refactor: optimized engines directory retrieval #1359 (#1364)

* refactor: replacing existing way to retrieve the actual node_directory

especially for npm workspaces usage (aka npm 7 monorepos)

* refactor: outputting the engines directory path as well for debugging

* fix: we'll still need the process.cwd entry

especially for development in the PL codebase itself

Co-authored-by: Josef Bredreck <[email protected]>
Co-authored-by: Josef Bredreck <[email protected]>

Author: mfranzke

packages/core/src/lib/pattern_engines.js

@@ -9,6 +9,8 @@ const engineMatcher = /^engine-(.*)$/;
 
 const logger = require('./log');
 
+const { resolvePackageFolder } = require('@pattern-lab/core/src/lib/resolver');
+
 const enginesDirectories = [
   {
     displayName: 'the core',
@@ -18,6 +20,10 @@ const enginesDirectories = [
     displayName: 'the edition or test directory',
     path: path.join(process.cwd(), 'node_modules'),
   },
+  {
+    displayName: 'the general node_modules directory',
+    path: path.resolve(resolvePackageFolder('@pattern-lab/core'), '..', '..'),
+  },
 ];
 
 /**
@@ -87,7 +93,9 @@ const PatternEngines = Object.create({
         engineDirectory.path
       );
 
-      logger.debug(`Loading engines from ${engineDirectory.displayName}...`);
+      logger.debug(
+        `Loading engines from ${engineDirectory.displayName}: ${engineDirectory.path} ...`
+      );
 
       // find all engine-named things in this directory and try to load them,
       // unless it's already been loaded.