feat(serve): add --index-name to rewrite default index name (#48)

* feat: add index-name option to cli

* feat(serve): update serve command to serve index

* feat(locales): update translations

* fix(gulp): downgrade gulp to 3.9.0, buggy 3.9.1

* build(CI): seems node11 natives need to update

.travis.yml

@@ -9,6 +9,7 @@ cache:
     - ./node_modules
 install:
   - npm install
-  - npm install -g gulp
+  - npm install natives@1.1.6
+  - npm install -g gulp@3.9.0
 script:
   - gulp lint

bin/docsify

@@ -72,9 +72,16 @@ var yargs = require('yargs')
         nargs: 1,
         requiresArg: true,
         type: 'number'
+      },
+      'index-name': {
+        alias: 'i',
+        desc: chalk.gray(y18n.__('serve.indexname')),
+        nargs: 1,
+        requiresArg: true,
+        type: 'string'
       }
     }),
-    handler: (argv) => run.serve(argv.path, argv.open, argv.port, argv.P)
+    handler: (argv) => run.serve(argv.path, argv.open, argv.port, argv.P, argv.i)
   })
   .command({
     command: 'start <path>',

lib/commands/serve.js

@@ -11,12 +11,13 @@ const util = require('../util/index')
 var exists = util.exists
 var resolve = util.resolve
 
-module.exports = function (path, openInBrowser, port, livereloadPort) {
+module.exports = function (path, openInBrowser, port, livereloadPort, indexName) {
   path = resolve(path || '.')
-  var indexFile = resolve(path, 'index.html')
+  var indexFile = resolve(path, indexName || 'index.html')
 
   if (!exists(indexFile)) {
-    const msg = '\nNo docs found, please run ' + chalk.green('docsify init') + ' first.\n'
+    const msg = '\nNo docs found ' + indexFile +
+                '\nPlease run ' + chalk.green('docsify init') + ' first.\n'
     console.log(msg)
     process.exit(0)
   }
@@ -25,7 +26,7 @@ module.exports = function (path, openInBrowser, port, livereloadPort) {
   server.use(livereload({
     port: livereloadPort
   }))
-  server.use(serveStatic(path))
+  server.use(serveStatic(path, { 'index': indexName }))
   server.listen(port)
   lrserver.createServer({
     extraExts: ['md'],