use strict;
-our @allsubdirs = @ARGV;
+our $srcdir;
+our @subdirs = @ARGV;
-sub write_makefile () {
- start_output_file("Makefile");
- print O <<END;
-%:
- $(MAKE) -C @top $subdir/$@
+die unless $ARGV[0] eq '--srcdir';
+die unless @ARGV>=2;
+shift @ARGV;
+($srcdir, @subdirs) = @ARGV;
+
+s{/+$}{} foreach @subdirs;
+
+our $root = [ '.', [ ] ];
+# each node is [ 'relative subdir name', \@children ]
+
+sub build_tree () {
+ foreach my $subdir (@subdirs) {
+ my @path = $subdir eq '.' ? () : split m{/+}, $subdir;
+ my $node = $root;
+ foreach my $d (@path) {
+ my ($c,) = grep { $_->[0] eq $d } @{ $node->[1] };
+ if (!$c) {
+ $c = [ $d, [ ] ];
+ push @{ $node->[1] }, $c;
+ }
+ $node = $c;
+ }
+ }
+}
+
+sub target_varname ($$) {
+ my ($var_prefix, $target) = @_;
+ return $var_prefix.'TARGETS'.($target eq 'all' ? '' : "_$target");
+}
+
+our $writing_output;
+our %output_files;
+
+sub close_any_output_file() {
+ return unless defined $writing_output;
+ O->error and die "error writing $writing_output.tmp: $! (?)\n";
+ close O or die "error closing $writing_output.tmp: $!\n";
+ $writing_output = undef;
+}
+
+sub o {
+ die unless defined $writing_output;
+ print O @_ or die "error writing $writing_output.tmp: $!\n";
+}
+
+sub start_output_file ($) {
+ close_any_output_file();
+ ($writing_output) = @_;
+ die "$writing_output ?" if $output_files{$writing_output}++;
+ my $tmp = "$writing_output.tmp";
+ open O, ">", $tmp or die "create $tmp: $!\n";
+ o "# autogenerated - do not edit\n";
+}
+
+sub install_output_files () {
+ close_any_output_file();
+ foreach my $f (sort keys %output_files) {
+ rename "$f.tmp", $f or die "install new $f: $!\n";
+ }
+}
+
+sub write_makefile ($$) {
+ my ($dir_prefix,$depth) = @_;
+ #print STDERR "write_makefile @_\n";
+ start_output_file("${dir_prefix}Makefile");
+ my $cd = $depth ? join('/', ('..',) x $depth) : '.';
+ o <<END;
+default: all
+ \@: \$@
+%: FORCE-ALWAYS-RUN
+ \$(MAKE) -C $cd -f subdirs.mk ${dir_prefix}\$@
+Makefile FORCE-ALWAYS-RUN:
+ \@: \$@
+.SUFFIXES:
END
+}
+
+sub filter_subdir_mk ($$$$$) {
+ my ($dir_prefix, $dir_suffix, $dir_name,
+ $var_prefix, $targets) = @_;
+
+ #use Data::Dumper;
+ #print STDERR "filter @_\n";
+
+ my $in = "${dir_prefix}Subdir.mk.in";
+ my $caps_re = qr{[A-Z][0-9_A-Z]*(?=\W)};
+ my $lc_re = qr{[a-z][-+,0-9_a-z]*(?=\W)};
+ my $esclit = '&';
+ my $esc = '\\&';
+
+ for my $f ($in, "Perdir.mk.in") {
+ open I, '<', $f or die "open $f: $!\n";
+ while (<I>) {
+ for (;;) {
+ unless (s{^(.*?)(\\)?(?=$esc)}{}) { o $_; last; }
+ o $1;
+ if ($2) { o $esclit; next; }
+ s{^$esc}{} or die "$_ ?";
+ if (s{^$esc}{}) { o "$esclit$esclit" }
+ elsif (s{^TARGETS(?:_([0-9a-zA-Z_]+))?(?=\W)}{}) {
+ my $t = $1 // 'all';
+ o target_varname($var_prefix, $t);
+ $targets->{$t}=1;
+ }
