source: trunk/build_support/move-if-change @ 591

Last change on this file since 591 was 569, checked in by Peter Johansson, 14 years ago

NOTE: may cause file name clash. Adding file
subversion_info.h'. Previously make' generated this file, and thus
you may experience a file name clash. Please remove subversion_info.h
prior updating.

Moved implementation of subversion_info to source file in order to
avoid re-compilations not needed. Using script move-if-change to
create source file.

  • Property svn:executable set to *
File size: 384 bytes
Line 
1#!/bin/sh
2# Like mv $1 $2, but if the files are the same, just delete $1.
3# Status is zero if successful, nonzero otherwise.
4
5usage="$0: usage: $0 SOURCE DEST"
6
7case $# in
82) ;;
9*) echo "$usage" >&2; exit 1;;
10esac
11
12for arg in "$1" "$2"; do
13  case $arg in
14   -*) echo "$usage" >&2; exit 1;;
15  esac
16done
17
18if test -r "$2" && cmp -s "$1" "$2"; then
19  rm -f "$1"
20else
21  mv -f "$1" "$2"
22fi
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