Added multiversion command to CircleCI and README.

Signed-off-by: Leander Stephen D'Souza <[email protected]>

Author: leander-dsouza

.circleci/config.yml

@@ -20,10 +20,16 @@ references:
           python3-pip \
           ttf-dejavu
         pip3 install -r requirements.txt
-  make_docs: &make_docs
+  make_local_docs: &make_local_docs
     run:
+      name: Build local docs
       command: |
         make html
+  make_docs: &make_docs
+    run:
+      name: Build multiversion docs
+      command: |
+        make clean multiversion
   store_docs: &store_docs
     store_artifacts:
         path: _build/html
@@ -45,6 +51,7 @@ commands:
   build_docs:
     description: "Build docs"
     steps:
+      - *make_local_docs
       - *make_docs
       - *store_docs
   publish_docs_to_gh_pages_branch:

README.md

@@ -33,6 +33,9 @@ pip3 install -r requirements.txt
 ### Build the Docs
 Build the docs locally with `make html` and you'll find the built docs entry point in `_build/html/index.html`.
 
+For building the deployed version of the docs, `make multiversion` will build the documentation for all supported branches of Nav2, ignoring the changes locally.
+To include your local changes, make sure to merge locally with the supported branch you want to build against.
+
 Any images, diagrams, or videos are subject to their own copyrights, trademarks, and licenses.
 
 Want a local PDF version? Follow the [instructions here](https://gist.github.com/alfredodeza/7fb5c667addb1c6963b9).