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51ae82e4 JR |
1 | # displace.sh.in: diversion helpers for maintainer scripts |
2 | # | |
3 | # displace_link <prefix> <suffix> | |
4 | # | |
5 | # Ensures that the file <prefix><suffix> is properly diverted to | |
6 | # <prefix>.divert-orig<suffix> by this package, and becomes a | |
7 | # symbolic link to either <prefix>.divert<suffix> (default) or | |
8 | # <prefix>.divert-orig<suffix>. | |
9 | # | |
10 | # undisplace_unlink <prefix> <suffix> | |
11 | # | |
12 | # Undoes the action of displace_link <prefix> <suffix> specified | |
13 | # above. | |
14 | # | |
15 | # Version: 4.0 | |
16 | # | |
17 | # Copyright © 2008–2012 Tim Abbott <tabbott@mit.edu> and Anders | |
18 | # Kaseorg <andersk@mit.edu> | |
19 | # | |
20 | # Permission is hereby granted, free of charge, to any person | |
21 | # obtaining a copy of this software and associated documentation files | |
22 | # (the “Software”), to deal in the Software without restriction, | |
23 | # including without limitation the rights to use, copy, modify, merge, | |
24 | # publish, distribute, sublicense, and/or sell copies of the Software, | |
25 | # and to permit persons to whom the Software is furnished to do so, | |
26 | # subject to the following conditions: | |
27 | # | |
28 | # The above copyright notice and this permission notice shall be | |
29 | # included in all copies or substantial portions of the Software. | |
30 | # | |
31 | # THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, | |
32 | # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
33 | # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
34 | # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
35 | # BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
36 | # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
37 | # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
38 | # SOFTWARE. | |
39 | # | |
40 | ||
41 | package=#PACKAGE# | |
42 | ||
43 | ours=#DEB_DISPLACE_EXTENSION# | |
44 | theirs=#DEB_DISPLACE_EXTENSION#-orig | |
45 | ||
46 | displace_link_displace() | |
47 | { | |
48 | file=$1 | |
49 | ourfile=$2 | |
50 | theirfile=$3 | |
51 | if ! LC_ALL=C dpkg-divert --list "$package" | \ | |
52 | grep -xFq "diversion of $file to $theirfile by $package"; then | |
53 | dpkg-divert --divert "$theirfile" --rename --package "$package" --add "$file" | |
54 | fi | |
55 | } | |
56 | ||
57 | displace_link_symlink() | |
58 | { | |
59 | file=$1 | |
60 | ourfile=$2 | |
61 | theirfile=$3 | |
62 | if [ ! -L "$file" ] && [ ! -e "$file" ]; then | |
63 | ln -s "$(basename "$ourfile")" "$file" | |
64 | elif [ ! -L "$file" ] || \ | |
65 | [ "$(readlink "$file")" != "$(basename "$ourfile")" -a \ | |
66 | "$(readlink "$file")" != "$(basename "$theirfile")" ]; then | |
67 | echo "*** OMINOUS WARNING ***: $file is not linked to either $(basename "$ourfile") or $(basename "$theirfile")" >&2 | |
68 | fi | |
69 | } | |
70 | ||
71 | displace_link() | |
72 | { | |
73 | prefix=$1 | |
74 | suffix=$2 | |
75 | ||
76 | file=$prefix$suffix | |
77 | ourfile=$prefix$ours$suffix | |
78 | theirfile=$prefix$theirs$suffix | |
79 | displace_link_displace "$file" "$ourfile" "$theirfile" | |
80 | displace_link_symlink "$file" "$ourfile" "$theirfile" | |
81 | } | |
82 | ||
83 | displace_hide() | |
84 | { | |
85 | file=$1 | |
86 | ourfile="" | |
87 | theirfile=$2 | |
88 | displace_link_displace "$file" "$ourfile" "$theirfile" | |
89 | } | |
90 | ||
91 | undisplace_unlink_symlink() | |
92 | { | |
93 | file="$1" | |
94 | ourfile="$2" | |
95 | theirfile="$3" | |
96 | if [ ! -L "$file" ] || \ | |
97 | [ "$(readlink "$file")" != "$(basename "$ourfile")" -a \ | |
98 | "$(readlink "$file")" != "$(basename "$theirfile")" ]; then | |
99 | echo "*** OMINOUS WARNING ***: $file is not linked to either $(basename "$ourfile") or $(basename "$theirfile")" >&2 | |
100 | else | |
101 | rm -f "$file" | |
102 | fi | |
103 | } | |
104 | ||
105 | undisplace_unlink_displace() | |
106 | { | |
107 | file="$1" | |
108 | if [ ! -L "$file" ] && [ ! -e "$file" ]; then | |
109 | dpkg-divert --remove --rename --package "$package" "$file" | |
110 | else | |
111 | echo "Not removing diversion of $file by $package" >&2 | |
112 | fi | |
113 | } | |
114 | ||
115 | undisplace_unlink() | |
116 | { | |
117 | prefix=$1 | |
118 | suffix=$2 | |
119 | ||
120 | file=$prefix$suffix | |
121 | ourfile=$prefix$ours$suffix | |
122 | theirfile=$prefix$theirs$suffix | |
123 | ||
124 | undisplace_unlink_symlink "$file" "$ourfile" "$theirfile" | |
125 | undisplace_unlink_displace "$file" | |
126 | } | |
127 | ||
128 | undisplace_unhide() | |
129 | { | |
130 | file=$1 | |
131 | undisplace_unlink_displace "$file" | |
132 | } | |
133 | ||
134 | check_undisplace_unlink() | |
135 | { | |
136 | prefix=$1 | |
137 | suffix=$2 | |
138 | ||
139 | file=$prefix$suffix | |
140 | ourfile=$prefix$ours$suffix | |
141 | theirfile=$prefix$theirs$suffix | |
142 | ||
143 | if LC_ALL=C dpkg-divert --list "$package" | \ | |
144 | grep -xFq "diversion of $file to $theirfile by $package"; then | |
145 | undisplace_unlink "$prefix" "$suffix" | |
146 | fi | |
147 | } | |
148 | ||
149 | check_undisplace_unhide() | |
150 | { | |
151 | file=$1 | |
152 | hiddenfile=$2 | |
153 | if LC_ALL=C dpkg-divert --list "$package" | \ | |
154 | grep -xFq "diversion of $file to $hiddenfile by $package"; then | |
155 | undisplace_unhide "$file" | |
156 | fi | |
157 | } | |
158 | ||
159 | # End of divert.sh.in |