use blessed for dev mode terminal output

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "sapper",
-  "version": "0.19.0",
+  "version": "0.19.3",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -10,6 +10,15 @@
       "integrity": "sha1-MU+BaPUK5IoDLP2tX9tDb0ZKl6w=",
       "dev": true
     },
+    "@types/blessed": {
+      "version": "0.1.10",
+      "resolved": "https://registry.npmjs.org/@types/blessed/-/blessed-0.1.10.tgz",
+      "integrity": "sha512-lCpkGnCq2lj9RBPwh/RH/ZJegYV6JdyyRHmURIW1DwMdtNhRRxYeHllqaMu8K6bDf6zhO7PpHsmEqlYMDPlmhw==",
+      "requires": {
+        "@types/events": "*",
+        "@types/node": "*"
+      }
+    },
     "@types/estree": {
       "version": "0.0.39",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-0.0.39.tgz",
@@ -19,8 +28,7 @@
     "@types/events": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/@types/events/-/events-1.2.0.tgz",
-      "integrity": "sha512-KEIlhXnIutzKwRbQkGWb/I4HFqBuUykAdHgDED6xqwXJfONCjF5VoE0cXEiurh3XauygxzeDzgtXUqvLkxFzzA==",
+      "integrity": "sha512-KEIlhXnIutzKwRbQkGWb/I4HFqBuUykAdHgDED6xqwXJfONCjF5VoE0cXEiurh3XauygxzeDzgtXUqvLkxFzzA=="
-      "dev": true
     },
     "@types/glob": {
       "version": "5.0.35",
@@ -57,8 +65,7 @@
     "@types/node": {
       "version": "10.9.4",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-10.9.4.tgz",
-      "integrity": "sha512-fCHV45gS+m3hH17zgkgADUSi2RR1Vht6wOZ0jyHP8rjiQra9f+mIcgwPQHllmDocYOstIEbKlxbFDYlgrTPYqw==",
+      "integrity": "sha512-fCHV45gS+m3hH17zgkgADUSi2RR1Vht6wOZ0jyHP8rjiQra9f+mIcgwPQHllmDocYOstIEbKlxbFDYlgrTPYqw=="
-      "dev": true
     },
     "@types/rimraf": {
       "version": "2.0.2",
@@ -1010,6 +1017,11 @@
       "integrity": "sha1-RqoXUftqL5PuXmibsQh9SxTGwgU=",
       "dev": true
     },
+    "blessed": {
+      "version": "0.1.81",
+      "resolved": "https://registry.npmjs.org/blessed/-/blessed-0.1.81.tgz",
+      "integrity": "sha1-+WLWh+wsNpVwrnGvhDJW5tDKESk="
+    },
     "bluebird": {
       "version": "3.5.1",
       "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.1.tgz",

package.json

@@ -19,6 +19,8 @@
     "test": "test"
   },
   "dependencies": {
+    "@types/blessed": "^0.1.10",
+    "blessed": "^0.1.81",
     "html-minifier": "^3.5.16",
     "shimport": "^0.0.10",
     "source-map-support": "^0.5.6",

src/cli/dev.ts

@@ -1,11 +1,78 @@
 import * as path from 'path';
 import colors from 'kleur';
 import * as child_process from 'child_process';
+import * as blessed from 'blessed';
 import prettyMs from 'pretty-ms';
 import { dev as _dev } from '../api/dev';
 import * as events from '../api/interfaces';
 
 export function dev(opts: { port: number, open: boolean, bundler?: string }) {
+	const screen = blessed.screen({
+		smartCSR: true
+	});
+
+	const status_box = blessed.box({
+		width: '100%',
+		height: '50%',
+		scrollable: true
+	});
+
+	let mouse_is_down = false;
+	let dragging = false;
+
+	screen.on('mousedown', data => {
+		if (mouse_is_down) {
+			if (dragging) {
+				divider.top = data.y;
+				status_box.height = data.y;
+				log_box.height = screen.height - (data.y + 1);
+				screen.render();
+			}
+		} else {
+			if (data.y === divider.top) {
+				dragging = true;
+			}
+
+			mouse_is_down = true;
+		}
+	});
+
+	screen.on('mouseup', data => {
+		mouse_is_down = false;
+	});
+
+	const log_box = blessed.box({
+		bottom: '0',
+		width: '100%',
+		height: '50%',
+		scrollable: true
+	});
+
+	const divider = blessed.line({
+		top: '50%',
+		orientation: 'horizontal'
+	});
+
+	screen.append(status_box);
+	screen.append(log_box);
+	screen.append(divider);
+	screen.render();
+
+	screen.key(['escape', 'q', 'C-c'], function(ch, key) {
+		return process.exit(0);
+	});
+
+	const append_log = data => {
+		log_box.setContent(log_box.getContent() + data);
+		screen.render();
+	};
+
+	const append_status = line => {
+		const lines = status_box.getLines();
+		status_box.insertLine(lines.length, line);
+		screen.render();
+	};
+
 	try {
 		const watcher = _dev(opts);
 
