DOCSP-4384 Add analytics snippet to hosted docs (#102)

This adds the analytics snippet when the docs are hosted.

build.gradle

@@ -454,6 +454,14 @@ rootProject.gradle.projectsEvaluated {
         options.group "Server SDK", serverPackages.join(':')
         options.group "Core SDK", corePackages.join(':')
 
+        if (project.hasProperty("analytics")) {
+            println "Building with analytics."
+            options.header = new File(configDir, 'header.html').text
+            options.addBooleanOption("-allow-script-in-comments", true)
+        } else {
+            println "Building without analytics. Use -Panalytics to enable analytics."
+        }
+
         String androidDocsDir = ""
         subprojects {
             project.tasks.withType(Javadoc).each { javadocTask ->

config/header.html

@@ -0,0 +1,9 @@
+<script>
+  !function(){var analytics=window.analytics=window.analytics||[];if(!analytics.initialize)if(analytics.invoked)window.console&&console.error&&console.error("Segment snippet included twice.");else{analytics.invoked=!0;analytics.methods=["trackSubmit","trackClick","trackLink","trackForm","pageview","identify","reset","group","track","ready","alias","debug","page","once","off","on"];analytics.factory=function(t){return function(){var e=Array.prototype.slice.call(arguments);e.unshift(t);analytics.push(e);return analytics}};for(var t=0;t<analytics.methods.length;t++){var e=analytics.methods[t];analytics[e]=analytics.factory(e)}analytics.load=function(t,e){var n=document.createElement("script");n.type="text/javascript";n.async=!0;n.src="https://cdn.segment.com/analytics.js/v1/"+t+"/analytics.min.js";var a=document.getElementsByTagName("script")[0];a.parentNode.insertBefore(n,a);analytics._loadOptions=e};analytics.SNIPPET_VERSION="4.1.0";
+  analytics.load("aGhVvyxnPWlyP71vVl9ZjGWxAtoVGLXX");
+  analytics.page({
+    project: 'stitch-android-sdk',
+    branch: 'v4.2',
+  });
+  }}();
+</script>

contrib/bump_version.bash

@@ -103,7 +103,7 @@ echo "uploading to bintray..."
 ./gradlew bintrayUpload
 
 echo "pushing to docs..."
-./gradlew allJavadocs
+./gradlew allJavadocs -Panalytics
 
 if ! which aws; then
    echo "aws CLI not found. see: https://docs.aws.amazon.com/cli/latest/userguide/installing.html"