1 files changed, 66 insertions, 0 deletions
diff --git a/lib/plugins/findInstalled.js b/lib/plugins/findInstalled.js
new file mode 100644
index 0000000..5e13c79
--- /dev/null
+++ b/lib/plugins/findInstalled.js
@@ -0,0 +1,66 @@
+var readInstalled = require('read-installed');
+var Immutable = require('immutable');
+
+var Promise = require('../utils/promise');
+var Plugin = require('../models/plugin');
+var PREFIX = require('../constants/pluginPrefix');
+
+/**
+    Validate if a package name is a GitBook plugin
+
+    @return {Boolean}
+*/
+function validateId(name) {
+    return name && name.indexOf(PREFIX) === 0;
+}
+
+
+/**
+    List all packages installed inside a folder
+
+    @param {String} folder
+    @return {OrderedMap<String:Plugin>}
+*/
+function findInstalled(folder) {
+    var options = {
+        dev: false,
+        log: function() {},
+        depth: 4
+    };
+    var results = Immutable.OrderedMap();
+
+    function onPackage(pkg, isRoot) {
+        if (!pkg.name) return;
+
+        var name = pkg.name;
+        var version = pkg.version;
+        var pkgPath = pkg.realPath;
+        var depth = pkg.depth;
+        var dependencies = pkg.dependencies;
+
+        var pluginName = name.slice(PREFIX.length);
+
+        if (!validateId(name)){
+            if (!isRoot) return;
+        } else {
+            results = results.set(pluginName, Plugin({
+                name: pluginName,
+                version: version,
+                path: pkgPath,
+                depth: depth
+            }));
+        }
+
+        Immutable.Map(dependencies).forEach(function(dep) {
+            onPackage(dep);
+        });
+    }
+
+    return Promise.nfcall(readInstalled, folder, options)
+    .then(function(data) {
+        onPackage(data, true);
+        return results;
+    });
+}
+
+module.exports = findInstalled;