WIP

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

diff --git a/build-aux/subdirmk-setup b/build-aux/subdirmk-setup
old mode 100644 (file)
new mode 100755 (executable)
index 3d8ef7d..7522c07
--- a/build-aux/subdirmk-setup
+++ b/build-aux/subdirmk-setup
@@ -8,11 +8,19 @@
 
 use strict;
 
+our $srcdir;
+our @subdirs = @ARGV;
+
+die unless $ARGV[0] eq '--srcdir';
+die unless @ARGV>=2;
+shift @ARGV;
+($srcdir, @subdirs) = @ARGV;
+
 our $root = [ '.', [ ] ];
 # each node is [ 'relative subdir name', \@children ]
 
 sub build_tree () {
-    foreach my $subdir (@ARGV) {
+    foreach my $subdir (@subdirs) {
        my @path = $subdir eq '.' ? () : split m{/+}, $subdir;
        my $node = $root;
        foreach my $d (@path) {
@@ -28,7 +36,30 @@ sub build_tree () {
 
 sub target_varname ($$) {
     my ($var_prefix, $target) = @_;
-    return $vprefix.'TARGETS'.($target eq 'all' ? '' : "_$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";
+    $writing_output = undef;
+}
+
+sub start_output_file ($) {
+    close_any_output_file();
+    ($writing_output) = @_;
+    die if $output_files{$writing_output}++;
+    my $tmp = "$writing_output.tmp";
+    open O, ">", $tmp or die "create $tmp: $!\n";
+}
+
+sub o {
+    die unless defined $writing_output;
+    print O @_ or die "error writing $writing_output.tmp: $!\n";
 }
 
 sub write_makefile ($$) {
@@ -38,7 +69,7 @@ sub write_makefile ($$) {
     o <<END;
 default: all
 %:
-       $(MAKE) -C $cd ${dir_prefix}$@
+       \$(MAKE) -C $cd ${dir_prefix}$@
 END
 }
 
@@ -47,7 +78,7 @@ sub filter_subdir_mk ($$$$$) {
        $var_prefix, $targets) = @_;
 
     my $in = "${srcdir}/${dir_prefix}Subdir.mk.in";
-    open I, '<' $in or die "open $in: $!\n";
+    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 $esclit = '&';
@@ -145,7 +176,7 @@ sub process_tree() {
     process_subtree($root, [ ]);
     start_output_file("subdirs.mk");
     o "include Subdir.mk\n";
-    foreach my $subdir (@ARGV) {
+    foreach my $subdir (@subdirs) {
        o "include $subdir/Subdir.mk";
     }
 }