add release-notes and release-channel scripts

Author: RobinMalfait

package.json

@@ -24,7 +24,9 @@
     "pretest": "node scripts/install-fixture-deps.js",
     "test": "jest",
     "prepublishOnly": "npm run build && npm test && node scripts/copy-licenses.js",
-    "format": "prettier \"src/**/*.js\" \"scripts/**/*.js\" \"tests/test.js\" --write --print-width 100 --single-quote --no-semi --plugin-search-dir ./tests"
+    "format": "prettier \"src/**/*.js\" \"scripts/**/*.js\" \"tests/test.js\" --write --print-width 100 --single-quote --no-semi --plugin-search-dir ./tests",
+    "release-channel": "node ./scripts/release-channel.js",
+    "release-notes": "node ./scripts/release-notes.js"
   },
   "devDependencies": {
     "@ianvs/prettier-plugin-sort-imports": "^3.7.0",

scripts/release-channel.js

@@ -0,0 +1,20 @@
+// Given a version, figure out what the release channel is so that we can publish to the correct
+// channel on npm.
+//
+// E.g.:
+//
+//   1.2.3                  -> latest (default)
+//   0.0.0-insiders.ffaa88  -> insiders
+//   4.1.0-alpha.4          -> alpha
+
+let version =
+  process.argv[2] ||
+  process.env.npm_package_version ||
+  require('../package.json').version
+
+let match = /\d+\.\d+\.\d+-(.*)\.\d+/g.exec(version)
+if (match) {
+  console.log(match[1])
+} else {
+  console.log('latest')
+}

scripts/release-notes.js

@@ -0,0 +1,26 @@
+// Given a version, figure out what the release notes are so that we can use this to pre-fill the
+// relase notes on a GitHub release for the current version.
+
+let path = require('path')
+let fs = require('fs')
+
+let version =
+  process.argv[2] ||
+  process.env.npm_package_version ||
+  require('../package.json').version
+
+let changelog = fs.readFileSync(
+  path.resolve(__dirname, '..', 'CHANGELOG.md'),
+  'utf8',
+)
+let match = new RegExp(
+  `## \\[${version}\\] - (.*)\\n\\n([\\s\\S]*?)\\n(?:(?:##\\s)|(?:\\[))`,
+  'g',
+).exec(changelog)
+
+if (match) {
+  let [, , notes] = match
+  console.log(notes.trim())
+} else {
+  console.log(`Placeholder release notes for version: v${version}`)
+}