tools,doc: add Google Analytics tracking.

Adds Google Analytics tracking script to all doc pages when
`DOCS_ANALYTICS` is set when running `make`:

```bash
$ DOCS_ANALYTICS=<GOOGLE ANALYTICS ID> make
```

By default (when `DOCS_ANALYTICS` is not set), no tracking scripts are
included.

It respects "Do Not Track" settings end users might have in their
browser.

Also changes make target `doc-upload` from depending on the
`$(TARBALL)` target, to only depend on `doc` directly.

PR-URL: https://github.com/nodejs/node/pull/6601
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/tools/doc/generate.js b/tools/doc/generate.js
index 31b23c52a0..b7fcf0d4f9 100644
--- a/tools/doc/generate.js
+++ b/tools/doc/generate.js
@@ -11,16 +11,19 @@ let format = 'json';
 let template = null;
 let inputFile = null;
 let nodeVersion = null;
+let analytics = null;
 
 args.forEach(function(arg) {
-  if (!arg.match(/^--/)) {
+  if (!arg.startsWith('--')) {
     inputFile = arg;
-  } else if (arg.match(/^--format=/)) {
+  } else if (arg.startsWith('--format=')) {
     format = arg.replace(/^--format=/, '');
-  } else if (arg.match(/^--template=/)) {
+  } else if (arg.startsWith('--template=')) {
     template = arg.replace(/^--template=/, '');
-  } else if (arg.match(/^--node-version=/)) {
+  } else if (arg.startsWith('--node-version=')) {
     nodeVersion = arg.replace(/^--node-version=/, '');
+  } else if (arg.startsWith('--analytics=')) {
+    analytics = arg.replace(/^--analytics=/, '');
   }
 });
 
@@ -54,6 +57,7 @@ function next(er, input) {
           filename: inputFile,
           template: template,
           nodeVersion: nodeVersion,
+          analytics: analytics,
         },
 
         function(er, html) {