Make CommonJS the default (and some default "exclude" values).

src/compiler/checker.ts

@@ -49,7 +49,7 @@ namespace ts {
 
         const compilerOptions = host.getCompilerOptions();
         const languageVersion = compilerOptions.target || ScriptTarget.ES3;
-        const modulekind = compilerOptions.module ? compilerOptions.module : languageVersion === ScriptTarget.ES6 ? ModuleKind.ES6 : ModuleKind.None;
+        const modulekind = getEmitModuleKind(compilerOptions);
         const allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ModuleKind.System;
 
         const emitResolver = createResolver();

src/compiler/commandLineParser.ts

@@ -78,6 +78,7 @@ namespace ts {
             name: "module",
             shortName: "m",
             type: {
+                "none": ModuleKind.None,
                 "commonjs": ModuleKind.CommonJS,
                 "amd": ModuleKind.AMD,
                 "system": ModuleKind.System,
@@ -87,7 +88,7 @@ namespace ts {
             },
             description: Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
             paramType: Diagnostics.KIND,
-            error: Diagnostics.Argument_for_module_option_must_be_commonjs_amd_system_umd_or_es2015
+            error: Diagnostics.Argument_for_module_option_must_be_commonjs_amd_system_umd_es2015_or_none
         },
         {
             name: "newLine",
@@ -525,7 +526,21 @@ namespace ts {
             }
             else {
                 const filesSeen: Map<boolean> = {};
-                const exclude = json["exclude"] instanceof Array ? map(<string[]>json["exclude"], normalizeSlashes) : undefined;
+
+                let exclude: string[] = [];
+                if (json["exclude"] instanceof Array) {
+                    exclude = json["exclude"];
+                }
+                else {
+                    // by default exclude node_modules, and any specificied output directory
+                    exclude = ["node_modules"];
+                    const outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
+                    if (outDir) {
+                        exclude.push(outDir);
+                    }
+                }
+                exclude = map(exclude, normalizeSlashes);
+
                 const supportedExtensions = getSupportedExtensions(options);
                 Debug.assert(indexOf(supportedExtensions, ".ts") < indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
 
@@ -539,6 +554,11 @@ namespace ts {
                             continue;
                         }
 
+                        // Skip over any minified JavaScript files (ending in ".min.js")
+                        if (/\.min\.js$/.test(fileName)) {
+                            continue;
+                        }
+
                         // If this is one of the output extension (which would be .d.ts and .js if we are allowing compilation of js files)
                         // do not include this file if we included .ts or .tsx file with same base name as it could be output of the earlier compilation
                         if (extension === ".d.ts" || (options.allowJs && contains(supportedJavascriptExtensions, extension))) {
@@ -562,7 +582,6 @@ namespace ts {
         const errors: Diagnostic[] = [];
 
         if (configFileName && getBaseFileName(configFileName) === "jsconfig.json") {
-            options.module = ModuleKind.CommonJS;
             options.allowJs = true;
         }
 

src/compiler/diagnosticMessages.json

@@ -439,7 +439,7 @@
         "category": "Error",
         "code": 1147
     },
-    "Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.": {
+    "Cannot compile modules unless the '--module' flag is provided with a valid module type. Consider setting the 'module' compiler option in a 'tsconfig.json' file.": {
         "category": "Error",
         "code": 1148
     },
@@ -2171,7 +2171,7 @@
         "category": "Error",
         "code": 5059
     },
-
+
 
     "Concatenate and emit output to single file.": {
         "category": "Message",
@@ -2305,7 +2305,7 @@
         "category": "Error",
         "code": 6045
     },
-    "Argument for '--module' option must be 'commonjs', 'amd', 'system', 'umd', or 'es2015'.": {
+    "Argument for '--module' option must be 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'none'.": {
         "category": "Error",
         "code": 6046
     },

src/compiler/program.ts

@@ -1290,7 +1290,7 @@ namespace ts {
 
             const firstExternalModuleSourceFile = forEach(files, f => isExternalModule(f) ? f : undefined);
             if (options.isolatedModules) {
-                if (!options.module && languageVersion < ScriptTarget.ES6) {
+                if (options.module === ModuleKind.None && languageVersion < ScriptTarget.ES6) {
                     programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
                 }
 
