From 72d182d4fd047d35fed15c6ae2abb418ab077fbf Mon Sep 17 00:00:00 2001
From: Eugene Zaretskiy <eugene.zar@gmail.com>
Date: Fri, 10 Mar 2017 21:03:34 -0800
Subject: [PATCH] Fixes #147 , revision numbers removed, hash always present

---
 package.json                  |  3 ++-
 src/browserify-plugin/main.js | 16 +++++++++++++---
 src/reloading.js              | 31 ++++---------------------------
 3 files changed, 19 insertions(+), 31 deletions(-)

diff --git a/package.json b/package.json
index a7f546c..b746ab7 100644
--- a/package.json
+++ b/package.json
@@ -29,8 +29,9 @@
   "dependencies": {
     "cli-color": "1.1.0",
     "convert-source-map": "1.3.0",
+    "crc": "3.4.4",
+    "left-pad": "1.1.3",
     "lodash": "4.17.4",
-    "md5": "2.2.1",
     "offset-sourcemap-lines": "1.0.0",
     "through2": "2.0.3",
     "umd": "3.0.1",
diff --git a/src/browserify-plugin/main.js b/src/browserify-plugin/main.js
index e2a52e8..cedbb81 100644
--- a/src/browserify-plugin/main.js
+++ b/src/browserify-plugin/main.js
@@ -1,11 +1,12 @@
 import _ from "lodash"
 import umd from "umd"
 import through from "through2"
-import md5 from "md5"
+import crc from "crc"
 import {readFileSync} from "fs"
 import {resolve} from "path"
 import convertSourceMaps from 'convert-source-map'
 import offsetSourceMaps from 'offset-sourcemap-lines'
+import leftPad from 'left-pad'
 import {startServer} from "./server"
 import {log} from "./console"
 import loader from "../reloading"
@@ -107,11 +108,13 @@ function LiveReactloadPlugin(b, opts = {}) {
         let hash;
 
         if (converter) {
+          const sources = converter.getProperty("sources") || [];
           sourceWithoutMaps = convertSourceMaps.removeComments(source)
-          hash = md5(sourceWithoutMaps)
+          hash = getHash(sourceWithoutMaps)
+          converter.setProperty("sources", sources.map(source => source += "?version=" + hash))
           adjustedSourcemap = convertSourceMaps.fromObject(offsetSourceMaps(converter.toObject(), 1)).toComment()
         } else {
-          hash = md5(source)
+          hash = getHash(source)
         }
 
         if (entry) {
@@ -171,6 +174,13 @@ function LiveReactloadPlugin(b, opts = {}) {
   function throws(msg) {
     throw new Error(msg)
   }
+
+  function getHash(data) {
+    const crcHash = leftPad(crc.crc32(data).toString(16), 8, "0")
+    return new Buffer(crcHash, "hex")
+        .toString("base64")
+        .replace(/=/g,"")
+  }
 }
 
 module.exports = LiveReactloadPlugin
diff --git a/src/reloading.js b/src/reloading.js
index 55a6c51..8c5d9b4 100644
--- a/src/reloading.js
+++ b/src/reloading.js
@@ -17,7 +17,7 @@
  *          ...
  *        },
  *        {
- *          hash: "md5_hash_from_source",
+ *          hash: "32bit_hash_from_source",
  *          isEntry: true|false
  *        }
  *      ],
@@ -42,7 +42,6 @@ function loader(mappings, entryPoints, options) {
 
   var scope = {
     mappings: mappings,
-    revNums: {},
     cache: {},
     reloading: false,
     reloadHooks: {},
@@ -81,10 +80,10 @@ function loader(mappings, entryPoints, options) {
     }
   }
 
-  function compile(mapping, revision) {
+  function compile(mapping) {
     var body = mapping[0];
     if (typeof body !== "function") {
-      debug("Compiling module", mapping[2], "[revision " + revision + " ]")
+      debug("Compiling module", mapping[2])
       var compiled = compileModule(body, mapping[2].sourcemap);
       mapping[0] = compiled;
       mapping[2].source = body;
@@ -163,34 +162,12 @@ function loader(mappings, entryPoints, options) {
       var mapping = mappings[id];
       var meta = mapping[2];
       if (!old || old[2].hash !== meta.hash) {
-        var rev = scope.revNums[id] ? ++scope.revNums[id] : (scope.revNums[id] = 1);
-        if (old && meta.sourcemap) {
-          addVersionToSourceMap(meta, rev);
-        }
-        compile(mapping, rev);
+        compile(mapping);
         scope.mappings[id] = mapping;
         changes.push([id, old]);
       }
     });
     return changes;
-
-    // Updates the source map by adding a revision parameter to the filename.
-    // Without this new filename, browsers will ignore the updated source map.
-    function addVersionToSourceMap(meta, revision) {
-      var comment = meta.sourcemap
-        .replace(/^\/\*/g, '//')
-        .replace(/\*\/$/g, '');
-      // decode sourcemap comment and add hash param
-      comment = comment.split(',').pop();
-      var sourcemap = JSON.parse(atob(comment));
-      for (var i = 0; i < sourcemap.sources.length; i++) {
-        sourcemap.sources[i] += "?rev=" + revision;
-      }
-      // re-encode to sourcemap comment
-      comment = btoa(JSON.stringify(sourcemap));
-      comment = '//# sourceMappingURL=data:application/json;base64,' + comment;
-      meta.sourcemap = comment;
-    }
   }
 
   /**