v3.0.13

- remove duplicated functionalities
- fix similar issue with `else`

README.md

@@ -45,6 +45,7 @@ a double dash to prevent input files being used as option arguments:
 
 ```
     -h, --help                  Print usage information.
+                                `--help options` for details on available options.
     -V, --version               Print version number.
     -p, --parse <options>       Specify parser options:
                                 `acorn`  Use Acorn for parsing.
@@ -713,14 +714,14 @@ UglifyJS.minify(code, { mangle: { toplevel: true } }).code;
 
 ### Mangle properties options
 
-- `reserved` (default: `[]`) -- Do not mangle property names listed in the 
+- `reserved` (default: `[]`) -- Do not mangle property names listed in the
   `reserved` array.
 - `regex` (default: `null`) -— Pass a RegExp literal to only mangle property
   names matching the regular expression.
 - `keep_quoted` (default: `false`) -— Only mangle unquoted property names.
 - `debug` (default: `false`) -— Mangle names with the original name still present.
   Pass an empty string `""` to enable, or a non-empty string to set the debug suffix.
-- `builtins` (default: `false`) -- Use `true` to allow the mangling of builtin 
+- `builtins` (default: `false`) -- Use `true` to allow the mangling of builtin
   DOM properties. Not recommended to override this setting.
 
 ## Output options

bin/uglifyjs

@@ -21,10 +21,27 @@ var options = {
     compress: false,
     mangle: false
 };
-program.version(info.name + ' ' + info.version);
+program.version(info.name + " " + info.version);
 program.parseArgv = program.parse;
 program.parse = undefined;
 if (process.argv.indexOf("ast") >= 0) program.helpInformation = UglifyJS.describe_ast;
+else if (process.argv.indexOf("options") >= 0) program.helpInformation = function() {
+    var text = [];
+    var options = UglifyJS.default_options();
+    for (var option in options) {
+        text.push("--" + (option == "output" ? "beautify" : option == "sourceMap" ? "source-map" : option) + " options:");
+        var defs = options[option];
+        var padding = "";
+        Object.keys(defs).map(function(name) {
+            if (padding.length < name.length) padding = Array(name.length + 1).join(" ");
+            return [ name, JSON.stringify(defs[name]) ];
+        }).forEach(function(tokens) {
+            text.push("  " + tokens[0] + padding.slice(tokens[0].length - 2) + tokens[1]);
+        });
+        text.push("");
+    }
+    return text.join("\n");
+};
 program.option("-p, --parse <options>", "Specify parser options.", parse_js("parse", true));
 program.option("-c, --compress [options]", "Enable compressor/specify compressor options.", parse_js("compress", true));
 program.option("-m, --mangle [options]", "Mangle names/specify mangler options.", parse_js("mangle", true));
@@ -351,7 +368,7 @@ function parse_js(flag, constants) {
                 }
             }));
         } catch(ex) {
-            fatal("Error parsing arguments for '" + flag + "': " + value);
+            options[value] = null;
         }
         return options;
     }

lib/compress.js

@@ -924,6 +924,45 @@ merge(Compressor.prototype, {
                     // step.  nevertheless, it's good to check.
                     continue loop;
                   case stat instanceof AST_If:
+                    var ab = aborts(stat.body);
+                    if (can_merge_flow(ab)) {
+                        if (ab.label) {
+                            remove(ab.label.thedef.references, ab);
+                        }
+                        CHANGED = true;
+                        var funs = extract_functions_from_statement_array(ret);
+                        var body = as_statement_array_with_return(stat.body, ab);
+                        stat = stat.clone();
+                        stat.condition = stat.condition.negate(compressor);
+                        stat.body = make_node(AST_BlockStatement, stat, {
+                            body: as_statement_array(stat.alternative).concat(ret)
+                        });
+                        stat.alternative = make_node(AST_BlockStatement, stat, {
+                            body: body
+                        });
+                        ret = [ stat.transform(compressor) ].concat(funs);
+                        continue loop;
+                    }
+
+                    var ab = aborts(stat.alternative);
+                    if (can_merge_flow(ab)) {
+                        if (ab.label) {
+                            remove(ab.label.thedef.references, ab);
+                        }
+                        CHANGED = true;
+                        var funs = extract_functions_from_statement_array(ret);
+                        stat = stat.clone();
+                        stat.body = make_node(AST_BlockStatement, stat.body, {
+                            body: as_statement_array(stat.body).concat(ret)
+                        });
+                        var body = as_statement_array_with_return(stat.alternative, ab);
+                        stat.alternative = make_node(AST_BlockStatement, stat.alternative, {
+                            body: body
+                        });
+                        ret = [ stat.transform(compressor) ].concat(funs);
+                        continue loop;
+                    }
+
                     if (stat.body instanceof AST_Return) {
                         var value = stat.body.value;
                         //---
@@ -960,23 +999,6 @@ merge(Compressor.prototype, {
                             continue loop;
                         }
                         //---
-                        // if (foo()) return [ void bar() ]; [ else x...; ] y... ==> if (!foo()) { x...; y... } else bar();
-                        if (in_lambda && (!value || value instanceof AST_UnaryPrefix && value.operator == "void")) {
-                            CHANGED = true;
-                            stat = stat.clone();
-                            stat.condition = stat.condition.negate(compressor);
-                            var funs = extract_functions_from_statement_array(ret);
-                            var body = as_statement_array(stat.alternative).concat(ret);
-                            stat.body = make_node(AST_BlockStatement, stat, {
-                                body: body
-                            });
-                            stat.alternative = value ? make_node(AST_SimpleStatement, value, {
-                                body: value.expression
-                            }) : null;
-                            ret = [ stat.transform(compressor) ].concat(funs);
-                            continue loop;
-                        }
-                        //---
                         // if (a) return b; if (c) return d; e; ==> return a ? b : c ? d : void e;
                         //
                         // if sequences is not enabled, this can lead to an endless loop (issue #866).
