feat(extensions): Add emmet extension (#2244)

This adds the built in VSCode emmet extension (Emmet 2.0), and hooks it up.

There are a few additional features we need, though, to get it usable:
- [x] Handle the `isIncomplete` value from a completion provider - emmet sends this to tell the editor to continue to request completions. We don't handle it, currently. 
- [x] Proper snippet expansion - we have an extremely minimal snippet implementation, which means the expansion aren't too helpful

__Next steps:__
-  Completion documentation - there is no preview for the expansion, currently. (tracking in #2329 )

Fixes #1948

CHANGES_CURRENT.md

@@ -6,6 +6,7 @@
 - #3090 - Snippets: Add insert snippet command
 - #3105 - Snippets: Implement configuration setting
 - #3132 - Snippets: User snippet editing
+- #2244 - Extension: Emmet support (fixes #1948)
 
 ### Bug Fixes
 

extensions/emmet/.vscode/launch.json

@@ -0,0 +1,31 @@
+{
+	// Use IntelliSense to learn about possible Node.js debug attributes.
+	// Hover to view descriptions of existing attributes.
+	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"type": "extensionHost",
+			"request": "launch",
+			"name": "Launch Extension",
+			"runtimeExecutable": "${execPath}",
+			"args": ["--extensionDevelopmentPath=${workspaceFolder}"],
+			"sourceMaps": true,
+			"outFiles": ["${workspaceFolder}/out/**/*.js"]
+		},
+		{
+			"type": "extensionHost",
+			"request": "launch",
+			"name": "Launch Tests",
+			"runtimeExecutable": "${execPath}",
+			"args": [
+				"--extensionDevelopmentPath=${workspaceFolder}",
+				"--extensionTestsPath=${workspaceFolder}/out/test",
+				"--disable-extensions",
+				"--skip-getting-started",
+			],
+			"sourceMaps": true,
+			"outFiles": ["${workspaceFolder}/out/**/*.js"]
+		}
+	]
+}

extensions/emmet/.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "emmet.excludeLanguages": []
+}

extensions/emmet/.vscodeignore

@@ -0,0 +1,9 @@
+test/**
+src/**
+out/**
+tsconfig.json
+extension.webpack.config.js
+CONTRIBUTING.md
+cgmanifest.json
+yarn.lock
+.vscode

extensions/emmet/CONTRIBUTING.md

@@ -0,0 +1,14 @@
+## How to build and run from source?
+
+Read the basics about extension authoring from [Extending Visual Studio Code](https://code.visualstudio.com/docs/extensions/overview)
+
+- Read [Build and Run VS Code from Source](https://github.com/Microsoft/vscode/wiki/How-to-Contribute#build-and-run-from-source) to get a local dev set up running for VS Code
+- Open the `extensions/emmet` folder in the vscode repo in VS Code
+- Press F5 to start debugging
+
+## Running tests
+
+Tests for Emmet extension are run as integration tests as part of VS Code.
+
+- Read [Build and Run VS Code from Source](https://github.com/Microsoft/vscode/wiki/How-to-Contribute#build-and-run-from-source) to get a local dev set up running for VS Code
+- Run `./scripts/test-integration.sh` to run all the integrations tests that include the Emmet tests.

extensions/emmet/README.md

@@ -0,0 +1,9 @@
+# Emmet integration in Visual Studio Code
+
+**Notice:** This extension is bundled with Visual Studio Code. It can be disabled but not uninstalled.
+
+## Features
+
+See [Emmet in Visual Studio Code](https://code.visualstudio.com/docs/editor/emmet) to learn about the features of this extension.
+
+Please read the [CONTRIBUTING.md](https://github.com/Microsoft/vscode/blob/master/extensions/emmet/CONTRIBUTING.md) file to learn how to contribute to this extension.

extensions/emmet/cgmanifest.json

@@ -0,0 +1,17 @@
+{
+	"registrations": [
+		{
+			"component": {
+				"type": "git",
+				"git": {
+					"name": "expand-abbreviation",
+					"repositoryUrl": "https://github.com/emmetio/expand-abbreviation",
+					"commitHash": "ef943f2056572fe43ce9eebf72929d3c825f3995"
+				}
+			},
+			"license": "MIT",
+			"version": "0.5.8"
+		}
+	],
+	"version": 1
+}

extensions/emmet/extension.webpack.config.js

@@ -0,0 +1,20 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+//@ts-check
+
+'use strict';
+
+const withDefaults = require('../shared.webpack.config');
+
+module.exports = withDefaults({
+	context: __dirname,
+	entry: {
+		extension: './src/extension.ts',
+	},
+	externals: {
+		'vscode-emmet-helper': 'commonjs vscode-emmet-helper',
+	},
+});