+/* eslint-disable max-len */
+var fs = require('fs');
+var os = require('os');
+var path = require('path');
+var env = process.env;
+
+var ADBLOCK = is(env.ADBLOCK);
+var COLOR = is(env.npm_config_color);
+var DISABLE_OPENCOLLECTIVE = is(env.DISABLE_OPENCOLLECTIVE);
+var SILENT = ['silent', 'error', 'warn'].indexOf(env.npm_config_loglevel) !== -1;
+var OPEN_SOURCE_CONTRIBUTOR = is(env.OPEN_SOURCE_CONTRIBUTOR);
+var MINUTE = 60 * 1000;
+
+// you could add a PR with an env variable for your CI detection
+var CI = [
+ 'BUILD_NUMBER',
+ 'CI',
+ 'CONTINUOUS_INTEGRATION',
+ 'DRONE',
+ 'RUN_ID'
+].some(function (it) { return is(env[it]); });
+
+var BANNER = '\u001B[96mThank you for using core-js (\u001B[94m https://github.com/zloirock/core-js \u001B[96m) for polyfilling JavaScript standard library!\u001B[0m\n\n' +
+ '\u001B[96mThe project needs your help! Please consider supporting of core-js on Open Collective or Patreon: \u001B[0m\n' +
+ '\u001B[96m>\u001B[94m https://opencollective.com/core-js \u001B[0m\n' +
+ '\u001B[96m>\u001B[94m https://www.patreon.com/zloirock \u001B[0m\n\n' +
+ '\u001B[96mAlso, the author of core-js (\u001B[94m https://github.com/zloirock \u001B[96m) is looking for a good job -)\u001B[0m\n';
+
+function is(it) {
+ return !!it && it !== '0' && it !== 'false';
+}
+
+function isBannerRequired() {
+ if (ADBLOCK || CI || DISABLE_OPENCOLLECTIVE || SILENT || OPEN_SOURCE_CONTRIBUTOR) return false;
+ var file = path.join(os.tmpdir(), 'core-js-banners');
+ var banners = [];
+ try {
+ var DELTA = Date.now() - fs.statSync(file).mtime;
+ if (DELTA >= 0 && DELTA < MINUTE * 3) {
+ banners = JSON.parse(fs.readFileSync(file, 'utf8'));
+ if (banners.indexOf(BANNER) !== -1) return false;
+ }
+ } catch (error) {
+ banners = [];
+ }
+ try {
+ banners.push(BANNER);
+ fs.writeFileSync(file, JSON.stringify(banners), 'utf8');
+ } catch (error) { /* empty */ }
+ return true;
+}
+
+function showBanner() {
+ // eslint-disable-next-line no-console,no-control-regex
+ console.log(COLOR ? BANNER : BANNER.replace(/\u001B\[\d+m/g, ''));
+}
+
+if (isBannerRequired()) showBanner();