doctests: Extract and use

[subdirmk.git] / generate

diff --git a/generate b/generate
index fe3e3f5866674bcf17fa69ea6addaba1225cb3bb..dd6df29451ba1327f63055f57945c007a73aa566 100755 (executable)
--- a/generate
+++ b/generate
@@ -32,8 +32,8 @@ our @subdirs = @ARGV;
 
 s{/+$}{} foreach @subdirs;
 
-our $root = [ '.', [ ] ];
-# each node is [ 'relative subdir name', \@children ]
+our $root = [ '.', [ ], 1 ];
+# each node is [ 'relative subdir name', \@children, $mentioned ]
 
 sub build_tree () {
     foreach my $subdir (@subdirs) {
@@ -47,6 +47,7 @@ sub build_tree () {
            }
            $node = $c;
        }
+       $node->[2] = 1;
     }
 }
 
@@ -59,6 +60,7 @@ our $writing_output;
 our $buffering_output;
 our %output_files;
 our %input_files;
+our @output_makefiles;
 
 sub close_any_output_file() {
     return unless defined $writing_output;
@@ -112,10 +114,10 @@ Makefile run-main.mk:
 END
 }
 
-sub process_input_mk ($$$$$$$$);
-sub process_input_mk ($$$$$$$$) {
+sub process_input_mk ($$$$$$$$$);
+sub process_input_mk ($$$$$$$$$) {
     my ($dir_prefix, $dir_suffix, $dir_name,
-       $var_prefix, $targets,
+       $var_prefix, $var_prefix_name, $targets,
        $f, $esclitr, $enoent_ok) = @_;
 
     my $caps_re = qr{[A-Z]};
@@ -135,22 +137,25 @@ sub process_input_mk ($$$$$$$$) {
     }
     $input_files{$f}++;
 
+    my %srcdirmap = (
+                 '^' => "\$(top_srcdir)${dir_suffix}",
+                 '~' => "\$(top_srcdir)",
+                   );
     my %pfxmap = (
                  ''  => $dir_prefix,
-                 '^' => "\$(top_srcdir)${dir_suffix}/",
-                 '~' => "\$(top_srcdir)/",
                 );
+    $pfxmap{$_} = $srcdirmap{$_}.'/' foreach keys %srcdirmap;
 
     while (<$input>) {
        if (s#^\s*$esc\:##) {
            $buffering_output='';
        }
        for (;;) {
-           unless (s{^(.*?)(\\)?(?=$esc)}{}) { o $_; last; }
+           unless (s{^(.*?)$esc}{}) { o $_; last; }
            o $1;
-           if ($2) { s#^$esc##; o $$esclitr; next; }
-           s{^$esc}{} or die "$_ ?";
-           if (s{^$esc}{}) { o "$$esclitr$$esclitr" }
+           if (s{^\\$esc}{}) { o "$$esclitr" }
+           elsif (s{^\\\$}{}) { o '$' }
+           elsif (s{^$esc}{}) { o "$$esclitr$$esclitr" }
            elsif (s{^TARGETS(?:_([0-9a-zA-Z_]+))?(?=\W)}{}) {
                my $t = $1 // 'all';
                o target_varname($var_prefix, $t);
@@ -159,9 +164,10 @@ sub process_input_mk ($$$$$$$$) {
            elsif (m{^(?=$caps_re)}) { o $var_prefix }
            elsif (s{^([~^]?)(?=$lc_re)}{}) { o $pfxmap{$1} }
            elsif (s{^_}{}) { o $var_prefix }
-           elsif (s{^=_}{}) { o $var_prefix }
+           elsif (s{^=}{}) { o $var_prefix_name }
            elsif (s{^([~^]?)/}{}) { o $pfxmap{$1} }
-           elsif (s{^=/}{}) { o $dir_name }
+           elsif (s{^\.}{}) { o $dir_name }
+           elsif (s{^([~^])\.}{}) { o $srcdirmap{$1} }
            elsif (s{^([~^]?)(?=[ \t])}{}) {
                my $prefix = $pfxmap{$1} // die;
                my $after='';
@@ -174,9 +180,6 @@ sub process_input_mk ($$$$$$$$) {
            } elsif (s{^![ \t]+}{}) {
                o $_;
                $_ = '';
-           } elsif (s{^!(\S+)(?:[ \t]+|$)}{}) {
-               $$esclitr = $1;
-               $set_esc->();
            } else {
                die "bad escape $$esclitr$_ ";
            }
@@ -187,9 +190,12 @@ sub process_input_mk ($$$$$$$$) {
            if (m#^(-?)include\s+(\S+)\s+$#) {
                my $subf = "$srcdir/$2";
                process_input_mk($dir_prefix, $dir_suffix, $dir_name,
-                                $var_prefix, $targets,
+                                $var_prefix, $var_prefix_name, $targets,
                                 $subf, $esclitr, $1);
                o "\n";
+           } elsif (m#^changequote\s+(\S+)\s+$#) {
+               $$esclitr = $1;
+               $set_esc->();
            } else {
                die "unknown directive $_ ";
            }
@@ -199,9 +205,9 @@ sub process_input_mk ($$$$$$$$) {
     close $input or die "close $f: $!\n";
 }
 
