chore: add postinstall script

Author: woothu

npm-postinstall.js

@@ -0,0 +1,59 @@
+#!/usr/bin/env node
+
+const pkg = require(require('path').resolve('./package.json'))
+
+let packageJson = null
+try {
+ packageJson = require(require('path').resolve('../../../package.json'))
+} catch (e) {
+
+}
+
+const log = console.log
+
+const VERSIONS = {
+  '@coreui/coreui': {
+    url: 'https://coreui.io/pro/',
+    name: 'CoreUI CSS library'
+  },
+  '@coreui/angular': {
+    url: 'https://coreui.io/pro/angular/',
+    name: 'CoreUI Angular components library',
+    docs: 'https://coreui.io/angular/docs/'
+  },
+  '@coreui/react': {
+    url: 'https://coreui.io/pro/react/',
+    name: 'CoreUI React components library',
+    docs: 'https://coreui.io/react/docs/introduction'
+  },
+  '@coreui/vue': {
+    url: 'https://coreui.io/pro/vue/',
+    name: 'CoreUI Vue components library',
+    docs: 'https://coreui.io/vue/docs/introduction/'
+  },
+}
+
+log('\x1b[32m')
+log(`\x1b[1mThank you for using ${VERSIONS[pkg.name].name}! \x1b[22m`)
+log(`${VERSIONS[pkg.name].name} is an MIT licensed open source project and ` +
+`completely free to use. However, the amount of effort needed to maintain ` +
+`and develop new features for the project is not sustainable without proper ` +
+`financial backing. You can support development by buying Pro Version: ` +
+`\x1b[4m${VERSIONS[pkg.name].url}\x1b[24m]`)
+log('\x1b[39m')
+
+const isFramework = VERSIONS[pkg.name].name !== '@coreui/coreui'
+const haveStyles = packageJson && 
+  packageJson.dependencies && 
+    (
+      packageJson.dependencies['@coreui/coreui'] ||
+      packageJson.dependencies['@coreui/coreui-pro']
+    )
+
+if (isFramework && !haveStyles) {
+  log(`\x1b[1m\x1b[31mError: You don't have '@coreui/coreui' CSS library installed in ` +
+  `package.json dependencies section. You need to import it in order to style ` +
+  `CoreUI components. Installation docs: ${VERSIONS[pkg.name].docs} \n \x1b[0m`
+  )
+  // ` \x1b[33m`
+}

package.json

@@ -26,7 +26,8 @@
     "src/",
     "tests/",
     "umd/",
-    "README.md"
+    "README.md",
+    "npm-postinstall.js"
   ],
   "scripts": {
     "clean": "nwb clean-module && nwb clean-demo",
@@ -38,7 +39,8 @@
     "changelog": "auto-changelog --starting-version 3.0.0-rc.2 --commit-limit false --hide-credit",
     "build": "npm run build:lib && npm run build:esm",
     "build:lib": "rollup --environment BUNDLE:false --c --sourcemap",
-    "build:esm": "cross-env BABEL_ENV=esm-dir babel src --out-dir es --copy-files"
+    "build:esm": "cross-env BABEL_ENV=esm-dir babel src --out-dir es --copy-files",
+    "postinstall": "node npm-postinstall"
   },
   "dependencies": {
     "@babel/runtime": "^7.10.5",