# $(srcdir)/subdirmk/generate [--srcdir=SRCDIR] [--] SUBDIR...
#
# generates in each subdirectory
-# Subdir.mk.tmp
+# Dir.mk.tmp
# Makefile
# and in toplevel
# main.mk.tmp
our $srcdir='.';
+# error handling methods:
+#
+# Error in input file, while $err_file and $. set, eg in most of
+# process_input_mk:
+# err "message";
+#
+# Other input or usage errors:
+# die "subdirmk: $file:$lno: problem\n";
+# die "subdirmk: some problem not locatable in that way\n";
+#
+# Usage error:
+# die "subdirmk $0: explanation of problem\n";
+#
+# System call error (not ENOENT) accessing input/output files:
+# die "description of problem eg maybe erbing noun: $!\n";
+#
+# Bug detedcted in `generate':
+# die "internal error (some information)?"; # or similar
+
while (@ARGV && $ARGV[0] =~ m/^-/) {
$_ = shift @ARGV;
last if $_ eq '--';
if (s/^--srcdir=//) {
$srcdir=$';
} else {
- die "$0: unknown option \`$_'\n";
+ die "subdirmk $0: unknown option \`$_'\n";
}
}
our @subdirs = @ARGV;
$writing_output = undef;
}
-sub o {
+sub oraw {
+ die 'internal error' unless defined $writing_output;
+ print O @_ or die "error writing $writing_output.tmp: $!\n";
+}
+
+sub oud { # undoubled
if (defined $buffering_output) {
$buffering_output .= $_ foreach @_;
return;
}
- die unless defined $writing_output;
- print O @_ or die "error writing $writing_output.tmp: $!\n";
+ oraw @_;
}
+our $ddbl;
+
sub od { # maybe $-doubled
- o @_;
+ if (!$ddbl) {
+ oud @_;
+ return;
+ }
+ foreach (@_) {
+ my $e = $_;
+ $e =~ s{\$}{\$\$}g;
+ oud $e;
+ }
}
sub start_output_file ($) {
close_any_output_file();
($writing_output) = @_;
- die "$writing_output ?" if $output_files{$writing_output}++;
+ die "internal error ($writing_output?)"
+ if $output_files{$writing_output}++;
my $tmp = "$writing_output.tmp";
open O, ">", $tmp or die "create $tmp: $!\n";
- o "# autogenerated - do not edit\n";
+ oraw "# autogenerated - do not edit\n";
}
sub install_output_files () {
my $suppress_templates=
'$(if $(filter-out clean real-clean, $(subdirmk_targets)),,'.
' MAKEFILE_TEMPLATES=)';
- o <<END;
+ oraw <<END;
default: all
\$(filter-out all,\$(MAKECMDGOALS)) all: run-main.mk
\@:
END
}
+our %varref;
+
our ($dir_prefix, $dir_suffix, $dir_name,
$var_prefix, $var_prefix_name);
$var_prefix = "${var_prefix_name}_";
}
+our $err_file;
+
+sub err ($) {
+ my ($m) = @_;
+ die "subdirmk: ${err_file}:$.: $m\n";
+}
+
+sub wrn ($) {
+ my ($m) = @_;
+ print STDERR "subdirmk: warning: ${err_file}:$.: $m\n";
+}
+
+sub ddbl_only ($) {
+ my ($e) = @_;
+ return if $ddbl;
+ err "escape &$e is valid only during \$-doubling";
+}
+
sub process_input_mk ($$$$);
sub process_input_mk ($$$$) {
my ($targets, $f, $esclitr, $enoent_ok) = @_;
my $input = new IO::File $f, '<';
if (!$input) {
- die "open $f: $!\n" unless $!==ENOENT && $enoent_ok;
+ err "open $f: $!" unless $!==ENOENT && $enoent_ok;
return;
}
$input_files{$f}++;
+ local $err_file=$f;
+
my %srcdirmap = (
'^' => "\$(top_srcdir)${dir_suffix}",
'~' => "\$(top_srcdir)",
);
$pfxmap{$_} = $srcdirmap{$_}.'/' foreach keys %srcdirmap;
+ local $ddbl;
+ my @nest = (['']);
+ my $evalcall_brackets;
+
+ my $push_nest = sub {
+ my ($nk, $nndbl, $what) = @_;
+ unshift @nest, [ $nk, $ddbl, $what, $. ];
+ $ddbl = $nndbl;
+ };
+ my $pop_nest = sub {
+ my ($nk) = @_;
+ err "unexpectedly closed $nk in middle of $nest[0][0] ($nest[0][2])"
+ unless $nest[0][0] eq $nk;
+ $ddbl = (shift @nest)[1];
+ };
+
+ # Our detection of variable settings does not have to be completely
+ # accurate, since it is only going to be used for advice to the user.
