Add Dockerfile, .travis.yml; Enable CI.

.dockerignore

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+docker-images
+.git

.travis.yml

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+#    This file is part of darktable.
+#    copyright (c) 2016 Roman Lebedev.
+#
+#    darktable is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    darktable is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with darktable.  If not, see <http://www.gnu.org/licenses/>.
+
+sudo: required
+
+services:
+  - docker
+
+before_install:
+#  - docker build -t lebedevri/darktable-travis .
+  - docker pull lebedevri/darktable-travis
+
+script:
+  - docker run -v $PWD:/build/darktable -w /build/darktable -e CC=gcc -e CXX=g++ lebedevri/darktable-travis sh -c "cd /build/darktable && rm -rf /build/darktable/build && mkdir /build/darktable/build && cd /build/darktable/build && cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ../ && make"
+  - docker run -v $PWD:/build/darktable -w /build/darktable -e CC=clang-3.8 -e CXX=clang++-3.8 lebedevri/darktable-travis sh -c "cd /build/darktable && rm -rf /build/darktable/build && mkdir /build/darktable/build && cd /build/darktable/build && cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ../ && make"

Dockerfile

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+#    This file is part of darktable.
+#    copyright (c) 2016 Roman Lebedev.
+#
+#    darktable is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    darktable is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with darktable.  If not, see <http://www.gnu.org/licenses/>.
+
+# docker build -t darktable-travis .
+
+FROM debian:testing
+MAINTAINER Roman Lebedev <[email protected]>
+
+ENV DEBIAN_FRONTEND noninteractive
+
+# Paper over occasional network flakiness of some mirrors.
+RUN echo 'APT::Acquire::Retries "5";' > /etc/apt/apt.conf.d/80retry
+
+# Do not install recommended packages
+RUN echo 'APT::Install-Recommends "false";' > /etc/apt/apt.conf.d/80recommends
+
+# Do not install suggested packages
+RUN echo 'APT::Install-Suggests "false";' > /etc/apt/apt.conf.d/80suggests
+
+# Assume yes
+RUN echo 'APT::Get::Assume-Yes "true";' > /etc/apt/apt.conf.d/80forceyes
+
+# Fix broken packages
+RUN echo 'APT::Get::Fix-Missing "true";' > /etc/apt/apt.conf.d/80fixmissin
+
+RUN apt-get update && \
+    apt-get install clang-3.8 cmake desktop-file-utils g++ gcc gettext git \
+    intltool libatk1.0-dev libcairo2-dev libcolord-dev libcolord-gtk-dev \
+    libcups2-dev libcurl4-gnutls-dev libexiv2-dev libflickcurl-dev \
+    libgdk-pixbuf2.0-dev libglib2.0-dev libgphoto2-dev libgraphicsmagick1-dev \
+    libgtk-3-dev libjpeg-dev libjson-glib-dev liblcms2-dev liblensfun-dev \
+    liblua5.2-dev libopenexr-dev libopenjp2-7-dev libosmgpsmap-1.0-dev \
+    libpango1.0-dev libpng-dev libpugixml-dev librsvg2-dev libsaxon-java \
+    libsdl1.2-dev libsecret-1-dev libsoup2.4-dev libsqlite3-dev libtiff5-dev \
+    libwebp-dev libx11-dev libxml2-dev libxml2-utils make perl po4a xsltproc && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*