@@ -995,48 +1017,6 @@ merge(Compressor.prototype, {
                         }
                     }
 
-                    var ab = aborts(stat.body);
-                    var lct = ab instanceof AST_LoopControl ? compressor.loopcontrol_target(ab) : null;
-                    if (ab && ((ab instanceof AST_Return && !ab.value && in_lambda)
-                               || (ab instanceof AST_Continue && self === loop_body(lct))
-                               || (ab instanceof AST_Break && lct instanceof AST_BlockStatement && self === lct))) {
-                        if (ab.label) {
-                            remove(ab.label.thedef.references, ab);
-                        }
-                        CHANGED = true;
-                        var body = as_statement_array(stat.body).slice(0, -1);
-                        stat = stat.clone();
-                        stat.condition = stat.condition.negate(compressor);
-                        stat.body = make_node(AST_BlockStatement, stat, {
-                            body: as_statement_array(stat.alternative).concat(ret)
-                        });
-                        stat.alternative = make_node(AST_BlockStatement, stat, {
-                            body: body
-                        });
-                        ret = [ stat.transform(compressor) ];
-                        continue loop;
-                    }
-
-                    var ab = aborts(stat.alternative);
-                    var lct = ab instanceof AST_LoopControl ? compressor.loopcontrol_target(ab) : null;
-                    if (ab && ((ab instanceof AST_Return && !ab.value && in_lambda)
-                               || (ab instanceof AST_Continue && self === loop_body(lct))
-                               || (ab instanceof AST_Break && lct instanceof AST_BlockStatement && self === lct))) {
-                        if (ab.label) {
-                            remove(ab.label.thedef.references, ab);
-                        }
-                        CHANGED = true;
-                        stat = stat.clone();
-                        stat.body = make_node(AST_BlockStatement, stat.body, {
-                            body: as_statement_array(stat.body).concat(ret)
-                        });
-                        stat.alternative = make_node(AST_BlockStatement, stat.alternative, {
-                            body: as_statement_array(stat.alternative).slice(0, -1)
-                        });
-                        ret = [ stat.transform(compressor) ];
-                        continue loop;
-                    }
-
                     ret.unshift(stat);
                     break;
                   default:
@@ -1056,6 +1036,28 @@ merge(Compressor.prototype, {
                 }
                 return false;
             }
+
+            function is_return_void(value) {
+                return !value || value instanceof AST_UnaryPrefix && value.operator == "void";
+            }
+
+            function can_merge_flow(ab) {
+                if (!ab) return false;
+                var lct = ab instanceof AST_LoopControl ? compressor.loopcontrol_target(ab) : null;
+                return ab instanceof AST_Return && in_lambda && is_return_void(ab.value)
+                    || ab instanceof AST_Continue && self === loop_body(lct)
+                    || ab instanceof AST_Break && lct instanceof AST_BlockStatement && self === lct;
+            }
+
+            function as_statement_array_with_return(node, ab) {
+                var body = as_statement_array(node).slice(0, -1);
+                if (ab.value) {
+                    body.push(make_node(AST_SimpleStatement, ab.value, {
+                        body: ab.value.expression
+                    }));
+                }
+                return body;
+            }
         };
 
         function eliminate_dead_code(statements, compressor) {

lib/parse.js

@@ -700,7 +700,7 @@ function parse($TEXT, options) {
         shebang        : true,
         strict         : false,
         toplevel       : null,
-    });
+    }, true);
 
     var S = {
         input         : (typeof $TEXT == "string"

package.json

