[bin] detect and forward LUA_CPATH

CHANGELOG.md

@@ -16,7 +16,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Detecting local rover installation from the CLI [PR #519](https://github.com/3scale/apicast/pull/519)
 - Use more `command` instead of `which` to work in plain shell [PR #521](https://github.com/3scale/apicast/pull/521)
-- Fixed rockspec so APIcast can be installed by luarocks [PR #523](https://github.com/3scale/apicast/pull/523)
+- Fixed rockspec so APIcast can be installed by luarocks [PR #523](https://github.com/3scale/apicast/pull/523), [PR #538](https://github.com/3scale/apicast/pull/538)
 - Fix loading renamed APIcast code [PR #525](https://github.com/3scale/apicast/pull/525)
 - Fix `apicast` command when installed from luarocks [PR #527](https://github.com/3scale/apicast/pull/527)
 - Fix lua docs formatting in the CORS policy [PR #530](https://github.com/3scale/apicast/pull/530)

gateway/bin/apicast

@@ -36,20 +36,23 @@ _LUA_
         return (
             $rock . '/bin',
             $rock . '/conf',
-            $rock =~ s{/lib/luarocks/rocks/apicast/.+?/?$}[/share/lua/@{[ detect_lua_version ]}]r
+            $rock =~ s{/lib/luarocks/rocks/apicast/.+?/?$}[/share/lua/@{[ detect_lua_version ]}]r,
+            $rock =~ s{/lib/luarocks/rocks/apicast/.+?/?$}[/lib/lua/@{[ detect_lua_version ]}]r,
         );
     } else {
         return (
             $apicast_dir . '/bin',
             $apicast_dir,
-            $apicast_dir . '/src'
+            $apicast_dir . '/src',
+            $apicast_dir . '/lib',
         )
     }
 }
 
-my ($apicast_bin, $apicast_conf, $apicast_src) = detect_apicast_paths();
+my ($apicast_bin, $apicast_conf, $apicast_src, $apicast_lib) = detect_apicast_paths();
 
 my $lua_path = $ENV{LUA_PATH};
+my $lua_lib = $ENV{LUA_CPATH};
 my $cwd = getcwd();
 
 $ENV{PATH} .= ":$cwd/lua_modules/bin";
@@ -61,11 +64,14 @@ if ($rover && !$lua_path) {
     exec '/usr/bin/env', $rover, 'exec', $0, @ARGV
 } else {
     $lua_path ||= ';';
+    $lua_lib ||= ';';
 }
 
 $ENV{APICAST_DIR} = $apicast_conf;
 
 $ENV{LUA_PATH} = sprintf('%1$s/?.lua;', $apicast_src) . $lua_path;
+$ENV{LUA_CPATH} = sprintf('%1$s/?.so;', $apicast_lib) . $lua_lib;
+
 $ENV{PWD} = $cwd;
 
 my $bin = "$apicast_bin/cli";