feat: mars build support watch mode

Author: meixg

packages/mars-cli/bin/mars-build.js

@@ -13,6 +13,7 @@ program
     .description('build project in production mode')
     .option('-r, --registry <url>', 'Use specified npm registry when installing dependencies (only for npm)')
     .option('-t, --target <target>', 'Build target (swan | h5 | wx, default: swan)')
+    .option('-w, --watch', 'Open watch mode')
     .action(cmd => {
         const build = require('../lib/build');
         const options = cleanArgs(cmd);

packages/mars-cli/bin/mars.js

@@ -148,6 +148,7 @@ program
     .description('build project in production mode')
     .option('-r, --registry <url>', 'Use specified npm registry when installing dependencies (only for npm)')
     .option('-t, --target <target>', 'Build target (swan | h5 | wx, default: swan)')
+    .option('-w, --watch', 'Open watch mode')
     .action(cmd => {
         const options = cleanArgs(cmd);
         const buildPath = path.resolve(__dirname, './mars-build.js');

packages/mars-cli/lib/build.js

@@ -15,19 +15,21 @@ async function build(cmd) {
 
     const {
         build,
+        watch,
         clean
     } = require(buildPath);
 
     const options = {
-        target,
-        build: true
+        target
     };
     process.env.NODE_ENV = 'production';
     process.env.MARS_CLI_OPTIONS = JSON.stringify(options);
     process.env.MARS_CLI_TARGET = target;
 
+    const run = cmd.watch ? watch : build;
+
     clean(options).once('stop', () => {
-        build(options).once('stop', () => {
+        run(options).once('stop', () => {
             if (target === 'h5') {
                 const child = execa('npm', ['run', 'build-dist-h5']);
                 child.stdout.pipe(process.stdout);