTING" section
	unset -f $(declare -f|sed -n 's/^\(package_\S*\) ()\s*$/\1/p')
	unset -v pkgbase

	# These are used by the `librefetch` program
	unset -v mksource mknoextract mkmd5sums mksha{1,256,384,512}sums
	unset -v mkdepends
	unset -f mksource
}

load_PKGBUILD() {
	local file=${1:-./PKGBUILD}
	unset_PKGBUILD
	CARCH="$(get_conf_makepkg CARCH "`uname -m`")"
	. "$file"
}