Fix #1102

Also fix loading plugins, the `load` function wouldn't be called correctly.

Author: Gerrit0

package-lock.json

@@ -33,7 +33,7 @@
     "@types/minimatch": "3.0.3",
     "fs-extra": "^8.1.0",
     "handlebars": "^4.5.3",
-    "highlight.js": "^9.16.2",
+    "highlight.js": "^9.17.1",
     "lodash": "^4.17.15",
     "marked": "^0.7.0",
     "minimatch": "^3.0.0",
@@ -48,7 +48,7 @@
     "@types/marked": "^0.7.2",
     "@types/mocha": "^5.2.7",
     "@types/mockery": "^1.4.29",
-    "@types/node": "^12.12.12",
+    "@types/node": "^12.12.17",
     "@types/shelljs": "^0.8.6",
     "mocha": "^6.2.2",
     "mockery": "^2.1.0",

package.json

@@ -50,7 +50,7 @@ export class PluginHost extends AbstractComponent<Application> {
                     : instance                // support legacy plugins
                     ;
                 if (typeof initFunction === 'function') {
-                    instance(this);
+                    initFunction(this);
                     logger.write('Loaded plugin %s', plugin);
                 } else {
                     logger.error('Invalid structure in plugin %s, no function found.', plugin);
@@ -98,7 +98,7 @@ export class PluginHost extends AbstractComponent<Application> {
             const candidates: string[] = [];
             FS.readdirSync(basePath).forEach((name) => {
                 const dir = Path.join(basePath, name);
-                if (name.startsWith('@')) {
+                if (name.startsWith('@') && FS.statSync(dir).isDirectory()) {
                     FS.readdirSync(dir).forEach((n) => {
                         candidates.push(Path.join(name, n));
                     });