uglifyjs binary: Make read_whole_file async and don't attempt to read STDIN synchronously.

bin/uglifyjs

@@ -7,6 +7,7 @@ var UglifyJS = require("../tools/node");
 var sys = require("util");
 var optimist = require("optimist");
 var fs = require("fs");
+var async = require("async");
 var acorn;
 var ARGS = optimist
     .usage("$0 input1.js [input2.js ...] [options]\n\
@@ -215,8 +216,12 @@ try {
     }
 }
 
-files.forEach(function(file) {
+async.eachLimit(files, 1, function (file, cb) {
-    var code = read_whole_file(file);
+    read_whole_file(file, function (err, code) {
+        if (err) {
+            sys.error("ERROR: can't read file: " + filename);
+            process.exit(1);
+        }
         if (ARGS.p != null) {
             file = file.replace(/^\/+/, "").split(/\/+/).slice(ARGS.p).join("/");
         }
@@ -241,17 +246,18 @@ files.forEach(function(file) {
                 });
             };
         });
-});
+        cb();
-
+    });
-if (ARGS.acorn || ARGS.spidermonkey) time_it("convert_ast", function(){
+}, function () {
+    if (ARGS.acorn || ARGS.spidermonkey) time_it("convert_ast", function(){
         TOPLEVEL = UglifyJS.AST_Node.from_mozilla_ast(TOPLEVEL);
-});
+    });
 
-if (ARGS.wrap) {
+    if (ARGS.wrap) {
         TOPLEVEL = TOPLEVEL.wrap_commonjs(ARGS.wrap, ARGS.export_all);
-}
+    }
 
-if (ARGS.enclose) {
+    if (ARGS.enclose) {
         var arg_parameter_list = ARGS.enclose;
 
         if (!(arg_parameter_list instanceof Array)) {
@@ -259,56 +265,56 @@ if (ARGS.enclose) {
         }
 
         TOPLEVEL = TOPLEVEL.wrap_enclose(arg_parameter_list);
-}
+    }
 
-var SCOPE_IS_NEEDED = COMPRESS || MANGLE || ARGS.lint;
+    var SCOPE_IS_NEEDED = COMPRESS || MANGLE || ARGS.lint;
 
-if (SCOPE_IS_NEEDED) {
+    if (SCOPE_IS_NEEDED) {
         time_it("scope", function(){
             TOPLEVEL.figure_out_scope({ screw_ie8: ARGS.screw_ie8 });
             if (ARGS.lint) {
                 TOPLEVEL.scope_warnings();
             }
         });
-}
+    }
 
-if (COMPRESS) {
+    if (COMPRESS) {
         time_it("squeeze", function(){
             TOPLEVEL = TOPLEVEL.transform(compressor);
         });
-}
+    }
 
-if (SCOPE_IS_NEEDED) {
+    if (SCOPE_IS_NEEDED) {
         time_it("scope", function(){
             TOPLEVEL.figure_out_scope({ screw_ie8: ARGS.screw_ie8 });
             if (MANGLE) {
                 TOPLEVEL.compute_char_frequency(MANGLE);
             }
         });
-}
+    }
 
-if (MANGLE) time_it("mangle", function(){
+    if (MANGLE) time_it("mangle", function(){
         TOPLEVEL.mangle_names(MANGLE);
-});
+    });
-time_it("generate", function(){
+    time_it("generate", function(){
         TOPLEVEL.print(output);
-});
+    });
 
-output = output.get();
+    output = output.get();
 
-if (SOURCE_MAP) {
+    if (SOURCE_MAP) {
         fs.writeFileSync(ARGS.source_map, SOURCE_MAP, "utf8");
         output += "\n/*\n//@ sourceMappingURL=" + (ARGS.source_map_url || ARGS.source_map) + "\n*/";
-}
+    }
 
-if (OUTPUT_FILE) {
+    if (OUTPUT_FILE) {
         fs.writeFileSync(OUTPUT_FILE, output, "utf8");
-} else {
+    } else {
         sys.print(output);
         sys.error("\n");
-}
+    }
 
-if (ARGS.stats) {
+    if (ARGS.stats) {
         sys.error(UglifyJS.string_template("Timing information (compressed {count} files):", {
             count: files.length
         }));
@@ -318,7 +324,8 @@ if (ARGS.stats) {
                 time: (STATS[i] / 1000).toFixed(3)
             }));
         }
-}
+    }
+});
 
 /* -----[ functions ]----- */
 
@@ -363,20 +370,18 @@ function getOptions(x, constants) {
     return ret;
 }
 
-function read_whole_file(filename) {
+function read_whole_file(filename, cb) {
-    try {
     if (filename == "-") {
         var chunks = [];
-            do {
+        process.stdin.setEncoding('utf-8');
-                var chunk = fs.readFileSync("/dev/stdin", "utf8");
+        process.stdin.on('data', function (chunk) {
             chunks.push(chunk);
-            } while (chunk.length);
+        }).on('end', function () {
-            return chunks.join("");
+            cb(null, chunks.join(""));
-        }
+        });
-        return fs.readFileSync(filename, "utf8");
+        process.openStdin();
-    } catch(ex) {
+    } else {
-        sys.error("ERROR: can't read file: " + filename);
+        fs.readFile(filename, "utf-8", cb);
-        process.exit(1);
     }
 }
 

package.json

@@ -15,8 +15,9 @@
         "url": "https://github.com/mishoo/UglifyJS2.git"
     }],
     "dependencies": {
+        "async"      : "~0.2.6",
         "source-map" : "~0.1.7",
-        "optimist"   : "~0.3.5"
+        "optimist"   : "~0.3.5",
     },
     "bin": {
         "uglifyjs" : "bin/uglifyjs"