Add Brew formula (#16)

HomebrewFormula/coredns.rb

@@ -0,0 +1,107 @@
+require "language/go"
+
+class Coredns < Formula
+  desc "DNS server that chains plugins"
+  homepage "https://coredns.io"
+  url "https://github.com/coredns/coredns/archive/v0.9.9.tar.gz"
+  sha256 "9ca565bfbd708bd9bc66db20ec2feb3cd2a3354cf8590ba99bf2871fb847413b"
+  head "https://github.com/coredns/coredns.git"
+
+  def default_coredns_config; <<~EOS
+    . {
+      hosts {
+        fallthrough
+      }
+      proxy . 8.8.8.8:53 8.8.4.4:53 {
+        protocol https_google
+      }
+      cache
+      errors
+    }
+    EOS
+  end
+
+  depends_on "go" => :build
+
+  go_resource "github.com/mholt/caddy" do
+    url "https://github.com/mholt/caddy.git",
+      :revision => "fc75527eb5ea9d0252bb3079a0137dbbfb754790"
+  end
+
+  go_resource "github.com/miekg/dns" do
+    url "https://github.com/miekg/dns.git",
+      :revision => "822ae18e7187e1bbde923a37081f6c1b8e9ba68a"
+  end
+
+  go_resource "golang.org/x/text" do
+    url "https://go.googlesource.com/text.git",
+      :revision => "c01e4764d870b77f8abe5096ee19ad20d80e8075"
+  end
+
+  go_resource "golang.org/x/net" do
+    url "https://go.googlesource.com/net.git",
+      :revision => "5561cd9b4330353950f399814f427425c0a26fd2"
+  end
+
+  def install
+    ENV["GOPATH"] = buildpath
+    ENV["GOOS"] = "darwin"
+    ENV["GOARCH"] = MacOS.prefer_64_bit? ? "amd64" : "386"
+
+    (buildpath/"src/github.com/coredns/coredns").install buildpath.children
+    Language::Go.stage_deps resources, buildpath/"src"
+
+    cd "src/github.com/coredns/coredns" do
+      system "go", "build", "-ldflags",
+        "-X github.com/coredns/coredns/coremain.gitTag=#{version}",
+        "-o", sbin/"coredns"
+    end
+
+    (buildpath/"Corefile.example").write default_coredns_config
+    etc.install "Corefile.example" => "coredns/Corefile"
+  end
+
+  def caveats; <<~EOS
+    To configure coredns, take the default configuration at
+    #{etc}/coredns/Corefile and edit to taste.
+
+    By default it is configured to proxy all dns requests
+    through Google's DNS-over-HTTPS:
+    (https://developers.google.com/speed/public-dns/docs/dns-over-https).
+    EOS
+  end
+
+  plist_options :startup => true
+
+  def plist; <<~EOS
+    <?xml version="1.0" encoding="UTF-8"?>
+    <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+    <plist version="1.0">
+    <dict>
+    <key>Label</key>
+    <string>#{plist_name}</string>
+    <key>ProgramArguments</key>
+    <array>
+    <string>#{opt_sbin}/coredns</string>
+    <string>-conf</string>
+    <string>#{etc}/coredns/Corefile</string>
+    </array>
+    <key>RunAtLoad</key>
+    <true/>
+    <key>KeepAlive</key>
+    <true/>
+    <key>StandardErrorPath</key>
+    <string>#{var}/log/coredns.log</string>
+    <key>StandardOutPath</key>
+    <string>#{var}/log/coredns.log</string>
+    <key>WorkingDirectory</key>
+    <string>#{HOMEBREW_PREFIX}</string>
+    </dict>
+    </plist>
+    EOS
+  end
+
+  test do
+    assert_match "CoreDNS-#{version}", shell_output("#{sbin}/coredns -version")
+  end
+end

README.md

@@ -1,2 +1,8 @@
 # deployment
 Scripts, utilities, and examples for deploying CoreDNS.
+
+
+## MacOS
+ To install:
+  - `brew tap "coredns/deployment" "https://github.com/coredns/deployment"`
+  - `brew install coredns`