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 $zopfli = which 'zopfli';
  19         system $zopfli => $file if $zopfli;
  20         gzip $file => "$file.gz", -Level => 9, Minimal => 1 unless $zopfli;
  21 }
  22
  23 sub write_gzfile {
  24         my ($file, @content) = @_;
  25         write_file $file, @content;
  26         gzip_file $file
  27 }
  28
  29 sub read_css_into_blocks {
  30         my ($file) = @_;
  31         my (@blocks, $block);
  32         for (read_file $file) {
  33                 $block .= $_;
  34                 if (/^}/) {
  35                         push @blocks, $block;
  36                         $block = '';
  37                 }
  38         }
  39         \@blocks
  40 }
  41
  42 my $default_theme = 'cyborg';
  43
  44 sub theme_prefix {
  45         my ($theme, $decl, $default) = @_;
  46         return $decl if $theme eq $default_theme || !$decl;
  47         return '' if $decl eq $default;
  48
  49         $default =~ s/[^{]*{\n//;
  50         $default =~ s/\n}[^}]*//;
  51         $decl =~ s/^$_$//m for split "\n", $default;
  52         $decl =~ s/\n+/\n/g;
  53
  54         my $prefix = "html.$theme";
  55         my ($first_line) = $decl =~ /([^{]*){/;
  56         $first_line =~ s/(,\s+)/$1 $prefix /g;
  57         $first_line = "$prefix $first_line";
  58         $decl =~ s/([^{]*){/$first_line\{/;
  59         $decl
  60 }
  61
  62 sub make_css {
  63         my $css = join '', map { read_file $_ } <css/*.css>;
  64
  65         my (%themes);
  66         for (<css/themes/*>) {
  67                 my ($theme) = m,themes/(.*)\.css,;
  68                 $themes{$theme} = read_css_into_blocks $_;
  69         }
  70         my @themes = sort grep { $_ ne $default_theme } keys %themes;
  71
  72         while (grep { scalar @$_ } values %themes) {
  73                 my %blocks = map { $_ => (shift @{$themes{$_}}) // '' } keys %themes;
  74                 $css .= $blocks{$default_theme};
  75                 $css .= theme_prefix $_, $blocks{$_}, $blocks{$default_theme} for @themes
  76         }
  77
  78         write_gzfile "static/css/all.css", minify $css
  79 }
  80
  81 sub make_js {
  82         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/*>;
  83         my $js = read_file 'static/js/all.js';
  84         write_gzfile 'static/js/all.js', '//# sourceMappingURL=/static/js/js.map', "\n", $js;
  85         system 'cp', '-rp', 'js', 'static/';
  86 }
  87
  88 my $css_mtime = -M 'static/css/all.css' // 0;
  89 for (<css/*>, <css/themes/*>) {
  90         if (!$css_mtime || $css_mtime > -M) {
  91                 make_css;
  92                 last
  93         }
  94 }
  95
  96 my $js_mtime = -M 'static/js/all.js' // 0;
  97 for (<js/*>) {
  98         if (!$js_mtime || $js_mtime > -M) {
  99                 make_js;
 100                 last
 101         }
 102 }
 103
 104 edit_file_lines {
 105         my ($file) = m,(static.*\.(?:css|js)),;
 106         return unless $file;
 107         my $hash = sha256_base64 scalar read_file $file;
 108         s/integrity=".*"/integrity="sha256-$hash="/;
 109 } 'tmpl/skel.en'