1 files changed, 91 insertions, 0 deletions
diff --git a/packages/gitbook/src/plugins/findInstalled.js b/packages/gitbook/src/plugins/findInstalled.js
new file mode 100644
index 0000000..15556b6
--- /dev/null
+++ b/packages/gitbook/src/plugins/findInstalled.js
@@ -0,0 +1,91 @@
+const readInstalled = require('read-installed');
+const Immutable = require('immutable');
+const path = require('path');
+
+const Promise = require('../utils/promise');
+const fs = require('../utils/fs');
+const Plugin = require('../models/plugin');
+const 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) {
+    const options = {
+        dev: false,
+        log() {},
+        depth: 4
+    };
+    let results = Immutable.OrderedMap();
+
+    function onPackage(pkg, parent) {
+        if (!pkg.name) return;
+
+        const name = pkg.name;
+        const version = pkg.version;
+        const pkgPath = pkg.realPath;
+        const depth = pkg.depth;
+        const dependencies = pkg.dependencies;
+
+        const pluginName = name.slice(PREFIX.length);
+
+        if (!validateId(name)) {
+            if (parent) return;
+        } else {
+            results = results.set(pluginName, Plugin({
+                name: pluginName,
+                version,
+                path: pkgPath,
+                depth,
+                parent
+            }));
+        }
+
+        Immutable.Map(dependencies).forEach(function(dep) {
+            onPackage(dep, pluginName);
+        });
+    }
+
+    // Search for gitbook-plugins in node_modules folder
+    const node_modules = path.join(folder, 'node_modules');
+
+    // List all folders in node_modules
+    return fs.readdir(node_modules)
+    .fail(function() {
+        return Promise([]);
+    })
+    .then(function(modules) {
+        return Promise.serie(modules, function(module) {
+            // Not a gitbook-plugin
+            if (!validateId(module)) {
+                return Promise();
+            }
+
+            // Read gitbook-plugin package details
+            const module_folder = path.join(node_modules, module);
+            return Promise.nfcall(readInstalled, module_folder, options)
+            .then(function(data) {
+                onPackage(data);
+            });
+        });
+    })
+    .then(function() {
+        // Return installed plugins
+        return results;
+    });
+}
+
+module.exports = findInstalled;