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package DependencyEditor;
# ************************************************************
# Description : Edits existing dependencies.
# Author : Chad Elliott
# Create Date : 2/10/2002
# ************************************************************
# ************************************************************
# Pragmas
# ************************************************************
use strict;
use FileHandle;
use DependencyGenerator;
# ************************************************************
# Subroutine Section
# ************************************************************
sub new {
return bless {}, $_[0];
}
sub process {
my($self, $output, $type, $noinline, $macros,
$ipaths, $replace, $exclude, $files) = @_;
## Back up the original file and receive the contents
my $contents;
if (-s $output) {
$contents = [];
if (!$self->backup($output, $contents)) {
print STDERR "ERROR: Unable to backup $output\n";
return 1;
}
}
## Write out the contents of the file
my $fh = new FileHandle();
if (open($fh, ">$output")) {
if (defined $contents) {
foreach my $line (@$contents) {
print $fh $line;
}
}
## Write out the new dependency marker
print $fh "# DO NOT DELETE THIS LINE -- depgen.pl uses it.\n",
"# DO NOT PUT ANYTHING AFTER THIS LINE, IT WILL GO AWAY.\n\n";
## Generate the new dependencies and write them to the file
my $dep = new DependencyGenerator($macros, $ipaths, $replace,
$type, $noinline, $exclude);
## Sort the files so the dependencies are reproducible
foreach my $file (sort @$files) {
## In some situations we may be passed a directory as part of an
## option. If it is an unknown option, we may think the directory
## needs to be part of the dependencies when it should not.
print $fh $dep->process($file), "\n" if (!-d $file);
}
## Write out the end of the block warning
print $fh "# IF YOU PUT ANYTHING HERE IT WILL GO AWAY\n";
close($fh);
}
else {
print STDERR "ERROR: Unable to open $output for output\n";
return 1;
}
return 0;
}
sub backup {
my($self, $source, $contents) = @_;
my $status;
my $fh = new FileHandle();
my $backup = "$source.bak";
## Back up the file. While doing so, keep track of the contents of the
## file and keep everything except the old dependencies.
if (open($fh, $source)) {
my $oh = new FileHandle();
if (open($oh, ">$backup")) {
my $record = 1;
$status = 1;
while(<$fh>) {
print $oh $_;
if ($record) {
if (index($_, 'DO NOT DELETE') >= 0) {
$record = undef;
}
else {
push(@$contents, $_);
}
}
}
close($oh);
## Set file permission so that the backup has the same permissions
## as the original file.
my @buf = stat($source);
if (defined $buf[8] && defined $buf[9]) {
utime($buf[8], $buf[9], $backup);
}
}
close($fh);
}
return $status;
}
1;
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