From 339e85dd827651bf9659f3d9299674c6ecd63219 Mon Sep 17 00:00:00 2001
From: "Xin,Zhang" <zhangxin@apache.org>
Date: Fri, 17 Aug 2018 14:23:02 +0800
Subject: [PATCH] fetch the module version (#22)

---
 lib/require-module-hook.js | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/lib/require-module-hook.js b/lib/require-module-hook.js
index 55011cb..508bcbf 100644
--- a/lib/require-module-hook.js
+++ b/lib/require-module-hook.js
@@ -20,6 +20,7 @@
 const Module = require("module");
 const resolve = require("resolve");
 const path = require("path");
+const fs = require("fs");
 
 module.exports = hook;
 
@@ -38,7 +39,8 @@ function hook(modules, requireCallback) {
         let moduleName = "";
         let matchModuleName = "";
         let enhanceFile = "";
-        let version = "";
+        let version = undefined;
+        let basedir = undefined;
 
         if (enhancedModuleCache.hasOwnProperty(filename)) {
             return enhancedModuleCache[filename];
@@ -56,7 +58,7 @@ function hook(modules, requireCallback) {
             moduleName = isWithScope ?
                 pathSegment[index + 1] + "/" + pathSegment[index + 2] :
                 pathSegment[index + 1];
-            let basedir = pathSegment.slice(0, index + (isWithScope ? 3 : 2)).join(path.sep);
+            basedir = pathSegment.slice(0, index + (isWithScope ? 3 : 2)).join(path.sep);
             try {
                 let res = resolve.sync(moduleName, {basedir: basedir});
                 if (res !== filename) {
@@ -73,6 +75,17 @@ function hook(modules, requireCallback) {
         }
 
         if (modules && modules.indexOf(matchModuleName) === -1) return exports;
+
+        // get version. Because of we enhance Module.prototype.require, so we can't fetch the version by execute
+        // `require(basedir + path.sep + "package.json")` method
+        if (basedir) {
+            const packageJson = path.join(basedir, "package.json");
+            try {
+                version = JSON.parse(fs.readFileSync(packageJson)).version;
+            } catch (e) {
+            }
+        }
+
         if (!enhancedModuleCache.hasOwnProperty(filename)) {
             enhancedModuleCache[filename] = exports;
             enhancedModuleCache[filename] = requireCallback(exports, moduleName, version, enhanceFile);
-- 
GitLab