make_static.PL

   1 #!/usr/bin/perl
   2 use v5.14;
   3 use warnings;
   4
   5 use CSS::Minifier::XS qw/minify/;
   6 use Digest::SHA qw/sha256_base64/;
   7 use IO::Compress::Gzip qw/gzip/;
   8 use File::Slurp qw/read_file write_file edit_file_lines/;
   9 use File::Which;
  10 use List::Util qw/first/;
  11
  12 mkdir 'static';
  13 mkdir 'static/css';
  14 mkdir 'static/js';
  15
  16 sub gzip_file {
  17         my ($file) = @_;
  18         my $brotli = which 'brotli';
  19         my $zopfli = which 'zopfli';
  20         system $brotli => '--input', $file, '--output', "$file.br" if $brotli;
  21         system $zopfli => $file if $zopfli;
  22         gzip $file => "$file.gz", -Level => 9, Minimal => 1 unless $zopfli;
  23 }
  24
  25 sub write_gzfile {
  26         my ($file, @content) = @_;
  27         write_file $file, @content;
  28         gzip_file $file
  29 }
  30
  31 sub read_css_into_blocks {
  32         my ($file) = @_;
  33         my (@blocks, $block);
  34         for (read_file $file) {
  35                 $block .= $_;
  36                 if (/^}/) {
  37                         push @blocks, $block;
  38                         $block = '';
  39                 }
  40         }
  41         \@blocks
  42 }
  43
  44 my $default_theme = 'cyborg';
  45
  46 sub theme_prefix {
  47         my ($theme, $decl, $default) = @_;
  48         return $decl if $theme eq $default_theme || !$decl;
  49         return '' if $decl eq $default;
  50
  51         $default =~ s/[^{]*{\n//;
  52         $default =~ s/\n}[^}]*//;
  53         $decl =~ s/^$_$//m for split "\n", $default;
  54         $decl =~ s/\n+/\n/g;
  55
  56         my $prefix = "html.$theme";
  57         my ($first_line) = $decl =~ /([^{]*){/;
  58         $first_line =~ s/(,\s+)/$1 $prefix /g;
  59         $first_line = "$prefix $first_line";
  60         $decl =~ s/([^{]*){/$first_line\{/;
  61         $decl
  62 }
  63
  64 sub make_css {
  65         my $css = join '', map { read_file $_ } <css/*.css>;
  66
  67         my (%themes);
  68         for (<css/themes/*>) {
  69                 my ($theme) = m,themes/(.*)\.css,;
  70                 $themes{$theme} = read_css_into_blocks $_;
  71         }
  72         my @themes = sort grep { $_ ne $default_theme } keys %themes;
  73
  74         while (grep { scalar @$_ } values %themes) {
  75                 my %blocks = map { $_ => (shift @{$themes{$_}}) // '' } keys %themes;
  76                 $css .= $blocks{$default_theme};
  77                 $css .= theme_prefix $_, $blocks{$_}, $blocks{$default_theme} for @themes
  78         }
  79
  80         write_gzfile "static/css/all.css", minify $css
  81 }
  82
  83 sub make_js {
  84         system java => -jar => 'compiler.jar', qw,-O SIMPLE --create_source_map static/js/js.map --js_output_file static/js/all.js --language_in ECMASCRIPT6_STRICT --language_out ECMASCRIPT5_STRICT --source_map_location_mapping js/|/static/js/,, <js/*>;
  85         my $js = read_file 'static/js/all.js';
  86         write_gzfile 'static/js/all.js', '//# sourceMappingURL=/static/js/js.map', "\n", $js;
  87         system 'cp', '-rp', 'js', 'static/';
  88 }
  89
  90 my $css_mtime = -M 'static/css/all.css' // 0;
  91 for (<css/*>, <css/themes/*>) {
  92         if (!$css_mtime || $css_mtime > -M) {
  93                 make_css;
  94                 last
  95         }
  96 }
  97
  98 my $js_mtime = -M 'static/js/all.js' // 0;
  99 for (<js/*>) {
 100         if (!$js_mtime || $js_mtime > -M) {
 101                 make_js;
 102                 last
 103         }
 104 }
 105
 106 edit_file_lines {
 107         my ($file) = m,(static.*\.(?:css|js)),;
 108         return unless $file;
 109         my $hash = sha256_base64 scalar read_file $file;
 110         s/integrity=".*"/integrity="sha256-$hash="/;
 111 } 'tmpl/skel.en'