From 192a58ab518de9322b5a8f9f0f52e4692ca16f5f Mon Sep 17 00:00:00 2001
From: Michael Terry <mterry@edx.org>
Date: Fri, 24 Sep 2021 10:09:17 -0400
Subject: [PATCH] fix: hardcode the newrelic agent, to load it earlier (#652)

This is a test, before making a more proper fix in frontend-build.
But I'd like to confirm this fixes some issues we've seen with
newrelic metrics.

AA-1015
---
 public/index.html      | 10 ++++++++++
 webpack.prod.config.js | 18 ++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 webpack.prod.config.js

diff --git a/public/index.html b/public/index.html
index 25011915..76071ce7 100644
--- a/public/index.html
+++ b/public/index.html
@@ -5,6 +5,16 @@
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <link rel="shortcut icon" href="<%=htmlWebpackPlugin.options.FAVICON_URL%>" type="image/x-icon" />
+
+    <% if (process.env.NEW_RELIC_ACCOUNT_ID) { %>
+      <script>
+        ;window.NREUM||(NREUM={});NREUM.init={privacy:{cookies_enabled:true}};
+        window.NREUM||(NREUM={}),__nr_require=function(t,e,n){function r(n){if(!e[n]){var i=e[n]={exports:{}};t[n][0].call(i.exports,function(e){var i=t[n][1][e];return r(i||e)},i,i.exports)}return e[n].exports}if("function"==typeof __nr_require)return __nr_require;for(var i=0;i<n.length;i++)r(n[i]);return r}({1:[function(t,e,n){function r(t){try{s.console&&console.log(t)}catch(e){}}var i,o=t("ee"),a=t(25),s={};try{i=localStorage.getItem("__nr_flags").split(","),console&&"function"==typeof console.log&&(s.console=!0,i.indexOf("dev")!==-1&&(s.dev=!0),i.indexOf("nr_dev")!==-1&&(s.nrDev=!0))}catch(c){}s.nrDev&&o.on("internal-error",function(t){r(t.stack)}),s.dev&&o.on("fn-err",function(t,e,n){r(n.stack)}),s.dev&&(r("NR AGENT IN DEVELOPMENT MODE"),r("flags: "+a(s,function(t,e){return t}).join(", ")))},{}],2:[function(t,e,n){function r(t,e,n,r,s){try{p?p-=1:i(s||new UncaughtException(t,e,n),!0)}catch(f){try{o("ierr",[f,c.now(),!0])}catch(d){}}return"function"==typeof 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b=""+location,E={beacon:"bam.nr-data.net",errorBeacon:"bam.nr-data.net",agent:"js-agent.newrelic.com/nr-1209.min.js"},R=g&&y&&y[w]&&!/CriOS/.test(navigator.userAgent),O=e.exports={offset:a.getLastTimestamp(),now:a,origin:b,features:{},xhrWrappable:R,userAgent:u,disabled:x};if(!x){t(15),t(21),m[w]?(m[w]("DOMContentLoaded",o,!1),h[w]("load",r,!1)):(m[v]("onreadystatechange",i),h[v]("onload",r)),s("mark",["firstbyte",a.getLastTimestamp()],null,"api");var S=0}},{}],"wrap-function":[function(t,e,n){function r(t,e){function n(e,n,r,c,f){function nrWrapper(){var o,a,u,l;try{a=this,o=d(arguments),u="function"==typeof r?r(o,a):r||{}}catch(p){i([p,"",[o,a,c],u],t)}s(n+"start",[o,a,c],u,f);try{return l=e.apply(a,o)}catch(h){throw s(n+"err",[o,a,h],u,f),h}finally{s(n+"end",[o,a,l],u,f)}}return a(e)?e:(n||(n=""),nrWrapper[l]=e,o(e,nrWrapper,t),nrWrapper)}function r(t,e,r,i,o){r||(r="");var s,c,f,u="-"===r.charAt(0);for(f=0;f<e.length;f++)c=e[f],s=t[c],a(s)||(t[c]=n(s,u?c+r:r,i,c,o))}function 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+        ;NREUM.loader_config={accountID:"<%=process.env.NEW_RELIC_ACCOUNT_ID%>",trustKey:"<%=process.env.NEW_RELIC_TRUST_KEY%>",agentID:"<%=process.env.NEW_RELIC_AGENT_ID%>",licenseKey:"<%=process.env.NEW_RELIC_LICENSE_KEY%>",applicationID:"<%=process.env.NEW_RELIC_APP_ID%>"}
+        ;NREUM.info={beacon:"bam-cell.nr-data.net",errorBeacon:"bam-cell.nr-data.net",licenseKey:"<%=process.env.NEW_RELIC_LICENSE_KEY%>",applicationID:"<%=process.env.NEW_RELIC_APP_ID%>",sa:1}
+      </script>
+    <% } %>
+
     <% if (htmlWebpackPlugin.options.OPTIMIZELY_PROJECT_ID) { %>
       <script src="https://www.edx.org/optimizelyjs/<%= htmlWebpackPlugin.options.OPTIMIZELY_PROJECT_ID %>.js"></script>
     <% } %>
diff --git a/webpack.prod.config.js b/webpack.prod.config.js
new file mode 100644
index 00000000..b91fa479
--- /dev/null
+++ b/webpack.prod.config.js
@@ -0,0 +1,18 @@
+const { getBaseConfig } = require('@edx/frontend-build');
+
+const config = getBaseConfig('webpack-prod');
+
+// Filter plugins in the preset config that we don't want
+function filterPlugins(plugins) {
+  const pluginsToRemove = [
+    'a', // "a" is the constructor name of HtmlWebpackNewRelicPlugin
+  ];
+  return plugins.filter(plugin => {
+    const pluginName = plugin.constructor && plugin.constructor.name;
+    return !pluginsToRemove.includes(pluginName);
+  });
+}
+
+config.plugins = filterPlugins(config.plugins);
+
+module.exports = config;