src/bin/paku.in: Move "datadir" to paku.lock

1 files changed, 37 insertions, 10 deletions

diff --git a/src/bin/paku.in b/src/bin/paku.in
index 4d92d9b..79cf703 100755
--- a/src/bin/paku.in
+++ b/src/bin/paku.in
@@ -4,6 +4,7 @@ use v5.34;
 use warnings;
 use feature 'signatures';
 no warnings ('experimental::signatures');
+use Scalar::Util qw(looks_like_number);
 use Getopt::Std ();
 use JSON ();
 use File::Basename ();
@@ -13,7 +14,8 @@ use Digest::SHA ();
 sub usage($fh) {
 	print $fh <<~'EOF'
 		Usage:
-		  paku [-d DIR] [-f FILE] ACTION
+		  paku [-f FILE] ACTION
+		  paku [-f FILE] -C CONFIG_PATH
 		  paku -h
 		EOF
 }
@@ -23,8 +25,8 @@ sub help($fh) {
 
 
 		Options:
-		  -d DIR        use DIR for intermediary data (default: .paku/)
 		  -f FILE       use data from FILE (default: paku.lock)
+		  -C CONFIG     get the final value of CONFIG_PATH
 		  -h, --help    show this message
 
 		  ACTION        what to emit, one of:
@@ -46,11 +48,15 @@ sub help($fh) {
 		    $ guix build -f packages.scm
 
 
-		  Emit Debian build recipes from "debian.json", using
-		  ".debtmp/" as the temporary directory, and execute them
-		  as is:
+		  Emit Debian build recipes from "debian.json", and execute
+		  them as is:
 
-		    $ paku -d .debtemp/ -f debian.json debian | make -f-
+		    $ paku -f debian.json debian | make -f-
+
+
+		  Find out what is the final value of "datadir":
+
+		    $ paku -C 'datadir'
 		EOF
 }
 
@@ -65,7 +71,7 @@ for (@ARGV) {
 }
 
 my %opts;
-if (!Getopt::Std::getopts('d:f:h', \%opts)) {
+if (!Getopt::Std::getopts('f:C:h', \%opts)) {
 	usage *STDERR;
 	exit 2;
 }
@@ -77,11 +83,8 @@ if ($opts{h}) {
 }
 
 
-my $dir   = $opts{d} || '.paku';
 my $fname = $opts{f} || 'paku.lock';
 
-my $action = $ARGV[0] or die "Missing ACTION";
-shift;
 
 sub load_json() {
 	my $json_str = do {
@@ -92,6 +95,27 @@ sub load_json() {
 	return JSON::decode_json($json_str);
 }
 
+
+
+sub get_in($j, @l) {
+	my ($head, @tail) = @l;
+	if (!defined $head) {
+		return ref $j ?
+			JSON::encode_json $j :
+			$j;
+	} elsif (looks_like_number($head)) {
+		return get_in($j->[$head], @tail);
+	} else {
+		return get_in($j->{$head}, @tail);
+	}
+}
+
+if ($opts{C}) {
+	say get_in(load_json(), split(/\./, $opts{C}));
+	exit;
+}
+
+
 my $licenses = {
 	guix => {
 		'AGPL-3.0-or-later' => 'agpl3+',
@@ -358,6 +382,7 @@ sub emit_guix_channel_key() {
 
 sub emit_debian() {
 	my $json = load_json();
+	my $dir = $json->{datadir};
 	my @debs = ("debs = \\\n");
 	my @targets = ();
 
@@ -760,5 +785,7 @@ my %actions = (
 	html               => \&emit_html,
 );
 
+my $action = $ARGV[0] or die "Missing ACTION";
+shift;
 my $fn = $actions{$action} or die "Unknown ACTION: \"$action\"";
 &$fn;