@@ -1300,10 +1300,10 @@ namespace ts {
                     programDiagnostics.add(createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
                 }
             }
-            else if (firstExternalModuleSourceFile && languageVersion < ScriptTarget.ES6 && !options.module) {
+            else if (firstExternalModuleSourceFile && languageVersion < ScriptTarget.ES6 && options.module === ModuleKind.None) {
                 // We cannot use createDiagnosticFromNode because nodes do not have parents yet
                 const span = getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, Diagnostics.Cannot_compile_modules_unless_the_module_flag_is_provided_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file));
+                programDiagnostics.add(createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, Diagnostics.Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file));
             }
 
             // Cannot specify module gen target of es6 when below es6

src/compiler/tsc.ts

@@ -376,7 +376,7 @@ namespace ts {
                 sys.exit(ExitStatus.DiagnosticsPresent_OutputsSkipped);
                 return;
             }
-            const configParseResult = parseJsonConfigFileContent(configObject, sys, getDirectoryPath(configFileName), commandLine.options);
+            const configParseResult = parseJsonConfigFileContent(configObject, sys, getDirectoryPath(configFileName), commandLine.options, configFileName);
             if (configParseResult.errors.length > 0) {
                 reportDiagnostics(configParseResult.errors, /* compilerHost */ undefined);
                 sys.exit(ExitStatus.DiagnosticsPresent_OutputsSkipped);

src/compiler/utilities.ts

@@ -2011,9 +2011,9 @@ namespace ts {
     }
 
     export function getEmitModuleKind(compilerOptions: CompilerOptions) {
-        return compilerOptions.module ?
+        return typeof compilerOptions.module === "number" ?
             compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) === ScriptTarget.ES6 ? ModuleKind.ES6 : ModuleKind.None;
+            getEmitScriptTarget(compilerOptions) === ScriptTarget.ES6 ? ModuleKind.ES6 : ModuleKind.CommonJS;
     }
 
     export interface EmitFileNames {

src/harness/harness.ts

@@ -974,7 +974,6 @@ namespace Harness {
 
             const options: ts.CompilerOptions & HarnessOptions = compilerOptions ? ts.clone(compilerOptions) : { noResolve: false };
             options.target = options.target || ts.ScriptTarget.ES3;
-            options.module = options.module || ts.ModuleKind.None;
             options.newLine = options.newLine || ts.NewLineKind.CarriageReturnLineFeed;
             options.noErrorTruncation = true;
             options.skipDefaultLibCheck = true;

src/services/services.ts

@@ -1712,7 +1712,6 @@ namespace ts {
         // Always default to "ScriptTarget.ES5" for the language service
         return {
             target: ScriptTarget.ES5,
-            module: ModuleKind.None,
             jsx: JsxEmit.Preserve
         };
     }

tests/baselines/reference/ExportAssignment7.errors.txt

@@ -1,12 +1,9 @@
-tests/cases/compiler/ExportAssignment7.ts(1,14): error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
 tests/cases/compiler/ExportAssignment7.ts(4,1): error TS2309: An export assignment cannot be used in a module with other exported elements.
 tests/cases/compiler/ExportAssignment7.ts(4,10): error TS2304: Cannot find name 'B'.
 
 
-==== tests/cases/compiler/ExportAssignment7.ts (3 errors) ====
+==== tests/cases/compiler/ExportAssignment7.ts (2 errors) ====
     export class C {
-                 ~
-!!! error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
     }
 
     export = B;

tests/baselines/reference/ExportAssignment8.errors.txt

@@ -1,13 +1,10 @@
-tests/cases/compiler/ExportAssignment8.ts(1,1): error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
 tests/cases/compiler/ExportAssignment8.ts(1,1): error TS2309: An export assignment cannot be used in a module with other exported elements.
 tests/cases/compiler/ExportAssignment8.ts(1,10): error TS2304: Cannot find name 'B'.
 
