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|
:
eval 'exec perl -S $0 ${1+"$@"}'
if 0;
#**************************************************************
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
#**************************************************************
my ( $srcfile, $destfile ) = @ARGV;
my ( @srclines, @destlines );
my $dest_existing = 0;
@destlines = ();
usage() if ( ! defined $srcfile || ! defined $destfile);
open(SRCFILE, "$srcfile") or die "ERROR: Can't open $srcfile\n";
@srclines = <SRCFILE>;
close SRCFILE;
if ( -f $destfile ) {
open(DESTFILE, "$destfile") or die "ERROR: Can't open $destfile\n";
@destlines = <DESTFILE>;
close DESTFILE;
$dest_existing = 1;
}
if ( ! check_if_lists_equal(\@srclines, \@destlines) ) {
print STDERR "Updating \"$destfile\".\n";
unlink "$destfile" or die "ERROR: Can't remove old $destfile\n" if ( $dest_existing );
rename "$srcfile", "$destfile" or die "ERROR: Can't rename $srcfile to $destfile\n";
} else {
print STDERR "\"$destfile\" unchanged.\n";
}
sub check_if_lists_equal
{
my ( $srclist_ref, $destlist_ref ) = @_;
my @srclist = @{ $srclist_ref };
my @destlist = @{ $destlist_ref };
return 0 if ( $#srclist != $#destlist );
for ( my $i = 0; $i < $#srclist; $i++ ) {
return 0 if ( $srclist[$i] ne $destlist[$i]);
}
return 1;
}
sub usage
{
print STDERR "Usage: diffmv sourcefile destfile\n";
print STDERR "Do move diffing file only\n";
exit 1;
}
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