browser: store only changed values in version support

[sheet.git] / tools / mkcaniuse

diff --git a/tools/mkcaniuse b/tools/mkcaniuse
index f72122b6f309538a494d027a27d1194ac3068d76..b162c2f3f1d521ea8fb536f39b980963e7e56ccb 100755 (executable)
--- a/tools/mkcaniuse
+++ b/tools/mkcaniuse
@@ -8,7 +8,7 @@ use File::stat;
 use Time::Piece;
 use List::Util 'uniq';
 
-our $VERSION = '1.03';
+our $VERSION = '1.04';
 
 my %BROWSERJOIN = (
        edge    => 'ie',
@@ -58,6 +58,22 @@ for my $feature (values %{ $data->{data} }) {
 
 while (my ($agent, $row) = each %{ $data->{agents} }) {
        $row->{versions} = [ uniq map { $_->{version} } @{ $row->{version_list} } ];
+
+       # omit identical values from subsequent versions
+       for my $feature (values %{ $data->{data} }) {
+               my $cmp;  # same value to be omitted
+               my $verstats = $feature->{stats}->{$agent};
+               for my $version (@{ $row->{versions} }) {
+                       defined $verstats->{$version}
+                               or warn "missing feature $feature->{title} for $agent $version";
+                       if (defined $cmp and $verstats->{$version} eq $cmp) {
+                               delete $verstats->{$version};
+                       }
+                       else {
+                               $cmp = $verstats->{$version};
+                       }
+               }
+       }
 }
 
 say "# automatically generated by $0";