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authorPaul Eggert2011-01-07 12:42:11 -0800
committerPaul Eggert2011-01-07 12:42:11 -0800
commit2b3f5bc80a2b8a7496a5d87cc98ffcce44e7b32e (patch)
tree0f8e136e47266b4bc4fa38ce543686edf4440f8e /move-if-change
parentf56e0e7a85978026b611bc8f28bdb91d7f8130d4 (diff)
downloademacs-2b3f5bc80a2b8a7496a5d87cc98ffcce44e7b32e.tar.gz
emacs-2b3f5bc80a2b8a7496a5d87cc98ffcce44e7b32e.zip
* install-sh, mkinstalldirs, move-if-change: Update from master
Diffstat (limited to 'move-if-change')
-rwxr-xr-xmove-if-change86
1 files changed, 74 insertions, 12 deletions
diff --git a/move-if-change b/move-if-change
index ee9e355e3e6..a891ca51f0c 100755
--- a/move-if-change
+++ b/move-if-change
@@ -1,15 +1,77 @@
1#!/bin/sh 1#!/bin/sh
2if 2# Like mv $1 $2, but if the files are the same, just delete $1.
3test -r $2 3# Status is zero if successful, nonzero otherwise.
4then 4
5if 5VERSION='2007-09-28 23:10'; # UTC
6cmp $1 $2 > /dev/null 6# The definition above must lie within the first 8 lines in order
7then 7# for the Emacs time-stamp write hook (at end) to update it.
8echo $2 is unchanged 8# If you change this file with Emacs, please let the write hook
9rm -f $1 9# do its job. Otherwise, update this string manually.
10
11# Copyright (C) 2002-2007, 2009-2011 Free Software Foundation, Inc.
12
13# This program is free software: you can redistribute it and/or modify
14# it under the terms of the GNU General Public License as published by
15# the Free Software Foundation, either version 3 of the License, or
16# (at your option) any later version.
17
18# This program is distributed in the hope that it will be useful,
19# but WITHOUT ANY WARRANTY; without even the implied warranty of
20# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21# GNU General Public License for more details.
22
23# You should have received a copy of the GNU General Public License
24# along with this program. If not, see <http://www.gnu.org/licenses/>.
25
26usage="usage: $0 SOURCE DEST"
27
28help="$usage
29 or: $0 OPTION
30If SOURCE is different than DEST, then move it to DEST; else remove SOURCE.
31
32 --help display this help and exit
33 --version output version information and exit
34
35Report bugs to <bug-gnulib@gnu.org>."
36
37version=`expr "$VERSION" : '\([^ ]*\)'`
38version="move-if-change (gnulib) $version
39Copyright (C) 2007 Free Software Foundation, Inc.
40License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
41This is free software: you are free to change and redistribute it.
42There is NO WARRANTY, to the extent permitted by law."
43
44
45for arg
46do
47 case $arg in
48 --help | --hel | --he | --h)
49 exec echo "$help" ;;
50 --version | --versio | --versi | --vers | --ver | --ve | --v)
51 exec echo "$version" ;;
52 --)
53 shift
54 break ;;
55 -*)
56 echo "$0: invalid option: $arg" >&2
57 exit 1 ;;
58 *)
59 break ;;
60 esac
61done
62
63test $# = 2 || { echo "$0: $usage" >&2; exit 1; }
64
65if test -r "$2" && cmp -s -- "$1" "$2"; then
66 rm -f -- "$1"
10else 67else
11mv -f $1 $2 68 mv -f -- "$1" "$2"
12fi
13else
14mv -f $1 $2
15fi 69fi
70
71## Local Variables:
72## eval: (add-hook 'write-file-hooks 'time-stamp)
73## time-stamp-start: "VERSION='"
74## time-stamp-format: "%:y-%02m-%02d %02H:%02M"
75## time-stamp-time-zone: "UTC"
76## time-stamp-end: "'; # UTC"
77## End: