Guarantee stdout/stderr flush upon process.exit()

Fixes #1055

bin/uglifyjs

@@ -9,6 +9,7 @@ var yargs = require("yargs");
 var fs = require("fs");
 var path = require("path");
 var async = require("async");
+var exit = require("exit");
 var acorn;
 var ARGS = yargs
     .usage("$0 input1.js [input2.js ...] [options]\n\
@@ -144,18 +145,18 @@ if (ARGS.noerr) {
 if (ARGS.version || ARGS.V) {
     var json = require("../package.json");
     print(json.name + ' ' + json.version);
-    process.exit(0);
+    exit(0);
 }
 
 if (ARGS.ast_help) {
     var desc = UglifyJS.describe_ast();
     print(typeof desc == "string" ? desc : JSON.stringify(desc, null, 2));
-    process.exit(0);
+    exit(0);
 }
 
 if (ARGS.h || ARGS.help) {
     print(yargs.help());
-    process.exit(0);
+    exit(0);
 }
 
 if (ARGS.acorn) {
@@ -283,12 +284,12 @@ if (files.length == 0) {
 
 if (files.indexOf("-") >= 0 && ARGS.source_map) {
     print_error("ERROR: Source map doesn't work with input from STDIN");
-    process.exit(1);
+    exit(1);
 }
 
 if (files.filter(function(el){ return el == "-" }).length > 1) {
     print_error("ERROR: Can read a single file from STDIN (two or more dashes specified)");
-    process.exit(1);
+    exit(1);
 }
 
 var STATS = {};
@@ -313,7 +314,7 @@ try {
         print_error(ex.msg);
         print_error("Supported options:");
         print_error(sys.inspect(ex.defs));
-        process.exit(1);
+        exit(1);
     }
 }
 
@@ -321,7 +322,7 @@ async.eachLimit(files, 1, function (file, cb) {
     read_whole_file(file, function (err, code) {
         if (err) {
             print_error("ERROR: can't read file: " + file);
-            process.exit(1);
+            exit(1);
         }
         if (ARGS.p != null) {
             if (P_RELATIVE) {
@@ -360,7 +361,7 @@ async.eachLimit(files, 1, function (file, cb) {
                         print_error("Parse error at " + file + ":" + ex.line + "," + ex.col);
                         print_error(ex.message);
                         print_error(ex.stack);
-                        process.exit(1);
+                        exit(1);
                     }
                     throw ex;
                 }
@@ -397,7 +398,7 @@ async.eachLimit(files, 1, function (file, cb) {
           regex = ARGS.mangle_regex ? extractRegex(ARGS.mangle_regex) : null;
         } catch (e) {
             print_error("ERROR: Invalid --mangle-regex: " + e.message);
-            process.exit(1);
+            exit(1);
         }
 
         TOPLEVEL = UglifyJS.mangle_properties(TOPLEVEL, {
@@ -512,7 +513,7 @@ function getOptions(flag, constants) {
         } catch(ex) {
             if (ex instanceof UglifyJS.JS_Parse_Error) {
                 print_error("Error parsing arguments for flag `" + flag + "': " + x);
-                process.exit(1);
+                exit(1);
             }
         }
         ast.walk(new UglifyJS.TreeWalker(function(node){
@@ -532,7 +533,7 @@ function getOptions(flag, constants) {
             }
             print_error(node.TYPE)
             print_error("Error parsing arguments for flag `" + flag + "': " + x);
-            process.exit(1);
+            exit(1);
         }));
     }
     return ret;

package.json

@@ -30,6 +30,7 @@
   ],
   "dependencies": {
     "async": "~0.2.6",
+    "exit": "~0.1.2",
     "source-map": "~0.5.1",
     "uglify-to-browserify": "~1.0.0",
     "yargs": "~3.10.0"

test/mocha.js

@@ -1,6 +1,7 @@
 var Mocha = require('mocha'),
     fs = require('fs'),
-    path = require('path');
+    path = require('path'),
+    exit = require('exit');
 
 // Instantiate a Mocha instance.
 var mocha = new Mocha({});
@@ -22,7 +23,7 @@ module.exports = function() {
     mocha.run(function(failures) {
         if (failures !== 0) {
             process.on('exit', function () {
-                process.exit(failures);
+                exit(failures);
             });
         }
     });

test/run-tests.js

@@ -4,6 +4,7 @@ var U = require("../tools/node");
 var path = require("path");
 var fs = require("fs");
 var assert = require("assert");
+var exit = require("exit");
 
 var tests_dir = path.dirname(module.filename);
 var failures = 0;
@@ -13,7 +14,7 @@ run_compress_tests();
 if (failures) {
     console.error("\n!!! Failed " + failures + " test cases.");
     console.error("!!! " + Object.keys(failed_files).join(", "));
-    process.exit(1);
+    exit(1);
 }
 
 var mocha_tests = require("./mocha.js");