Add release script

Author: Hyunje Jun

package.json

@@ -43,7 +43,7 @@
     "watch": "npm run build && SHELL=/bin/bash chokidar 'src/**/*.js' -c 'npm run format && npm run build'",
     "format": "prettier --write --single-quote --trailing-comma es5 'src/**/*.js'",
     "format:lint": "prettier -l --single-quote --trailing-comma es5 'src/**/*.js'",
-    "pages:update": "cp css/perfect-scrollbar.css dist/perfect-scrollbar.min.js docs/"
+    "release": "./release"
   },
   "license": "MIT"
 }

release

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+# Check updated version
+if git --no-pager diff --exit-code package.json; then
+  echo 'No version update'
+  exit 1
+fi
+
+# Update lock and rebuild
+npm install
+npm run build
+
+# Update gh-pages
+cp css/perfect-scrollbar.css dist/perfect-scrollbar.min.js docs/
+
+# Create commit message
+version=$(node -e "console.log(require('./package.json').version)")
+message="v$version
+
+Please refer to Releases for changelog.
+
+https://github.com/utatti/perfect-scrollbar/releases"
+
+# Commit, tag, and show detail and file names
+git commit . -m "$message"
+git show
+git tag $version
+git --no-pager show --pretty=format:'%Cred%h %Cgreen%an %Creset%s' --name-status