Chore: add .travis.yml to auto-deploy

Author: mysticatea

.travis.yml

@@ -0,0 +1,11 @@
+sudo: false
+
+branches:
+  only:
+    - master
+
+language: node_js
+node_js: "8"
+
+script:
+  - git config --local user.name "Travis CI" && npm run deploy

scripts/deploy.js

@@ -6,6 +6,7 @@
 
 const sh = require("shelljs")
 const version = require("../package.json").version
+const ATOKEN = process.env.ATOKEN //eslint-disable-line no-process-env
 
 //------------------------------------------------------------------------------
 // Helpers
@@ -46,16 +47,30 @@ function exec(command) {
 // Main
 //------------------------------------------------------------------------------
 
+// Build.
 exec(`git checkout v${version}`)
 exec("npm run build")
+
+// Load gh-pages.
+if (ATOKEN) {
+    exec("git fetch --depth=1 https://github.com/mysticatea/vue-eslint-demo.git gh-pages:gh-pages")
+}
 exec("git checkout gh-pages")
 
-if (String(sh.cat("dist/versions.json")) !== String(sh.cat("versions.json"))) {
+// Check versions.
+const oldVersions = String(sh.cat("versions.json"))
+const newVersions = String(sh.cat("dist/versions.json"))
+sh.echo(`OLD: ${oldVersions}`)
+sh.echo(`NEW: ${newVersions}`)
+
+// Deploy.
+if (newVersions !== oldVersions) {
     rm("-rf", "vs", "index.*")
     cp("-r", "dist/*", ".")
     exec("git add -A")
     exec("git commit -m \"Update: website\"")
-    exec("git push")
+    exec(`git push${ATOKEN ? ` https://mysticatea:${ATOKEN}@github.com/mysticatea/vue-eslint-demo.git gh-pages:gh-pages` : ""}`)
 }
 
+// Back to master.
 exec("git checkout master")