 
-==== tests/cases/compiler/ExportAssignment8.ts (3 errors) ====
+==== tests/cases/compiler/ExportAssignment8.ts (2 errors) ====
     export = B;
     ~~~~~~~~~~~
-!!! error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
-    ~~~~~~~~~~~
 !!! error TS2309: An export assignment cannot be used in a module with other exported elements.
              ~
 !!! error TS2304: Cannot find name 'B'.

tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedLocalVarsOfTheSameName.errors.txt

@@ -1,13 +1,10 @@
-tests/cases/conformance/internalModules/DeclarationMerging/part1.ts(1,15): error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
 tests/cases/conformance/internalModules/DeclarationMerging/part2.ts(3,24): error TS2304: Cannot find name 'Point'.
 tests/cases/conformance/internalModules/DeclarationMerging/part2.ts(7,36): error TS2304: Cannot find name 'Point'.
 tests/cases/conformance/internalModules/DeclarationMerging/part2.ts(7,54): error TS2304: Cannot find name 'Point'.
 
 
-==== tests/cases/conformance/internalModules/DeclarationMerging/part1.ts (1 errors) ====
+==== tests/cases/conformance/internalModules/DeclarationMerging/part1.ts (0 errors) ====
     export module A {
-                  ~
-!!! error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
         export interface Point {
             x: number;
             y: number;

tests/baselines/reference/ambientDeclarationsExternal.symbols

@@ -0,0 +1,36 @@
+=== tests/cases/conformance/ambient/consumer.ts ===
+/// <reference path="decls.ts" />
+import imp1 = require('equ');
+>imp1 : Symbol(imp1, Decl(consumer.ts, 0, 0))
+
+
+// Ambient external module members are always exported with or without export keyword when module lacks export assignment
+import imp3 = require('equ2');
+>imp3 : Symbol(imp3, Decl(consumer.ts, 1, 29))
+
+var n = imp3.x;
+>n : Symbol(n, Decl(consumer.ts, 6, 3), Decl(consumer.ts, 7, 3))
+>imp3.x : Symbol(imp3.x, Decl(decls.ts, 8, 7))
+>imp3 : Symbol(imp3, Decl(consumer.ts, 1, 29))
+>x : Symbol(imp3.x, Decl(decls.ts, 8, 7))
+
+var n: number;
+>n : Symbol(n, Decl(consumer.ts, 6, 3), Decl(consumer.ts, 7, 3))
+
+=== tests/cases/conformance/ambient/decls.ts ===
+
+// Ambient external module with export assignment
+declare module 'equ' {
+    var x;
+>x : Symbol(x, Decl(decls.ts, 3, 7))
+
+    export = x;
+>x : Symbol(x, Decl(decls.ts, 3, 7))
+}
+
+declare module 'equ2' {
+    var x: number;
+>x : Symbol(x, Decl(decls.ts, 8, 7))
+}
+
+// Ambient external import declaration referencing ambient external module using top level module name

tests/baselines/reference/ambientDeclarationsExternal.types

@@ -0,0 +1,36 @@
+=== tests/cases/conformance/ambient/consumer.ts ===
+/// <reference path="decls.ts" />
+import imp1 = require('equ');
+>imp1 : any
+
+
+// Ambient external module members are always exported with or without export keyword when module lacks export assignment
+import imp3 = require('equ2');
+>imp3 : typeof imp3
+
+var n = imp3.x;
+>n : number
+>imp3.x : number
+>imp3 : typeof imp3
+>x : number
+
+var n: number;
+>n : number
+
+=== tests/cases/conformance/ambient/decls.ts ===
+
+// Ambient external module with export assignment
+declare module 'equ' {
+    var x;
+>x : any
+
+    export = x;
+>x : any
+}
+
+declare module 'equ2' {
+    var x: number;
+>x : number
+}
+
+// Ambient external import declaration referencing ambient external module using top level module name

tests/baselines/reference/circularReference.errors.txt

@@ -1,4 +1,3 @@
-tests/cases/conformance/externalModules/foo1.ts(1,1): error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
 tests/cases/conformance/externalModules/foo1.ts(9,12): error TS2339: Property 'x' does not exist on type 'C1'.
 tests/cases/conformance/externalModules/foo2.ts(8,12): error TS2339: Property 'y' does not exist on type 'C1'.
 tests/cases/conformance/externalModules/foo2.ts(13,8): error TS2339: Property 'x' does not exist on type 'C1'.
@@ -26,10 +25,8 @@ tests/cases/conformance/externalModules/foo2.ts(13,8): error TS2339: Property 'x
     	}
     }
 
-==== tests/cases/conformance/externalModules/foo1.ts (2 errors) ====
+==== tests/cases/conformance/externalModules/foo1.ts (1 errors) ====
     import foo2 = require('./foo2');
-    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
     export module M1 {
     	export class C1 {
     		m1: foo2.M1.C1;

tests/baselines/reference/classAbstractManyKeywords.errors.txt

@@ -1,13 +1,10 @@
-tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractManyKeywords.ts(1,1): error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
 tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractManyKeywords.ts(1,25): error TS1005: ';' expected.
 tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractManyKeywords.ts(3,1): error TS1128: Declaration or statement expected.
 tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractManyKeywords.ts(4,17): error TS1005: '=' expected.
 
 
-==== tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractManyKeywords.ts (4 errors) ====
+==== tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractManyKeywords.ts (3 errors) ====
     export default abstract class A {}
-    ~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
                             ~~~~~
 !!! error TS1005: ';' expected.
     export abstract class B {}

tests/baselines/reference/classMemberInitializerWithLamdaScoping3.errors.txt

@@ -1,17 +1,14 @@
-tests/cases/compiler/classMemberInitializerWithLamdaScoping3_1.ts(4,14): error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
 tests/cases/compiler/classMemberInitializerWithLamdaScoping3_1.ts(8,21): error TS2301: Initializer of instance member variable 'messageHandler' cannot reference identifier 'field1' declared in the constructor.
 
 
 ==== tests/cases/compiler/classMemberInitializerWithLamdaScoping3_0.ts (0 errors) ====
     var field1: string;
 
-==== tests/cases/compiler/classMemberInitializerWithLamdaScoping3_1.ts (2 errors) ====
+==== tests/cases/compiler/classMemberInitializerWithLamdaScoping3_1.ts (1 errors) ====
     declare var console: {
         log(msg?: any): void;
     };
     export class Test1 {
-                 ~~~~~
-!!! error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
         constructor(private field1: string) {
         }
         messageHandler = () => {

