add docker setup (#4)

Motivation:

We need the docker setup for CI.

Modifications:

Added docker setup. Started with swift-nio's setup and then removed
everything that we don't need (test, http, echo, integration-tests).

Result:

We can move forward doing CI.

Tests/NIOExtrasTests/QuiescingHelperTest+XCTest.swift

@@ -31,3 +31,4 @@ extension QuiescingHelperTest {
            ]
    }
 }
+

docker/Dockerfile

@@ -0,0 +1,61 @@
+ARG ubuntu_version=16.04
+FROM ubuntu:$ubuntu_version
+# needed to do again after FROM due to docker limitation
+ARG ubuntu_version
+
+ARG DEBIAN_FRONTEND=noninteractive
+# do not start services during installation as this will fail and log a warning / error.
+RUN echo "#!/bin/sh\nexit 0" > /usr/sbin/policy-rc.d
+
+# basic dependencies
+RUN apt-get update
+RUN apt-get install -y wget git build-essential software-properties-common pkg-config locales
+RUN apt-get install -y libicu-dev libblocksruntime0
+
+# local
+RUN locale-gen en_US.UTF-8
+RUN locale-gen en_US en_US.UTF-8
+RUN dpkg-reconfigure locales
+RUN echo 'export LANG=en_US.UTF-8' >> $HOME/.profile
+RUN echo 'export LANGUAGE=en_US:en' >> $HOME/.profile
+RUN echo 'export LC_ALL=en_US.UTF-8' >> $HOME/.profile
+
+# known_hosts
+RUN mkdir -p $HOME/.ssh
+RUN touch $HOME/.ssh/known_hosts
+RUN ssh-keyscan github.com 2> /dev/null >> $HOME/.ssh/known_hosts
+
+# clang
+RUN apt-get install -y clang-3.9
+RUN update-alternatives --install /usr/bin/clang clang /usr/bin/clang-3.9 100
+RUN update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-3.9 100
+
+# modern curl, if needed
+ARG install_curl_from_source
+RUN [ ! -z $install_curl_from_source ] || apt-get install -y curl libcurl3 libz-dev
+RUN [ -z $install_curl_from_source ] || apt-get install -y libssl-dev
+RUN [ -z $install_curl_from_source ] || mkdir $HOME/.curl
+RUN [ -z $install_curl_from_source ] || wget -q https://curl.haxx.se/download/curl-7.50.3.tar.gz -O $HOME/curl.tar.gz
+RUN [ -z $install_curl_from_source ] || tar xzf $HOME/curl.tar.gz --directory $HOME/.curl --strip-components=1
+RUN [ -z $install_curl_from_source ] || ( cd $HOME/.curl && ./configure --with-ssl && make && make install && cd - )
+RUN [ -z $install_curl_from_source ] || ldconfig
+
+# ruby and jazzy for docs generation
+RUN apt-add-repository -y ppa:brightbox/ruby-ng
+RUN apt-get update
+RUN apt-get install -y ruby2.4 ruby2.4-dev libsqlite3-dev
+RUN gem install jazzy --no-ri --no-rdoc
+
+# swift
+ARG swift_version=4.0.3
+RUN mkdir $HOME/.swift
+RUN wget -q https://swift.org/builds/swift-${swift_version}-release/ubuntu$(echo $ubuntu_version | sed 's/\.//g')/swift-${swift_version}-RELEASE/swift-${swift_version}-RELEASE-ubuntu${ubuntu_version}.tar.gz -O $HOME/swift.tar.gz
+RUN tar xzf $HOME/swift.tar.gz --directory $HOME/.swift --strip-components=1
+RUN echo 'export PATH="$HOME/.swift/usr/bin:$PATH"' >> $HOME/.profile
+RUN echo 'export LINUX_SOURCEKIT_LIB_PATH="$HOME/.swift/usr/lib"' >> $HOME/.profile
+
+# script to allow mapping framepointers on linux
+RUN mkdir -p $HOME/.scripts
+RUN wget -q https://raw.githubusercontent.com/apple/swift/master/utils/symbolicate-linux-fatal -O $HOME/.scripts/symbolicate-linux-fatal
+RUN chmod 755 $HOME/.scripts/symbolicate-linux-fatal
+RUN echo 'export PATH="$HOME/.scripts:$PATH"' >> $HOME/.profile

docker/docker-compose.1404.403.yaml

@@ -0,0 +1,14 @@
+version: "3"
+
+services:
+
+  runtime-setup:
+    image: swift-nio-extras:14.04-4.0.3
+    build:
+      args:
+        ubuntu_version : "14.04"
+        swift_version : "4.0.3"
+        install_curl_from_source: "true"
+
+  test:
+    image: swift-nio-extras:14.04-4.0.3

docker/docker-compose.1404.41.yaml

@@ -0,0 +1,14 @@
+version: "3"
+
+services:
+
+  runtime-setup:
+    image: swift-nio-extras:14.04-4.1
+    build:
+      args:
+        ubuntu_version : "14.04"
+        swift_version : "4.1"
+        install_curl_from_source: "true"
+
+  test:
+    image: swift-nio-extras:14.04-4.1

docker/docker-compose.1604.403.yaml

@@ -0,0 +1,13 @@
+version: "3"
+
+services:
+
+  runtime-setup:
+    image: swift-nio-extras:16.04-4.0.3
+    build:
+      args:
+        ubuntu_version : "16.04"
+        swift_version : "4.0.3"
+
+  test:
+    image: swift-nio-extras:16.04-4.0.3

docker/docker-compose.1604.41.yaml

@@ -0,0 +1,13 @@
+version: "3"
+
+services:
+
+  runtime-setup:
+    image: swift-nio-extras:16.04-4.1
+    build:
+      args:
+        ubuntu_version : "16.04"
+        swift_version : "4.1"
+
+  test:
+    image: swift-nio-extras:16.04-4.1

docker/docker-compose.yaml

@@ -0,0 +1,28 @@
+# this file is not designed to be run directly
+# instead, use the docker-compose.<os>.<swift> files
+# eg docker-compose -f docker/docker-compose.yaml -f docker/docker-compose.1604.41.yaml run test
+version: "3"
+
+services:
+
+  runtime-setup:
+    image: swift-nio-extras:default
+    build:
+      context: .
+      dockerfile: Dockerfile
+
+  common: &common
+    image: swift-nio-extras:default
+    depends_on: [runtime-setup]
+    volumes:
+      - ~/.ssh:/root/.ssh
+      - ..:/code
+    working_dir: /code
+
+  sanity:
+    <<: *common
+    command: /bin/bash -cl "./scripts/sanity.sh"
+
+  test:
+    <<: *common
+    command: /bin/bash -cl "swift test"