BEFORE CHANGE &&

[subdirmk.git] / build-aux / subdirmk-setup

diff --git a/build-aux/subdirmk-setup b/build-aux/subdirmk-setup
index 9f3c8c62a43ae7858af834a8595db26e7c245d38..1de88302fbd546bcf6efebf5066c8094ff6e96fa 100644 (file)
--- a/build-aux/subdirmk-setup
+++ b/build-aux/subdirmk-setup
@@ -8,25 +8,134 @@
 
 use strict;
 
-our @allsubdirs = @ARGV;
+our $root = [ '.', [ ] ];
+# each node is [ 'relative subdir name', \@children ]
 
-sub write_makefile () {
-    start_output_file("Makefile");
-    print O <<END;
+sub build_tree () {
+    foreach my $subdir (@ARGV) {
+       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 write_makefile ($$) {
+    my ($subdir,$depth) = @_;
+    start_output_file("$subdir/Makefile");
+    my $cd = $depth ? join('/', ('..',) x $depth) : '.';
+    o <<END;
+default: all
 %:
-       $(MAKE) -C @top $subdir/$@
+       $(MAKE) -C $cd $subdir/$@
 END
+}
+
+sub filter_subdir_mk ($) {
+    my ($subdir) = @_;
+    my $in = "$srcdir/$subdir/Subdir.mk.in";
+    open I, '<' $in or die "open $in: $!\n";
+    my $caps_re = qr{[A-Z][0-9_A-Z]*(?!\w)};
+    my $lc_e = qr{[a-z][-+,0-9_a-z]*(?!\w)};
+    my $esclit = '&';
+    my $esc = '\\&';
+    while (<I>) {
+       for (;;) {
+           s{^(.*?)(?=$esc)}{};
+           o $1;
+           last if m{^\n};
+           s{^$esc}{} or die "$_ ?";
+           if (s{^$esc}{}) {
+               o $esclit;
+           }
+           elsif (m{^(?=$caps_re)}) { o "${for_var}_" }
+           elsif (m{^(?=$lc_re)}) { o $dir_prefix }
+           elsif (s{^_}{}) { o "${for_var}_" }
+           elsif (s{^/}{}) { o $dir_prefix }
+           elsif (s{^=_}{}) { o $for_var }
+           elsif (s{^=/}{}) { o $dir_name }
+           elsif (s{^\^}{}) { o "\$(top_srcdir)${dir_suffix}" }
+           elsif (s{^\}}{}) { o "\$(abs_top_srcdir)${dir_suffix}" }
+           elsif (m{^[ \t]}) {
+               for (;;) {
+                   if (s{^[ \t]+($caps_re)}{}) {
+                       o "
+
+                   s{^
+       } else 
+       } 
+                    s{^~}{$dir_name} ||
+               
 
-    my @thesedirs = $subdir, grep { $_ =~ m{^$subdir/} } @allsubdirs;
-    printf O "include $_/Subdir.mk"
-       
+[A-Z][0-9A-Z_](?!\w
+(=?)([/.~])}{}) {
+               my ($val, 
+               o $subdir;
+           } elsif (s{^[_/]}{}) {
+               o 
+    }
+}
+
+sub process_subtree ($$) {
+    # => list of descendants (in form SUBDIR/)
+    # recursive, children first
+    my ($node, $path);
+    my $dprefix = join '', map { "${_}/" } @$path;
+    my $vprefix = join '', map { "${_}_" } @$path;
+    my $subdir = @$path ? (join '/', @$path) : '.';
+    write_makefile($subdir, 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($child, [  ]);
+    }
+    start_output_file("$subdir/Subdir.mk.tmp");
+
+    filter_subdir_mk();
+
+    $targets{$_}++ foreach
+       write_subdir($child);
+
+    my @targets = sort keys %targets;
+    foreach my $target (@targets) {
+       $vsuffix = $target eq 'all' ? '' : "_$target";
+       print O <<END;
+${dprefix}${target}: \$(${vprefix}TARGETS${vsuffix})
+END
+       if (@child_subdirs) {
+           print O "${dprefix}${target}:";
+           foreach my $child_subdir (@child_subdirs) {
+               print O " $child_subdir/$target";
+           }
+           print O "\n";
+       }
+    }
+    
+
+    foreach my $descendant (@descendants) {
+       foreach my $target (@$targets) {
+    print O <<END;
+END
 
 
 sub process_subdir ($$) {
     my ($subdir) = @_;
-    my $d
-    write_makefile($subdir);
+    my $depth = $subdir eq '.' ? 0 : scalar split m{/+}, $subdir;
+    write_makefile($subdir,$depth);
     filter_subdir_mk();
 }
 
-foreach (@allsubdirs) { process_subdir($_); }
+
+    
+build_tree();
+process_subtree($root, [ ]);