gitlab-ci: Install doxygen/sphinx/breathe and enable building documentation

Pinned down sphinx to 2.1.0 and breathe to 4.13.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>

.gitlab-ci.yml

@@ -5,7 +5,7 @@ variables:
   DEBIAN_VERSION: stretch
   DEBIAN_EXEC: 'bash .gitlab-ci/debian-install.sh'
 
-  DEBIAN_TAG: '2019-03-28.0'
+  DEBIAN_TAG: '2019-06-14.0'
   DEBIAN_CONTAINER_IMAGE: $CI_REGISTRY_IMAGE/debian/$DEBIAN_VERSION:$DEBIAN_TAG
 
 
@@ -51,7 +51,7 @@ build-native-meson:
   script:
   - export PATH=~/.local/bin:$PATH
   - cd "$BUILDDIR"
-  - meson --prefix="$PREFIX" -Dsimple-dmabuf-drm=intel -Dwerror=true ..
+  - meson --prefix="$PREFIX" -Dsimple-dmabuf-drm=intel -Dwerror=true -Ddoc=true ..
   - ninja -k0
   - ninja install
   - ninja test

.gitlab-ci/debian-install.sh

@@ -4,9 +4,13 @@ set -o xtrace
 
 echo 'deb http://deb.debian.org/debian stretch-backports main' >> /etc/apt/sources.list
 apt-get update
-apt-get -y --no-install-recommends install build-essential automake autoconf libtool pkg-config libexpat1-dev libffi-dev libxml2-dev libpixman-1-dev libpng-dev libjpeg-dev libcolord-dev mesa-common-dev libglu1-mesa-dev libegl1-mesa-dev libgles2-mesa-dev libwayland-dev libxcb1-dev libxcb-composite0-dev libxcb-xfixes0-dev libxcb-xkb-dev libx11-xcb-dev libx11-dev libudev-dev libgbm-dev libxkbcommon-dev libcairo2-dev libpango1.0-dev libgdk-pixbuf2.0-dev libxcursor-dev libmtdev-dev libpam0g-dev libvpx-dev libsystemd-dev libevdev-dev libinput-dev libwebp-dev libjpeg-dev libva-dev liblcms2-dev git libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev freerdp2-dev curl python3-pip python3-setuptools ninja-build
+apt-get -y --no-install-recommends install build-essential automake autoconf libtool pkg-config libexpat1-dev libffi-dev libxml2-dev libpixman-1-dev libpng-dev libjpeg-dev libcolord-dev mesa-common-dev libglu1-mesa-dev libegl1-mesa-dev libgles2-mesa-dev libwayland-dev libxcb1-dev libxcb-composite0-dev libxcb-xfixes0-dev libxcb-xkb-dev libx11-xcb-dev libx11-dev libudev-dev libgbm-dev libxkbcommon-dev libcairo2-dev libpango1.0-dev libgdk-pixbuf2.0-dev libxcursor-dev libmtdev-dev libpam0g-dev libvpx-dev libsystemd-dev libevdev-dev libinput-dev libwebp-dev libjpeg-dev libva-dev liblcms2-dev git libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev freerdp2-dev curl python3-pip python3-setuptools doxygen ninja-build
 
 pip3 install --user git+https://github.com/mesonbuild/meson.git@0.49
+# for documentation
+pip3 install sphinx==2.1.0 --user
+pip3 install breathe==4.13.0.post0 --user
+pip3 install sphinx_rtd_theme==0.4.3 --user
 
 mkdir -p /tmp/.X11-unix
 chmod 777 /tmp/.X11-unix