feat: extensions check + resolver

server/core/extensions.js

@@ -0,0 +1,21 @@
+const fs = require('fs-extra')
+const path = require('path')
+
+/* global WIKI */
+
+module.exports = {
+  ext: {},
+  async init () {
+    const extDirs = await fs.readdir(path.join(WIKI.SERVERPATH, 'modules/extensions'))
+    WIKI.logger.info(`Checking for installed optional extensions...`)
+    for (let dir of extDirs) {
+      WIKI.extensions.ext[dir] = require(path.join(WIKI.SERVERPATH, 'modules/extensions', dir, 'ext.js'))
+      const isInstalled = await WIKI.extensions.ext[dir].check()
+      if (isInstalled) {
+        WIKI.logger.info(`Optional extension ${dir} is installed. [ OK ]`)
+      } else {
+        WIKI.logger.info(`Optional extension ${dir} was not found on this system. [ SKIPPED ]`)
+      }
+    }
+  }
+}