GH#927 Add plain mode + version filter to release/versions endpoint

This commit adds support for two new parameters to the release/versions endpoint.

Examples:

https://fastapi.metacpan.org/v1/release/versions/perl?plain=1
https://fastapi.metacpan.org/v1/release/versions/perl?versions=5.26.0,5.30.1
https://fastapi.metacpan.org/v1/release/versions/perl?plain=1&versions=5.26.0,5.30.1

Author: mickeyn

lib/MetaCPAN/Query/Release.pm

@@ -560,11 +560,28 @@ sub all_by_author {
 }
 
 sub versions {
-    my ( $self, $dist ) = @_;
+    my ( $self, $dist, $versions ) = @_;
 
     my $size = $dist eq 'perl' ? 1000 : 250;
+
+    my $query;
+
+    if ( @{$versions} ) {
+        $query = {
+            bool => {
+                must => [
+                    { term  => { distribution => $dist } },
+                    { terms => { version      => $versions } },
+                ]
+            }
+        };
+    }
+    else {
+        $query = { term => { distribution => $dist } };
+    }
+
     my $body = {
-        query  => { term => { distribution => $dist } },
+        query  => $query,
         size   => $size,
         sort   => [ { date => 'desc' } ],
         fields => [

lib/MetaCPAN/Server/Controller/Release.pm

@@ -86,9 +86,21 @@ sub all_by_author : Path('all_by_author') : Args(1) {
 
 sub versions : Path('versions') : Args(1) {
     my ( $self, $c, $dist ) = @_;
+    my %params = %{ $c->req->params }{qw( plain versions )};
     $c->add_dist_key($dist);
     $c->cdn_max_age('1y');
-    $c->stash_or_detach( $self->model($c)->versions($dist) );
+    my $data = $self->model($c)
+        ->versions( $dist, [ split /,/, $params{versions} || '' ] );
+
+    if ( $params{plain} ) {
+        my $data = join "\n",
+            map { join "\t", @{$_}{qw/ version download_url /} }
+            @{ $data->{releases} };
+        $c->res->body($data);
+    }
+    else {
+        $c->stash_or_detach($data);
+    }
 }
 
 sub top_uploaders : Path('top_uploaders') : Args() {