+ my $note_varref = sub {
+ my ($vn,$amp) = @_;
+ $varref{$vn}{$amp}{"$f:$."} = 1;
+ };
+
while (<$input>) {
if (s#^\s*$esc\:changequote\s+(\S+)\s+$##) {
$$esclitr = $1;
$set_esc->();
next;
- } elsif (s#^\s*$esc\:(?=(-?)include)##) {
+ } elsif (s#^\s*$esc\:endm\s+$##) {
+ $pop_nest->('macro');
+ od "endef\n";
+ next;
+ } elsif (s#^\s*$esc\:(?=(-?)include|macro)##) {
$buffering_output='';
} elsif (m#^\s*$esc\:([a-z][-0-9a-z_]*)#) {
- die "unknown directive $1";
+ err "unknown directive &:$1 or bad argumnt syntax";
} elsif (s{^\s*${esc}TARGETS(?:_([0-9a-zA-Z_]+))?(?=\W)}{}) {
my $t = $1 // 'all';
od target_varname($var_prefix, $t);
$targets->{$t} //= [ ];
}
for (;;) {
- unless (s{^(.*?)$esc}{}) { od $_; last; }
+ err 'cannot $-double &-processed RHS of directive'
+ if $ddbl && defined $buffering_output;
+ unless ($nest[0][0] eq 'eval'
+ ? s{^(.*?)($esc|[{}])}{}
+ : s{^(.*?)($esc)}{}) { od $_; last; }
od $1;
+ if ($2 eq '{') {
+ od $2;
+ $evalcall_brackets++;
+ next;
+ } elsif ($2 eq '}') {
+ od $2;
+ next if --$evalcall_brackets;
+ $pop_nest->('eval');
+ od '}';
+ next;
+ }
if (s{^\\$esc}{}) { od "$$esclitr" }
- elsif (s{^\\\$}{}) { od '$' }
+ elsif (s{^\\\$}{}) { oud '$' }
elsif (s{^\\\s+$}{}) { }
elsif (s{^$esc}{}) { od "$$esclitr$$esclitr" }
elsif (m{^(?=$caps_re)}) { od $var_prefix }
elsif (s{^([~^]?)/}{}) { od $pfxmap{$1} }
elsif (s{^\.}{}) { od $dir_name }
elsif (s{^([~^])\.}{}) { od $srcdirmap{$1} }
- elsif (s{^([~^]?)(?=[ \t])}{}) {
- my $prefix = $pfxmap{$1} // die;
+ elsif (s{^\$\-}{}) { $ddbl=undef; }
+ elsif (s{^\$\+}{}) { $ddbl=1; }
+ elsif (s{^\$\(}{}) { ddbl_only($&); oud "\$("; }
+ elsif (s{^\$(\d+)}{}) { ddbl_only($&); oud "\$($1)"; }
+ elsif (s{^\$\{}{}) {
+ err 'macro invocation cannot be re-$-doubled' if $ddbl;
+ od '${eval ${call ';
+ $evalcall_brackets = 1;
+ $push_nest->('eval',1, '&${...}');
+ } elsif (s{^([~^]?)(?=[ \t])}{}) {
+ my $prefix = $pfxmap{$1} // die "internal error ($1?)";
my $after='';
if (m{([ \t])$esc}) { ($_,$after) = ($`, $1.$'); }
s{(?<=[ \t])(?=\S)(?!\\\s*$)}{$prefix}g;
od $_;
$_ = '';
} else {
- die "bad escape $$esclitr$_ ";
+ m{^.{0,5}};
+ err "bad &-escape \`$$esclitr$&'";
}
}
if (defined $buffering_output) {
my $subf = "$srcdir/$2";
process_input_mk($targets, $subf, $esclitr, $1);
od "\n";
+ } elsif (m#^macro\s+(\S+)\s+$#) {
+ od "define $1\n";
+ $push_nest->('macro', 1, '&:macro');
} else {
- die "internal error buffering directive $_ ";
+ err "bad directive argument syntax";
}
}
}
+ die "subdirmk: $f:$nest[0][3]: unclosed $nest[0][0] ($nest[0][2])\n"
+ if $nest[0][0];
$input->error and die "read $f: $!\n";
close $input or die "close $f: $!\n";
}
my ($f, $enoentok) = @_;
process_input_mk($targets, "${srcdir}/$f", \$esclit, $enoentok);
};
- $pi->("Prefix.sd.mk", 1);
- $pi->("${dir_prefix}Subdir.sd.mk", 0);
- $pi->("Suffix.sd.mk", 1);
+ $pi->("Prefix.sd.mk", 1);
+ $pi->("${dir_prefix}Dir.sd.mk", 0);
+ $pi->("Suffix.sd.mk", 1);
}
sub process_subtree ($$);
