README: Do not assert that all directive arguments are &-expanded

[subdirmk.git] / generate

diff --git a/generate b/generate
index 351926b80751b7f78ba4d95e3dbc7839fa6913ed..747bb0cb002d70ee3c7e3635db0504bdc15ea389 100755 (executable)
--- a/generate
+++ b/generate
@@ -114,10 +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]};
@@ -137,33 +137,44 @@ 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\:##) {
+       if (s#^\s*$esc\:changequote\s+(\S+)\s+$##) {
+           $$esclitr = $1;
+           $set_esc->();
+           next;
+       } elsif (s#^\s*$esc\:(?=(-?)include)##) {
            $buffering_output='';
+       } elsif (m#^\s*$esc\:([a-z][-0-9a-z_]*)#) {
+           die "unknown directive $1";
+       } elsif (s{^\s*${esc}TARGETS(?:_([0-9a-zA-Z_]+))?(?=\W)}{}) {
+           my $t = $1 // 'all';
+           o target_varname($var_prefix, $t);
+           $targets->{$t} //= [ ];
        }
        for (;;) {
-           unless (s{^(.*?)(\\)?(?=$esc)}{}) { o $_; last; }
+           unless (s{^(.*?)$esc}{}) { o $_; last; }
            o $1;
-           if ($2) { s#^$esc##; o $$esclitr; next; }
-           s{^$esc}{} or die "$_ ?";
-           if (s{^$esc}{}) { o "$$esclitr$$esclitr" }
-           elsif (s{^TARGETS(?:_([0-9a-zA-Z_]+))?(?=\W)}{}) {
-               my $t = $1 // 'all';
-               o target_varname($var_prefix, $t);
-               $targets->{$t} //= [ ];
-           }
+           if (s{^\\$esc}{}) { o "$$esclitr" }
+           elsif (s{^\\\$}{}) { o '$' }
+           elsif (s{^\\\s+$}{}) { }
+           elsif (s{^$esc}{}) { o "$$esclitr$$esclitr" }
            elsif (m{^(?=$caps_re)}) { o $var_prefix }
+           elsif (s{^\$([A-Za-z]\w+)}{}) { o "\$(${var_prefix}$1)" }
            elsif (s{^([~^]?)(?=$lc_re)}{}) { o $pfxmap{$1} }
            elsif (s{^_}{}) { o $var_prefix }
-           elsif (s{^=_}{}) { o $var_prefix }
+           elsif (s{^=}{}) { o $var_prefix_name }
            elsif (s{^([~^]?)/}{}) { o $pfxmap{$1} }
-           elsif (s{^=/}{}) { o $dir_name }
+           elsif (s{^\.}{}) { o $dir_name }
+           elsif (s{^([~^])\.}{}) { o $srcdirmap{$1} }
            elsif (s{^([~^]?)(?=[ \t])}{}) {
                my $prefix = $pfxmap{$1} // die;
                my $after='';
@@ -186,14 +197,11 @@ sub process_input_mk ($$$$$$$$) {
            if (m#^(-?)include\s+(\S+)\s+$#) {
                my $subf = "$srcdir/$2";
                process_input_mk($dir_prefix, $dir_suffix, $dir_name,
-                                $var_prefix, $targets,
+                                $var_prefix, $var_prefix_name, $targets,
                                 $subf, $esclitr, $1);
                o "\n";
-           } elsif (m#^changequote\s+(\S+)\s+$#) {
-               $$esclitr = $1;
-               $set_esc->();
            } else {
-               die "unknown directive $_ ";
+               die "internal error buffering directive $_ ";
            }
        }
     }
@@ -201,9 +209,9 @@ 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";
@@ -213,7 +221,7 @@ sub filter_subdir_mk ($$$$$) {
     my $pi = sub {
        my ($f, $enoentok) = @_;
        process_input_mk($dir_prefix, $dir_suffix, $dir_name,
-                        $var_prefix, $targets,
+                        $var_prefix, $var_prefix_name, $targets,
                         "${srcdir}/$f", \$esclit, $enoentok);
     };
     $pi->("${dir_prefix}Subdir.sd.mk", 0);
@@ -232,7 +240,8 @@ sub process_subtree ($$) {
     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);
@@ -249,7 +258,7 @@ sub process_subtree ($$) {
 
     if ($node->[2]) {
        filter_subdir_mk($dir_prefix, $dir_suffix, $dir_name,
-                        $var_prefix, \%targets);
+                        $var_prefix, $var_prefix_name, \%targets);
     } else {
        my $sdmk = "${dir_prefix}Subdir.sd.mk";
        if (stat $sdmk) {