tools: rename convert tools to regular mk*

[sheet.git] / tools / mkcaniuse

diff --git a/tools/mkcaniuse b/tools/mkcaniuse
new file mode 100755 (executable)
index 0000000..3def627
--- /dev/null
+++ b/tools/mkcaniuse
@@ -0,0 +1,87 @@
+#!/usr/bin/env perl
+use 5.010;
+use strict;
+use warnings;
+
+use Data::Dump 'pp';
+use JSON;
+
+if (@ARGV) {
+       require Time::Piece;
+       require LWP::UserAgent;
+       require File::stat;
+
+       my $target = 'browser-support.inc.pl';
+       my $source = 'http://caniuse.com/data.json';
+
+       my $ua = LWP::UserAgent->new;
+       $ua->agent('sheet.shiar.nl/browser');
+       $ua->default_header('If-Modified-Since' => scalar gmtime $_->mtime)
+               for File::stat::stat($target);
+
+       my $res = $ua->get($source) or die "No data from $source\n";
+       !$res->is_error or die $res->status_line;
+       say $res->status_line;
+
+       exit 0 if $res->code == 304;  # unmodified
+
+       my $data = decode_json($res->decoded_content) or die "Parse error: $!";
+       my $updated = eval {
+               s/ GMT$//,
+               return Time::Piece->strptime($_) for $res->header('Last-Modified')
+       };
+       $data->{-date} = $_->datetime for $updated || ();
+
+       my $suffix = $updated && $updated->ymd || time;
+       open my $save, '>', (my $download = "browser-support-$suffix.inc.pl");
+       print {$save} pp($data);
+       close $save;
+
+       symlink $download, "$target.new" and rename "$target.new", $target
+               or die "New data at $download not linked: $!";
+       exit 0;
+}
+
+local $/;  # slurp
+my $source = readline;
+
+for ($source) { # cleanup
+       s/\A\(// and s/\);?\s*\Z//;  # empty callback
+       next if /^\{/;  # valid json
+
+       # convert seperate variables to hash keys
+       s/\A/{\n/;
+       s/^caniuse\.(\w+) *= */"$1":/gm;
+       s/;$/,/gm;
+       s/,\s*\Z/\n}/;
+       # fractions not supported by barekey
+       s/(?<=[,{\n]) (\d*\.\d) (?=:['"])/"$1"/gx;
+       # escapes not supported in singlequote
+       s{: *\K'((?:[^\\']+|\\.)*)'}{
+               my $_ = $1;
+               s/"/\\"/g;
+               s/\\'/'/g;
+               qq("$_");
+       }ge;
+}
+
+my $data = from_json($source, {
+       allow_singlequote => 1,
+       allow_barekey => 1,
+});
+
+print pp($data);
+
+__END__
+
+=head1 NAME
+
+mkcaniuse - Turn Javascript data into an equivalent Perl structure
+
+=head1 SYNOPSIS
+
+       curl http://caniuse.com/data.json |
+       tools/mkcaniuse.pl > browser-support.inc.pl
+
+       tools/mkcaniuse.pl auto
+