+ elsif (m{^(?=$caps_re)}) { o $var_prefix }
+ elsif (m{^(?=$lc_re)}) { o $dir_prefix }
+ elsif (s{^_}{}) { o $var_prefix }
+ elsif (s{^/}{}) { o $dir_prefix }
+ elsif (s{^=_}{}) { o $var_prefix }
+ elsif (s{^=/}{}) { o $dir_name }
+ elsif (s{^\^}{}) { o "\$(top_srcdir)${dir_suffix}" }
+ elsif (s{^\}}{}) { o "\$(abs_top_srcdir)${dir_suffix}" }
+ elsif (s{^(?:[ \t]+([~^]))?(?=[ \t])}{}) {
+ my $prefix =
+ !$1 ? $dir_prefix :
+ $1 eq '~' ? '$(abs_top_srcdir)'.$dir_suffix :
+ $1 eq '~' ? '$(abs_top_srcdir)'.$dir_suffix :
+ die;
+ my $after='';
+ if (m{([ \t])$esc}) { ($_,$after) = ($`, $1.$'); }
+ s{(?<=[ \t])(?=\S)(?!\\\s*$)}{$prefix}g;
+ o $_;
+ $_ = $after;
+ } elsif (s{^![ \t]+}{}) {
+ o $_;
+ $_ = '';
+ } elsif (s{^!(\pPosixWord+|\pPosixPunct+)[ \t]*}{}) {
+ $esclit = $1;
+ $esc = $esclit;
+ $esc =~ s/\W/\\$&/g;
+ } else {
+ die "bad escape $esclit$_ ";
+ }
+ }
+ }
+ I->error and die "read $f: $!\n";
+ }
+}
- my @thesedirs = $subdir, grep { $_ =~ m{^$subdir/} } @allsubdirs;
- printf O "include $_/Subdir.mk"
-
+sub process_subtree ($$);
+sub process_subtree ($$) {
+ # => list of descendants (in form SUBDIR/)
+ # recursive, children first
+ my ($node, $path) = @_;
+ #use Data::Dumper;
+ #print STDERR Dumper(\@_);
+
+ my $dir_prefix = join '', map { "$_/" } @$path;
+ my $dir_suffix = join '', map { "/$_" } @$path;
+ my $dir_name = join '/', @$path ? @$path : '.';
+ my $var_prefix = join '', map { "${_}_" } @$path ? @$path : qw(TOP);
+
+ write_makefile($dir_prefix, scalar @$path);
+
+ my %targets = qw(all 1);
+ my @child_subdirs;
+ foreach my $child (@{ $node->[1] }) {
+ my @childpath = (@$path, $child->[0]);
+ push @child_subdirs, join '/', @childpath;
+ $targets{$_}++ foreach
+ process_subtree($child, \@childpath);
+ }
+ start_output_file("${dir_prefix}Subdir.mk.tmp");
+
+ filter_subdir_mk($dir_prefix, $dir_suffix, $dir_name,
+ $var_prefix, \%targets);
+
+ o "\n";
+
+ my @targets = sort keys %targets;
+ foreach my $target (@targets) {
+ my $target_varname = target_varname($var_prefix, $target);
+ print O "${dir_prefix}${target}: \$($target_varname)";
+ foreach my $child_subdir (@child_subdirs) {
+ print O " $child_subdir/$target";
+ }
+ print O "\n";
+ }
+
+ return @targets;
+}
-sub process_subdir ($$) {
- my ($subdir) = @_;
- my $d
- write_makefile($subdir);
- filter_subdir_mk();
+sub process_tree() {
+ process_subtree($root, [ ]);
+ start_output_file("subdirs.mk.tmp");
+ foreach my $v (qw(top_srcdir abs_top_srcdir)) {
+ o "$v=\@$v@\n";
+ }
+ o "MAKEFILES += Subdir.mk\n";
+ foreach my $subdir (@subdirs) {
+ o "MAKEFILES += $subdir/Subdir.mk\n";
+ }
+ o "include \$(MAKEFILES)";
}
-foreach (@allsubdirs) { process_subdir($_); }
+build_tree();
+process_tree();
+install_output_files();
~ian / subdirmk.git / blobdiff