travis: add docker based cmake build job

Until now we were only running the python unit tests.

It seems desirable to also check that the CMake based build compiles
successfully. We do that now using docker.

The docker build can be tweaked with some environment variables and,
also, be stored in the docker hub if desired. Check the changes for
extra details regarding these variables.

v2: Removed other build possibilities other than just from inside
    Travis-CI, as suggested by Juan.
v3: Replaced the "RELEASE" parameter to create the docker image with
    "PARENT" and removed some unneeded documentation after v2, as
    suggested by Juan.
v4:
  - Use DOCKER_PARENT, DOCKER_IMAGE and DOCKER_TAG variables from the
    custom Travis-CI setup to define the PARENT, IMAGE and TAG
    parameters during the docker image creation.
  - Upload the image only if DOCKER_IMAGE and DOCKER_TAG are set.

Cc: Dylan Baker <dylan@pnwbakers.com>
Cc: Juan A. Suarez <jasuarez@igalia.com>
Signed-off-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Acked-by: Eric Anholt <eric@anholt.net>
Acked-by: Dylan Baker <dylan@pnwbakers.com>

2 files changed, 118 insertions, 3 deletions

diff --git a/.travis.yml b/.travis.yml
index b47829ff9..b4cbcca49 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,16 @@
+sudo: false
+os: linux
 language: python
-cache: pip
+cache:
+  - ccache
+  - pip
+services:
+  - docker
+
+env:
+  global:
+    - BUILD=pytest
+
 matrix:
   include:
     - python: 2.7
@@ -12,7 +23,37 @@ matrix:
       env: TOX_ENV="py35-{generator,noaccel,accel-nix,streams}"
     - python: 3.6
       env: TOX_ENV="py36-{generator,noaccel,accel-nix,streams}"
+    - env: BUILD=cmake
+
 install:
-    pip install tox
+  - |
+    if [[ $BUILD == pytest ]]; then
+      pip install tox
+    else
+      wget https://github.com/grammarly/rocker/releases/download/1.3.1/rocker-1.3.1-linux_amd64.tar.gz
+      tar xvf rocker-1.3.1-linux_amd64.tar.gz
+      rm rocker-1.3.1-linux_amd64.tar.gz
+    fi
+
+before_script:
+  - |
+    if [[ $BUILD != pytest ]]; then
+      mkdir -p -m777 ~/.ccache
+    fi
+
 script:
-    - tox -e $TOX_ENV
+  - |
+    if [[ $BUILD == pytest ]]; then
+      tox -e $TOX_ENV
+    else
+      ./rocker build -f docker/Rockerfile.piglit ${DOCKER_TAG:+--var TAG=}${DOCKER_TAG} ${DOCKER_IMAGE:+--var IMAGE=}${DOCKER_IMAGE} ${DOCKER_PARENT:+--var PARENT=}${DOCKER_PARENT} .
+    fi
+
+after_success:
+  - |
+    if [[ $BUILD != pytest ]]; then
+      if [[ -n $DOCKER_IMAGE && -n $DOCKER_TAG && -n $DOCKER_USERNAME && $TRAVIS_BRANCH == master ]]; then
+        docker login -u "${DOCKER_USERNAME}" -p "${DOCKER_PASSWORD}"
+        docker push "${DOCKER_IMAGE}":"${DOCKER_TAG}"
+      fi
+    fi
diff --git a/docker/Rockerfile.piglit b/docker/Rockerfile.piglit
new file mode 100644
index 000000000..0d8f8bb45
--- /dev/null
+++ b/docker/Rockerfile.piglit
@@ -0,0 +1,74 @@
+#
+# This builds Piglit.
+#
+# ~~~
+#  rocker build -f Rockerfile.piglit [--attach]                                 \
+#    [--var IMAGE=freedesktop/mesa] # freedesktop/mesa, myrepo/myproyect, ...   \
+#    [--var TAG=piglit]             # piglit-17.0, piglit-13.0, ...             \
+#    [--var PARENT=ubuntu:xenial]   # ubuntu:xenial, freedesktop/mesa:17.3, ...
+# ~~~
+#
+# Environment variables that are used in the build:
+#  - MAKEFLAGS: flags to pass to make (e.g., "-j8")
+#  - CCACHE_DIR: ccache directory (default: ~/.ccache)
+#
+# To run
+#
+# ~~~
+#   mkdir -p -m777 ~/my_results_dir
+#   docker run --privileged --rm -t -v ~/my_results_dir:/results:Z  \
+#              -v /tmp/.X11-unix:/tmp/.X11-unix freedesktop/mesa:piglit
+# ~~~
+#
+
+{{ $image := (or .IMAGE "freedesktop/mesa") }}
+{{ $parent_image := (or .PARENT "ubuntu:xenial") }}
+{{ $ccachedir := (or .Env.CCACHE_DIR "~/.ccache") }}
+
+FROM {{ $parent_image }}
+
+LABEL maintainer "Andres Gomez <agomez@igalia.com>"
+
+USER root
+
+ENV LC_ALL=C.UTF-8
+
+RUN apt-get update                                                      \
+  && apt-get -y --no-install-recommends install sudo gcc g++ ccache     \
+    git pkg-config bash-completion cmake                                \
+    libz-dev libpng-dev libgl-dev libegl1-mesa-dev libwaffle-dev        \
+    python3-setuptools python3-pip                                      \
+  && rm -fr /var/lib/apt/lists/*
+
+RUN pip3 install numpy six mako
+
+RUN getent passwd local > /dev/null || adduser --gecos "" local && passwd -d local && adduser local sudo
+
+USER local
+
+{{ if .Env.MAKEFLAGS }}
+ENV MAKEFLAGS={{ .Env.MAKEFLAGS }}
+{{ end }}
+
+WORKDIR /home/local
+
+MOUNT {{ $ccachedir }}:/home/local/.ccache:Z
+
+RUN sudo chown -R local:local /home/local/.ccache
+
+ENV PATH=/usr/lib/ccache:$PATH
+
+ADD . /home/local/piglit
+RUN sudo chown -R local:local /home/local/piglit
+
+WORKDIR /home/local/piglit
+
+ATTACH [ "/bin/bash" ]
+
+RUN cmake . && cmake --build .
+
+VOLUME /results
+
+{{ if .TAG }}
+TAG {{ $image }}:{{ .TAG }}
+{{ end }}