CI: Build documentation

Update the CI build environment to install doxygen and graphviz. Deploy the
generated documentation as pages.
Signed-off-by: Aaron Plattner <aplattner@nvidia.com>

.gitlab-ci.yml

-image: docker:latest
-services:
-    - docker:dind
+image: archlinux/base:latest
 
-before_script:
-    - echo FROM nwnk/xserver-travis-rawhide:v5 > Dockerfile
-    - echo ADD . /root >> Dockerfile
-    - echo WORKDIR /root >> Dockerfile
-    - docker build -t withgit .
+stages:
+ - build
+ - deploy
 
-job:
+build:
+  stage: build
   script:
-        - docker run --volume $HOME/.ccache:/root/.ccache withgit ./test/gitlab-ci.sh
+      - pacman --noconfirm -Sy gcc meson ninja pkg-config doxygen graphviz texlive-bin
+      - ./test/gitlab-ci.sh
+  artifacts:
+    paths:
+      - public
+
+pages:
+  stage: deploy
+  script:
+    - echo "Nothing to do"
+  artifacts:
+    paths:
+      - public
+  only:
+   - master

test/gitlab-ci.sh

 #!/bin/sh
-set -x
+set -xe
 
 meson setup build/
-meson configure -Dprefix=/usr -Ddri2=true build/
+meson configure -Dprefix=/usr -Ddri2=true -Ddocumentation=true build/
 ninja -C build/ install test
+cp -av build/doc/html public/