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#!/usr/bin/perl
#
# Script to create Makefile-style dependencies.
#
# Usage: perl [-s path-separator] [-o obj-ext] mkdep.pl dir... > deps
#
use File::Spec;
use File::Basename;
use Fcntl;
$barrier = "#-- Everything below is generated by mkdep.pl - do not edit --#\n";
#
# Scan files for dependencies
#
sub scandeps($) {
my($file) = @_;
my($line, $nf);
my(@xdeps) = ();
my(@mdeps) = ();
sysopen(FILE, $file, O_RDONLY)
or return; # If not openable, assume generated
while ( defined($line = <FILE>) ) {
chomp $line;
$line =~ s:/\*.*\*/::g;
$line =~ s://.*$::;
if ( $line =~ /^\s*\#\s*include\s+\"(.*)\"\s*$/ ) {
$nf = $1;
push(@mdeps, $nf);
push(@xdeps, $nf) unless ( defined($deps{$nf}) );
}
}
close(FILE);
$deps{$file} = [@mdeps];
foreach $file ( @xdeps ) {
scandeps($file);
}
}
# %deps contains direct dependencies. This subroutine resolves
# indirect dependencies that result.
sub alldeps($) {
my($file) = @_;
my(%adeps);
my($dep,$idep);
foreach $dep ( @{$deps{$file}} ) {
$adeps{$dep} = 1;
foreach $idep ( alldeps($dep) ) {
$adeps{$idep} = 1;
}
}
return keys(%adeps);
}
# This converts a filename from host syntax to target syntax
# This almost certainly works only on relative filenames...
sub convert_file($$) {
my($file,$sep) = @_;
my(@fspec) = (basename($file));
while ( ($file = dirname($file)) ne File::Spec->curdir() &&
$file ne File::Spec->rootdir() ) {
unshift(@fspec, basename($file));
}
return join($sep, @fspec);
}
#
# Insert dependencies into a Makefile
#
sub insert_deps($) {
my($file) = @_;
$nexttemp++; # Unique serial number for each temp file
my($tmp) = File::Spec->catfile(dirname($file), 'tmp.'.$nexttemp);
sysopen(IN, $file, O_RDONLY)
or die "$0: Cannot open input: $file\n";
sysopen(OUT, $tmp, O_WRONLY|O_CREAT|O_TRUNC, 0666)
or die "$0: Cannot open output: $tmp\n";
my($line,$parm,$val);
my($obj) = '.o'; # Defaults
my($sep) = '/';
my($maxline) = 78; # Seems like a reasonable default
while ( defined($line = <IN>) ) {
if ( $line =~ /^\s*\#\s*@([a-z0-9-]+):\s*\"([^\"]*)\"/ ) {
$parm = $1; $val = $2;
if ( $parm eq 'object-ending' ) {
$obj = $val;
} elsif ( $parm eq 'path-separator' ) {
$sep = $val;
} elsif ( $parm eq 'line-width' ) {
$maxline = $val+0;
}
} elsif ( $line eq $barrier ) {
last; # Stop reading input at barrier line
}
print OUT $line;
}
close(IN);
my $dfile, $ofile, $str, $sl, $len;
my @deps, $dep;
print OUT $barrier;
foreach $dfile ( sort(keys(%deps)) ) {
if ( $dfile =~ /\.[Cc]$/ ) {
$ofile = $dfile; $ofile =~ s/\.[Cc]$//;
$str = convert_file($ofile,$sep).$obj.':';
$len = length($str);
print OUT $str;
foreach $dep ($dfile, alldeps($dfile)) {
$str = convert_file($dep,$sep);
$sl = length($str)+1;
if ( $len+$sl > $maxline-2 ) {
print OUT " \\\n ", $str;
$len = $sl;
} else {
print OUT ' ', $str;
$len += $sl;
}
}
print OUT "\n";
}
}
close(OUT);
(unlink($file) && rename($tmp, $file))
or die "$0: Failed to change $tmp -> $file\n";
}
#
# Main program
#
%deps = ();
@files = ();
@mkfiles = ();
$mkmode = 0;
while ( defined($arg = shift(@ARGV)) ) {
if ( $arg eq '-m' ) {
$arg = shift(@ARGV);
push(@mkfiles, $arg);
} elsif ( $arg eq '-M' ) {
$mkmode = 1; # Futher filenames are output Makefile names
} elsif ( $arg eq '--' && $mkmode ) {
$mkmode = 0;
} elsif ( $arg =~ /^-/ ) {
die "Unknown option: $arg\n";
} else {
if ( $mkmode ) {
push(@mkfiles, $arg);
} else {
push(@files, $arg);
}
}
}
foreach $dir ( @files ) {
opendir(DIR, $dir) or die "$0: Cannot open directory: $dir";
while ( $file = readdir(DIR) ) {
$path = ($dir eq File::Spec->curdir())
? $file : File::Spec->catfile($dir,$file);
if ( $file =~ /\.[Cc]$/ ) {
scandeps($path);
}
}
closedir(DIR);
}
foreach $mkfile ( @mkfiles ) {
insert_deps($mkfile);
}
|