@@ -13,68 +80,62 @@ export function dev(opts: { port: number, open: boolean, bundler?: string }) {
 
 		watcher.on('ready', (event: events.ReadyEvent) => {
 			if (first) {
-				console.log(colors.bold.cyan(`> Listening on http://localhost:${event.port}`));
+				append_status(colors.bold.cyan(`> Listening on http://localhost:${event.port}`));
 				if (opts.open) child_process.exec(`open http://localhost:${event.port}`);
 				first = false;
 			}
 
-			// TODO clear screen?
+			event.process.stdout.on('data', append_log);
-
+			event.process.stderr.on('data', append_log);
-			event.process.stdout.on('data', data => {
-				process.stdout.write(data);
-			});
-
-			event.process.stderr.on('data', data => {
-				process.stderr.write(data);
-			});
 		});
 
 		watcher.on('invalid', (event: events.InvalidEvent) => {
 			const changed = event.changed.map(filename => path.relative(process.cwd(), filename)).join(', ');
-			console.log(`\n${colors.bold.cyan(changed)} changed. rebuilding...`);
+			status_box.setContent('');
+			append_status(`\n${colors.bold.cyan(changed)} changed. rebuilding...`);
 		});
 
 		watcher.on('error', (event: events.ErrorEvent) => {
-			console.log(colors.red(`✗ ${event.type}`));
+			append_status(colors.red(`✗ ${event.type}`));
-			console.log(colors.red(event.message));
+			append_status(colors.red(event.message));
 		});
 
 		watcher.on('fatal', (event: events.FatalEvent) => {
-			console.log(colors.bold.red(`> ${event.message}`));
+			append_status(colors.bold.red(`> ${event.message}`));
-			if (event.log) console.log(event.log);
+			if (event.log) append_status(event.log);
 		});
 
 		watcher.on('build', (event: events.BuildEvent) => {
 			if (event.errors.length) {
-				console.log(colors.bold.red(`✗ ${event.type}`));
+				append_status(colors.bold.red(`✗ ${event.type}`));
 
 				event.errors.filter(e => !e.duplicate).forEach(error => {
-					if (error.file) console.log(colors.bold(error.file));
+					if (error.file) append_status(colors.bold(error.file));
-					console.log(error.message);
+					append_status(error.message);
 				});
 
 				const hidden = event.errors.filter(e => e.duplicate).length;
 				if (hidden > 0) {
-					console.log(`${hidden} duplicate ${hidden === 1 ? 'error' : 'errors'} hidden\n`);
+					append_status(`${hidden} duplicate ${hidden === 1 ? 'error' : 'errors'} hidden\n`);
 				}
 			} else if (event.warnings.length) {
-				console.log(colors.bold.yellow(`• ${event.type}`));
+				append_status(colors.bold.yellow(`• ${event.type}`));
 
 				event.warnings.filter(e => !e.duplicate).forEach(warning => {
-					if (warning.file) console.log(colors.bold(warning.file));
+					if (warning.file) append_status(colors.bold(warning.file));
-					console.log(warning.message);
+					append_status(warning.message);
 				});
 
 				const hidden = event.warnings.filter(e => e.duplicate).length;
 				if (hidden > 0) {
-					console.log(`${hidden} duplicate ${hidden === 1 ? 'warning' : 'warnings'} hidden\n`);
+					append_status(`${hidden} duplicate ${hidden === 1 ? 'warning' : 'warnings'} hidden\n`);
 				}
 			} else {
-				console.log(`${colors.bold.green(`✔ ${event.type}`)} ${colors.gray(`(${prettyMs(event.duration)})`)}`);
+				append_status(`${colors.bold.green(`✔ ${event.type}`)} ${colors.gray(`(${prettyMs(event.duration)})`)}`);
 			}
 		});
 	} catch (err) {
-		console.log(colors.bold.red(`> ${err.message}`));
+		append_status(colors.bold.red(`> ${err.message}`));
 		process.exit(1);
 	}
 }