Add release script

Author: lucasecdb

.release-it.yml

@@ -0,0 +1,8 @@
+scripts:
+  beforeStage: yarn update-changelog
+git:
+  tagName: 'v${version}'
+  tagAnnotation: 'v${version}'
+  commitMessage: 'v${version}'
+npm:
+  publish: true

package.json

@@ -11,7 +11,9 @@
   "scripts": {
     "start": "tsdx watch",
     "build": "tsdx build",
-    "test": "tsdx test --env=jsdom"
+    "test": "tsdx test --env=jsdom",
+    "update-changelog": "node ./scripts/update-changelog",
+    "release": "release-it"
   },
   "peerDependencies": {
     "react": "^16.8.0"
@@ -32,6 +34,7 @@
     "pretty-quick": "^1.10.0",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",
+    "release-it": "^12.2.0",
     "tsdx": "^0.5.9",
     "tslib": "^1.9.3",
     "typescript": "^3.4.5"

scripts/.eslintrc.json

@@ -0,0 +1,12 @@
+{
+  "parserOptions": {
+    "sourceType": "script"
+  },
+  "env": {
+    "browser": false,
+    "jest": false
+  },
+  "rules": {
+    "@typescript-eslint/no-var-requires": "off"
+  }
+}

scripts/update-changelog.js

@@ -0,0 +1,45 @@
+#!/usr/bin/env node
+
+const fs = require('fs')
+const { promisify } = require('util')
+
+const readFile = promisify(fs.readFile)
+const writeFile = promisify(fs.writeFile)
+
+const CHANGELOG_FILENAME = 'CHANGELOG.md'
+const UNRELEASED_SECTION = '## [Unreleased]'
+
+const getVersion = () => {
+  const package = require('../package.json')
+
+  return package.version
+}
+
+const update = async () => {
+  const changelog = (await readFile(CHANGELOG_FILENAME)).toString()
+
+  const unreleasedSectionIndex = changelog.indexOf(UNRELEASED_SECTION)
+  const headerLength = unreleasedSectionIndex + UNRELEASED_SECTION.length + 1
+
+  const header = changelog.slice(0, headerLength)
+
+  const body = changelog.slice(headerLength)
+  const now = new Date()
+
+  const year = now.getFullYear()
+  const month = (now.getUTCMonth() + 1).toString().padStart(2, '0')
+  const day = now
+    .getUTCDate()
+    .toString()
+    .padStart(2, '0')
+
+  const newChangelog = `
+${header}
+## [${getVersion()}] - ${year}-${month}-${day}
+${body}
+  `.trim()
+
+  await writeFile(CHANGELOG_FILENAME, newChangelog + '\n')
+}
+
+update()