feat: add extension option to support ESM

.vscode/tasks.json

@@ -1,31 +1,51 @@
 {
 	// See https://go.microsoft.com/fwlink/?LinkId=733558
 	// for the documentation about the tasks.json format
-	"version": "0.1.0",
+	"version": "2.0.0",
 	"command": "npm",
-	"isShellCommand": true,
-	"showOutput": "always",
-	"suppressTaskName": true,
 	"echoCommand": true,
 	"tasks": [
 		{
-			"taskName": "install",
-			"args": ["install"]
+			"label": "install",
+			"type": "shell",
+			"args": [
+				"install"
+			],
+			"problemMatcher": []
 		},
 		{
-			"taskName": "update",
-			"args": ["update"]
+			"label": "update",
+			"type": "shell",
+			"args": [
+				"update"
+			],
+			"problemMatcher": []
 		},
 		{
-			"taskName": "test",
-			"args": ["run", "test"],
-			"problemMatcher": "$tsc"
+			"label": "test",
+			"type": "shell",
+			"args": [
+				"run",
+				"test"
+			],
+			"problemMatcher": "$tsc",
+			"group": {
+				"_id": "test",
+				"isDefault": false
+			}
 		},
 		{
-			"taskName": "build",
-			"args": ["run", "build"],
-			"isBuildCommand": true,
-			"problemMatcher": "$tsc"
+			"label": "build",
+			"type": "shell",
+			"args": [
+				"run",
+				"build"
+			],
+			"problemMatcher": "$tsc",
+			"group": {
+				"_id": "build",
+				"isDefault": false
+			}
 		}
 	]
 }

.vscode/tasks.json.old

@@ -0,0 +1,31 @@
+{
+	// See https://go.microsoft.com/fwlink/?LinkId=733558
+	// for the documentation about the tasks.json format
+	"version": "0.1.0",
+	"command": "npm",
+	"isShellCommand": true,
+	"showOutput": "always",
+	"suppressTaskName": true,
+	"echoCommand": true,
+	"tasks": [
+		{
+			"taskName": "install",
+			"args": ["install"]
+		},
+		{
+			"taskName": "update",
+			"args": ["update"]
+		},
+		{
+			"taskName": "test",
+			"args": ["run", "test"],
+			"problemMatcher": "$tsc"
+		},
+		{
+			"taskName": "build",
+			"args": ["run", "build"],
+			"isBuildCommand": true,
+			"problemMatcher": "$tsc"
+		}
+	]
+}

README.md

@@ -154,7 +154,7 @@ than recursively searching child directories.
 
 ### `-n [name]` or `--name [name]`
 
-Specifies the name to use for creating new barrels (and identifying old ones). `.ts` wil be
+Specifies the name to use for creating new barrels (and identifying old ones). `.ts` will be
 appended if not included in the name. Barrels names will be defaulted to `index.ts`.
 
 ### `-s [mode]` or `--structure [mode]`
@@ -212,6 +212,16 @@ Display the barrelsby version number.
 
 Display additional debug information.
 
+### `-x [extension]`or `--extension [extension]`
+Add extension suffix to exports (e.g. '.js'). Useful for ESM modules.
+
+```TypeScript
+// Without --extension
+export * from "./Slider";
+// With --extension
+export * from "./Slider.js";
+```
+
 ## Requirements
 
 Requires node v6.0.0 or greater for ES6 syntax.

barrelsby.json

@@ -7,5 +7,6 @@
 	"structure": "filesystem",
 	"verbose": true,
 	"include": [".ts$"],
-	"exclude": ["zeta.ts$"]
+	"exclude": ["zeta.ts$"],
+	"extension": ""
 }

bin/builder.d.ts

@@ -4,9 +4,9 @@ import { SemicolonCharacter } from "./options/noSemicolon";
 import { StructureOption } from "./options/options";
 import { QuoteCharacter } from "./options/quoteCharacter";
 import { Directory, Location } from "./utilities";
-export declare function buildBarrels(destinations: Directory[], quoteCharacter: QuoteCharacter, semicolonCharacter: SemicolonCharacter, barrelName: string, logger: Logger, baseUrl: BaseUrl, exportDefault: boolean, structure: StructureOption | undefined, local: boolean, include: string[], exclude: string[]): void;
-export declare type BarrelBuilder = (directory: Directory, modules: Location[], quoteCharacter: QuoteCharacter, semicolonCharacter: SemicolonCharacter, logger: Logger, baseUrl: BaseUrl, exportDefault: boolean) => string;
+export declare function buildBarrels(destinations: Directory[], quoteCharacter: QuoteCharacter, semicolonCharacter: SemicolonCharacter, barrelName: string, logger: Logger, baseUrl: BaseUrl, exportDefault: boolean, structure: StructureOption | undefined, local: boolean, include: string[], exclude: string[], extension: boolean): void;
+export declare type BarrelBuilder = (directory: Directory, modules: Location[], quoteCharacter: QuoteCharacter, semicolonCharacter: SemicolonCharacter, logger: Logger, baseUrl: BaseUrl, exportDefault: boolean, extension: boolean) => string;
 /** Builds the TypeScript */
-export declare function buildImportPath(directory: Directory, target: Location, baseUrl: BaseUrl): string;
+export declare function buildImportPath(directory: Directory, target: Location, baseUrl: BaseUrl, extension: boolean): string;
 /** Strips the .ts or .tsx file extension from a path and returns the base filename. */
-export declare function getBasename(relativePath: string): string;
+export declare function getBaseNameWithoutExtension(relativePath: string): string;