Add an option for writing inline source map

README.md

@@ -62,6 +62,7 @@ The available options are:
   --source-map-include-sources  Pass this flag if you want to include the
                                 content of source files in the source map as
                                 sourcesContent property.
+  --source-map-inline           Write base64-encoded source map to the end of js output.
   --in-source-map               Input source map, useful if you're compressing
                                 JS that was generated from some other original
                                 code.
@@ -641,7 +642,9 @@ var result = UglifyJS.minify({"file1.js": "var a = function () {};"}, {
 
 Note that the source map is not saved in a file, it's just returned in
 `result.map`.  The value passed for `outSourceMap` is only used to set the
-`file` attribute in the source map (see [the spec][sm-spec]).
+`file` attribute in the source map (see [the spec][sm-spec]). You can set 
+option `sourceMapInline` to be `true` and source map will be appended to 
+code.
 
 You can also specify sourceRoot property to be included in source map:
 ```javascript

bin/uglifyjs

@@ -23,6 +23,7 @@ mangling you need to use `-c` and `-m`.\
     .describe("source-map", "Specify an output file where to generate source map.")
     .describe("source-map-root", "The path to the original source to be included in the source map.")
     .describe("source-map-url", "The path to the source map to be added in //# sourceMappingURL.  Defaults to the value passed with --source-map.")
+    .describe("source-map-inline", "Write base64-encoded source map to the end of js output.  Disabled by default")
     .describe("source-map-include-sources", "Pass this flag if you want to include the content of source files in the source map as sourcesContent property.")
     .describe("in-source-map", "Input source map, useful if you're compressing JS that was generated from some other original code.")
     .describe("screw-ie8", "Do not support Internet Explorer 6-8 quirks. This flag is enabled by default.")
@@ -113,6 +114,7 @@ You need to pass an argument to this option to specify the name that your module
     .array("pure-funcs")
 
     .boolean("expr")
+    .boolean("source-map-inline")
     .boolean("source-map-include-sources")
     .boolean("screw-ie8")
     .boolean("support-ie8")
@@ -309,7 +311,7 @@ var TOPLEVEL = null;
 var P_RELATIVE = ARGS.p && ARGS.p == "relative";
 var SOURCES_CONTENT = {};
 
-var SOURCE_MAP = ARGS.source_map ? UglifyJS.SourceMap({
+var SOURCE_MAP = (ARGS.source_map || ARGS.source_map_inline) ? UglifyJS.SourceMap({
     file: P_RELATIVE ? path.relative(path.dirname(ARGS.source_map), OUTPUT_FILE) : OUTPUT_FILE,
     root: ARGS.source_map_root,
     orig: ORIG_MAP,
@@ -474,13 +476,18 @@ async.eachLimit(files, 1, function (file, cb) {
         output = output.get();
 
         if (SOURCE_MAP) {
-            fs.writeFileSync(ARGS.source_map, SOURCE_MAP, "utf8");
+            if (ARGS.source_map_inline) {
-            var source_map_url = ARGS.source_map_url || (
+                var base64_string = new Buffer(SOURCE_MAP.toString()).toString('base64');
-                P_RELATIVE
+                output += "\n//# sourceMappingURL=data:application/json;charset=utf-8;base64," + base64_string;
-                    ? path.relative(path.dirname(OUTPUT_FILE), ARGS.source_map)
+            } else {
-                    : ARGS.source_map
+                fs.writeFileSync(ARGS.source_map, SOURCE_MAP, "utf8");
-            );
+                var source_map_url = ARGS.source_map_url || (
-            output += "\n//# sourceMappingURL=" + source_map_url;
+                    P_RELATIVE
+                        ? path.relative(path.dirname(OUTPUT_FILE), ARGS.source_map)
+                        : ARGS.source_map
+                );
+                output += "\n//# sourceMappingURL=" + source_map_url;
+            }
         }
 
         if (OUTPUT_FILE) {

tools/node.js

@@ -44,6 +44,7 @@ exports.minify = function(files, options) {
         sourceRoot       : null,
         inSourceMap      : null,
         sourceMapUrl     : null,
+        sourceMapInline  : false,
         fromString       : false,
         warnings         : false,
         mangle           : {},
@@ -117,7 +118,7 @@ exports.minify = function(files, options) {
     if (typeof options.inSourceMap == "string") {
         inMap = JSON.parse(fs.readFileSync(options.inSourceMap, "utf8"));
     }
-    if (options.outSourceMap) {
+    if (options.outSourceMap || options.sourceMapInline) {
         output.source_map = UglifyJS.SourceMap({
             file: options.outSourceMap,
             orig: inMap,
@@ -138,16 +139,19 @@ exports.minify = function(files, options) {
     var stream = UglifyJS.OutputStream(output);
     toplevel.print(stream);
 
-    var mappingUrlPrefix = "\n//# sourceMappingURL=";
-    if (options.outSourceMap && typeof options.outSourceMap === "string" && options.sourceMapUrl !== false) {
-        stream += mappingUrlPrefix + (typeof options.sourceMapUrl === "string" ? options.sourceMapUrl : options.outSourceMap);
-    }
 
     var source_map = output.source_map;
     if (source_map) {
         source_map = source_map + "";
     }
 
+    var mappingUrlPrefix = "\n//# sourceMappingURL=";
+    if (options.sourceMapInline) {
+        stream += mappingUrlPrefix + "data:application/json;charset=utf-8;base64," + new Buffer(source_map).toString("base64");
+    } else if (options.outSourceMap && typeof options.outSourceMap === "string" && options.sourceMapUrl !== false) {
+        stream += mappingUrlPrefix + (typeof options.sourceMapUrl === "string" ? options.sourceMapUrl : options.outSourceMap);
+    }
+
     return {
         code : stream + "",
         map  : source_map