Added initial Dockerfiles.

linux-fresh/Dockerfile

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+FROM ubuntu:18.04
+MAINTAINER citra
+RUN apt-get update && apt-get -y full-upgrade
+RUN apt-get install -y build-essential libsdl2-dev qtbase5-dev libqt5opengl5-dev qtmultimedia5-dev qttools5-dev qttools5-dev-tools wget git ccache cmake

linux-frozen/Dockerfile

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+FROM ubuntu:18.04
+MAINTAINER citra
+RUN mkdir -p /tmp/pkgs
+COPY install_package.py /tmp/pkgs
+RUN apt-get update && apt-get install -y build-essential wget git python-launchpadlib ccache
+RUN cd /tmp/pkgs && python2 install_package.py \
+    libsdl2-dev 2.0.7+dfsg1-3ubuntu1 bionic          \
+    qtbase5-dev 5.9.3+dfsg-0ubuntu2 bionic           \
+    libqt5opengl5-dev 5.9.3+dfsg-0ubuntu2 bionic     \
+    qt5-qmltooling-plugins 5.9.3-0ubuntu1 bionic     \
+    qtdeclarative5-dev 5.9.3-0ubuntu1 bionic         \
+    qtmultimedia5-dev 5.9.3-0ubuntu3 bionic          \
+    libicu57 57.1-6ubuntu0.2 bionic                  \
+    cmake 3.10.2-1ubuntu2 bionic
+RUN rm -rf /tmp/pkgs

linux-frozen/install_package.py

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+#!/usr/bin/python
+
+import sys
+import re
+import subprocess
+from launchpadlib.launchpad import Launchpad
+
+if sys.version_info[0] > 2:
+    xrange = range
+
+cachedir = '/.launchpadlib/cache/'
+launchpad = Launchpad.login_anonymously(
+    'grab build info', 'production', cachedir, version='devel')
+
+processed_packages = []
+deb_file_list = []
+
+
+def get_url(pkg, distro):
+    build_ref = launchpad.archives.getByReference(reference='ubuntu').getPublishedBinaries(
+        binary_name=pkg[0], distro_arch_series='https://api.launchpad.net/devel/ubuntu/' + distro + '/amd64', version=pkg[1], exact_match=True, order_by_date=True).entries[0]
+    build_link = build_ref['build_link']
+    deb_name = '{}_{}_{}.deb'.format(pkg[0], pkg[1], 'amd64' if build_ref['architecture_specific'] else 'all')
+    deb_link = build_link + '/+files/' + deb_name
+    return [deb_link, deb_name]
+
+
+def list_dependencies(deb_file):
+    t = subprocess.check_output(
+        ['bash', '-c', '(dpkg -I {} | grep -oP "^ Depends\: \K.*$") || true'.format(deb_file)])
+    deps = [i.strip() for i in t.split(',')]
+    equals_re = re.compile(r'^(.*) \(= (.*)\)$')
+    return [equals_re.sub(r'\1=\2', i).split('=') for i in filter(equals_re.match, deps)]
+
+
+def get_package(pkg, distro):
+    if pkg in processed_packages:
+        return
+    print('Getting {}...'.format(pkg[0]))
+    url = get_url(pkg, distro)
+    subprocess.check_call(['wget', '--quiet', url[0], '-O', url[1]])
+    for dep in list_dependencies(url[1]):
+        get_package(dep, distro)
+    processed_packages.append(pkg)
+    deb_file_list.append('./' + url[1])
+
+
+for i in xrange(1, len(sys.argv), 3):
+    get_package([sys.argv[i], sys.argv[i + 1]], sys.argv[i + 2])
+
+subprocess.check_call(
+    ['apt-get', 'install', '-y', '--force-yes'] + deb_file_list)

linux-mingw/Dockerfile

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+FROM ubuntu:18.04
+MAINTAINER citra
+RUN apt-get update && apt-get install -y gpg wget git python3-pip ccache g++-mingw-w64-x86-64 gcc-mingw-w64-x86-64 mingw-w64-tools cmake
+# HACK: the repository does not contain necessary packages for 18.04, we'll use packages for 17.10 for now
+RUN echo 'deb http://ppa.launchpad.net/tobydox/mingw-w64/ubuntu artful main ' > /etc/apt/sources.list.d/extras.list
+RUN apt-key adv --keyserver keyserver.ubuntu.com --recv '72931B477E22FEFD47F8DECE02FE5F12ADDE29B2' && apt-get update
+RUN apt-get install -y sdl2-mingw-w64 qt5base-mingw-w64 qt5tools-mingw-w64 libsamplerate-mingw-w64 qt5multimedia-mingw-w64