1cdf0e10cSrcweir: 2cdf0e10cSrcweir eval 'exec perl -S $0 ${1+"$@"}' 3cdf0e10cSrcweir if 0; 4*7e90fac2SAndrew Rist#************************************************************** 5*7e90fac2SAndrew Rist# 6*7e90fac2SAndrew Rist# Licensed to the Apache Software Foundation (ASF) under one 7*7e90fac2SAndrew Rist# or more contributor license agreements. See the NOTICE file 8*7e90fac2SAndrew Rist# distributed with this work for additional information 9*7e90fac2SAndrew Rist# regarding copyright ownership. The ASF licenses this file 10*7e90fac2SAndrew Rist# to you under the Apache License, Version 2.0 (the 11*7e90fac2SAndrew Rist# "License"); you may not use this file except in compliance 12*7e90fac2SAndrew Rist# with the License. You may obtain a copy of the License at 13*7e90fac2SAndrew Rist# 14*7e90fac2SAndrew Rist# http://www.apache.org/licenses/LICENSE-2.0 15*7e90fac2SAndrew Rist# 16*7e90fac2SAndrew Rist# Unless required by applicable law or agreed to in writing, 17*7e90fac2SAndrew Rist# software distributed under the License is distributed on an 18*7e90fac2SAndrew Rist# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 19*7e90fac2SAndrew Rist# KIND, either express or implied. See the License for the 20*7e90fac2SAndrew Rist# specific language governing permissions and limitations 21*7e90fac2SAndrew Rist# under the License. 22*7e90fac2SAndrew Rist# 23*7e90fac2SAndrew Rist#************************************************************** 24*7e90fac2SAndrew Rist 25*7e90fac2SAndrew Rist 26cdf0e10cSrcweir 27cdf0e10cSrcweir 28cdf0e10cSrcweirmy ( $srcfile, $destfile ) = @ARGV; 29cdf0e10cSrcweirmy ( @srclines, @destlines ); 30cdf0e10cSrcweirmy $dest_existing = 0; 31cdf0e10cSrcweir@destlines = (); 32cdf0e10cSrcweir 33cdf0e10cSrcweirusage() if ( ! defined $srcfile || ! defined $destfile); 34cdf0e10cSrcweir 35cdf0e10cSrcweiropen(SRCFILE, "$srcfile") or die "ERROR: Can't open $srcfile\n"; 36cdf0e10cSrcweir@srclines = <SRCFILE>; 37cdf0e10cSrcweirclose SRCFILE; 38cdf0e10cSrcweir 39cdf0e10cSrcweirif ( -f $destfile ) { 40cdf0e10cSrcweir open(DESTFILE, "$destfile") or die "ERROR: Can't open $destfile\n"; 41cdf0e10cSrcweir @destlines = <DESTFILE>; 42cdf0e10cSrcweir close DESTFILE; 43cdf0e10cSrcweir $dest_existing = 1; 44cdf0e10cSrcweir} 45cdf0e10cSrcweir 46cdf0e10cSrcweirif ( ! check_if_lists_equal(\@srclines, \@destlines) ) { 47cdf0e10cSrcweir print STDERR "Updating \"$destfile\".\n"; 48cdf0e10cSrcweir unlink "$destfile" or die "ERROR: Can't remove old $destfile\n" if ( $dest_existing ); 49cdf0e10cSrcweir rename "$srcfile", "$destfile" or die "ERROR: Can't rename $srcfile to $destfile\n"; 50cdf0e10cSrcweir} else { 51cdf0e10cSrcweir print STDERR "\"$destfile\" unchanged.\n"; 52cdf0e10cSrcweir} 53cdf0e10cSrcweir 54cdf0e10cSrcweirsub check_if_lists_equal 55cdf0e10cSrcweir{ 56cdf0e10cSrcweir my ( $srclist_ref, $destlist_ref ) = @_; 57cdf0e10cSrcweir my @srclist = @{ $srclist_ref }; 58cdf0e10cSrcweir my @destlist = @{ $destlist_ref }; 59cdf0e10cSrcweir return 0 if ( $#srclist != $#destlist ); 60cdf0e10cSrcweir for ( my $i = 0; $i < $#srclist; $i++ ) { 61cdf0e10cSrcweir return 0 if ( $srclist[$i] ne $destlist[$i]); 62cdf0e10cSrcweir } 63cdf0e10cSrcweir return 1; 64cdf0e10cSrcweir} 65cdf0e10cSrcweir 66cdf0e10cSrcweirsub usage 67cdf0e10cSrcweir{ 68cdf0e10cSrcweir print STDERR "Usage: diffmv sourcefile destfile\n"; 69cdf0e10cSrcweir print STDERR "Do move diffing file only\n"; 70cdf0e10cSrcweir exit 1; 71cdf0e10cSrcweir} 72cdf0e10cSrcweir 73