-sub filter_subdir_mk ($$$$$) {
+sub filter_subdir_mk ($$$$$$) {
     my ($dir_prefix, $dir_suffix, $dir_name,
-       $var_prefix, $targets) = @_;
+       $var_prefix, $var_prefix_name, $targets) = @_;
 
     #use Data::Dumper;
     #print STDERR "filter @_\n";
@@ -211,7 +217,7 @@ sub filter_subdir_mk ($$$$$) {
     my $pi = sub {
        my ($f, $enoentok) = @_;
        process_input_mk($dir_prefix, $dir_suffix, $dir_name,
-                        $var_prefix, $targets,
+                        $var_prefix, $var_prefix_name, $targets,
                         "${srcdir}/$f", \$esclit, $enoentok);
     };
     $pi->("${dir_prefix}Subdir.sd.mk", 0);
@@ -230,8 +236,10 @@ sub process_subtree ($$) {
     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);
+    my $var_prefix_name = join '_', @$path ? @$path : qw(TOP);
+    my $var_prefix = "${var_prefix_name}_";
 
+    push @output_makefiles, "${dir_prefix}Subdir.mk";
     write_makefile($dir_prefix, scalar @$path);
 
     my %targets = (all => []);
@@ -244,8 +252,18 @@ sub process_subtree ($$) {
     }
     start_output_file("${dir_prefix}Subdir.mk.tmp");
 
-    filter_subdir_mk($dir_prefix, $dir_suffix, $dir_name,
-                    $var_prefix, \%targets);
+    if ($node->[2]) {
+       filter_subdir_mk($dir_prefix, $dir_suffix, $dir_name,
+                        $var_prefix, $var_prefix_name, \%targets);
+    } else {
+       my $sdmk = "${dir_prefix}Subdir.sd.mk";
+       if (stat $sdmk) {
+           die "$sdmk unexpectedly exists (${dir_prefix} not mentioned)";
+       } elsif ($!==ENOENT) {
+       } else {
+           die "stat $sdmk: $!";
+       }
+    }
 
     o "\n";
 
@@ -275,9 +293,8 @@ sub process_tree() {
     }
     o "SUBDIRMK_MAKEFILES :=\n";
     o "MAKEFILE_TEMPLATES :=\n";
-    o "SUBDIRMK_MAKEFILES += Subdir.mk\n";
-    foreach my $subdir (@subdirs) {
-       o "SUBDIRMK_MAKEFILES += $subdir/Subdir.mk\n";
+    foreach my $mf (@output_makefiles) {
+       o "SUBDIRMK_MAKEFILES += $mf\n";
     }
     foreach my $input (sort keys %input_files) {
        o "MAKEFILE_TEMPLATES += $input\n";