@@ -4,7 +4,7 @@
   "homepage": "http://lisperator.net/uglifyjs",
   "author": "Mihai Bazon <mihai.bazon@gmail.com> (http://lisperator.net/)",
   "license": "BSD-2-Clause",
-  "version": "3.0.12",
+  "version": "3.0.13",
   "engines": {
     "node": ">=0.8.0"
   },

test/compress/dead-code.js

@@ -99,7 +99,7 @@ dead_code_2_should_warn_strict: {
         f();
     }
     expect_stdout: true
-    node_version: "=4"
+    node_version: ">=4"
 }
 
 dead_code_constant_boolean_should_warn_more: {

test/compress/functions.js

@@ -243,5 +243,5 @@ hoist_funs_strict: {
         "5 'function' 'function'",
         "6 'undefined' 'function'",
     ]
-    node_version: "=4"
+    node_version: ">=4"
 }

test/compress/if_return.js

@@ -307,6 +307,8 @@ issue_512: {
     options = {
         conditionals: true,
         if_return: true,
+        sequences: true,
+        side_effects: true,
     }
     input: {
         function a() {

test/compress/issue-1052.js

@@ -136,7 +136,29 @@ defun_hoist_funs: {
             function f() {}
             function g() {}
             function h() {}
-            !window;
+            if (window);
+        }
+    }
+}
+
+defun_else_if_return: {
+    options = {
+        hoist_funs: false,
+        if_return: true,
+    }
+    input: {
+        function e() {
+            function f() {}
+            if (window) function g() {}
+            else return;
+            function h() {}
+        }
+    }
+    expect: {
+        function e() {
+            function f() {}
+            if (window) function g() {}
+            function h() {}
         }
     }
 }

test/mocha/cli.js

@@ -537,4 +537,13 @@ describe("bin/uglifyjs", function () {
             done();
         });
     });
+    it("Should print supported options on invalid option syntax", function(done) {
+        var command = uglifyjscmd + " test/input/comments/filter.js -b ascii-only";
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.ok(/^Supported options:\n\{[^}]+}\nERROR: `ascii-only` is not a supported option/.test(stderr), stderr);
+            done();
+        });
+    });
 });

test/ufuzz.js

@@ -12,7 +12,7 @@
         stream._handle.setBlocking(true);
 });
 
-var UglifyJS = require("./node");
+var UglifyJS = require("..");
 var randomBytes = require("crypto").randomBytes;
 var sandbox = require("./sandbox");
 
@@ -962,32 +962,15 @@ function try_beautify(code, result) {
     console.log(code);
 }
 
-function infer_options(ctor) {
+var default_options = UglifyJS.default_options();
-    try {
-        ctor({ 0: 0 });
-    } catch (e) {
-        return e.defs;
-    }
-}
-
-var default_options = {
-    compress: infer_options(UglifyJS.Compressor),
-    mangle: {
-        "cache": null,
-        "eval": false,
-        "ie8": false,
-        "keep_fnames": false,
-        "toplevel": false,
-    },
-    output: infer_options(UglifyJS.OutputStream),
-};
 
 function log_suspects(minify_options, component) {
     var options = component in minify_options ? minify_options[component] : true;
     if (!options) return;
-    options = UglifyJS.defaults(options, default_options[component]);
+    if (typeof options != "object") options = {};
-    var suspects = Object.keys(default_options[component]).filter(function(name) {
+    var defs = default_options[component];
-        if (options[name]) {
+    var suspects = Object.keys(defs).filter(function(name) {
+        if ((name in options ? options : defs)[name]) {
             var m = JSON.parse(JSON.stringify(minify_options));
             var o = JSON.parse(JSON.stringify(options));
             o[name] = false;

tools/node.js

@@ -63,3 +63,20 @@ function describe_ast() {
     doitem(AST_Node);
     return out + "\n";
 }
+
+function infer_options(options) {
+    var result = UglifyJS.minify("", options);
+    return result.error && result.error.defs;
+}
+
+UglifyJS.default_options = function() {
+    var defs = {};
+    Object.keys(infer_options({ 0: 0 })).forEach(function(component) {
+        var options = {};
+        options[component] = { 0: 0 };
+        if (options = infer_options(options)) {
+            defs[component] = options;
+        }
+    });
+    return defs;
+};