Add release script

Author: mjackson

package.json

@@ -2,6 +2,8 @@
   "name": "react-stdio",
   "version": "2.0.7",
   "description": "Render React.js components on any backend",
+  "author": "Michael Jackson",
+  "license": "MIT",
   "bin": "./bin/react-stdio",
   "preferGlobal": true,
   "repository": {
@@ -12,8 +14,6 @@
     "bin",
     "server.js"
   ],
-  "author": "Michael Jackson",
-  "license": "MIT",
   "dependencies": {
     "JSONStream": "^1.0.7",
     "babel-preset-es2015": "^6.3.13",
@@ -23,5 +23,8 @@
     "invariant": "^2.2.0",
     "react": "^0.14.5",
     "react-dom": "^0.14.5"
+  },
+  "devDependencies": {
+    "readline-sync": "^1.4.1"
   }
 }

scripts/release.js

@@ -0,0 +1,44 @@
+const resolvePath = require('path').resolve
+const readFileSync = require('fs').readFileSync
+const execSync = require('child_process').execSync
+const prompt = require('readline-sync').question
+
+const exec = (command) =>
+  execSync(command, { stdio: 'inherit' })
+
+const getPackageVersion = () =>
+  JSON.parse(readFileSync(resolvePath(__dirname, '../package.json'))).version
+
+if (process.cwd() !== resolvePath(__dirname, '..')) {
+  console.error('The release script must be run from the repo root')
+  process.exit(1)
+}
+
+// Get the next version, which may be specified as a semver
+// version number or anything `npm version` recognizes. This
+// is a "pre-release" if nextVersion is premajor, preminor,
+// prepatch, or prerelease
+const nextVersion = prompt(`Next version (current version is ${getPackageVersion()})? `)
+const isPrerelease = nextVersion.substring(0, 3) === 'pre'
+
+// 1) Increment the package version in package.json
+// 2) Create a new commit
+// 3) Create a v* tag that points to that commit
+exec(`npm version ${nextVersion} -m "Version %s"`)
+
+// 4) Push to GitHub master. Do this before we publish in
+// case anyone has pushed to GitHub since we last pulled
+exec('git push origin master')
+
+// 5) Publish to npm. Use the "next" tag for pre-releases,
+// "latest" for all others
+exec(`npm publish --tag ${isPrerelease ? 'next' : 'latest'}`)
+
+// 6) Push the v* tag to GitHub
+exec(`git push -f origin v${getPackageVersion()}`)
+
+// 7) Push the "latest" tag to GitHub
+if (!isPrerelease) {
+  exec('git tag -f latest')
+  exec('git push -f origin latest')
+}