tests/baselines/reference/classMemberInitializerWithLamdaScoping4.errors.txt

@@ -1,11 +1,8 @@
-tests/cases/compiler/classMemberInitializerWithLamdaScoping3_0.ts(1,1): error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
 tests/cases/compiler/classMemberInitializerWithLamdaScoping3_1.ts(8,21): error TS2304: Cannot find name 'field1'.
 
 
-==== tests/cases/compiler/classMemberInitializerWithLamdaScoping3_0.ts (1 errors) ====
+==== tests/cases/compiler/classMemberInitializerWithLamdaScoping3_0.ts (0 errors) ====
     export var field1: string;
-    ~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
 
 ==== tests/cases/compiler/classMemberInitializerWithLamdaScoping3_1.ts (1 errors) ====
     declare var console: {

tests/baselines/reference/duplicateExportAssignments.errors.txt

@@ -1,4 +1,3 @@
-tests/cases/conformance/externalModules/foo1.ts(3,1): error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
 tests/cases/conformance/externalModules/foo1.ts(3,1): error TS2300: Duplicate identifier 'export='.
 tests/cases/conformance/externalModules/foo1.ts(4,1): error TS2300: Duplicate identifier 'export='.
 tests/cases/conformance/externalModules/foo2.ts(3,1): error TS2300: Duplicate identifier 'export='.
@@ -12,13 +11,11 @@ tests/cases/conformance/externalModules/foo5.ts(5,1): error TS2300: Duplicate id
 tests/cases/conformance/externalModules/foo5.ts(6,1): error TS2300: Duplicate identifier 'export='.
 
 
-==== tests/cases/conformance/externalModules/foo1.ts (3 errors) ====
+==== tests/cases/conformance/externalModules/foo1.ts (2 errors) ====
     var x = 10;
     var y = 20;
     export = x;
     ~~~~~~~~~~~
-!!! error TS1148: Cannot compile modules unless the '--module' flag is provided. Consider setting the 'module' compiler option in a 'tsconfig.json' file.
-    ~~~~~~~~~~~
 !!! error TS2300: Duplicate identifier 'export='.
     export = y;
     ~~~~~~~~~~~