# ^ this is the only var which we need before we come back from
# the recursion.
- push @output_makefiles, "${dir_prefix}Subdir.mk";
+ push @output_makefiles, "${dir_prefix}Dir.mk";
write_makefile($dir_prefix, scalar @$path);
my %targets = (all => []);
foreach my $child (@{ $node->[1] }) {
my @childpath = (@$path, $child->[0]);
my $child_subdir = join '/', @childpath;
- mkdir $child_subdir or $!==EEXIST or die "mkdir $child_subdir: $!";
+ mkdir $child_subdir or $!==EEXIST or die "mkdir $child_subdir: $!\n";
push @{ $targets{$_} }, $child_subdir foreach
process_subtree($child, \@childpath);
}
set_dir_vars($path);
- start_output_file("${dir_prefix}Subdir.mk.tmp");
+ start_output_file("${dir_prefix}Dir.mk.tmp");
if ($node->[2]) {
filter_subdir_mk(\%targets);
} else {
- my $sdmk = "${dir_prefix}Subdir.sd.mk";
+ my $sdmk = "${dir_prefix}Dir.sd.mk";
if (stat $sdmk) {
- die "$sdmk unexpectedly exists (${dir_prefix} not mentioned)";
+ die
+ "subdirmk: $sdmk unexpectedly exists (${dir_prefix} not mentioned on subdirmk/generate command line, maybe directory is missing from SUBDIRMK_SUBDIRS)";
} elsif ($!==ENOENT) {
} else {
- die "stat $sdmk: $!";
+ die "stat $sdmk: $!\n";
}
}
- o "\n";
+ oraw "\n";
my @targets = sort keys %targets;
foreach my $target (@targets) {
my $target_varname = target_varname($var_prefix, $target);
- print O "${dir_prefix}${target}:: \$($target_varname)";
+ oraw "${dir_prefix}${target}:: \$($target_varname)";
foreach my $child_subdir (@{ $targets{$target} }) {
- print O " $child_subdir/$target";
+ oraw " $child_subdir/$target";
}
- print O "\n";
+ oraw "\n";
}
if (@targets) {
- print O ".PHONY:";
- print O " ${dir_prefix}${_}" foreach @targets;
- print O "\n";
+ oraw ".PHONY:";
+ oraw " ${dir_prefix}${_}" foreach @targets;
+ oraw "\n";
}
return @targets;
process_input_mk(\%ntargets, "${srcdir}/Final.sd.mk", \$esclit, 1);
delete $ntargets{$_} foreach @$otargets;
my @ntargets = sort keys %ntargets;
- die "late new targets @ntargets" if @ntargets;
+ die "subdirmk: Final.sd.mk may not introduce new top-level targets".
+ " (@ntargets)\n" if @ntargets;
}
sub process_tree() {
process_final(\@targets);
start_output_file("main.mk.tmp");
foreach my $v (qw(top_srcdir abs_top_srcdir)) {
- o "$v=\@$v@\n";
+ oraw "$v=\@$v@\n";
}
- o "SUBDIRMK_MAKEFILES :=\n";
- o "MAKEFILE_TEMPLATES :=\n";
+ oraw "SUBDIRMK_MAKEFILES :=\n";
+ oraw "MAKEFILE_TEMPLATES :=\n";
foreach my $mf (@output_makefiles) {
- o "SUBDIRMK_MAKEFILES += $mf\n";
+ oraw "SUBDIRMK_MAKEFILES += $mf\n";
}
foreach my $input (sort keys %input_files) {
- o "MAKEFILE_TEMPLATES += $input\n";
+ oraw "MAKEFILE_TEMPLATES += $input\n";
+ }
+ oraw "include \$(SUBDIRMK_MAKEFILES)\n";
+}
+
+sub print_varref_warnings () {
+ foreach my $vn (sort keys %varref) {
+ my $vv = $varref{$vn};
+ next unless $vv->{''} && $vv->{1};
+ print STDERR "subdirmk: warning: saw both $vn and &$vn\n";
+ foreach my $amp ('', 1) {
+ printf STDERR " saw %s%s at %s\n",
+ ($amp ? '&' : ''), $vn, $_
+ foreach sort keys %{ $vv->{$amp} };
+ }
}
- o "include \$(SUBDIRMK_MAKEFILES)\n";
}
build_tree();
process_tree();
+print_varref_warnings();
install_output_files();
~ian / subdirmk.git / blobdiff