X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ian/git?p=subdirmk.git;a=blobdiff_plain;f=subdirmk%2Fgenerate;h=55323d2770aec5d0ecfa2a96a132acaeaa1eb7cf;hp=a10e055590c9df2c671e85d264ef2bfa7a5cb339;hb=b1f14d76cfc604fedd57499c6d8ce44a91391067;hpb=ac5e06a07b23212991e152370900361adee14a58

diff --git a/subdirmk/generate b/subdirmk/generate
index a10e055..55323d2 100755
--- a/subdirmk/generate
+++ b/subdirmk/generate
@@ -2,15 +2,11 @@
 #
 # $(srcdir)/subdirmk/generate [--srcdir=SRCDIR] [--] SUBDIR...
 #
-# generates in each subdirectory
-#   Subdir.mk.tmp
-#   Makefile
-# and in toplevel
-#   main.mk.tmp
-# from in each subdirectory
-#   Subdir.mk.in
-# and at toplevel
-#   Perdir.mk.in
+# generates in each subdirectory	from in each subdirectory
+#     Subdir.mk.tmp			    Subdir.mk.in
+#     Makefile
+# and in toplevel			and in toplevel
+#     main.mk.tmp			    Perdir.mk.in
 
 use strict;
 use POSIX;
@@ -56,6 +52,7 @@ sub target_varname ($$) {
 }
 
 our $writing_output;
+our $buffering_output;
 our %output_files;
 
 sub close_any_output_file() {
@@ -66,6 +63,10 @@ sub close_any_output_file() {
 }
 
 sub o {
+    if (defined $buffering_output) {
+	$buffering_output .= $_ foreach @_;
+	return;
+    }
     die unless defined $writing_output;
     print O @_ or die "error writing $writing_output.tmp: $!\n";
 }
@@ -102,28 +103,37 @@ Makefile FORCE-ALWAYS-RUN:
 END
 }
 
-sub filter_subdir_mk ($$$$$) {
+sub process_input_mk ($$$$$$$$);
+sub process_input_mk ($$$$$$$$) {
     my ($dir_prefix, $dir_suffix, $dir_name,
-	$var_prefix, $targets) = @_;
-
-    #use Data::Dumper;
-    #print STDERR "filter @_\n";
+	$var_prefix, $targets,
+	$f, $esclitr, $enoent_ok) = @_;
 
-    my $in = "${srcdir}/${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, "${srcdir}/Perdir.mk.in") {
-      open I, '<', $f or die "open $f: $!\n";
-      while (<I>) {
+    my $esc;
+    my $set_esc = sub {
+	$esc = $$esclitr;
+	$esc =~ s/\W/\\$&/g;
+    };
+    $set_esc->();
+
+    my $input = new IO::File $f, '<';
+    if (!$input) {
+	die "open $f: $!\n" unless $!==ENOENT && $enoent_ok;
+	return;
+    }
+    while (<$input>) {
+	if (s#^\s*$esc\:##) {
+	    $buffering_output='';
+	}
 	for (;;) {
 	    unless (s{^(.*?)(\\)?(?=$esc)}{}) { o $_; last; }
 	    o $1;
-	    if ($2) { o $esclit; next; }
+	    if ($2) { o $$esclitr; next; }
 	    s{^$esc}{} or die "$_ ?";
-	    if (s{^$esc}{}) { o "$esclit$esclit" }
+	    if (s{^$esc}{}) { o "$$esclitr$$esclitr" }
 	    elsif (s{^TARGETS(?:_([0-9a-zA-Z_]+))?(?=\W)}{}) {
 		my $t = $1 // 'all';
 		o target_varname($var_prefix, $t);
@@ -152,16 +162,48 @@ sub filter_subdir_mk ($$$$$) {
 		o $_;
 		$_ = '';
 	    } elsif (s{^!(\S+)(?:[ \t]+|$)}{}) {
-		$esclit = $1;
-		$esc = $esclit;
-		$esc =~ s/\W/\\$&/g;
+		$$esclitr = $1;
+		$set_esc->();
+	    } else {
+		die "bad escape $$esclitr$_ ";
+	    }
+	}
+	if (defined $buffering_output) {
+	    $_=$buffering_output;
+	    $buffering_output=undef;
+	    if (m#^(-?)include\s+(\S+)\s+$#) {
+		my $subf = "$srcdir/$2";
+		o "MAKEFILE_TEMPLATES += $subf\n";
+		process_input_mk($dir_prefix, $dir_suffix, $dir_name,
+				 $var_prefix, $targets,
+				 $subf, $esclitr, $subf);
+		o "\n";
 	    } else {
-		die "bad escape $esclit$_ ";
+		die "unknown directive $_ ";
 	    }
 	}
-      }
-      I->error and die "read $f: $!\n";
     }
+    $input->error and die "read $f: $!\n";
+    close $input or die "close $f: $!\n";
+}
+
+sub filter_subdir_mk ($$$$$) {
+    my ($dir_prefix, $dir_suffix, $dir_name,
+	$var_prefix, $targets) = @_;
+
+    #use Data::Dumper;
+    #print STDERR "filter @_\n";
+
+    my $esclit = '&';
+
+    my $pi = sub {
+	my ($f, $enoentok) = @_;
+	process_input_mk($dir_prefix, $dir_suffix, $dir_name,
+			 $var_prefix, $targets,
+			 "${srcdir}/$f", \$esclit, $enoentok);
+    };
+    $pi->("${dir_prefix}Subdir.mk.in", 0);
+    $pi->("Perdir.mk.in",              1);
 }
 
 sub process_subtree ($$);