CI: build a Mesa shapshot for getImage/putImage on pbuffer swrast

c7617d8908
is necessary for running GL-renderer with llvmpipe in Gitlab CI.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

.gitlab-ci.yml

@@ -5,7 +5,7 @@ variables:
   DEBIAN_VERSION: buster
   DEBIAN_EXEC: 'bash .gitlab-ci/debian-install.sh'
 
-  DEBIAN_TAG: '2019-12-13.0'
+  DEBIAN_TAG: '2020-02-18.1'
   DEBIAN_CONTAINER_IMAGE: $CI_REGISTRY_IMAGE/debian/$DEBIAN_VERSION:$DEBIAN_TAG
 
 

.gitlab-ci/debian-install.sh

@@ -2,6 +2,24 @@
 
 set -o xtrace -o errexit
 
+# These get temporary installed for building Mesa and then force-removed.
+MESA_DEV_PKGS="
+	bison
+	flex
+	gettext
+	libwayland-egl-backend-dev
+	libxrandr-dev
+	llvm-8-dev
+	python-mako
+	python3-mako
+	wayland-protocols
+"
+
+# Needed for running the custom-built mesa
+MESA_RUNTIME_PKGS="
+	libllvm8
+"
+
 echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list
 apt-get update
 apt-get -y --no-install-recommends install \
@@ -57,9 +75,11 @@ apt-get -y --no-install-recommends install \
 	python3-pip \
 	python3-setuptools \
 	xwayland \
+	$MESA_RUNTIME_PKGS
 
 
 pip3 install --user git+https://github.com/mesonbuild/meson.git@0.49
+export PATH=$HOME/.local/bin:$PATH
 # for documentation
 pip3 install sphinx==2.1.0 --user
 pip3 install breathe==4.13.0.post0 --user
@@ -75,5 +95,16 @@ cd build
 make install
 cd ../../
 
+apt-get -y --no-install-recommends install $MESA_DEV_PKGS
+git clone --single-branch --branch master --shallow-since='2020-02-15' https://gitlab.freedesktop.org/mesa/mesa.git mesa
+cd mesa
+git checkout -b snapshot c7617d8908a970124321ce731b43d5996c3c5775
+meson build -Dauto_features=disabled \
+	-Dgallium-drivers=swrast -Dvulkan-drivers= -Ddri-drivers=
+ninja -C build install
+cd ..
+rm -rf mesa
+apt-get -y --autoremove purge $MESA_DEV_PKGS
+
 mkdir -p /tmp/.X11-unix
 chmod 777 /tmp/.X11-unix