blob: 99190ebcbef093bbadc45e511f51c29f3a8fc386 (
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
|
# -*-eselect-*- vim: ft=eselect
# Copyright 1999-2015 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
DESCRIPTION="Manage /usr/bin/unison versions"
MAINTAINER="ml@gentoo.org"
VERSION="0.3"
# find a list of unison symlink targets, best first
find_targets() {
local f
for f in "${EROOT}"/usr/bin/unison-[0-9]*; do
if [[ -f ${f} ]] ; then
echo "${f##*/unison-}"
fi
done | tac
}
# find version number of currently symlinked version
identify_target() {
local f
f="$(canonicalise "${EROOT}"/usr/bin/unison)"
echo "${f##*/unison-}"
}
# try to remove the unison symlink
remove_symlinks() {
rm -f "${EROOT}"/usr/bin/unison &>/dev/null
}
# set the unison symlink
set_symlinks() {
local target="${1}" targets
if is_number "${target}" && [[ ${target} -ge 1 ]] ; then
targets=( $(find_targets) )
target=${targets[target - 1]}
fi
if [[ -f "${EROOT}/usr/bin/unison-${target}" ]] ; then
remove_symlinks
ln -s "unison-${target}" "${EROOT}/usr/bin/unison" || \
die "Could not set ${target} /usr/bin/unison symlink"
else
die -q "Target \"${target}\" doesn't appear to be valid!"
fi
}
### show action ###
describe_show() {
echo "Show the current unison version"
}
do_show() {
[[ -z "${@}" ]] || die -q "Too many parameters"
write_list_start "Current unison verson:"
if [[ -L "${EROOT}/usr/bin/unison" ]] ; then
write_kv_list_entry "$(identify_target)" ""
elif [[ -e "${EROOT}/usr/bin/unison" ]] ; then
write_kv_list_entry "(not a symlink)" ""
else
write_kv_list_entry "(unset)" ""
fi
}
### list action ###
describe_list() {
echo "List available unison versions"
}
do_list() {
[[ $# -eq 0 ]] || die -q "Too many parameters"
local i targets current
targets=( $(find_targets ) )
current=$(identify_target)
for (( i = 0; i < ${#targets[@]}; i++ )); do
[[ ${targets[i]} = ${current} ]] \
&& targets[i]=$(highlight_marker "${targets[i]}")
done
write_list_start "Available unison versions:"
write_numbered_list -m "(none found)" "${targets[@]}"
}
### set action ###
describe_set() {
echo "Set a new unison version"
}
describe_set_options() {
echo "target : Target version number or index from 'list' action"
}
describe_set_parameters() {
echo "<target>"
}
do_set() {
if [[ -z "${1}" ]] ; then
die -q "You didn't give me a version number"
elif [[ -n "${2}" ]] ; then
die -q "Too many parameters"
elif [[ -L "${EROOT}/usr/bin/unison" ]] ; then
if ! remove_symlinks ; then
die -q "Can't remove existing version symlink"
elif ! set_symlinks "${1}" ; then
die -q "Can't set new version"
fi
elif [[ -e "${EROOT}/usr/bin/unison" ]] ; then
die -q "${EROOT}/usr/bin/unison seems to be from an old ebuild, please remove manually"
else
set_symlinks "${1}" || die -q "Can't set new version"
fi
}
### update action ###
describe_update() {
echo "Automatically update the unison version number"
}
describe_update_options() {
echo "--if-unset : Do not override currently selected version"
}
do_update() {
[[ -z "${1}" ]] || ( [[ -z "${2}" ]] && [[ "${1}" == "--if-unset" ]] ) || \
die -q "Usage error"
if [[ -L "${EROOT}/usr/bin/unison" ]] ; then
[[ ${1} == "--if-unset" ]] && return
remove_symlinks || die -q "Can't remove existing symlink"
fi
if [[ -e "${EROOT}/usr/bin/unison" ]] ; then
die -q "${EROOT}/usr/bin/unison seems to be from an old ebuild, please remove manually"
elif ! [[ -z $(find_targets ) ]] ; then
set_symlinks 1 || die -q "Can't set a new version"
fi
}
|
GitWeb