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877ca3bc80
my %foo; doesn't mean %foo is initialized to empty, need my %foo = (); or my %foo = undef; or similar for that.
204 lines
4.5 KiB
Perl
Executable File
204 lines
4.5 KiB
Perl
Executable File
#!/usr/bin/perl
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#
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# Script to create Makefile-style dependencies.
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#
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# Usage: perl mkdep.pl [-s path-separator] [-o obj-ext] dir... > deps
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#
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use File::Spec;
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use File::Basename;
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use Fcntl;
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$barrier = "#-- Everything below is generated by mkdep.pl - do not edit --#\n";
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#
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# Scan files for dependencies
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#
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sub scandeps($) {
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my($file) = @_;
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my($line, $nf);
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my(@xdeps) = ();
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my(@mdeps) = ();
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sysopen(FILE, $file, O_RDONLY)
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or return; # If not openable, assume generated
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while ( defined($line = <FILE>) ) {
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chomp $line;
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$line =~ s:/\*.*\*/::g;
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$line =~ s://.*$::;
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if ( $line =~ /^\s*\#\s*include\s+\"(.*)\"\s*$/ ) {
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$nf = $1;
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push(@mdeps, $nf);
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push(@xdeps, $nf) unless ( defined($deps{$nf}) );
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}
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}
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close(FILE);
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$deps{$file} = [@mdeps];
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foreach $file ( @xdeps ) {
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scandeps($file);
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}
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}
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# %deps contains direct dependencies. This subroutine resolves
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# indirect dependencies that result.
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sub alldeps($) {
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my($file) = @_;
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my(%adeps);
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my($dep,$idep);
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foreach $dep ( @{$deps{$file}} ) {
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$adeps{$dep} = 1;
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foreach $idep ( alldeps($dep) ) {
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$adeps{$idep} = 1;
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}
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}
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return sort(keys(%adeps));
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}
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# This converts a filename from host syntax to target syntax
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# This almost certainly works only on relative filenames...
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sub convert_file($$) {
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my($file,$sep) = @_;
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my(@fspec) = (basename($file));
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while ( ($file = dirname($file)) ne File::Spec->curdir() &&
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$file ne File::Spec->rootdir() ) {
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unshift(@fspec, basename($file));
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}
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if ( $sep eq '' ) {
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# This means kill path completely. Used with Makes who do
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# path searches, but doesn't handle output files in subdirectories,
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# like OpenWatcom WMAKE.
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return $fspec[scalar(@fspec)-1];
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} else {
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return join($sep, @fspec);
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}
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}
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#
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# Insert dependencies into a Makefile
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#
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sub insert_deps($) {
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my($file) = @_;
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$nexttemp++; # Unique serial number for each temp file
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my($tmp) = File::Spec->catfile(dirname($file), 'tmp.'.$nexttemp);
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sysopen(IN, $file, O_RDONLY)
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or die "$0: Cannot open input: $file\n";
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sysopen(OUT, $tmp, O_WRONLY|O_CREAT|O_TRUNC, 0666)
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or die "$0: Cannot open output: $tmp\n";
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my($line,$parm,$val);
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my($obj) = '.o'; # Defaults
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my($sep) = '/';
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my($cont) = "\\";
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my($maxline) = 78; # Seems like a reasonable default
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my @exclude = (); # Don't exclude anything
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while ( defined($line = <IN>) ) {
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if ( $line =~ /^\s*\#\s*@([a-z0-9-]+):\s*\"([^\"]*)\"/ ) {
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$parm = $1; $val = $2;
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if ( $parm eq 'object-ending' ) {
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$obj = $val;
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} elsif ( $parm eq 'path-separator' ) {
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$sep = $val;
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} elsif ( $parm eq 'line-width' ) {
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$maxline = $val+0;
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} elsif ( $parm eq 'continuation' ) {
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$cont = $val;
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} elsif ( $parm eq 'exclude' ) {
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@exclude = split(/\,/, $val);
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}
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} elsif ( $line eq $barrier ) {
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last; # Stop reading input at barrier line
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}
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print OUT $line;
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}
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close(IN);
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my $e;
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my %do_exclude = ();
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foreach $e (@exclude) {
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$do_exclude{$e} = 1;
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}
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my $dfile, $ofile, $str, $sl, $len;
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my @deps, $dep;
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print OUT $barrier;
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foreach $dfile ( sort(keys(%deps)) ) {
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if ( $dfile =~ /\.[Cc]$/ ) {
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$ofile = $dfile; $ofile =~ s/\.[Cc]$//;
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$str = convert_file($ofile,$sep).$obj.':';
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$len = length($str);
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print OUT $str;
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foreach $dep ($dfile, alldeps($dfile)) {
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unless ($do_exclude{$dep}) {
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$str = convert_file($dep,$sep);
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$sl = length($str)+1;
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if ( $len+$sl > $maxline-2 ) {
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print OUT ' ', $cont, "\n ", $str;
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$len = $sl;
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} else {
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print OUT ' ', $str;
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$len += $sl;
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}
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}
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}
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print OUT "\n";
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}
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}
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close(OUT);
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(unlink($file) && rename($tmp, $file))
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or die "$0: Failed to change $tmp -> $file\n";
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}
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#
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# Main program
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#
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%deps = ();
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@files = ();
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@mkfiles = ();
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$mkmode = 0;
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while ( defined($arg = shift(@ARGV)) ) {
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if ( $arg eq '-m' ) {
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$arg = shift(@ARGV);
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push(@mkfiles, $arg);
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} elsif ( $arg eq '-M' ) {
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$mkmode = 1; # Futher filenames are output Makefile names
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} elsif ( $arg eq '--' && $mkmode ) {
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$mkmode = 0;
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} elsif ( $arg =~ /^-/ ) {
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die "Unknown option: $arg\n";
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} else {
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if ( $mkmode ) {
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push(@mkfiles, $arg);
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} else {
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push(@files, $arg);
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}
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}
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}
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foreach $dir ( @files ) {
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opendir(DIR, $dir) or die "$0: Cannot open directory: $dir";
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while ( $file = readdir(DIR) ) {
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$path = ($dir eq File::Spec->curdir())
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? $file : File::Spec->catfile($dir,$file);
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if ( $file =~ /\.[Cc]$/ ) {
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scandeps($path);
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}
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}
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closedir(DIR);
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}
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foreach $mkfile ( @mkfiles ) {
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insert_deps($mkfile);
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}
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