Add license banner to rollup builds (close #845)

Author: Paul Boocock

gulpfile.babel.js/build.js

@@ -3,7 +3,7 @@ import compiler from '@ampproject/rollup-plugin-closure-compiler';
 import cleanup from 'rollup-plugin-cleanup';
 import sizes from 'rollup-plugin-sizes';
 import filesize from 'rollup-plugin-filesize';
-import { rollupPlugins } from './rollup';
+import { basePlugins, spBannerPlugin } from './rollup';
 
 const minify = [
     compiler(), 
@@ -18,7 +18,7 @@ const report = [
 export const buildSp = async function () {
     const snowplow = await rollup({
         input: 'src/js/init.js',
-        plugins: [...rollupPlugins, ...minify, ...report],
+        plugins: [...basePlugins, ...minify, spBannerPlugin, ...report],
     });
 
     return await snowplow.write({

gulpfile.babel.js/rollup.js

@@ -1,8 +1,9 @@
 import { nodeResolve } from '@rollup/plugin-node-resolve';
 import commonjs from '@rollup/plugin-commonjs';
 import { babel } from '@rollup/plugin-babel';
+import banner from 'rollup-plugin-banner'
 
-export const rollupPlugins = [
+export const basePlugins = [
     nodeResolve({
         browser: true,
     }),
@@ -26,3 +27,12 @@ export const rollupPlugins = [
         ]
     })
 ];
+
+const licenseBanner = 
+"@description <%= pkg.description %>\n" +
+"@version     <%= pkg.version %>\n" +
+"@copyright   Anthon Pang, Snowplow Analytics Ltd\n" +
+"@license     <%= pkg.license %>\n\n" +
+"Documentation: http://bit.ly/sp-js";
+
+export const spBannerPlugin = banner(licenseBanner);

gulpfile.babel.js/test.js

@@ -1,11 +1,11 @@
 import { rollup } from 'rollup';
-import { rollupPlugins } from './rollup';
+import { basePlugins } from './rollup';
 import Docker from 'dockerode';
 
 export const buildTestDetectors = async function () {
     const detectors = await rollup({
         input: 'tests/scripts/detectors.js',
-        plugins: rollupPlugins,
+        plugins: basePlugins,
     });
     return await detectors.write({
         name: 'detectors',
@@ -17,7 +17,7 @@ export const buildTestDetectors = async function () {
 export const buildTestHelpers = async function () {
     const helpers = await rollup({
         input: 'tests/scripts/helpers.js',
-        plugins: rollupPlugins,
+        plugins: basePlugins,
     });
     return await helpers.write({
         name: 'helpers',
@@ -29,7 +29,7 @@ export const buildTestHelpers = async function () {
 export const buildTestSnowplow = async function () {
     const snowplow = await rollup({
         input: 'src/js/init.js',
-        plugins: [...rollupPlugins],
+        plugins: basePlugins,
     });
 
     return await snowplow.write({

package-lock.json

@@ -40,11 +40,11 @@
     "moment-timezone": "^0.5.26",
     "prettier": "^2.1.1",
     "rollup": "^2.26.11",
+    "rollup-plugin-banner": "^0.2.1",
     "rollup-plugin-cleanup": "^3.1.1",
     "rollup-plugin-filesize": "^9.0.2",
     "rollup-plugin-sizes": "^1.0.3",
     "saucelabs": "^3.0.0",
-    "semver": "^6.3.0",
     "wdio-chromedriver-service": "^5.0.2"
   },
   "contributors": [