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
|
# Copyright 1999-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: savedconfig.eclass
# @MAINTAINER:
# base-system@gentoo.org
# @SUPPORTED_EAPIS: 7 8
# @BLURB: common API for saving/restoring complex configuration files
# @DESCRIPTION:
# It is not uncommon to come across a package which has a very fine
# grained level of configuration options that go way beyond what
# USE flags can properly describe. For this purpose, a common API
# of saving and restoring the configuration files was developed
# so users can modify these config files and the ebuild will take it
# into account as needed.
#
# Typically you can create your own configuration files quickly by
# doing:
#
# 1. Build the package with FEATURES=noclean USE=savedconfig.
#
# 2. Go into the build dir and edit the relevant configuration system
# (e.g. `make menuconfig` or `nano config-header.h`). You can look
# at the files in /etc/portage/savedconfig/ to see what files get
# loaded/restored.
#
# 3. Copy the modified configuration files out of the workdir and to
# the paths in /etc/portage/savedconfig/.
#
# 4. Emerge the package with just USE=savedconfig to get the custom
# build.
case ${EAPI} in
7|8) ;;
*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
esac
if [[ -z ${_SAVEDCONFIG_ECLASS} ]]; then
_SAVEDCONFIG_ECLASS=1
inherit portability
IUSE="savedconfig"
# @FUNCTION: save_config
# @USAGE: <config files to save>
# @DESCRIPTION:
# Use this function to save the package's configuration file into the
# right location. You may specify any number of configuration files,
# but just make sure you call save_config with all of them at the same
# time in order for things to work properly.
save_config() {
if [[ ${EBUILD_PHASE} != "install" ]]; then
die "Bad package! save_config only for use in src_install functions!"
fi
[[ $# -eq 0 ]] && die "Usage: save_config <files>"
local configfile="/etc/portage/savedconfig/${CATEGORY}/${PF}"
if [[ $# -eq 1 && -f $1 ]] ; then
# Just one file, so have the ${configfile} be that config file
dodir "${configfile%/*}"
cp "$@" "${ED}/${configfile}" || die "failed to save $*"
else
# A dir, or multiple files, so have the ${configfile} be a dir
# with all the saved stuff below it
dodir "${configfile}"
treecopy "$@" "${ED}/${configfile}" || die "failed to save $*"
fi
elog "Your configuration for ${CATEGORY}/${PF} has been saved in "
elog "\"${configfile}\" for your editing pleasure."
elog "You can edit these files by hand and remerge this package with"
elog "USE=savedconfig to customise the configuration."
elog "You can rename this file/directory to one of the following for"
elog "its configuration to apply to multiple versions:"
elog '${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/'
elog '[${CTARGET}|${CHOST}|""]/${CATEGORY}/[${PF}|${P}|${PN}]'
}
# @FUNCTION: restore_config
# @USAGE: <config files to restore>
# @DESCRIPTION:
# Restores the package's configuration file probably with user edits.
# You can restore a single file or a whole bunch, just make sure you call
# restore_config with all of the files to restore at the same time.
#
# Config files can be laid out as:
# @CODE
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CTARGET}/${CATEGORY}/${PF}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CHOST}/${CATEGORY}/${PF}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CATEGORY}/${PF}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CTARGET}/${CATEGORY}/${P}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CHOST}/${CATEGORY}/${P}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CATEGORY}/${P}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CTARGET}/${CATEGORY}/${PN}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CHOST}/${CATEGORY}/${PN}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CATEGORY}/${PN}
# @CODE
restore_config() {
case ${EBUILD_PHASE} in
unpack|compile|configure|prepare) ;;
*) die "Bad package! restore_config only for use in src_{unpack,compile,configure,prepare} functions!" ;;
esac
use savedconfig || return
local found check checked configfile
local base=${PORTAGE_CONFIGROOT%/}/etc/portage/savedconfig
for check in {${CATEGORY}/${PF},${CATEGORY}/${P},${CATEGORY}/${PN}}; do
configfile=${base}/${CTARGET:+"${CTARGET}/"}${check}
[[ -r ${configfile} ]] || configfile=${base}/${CHOST:+"${CHOST}/"}${check}
[[ -r ${configfile} ]] || configfile=${base}/${check}
[[ "${checked}" == *"${configfile} "* ]] && continue
einfo "Checking existence of \"${configfile}\" ..."
if [[ -r "${configfile}" ]] ; then
einfo "Found \"${configfile}\""
found=${configfile}
break
fi
checked+="${configfile} "
done
if [[ -f ${found} ]]; then
elog "Building using saved configfile \"${found}\""
if [ $# -gt 0 ]; then
cp -pPR "${found}" "$1" || die "Failed to restore ${found} to $1"
else
die "need to know the restoration filename"
fi
elif [[ -d ${found} ]]; then
elog "Building using saved config directory \"${found}\""
local dest=${PWD}
pushd "${found}" > /dev/null
treecopy . "${dest}" || die "Failed to restore ${found} to $1"
popd > /dev/null
else
ewarn "No saved config to restore - please remove USE=savedconfig or"
ewarn "provide a configuration file in ${PORTAGE_CONFIGROOT%/}/etc/portage/savedconfig/${CATEGORY}/${PN}"
ewarn "and ensure the build process has permission to access it."
ewarn "Your config file(s) will not be used this time."
fi
}
savedconfig_pkg_postinst() {
# If the user has USE=savedconfig, then chances are they
# are modifying these files, so keep them around. #396169
# This might lead to cruft build up, but the alternatives
# are worse :/.
if use savedconfig ; then
find "${EROOT}/etc/portage/savedconfig/${CATEGORY}/${PF}" \
-exec touch {} + 2>/dev/null
fi
}
fi
EXPORT_FUNCTIONS pkg_postinst
|
