karn 0.0.2 (new formula)

Closes Homebrew/homebrew#39517.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/karn.rb

@@ -0,0 +1,47 @@
+require "language/go"
+
+class Karn < Formula
+  homepage "https://github.com/prydonius/karn"
+  url "https://github.com/prydonius/karn/archive/v0.0.2.tar.gz"
+  sha256 "eac77b82f7abd9c37e70d01240e8e69893b7497d3dd5ab7b0fb2df04ae1e6529"
+
+  depends_on "go" => :build
+
+  go_resource "github.com/codegangsta/cli" do
+    url "https://github.com/codegangsta/cli.git",
+        :revision => "a889873af50a499d060097216dcdbcc26ed09e7c"
+  end
+
+  go_resource "github.com/mitchellh/go-homedir" do
+    url "https://github.com/mitchellh/go-homedir.git",
+        :revision => "1f6da4a72e57d4e7edd4a7295a585e0a3999a2d4"
+  end
+
+  go_resource "gopkg.in/yaml.v2" do
+    url "https://gopkg.in/yaml.v2",
+        :revision => "49c95bdc21843256fb6c4e0d370a05f24a0bf213", :using => :git
+  end
+
+  def install
+    ENV["GOPATH"] = buildpath
+    mkdir_p buildpath/"src/github.com/prydonius"
+    ln_s buildpath, buildpath/"src/github.com/prydonius/karn"
+    Language::Go.stage_deps resources, buildpath/"src"
+
+    system "go", "build", "cmd/karn/karn.go"
+    bin.install "karn"
+  end
+
+  test do
+    (testpath/".karn.yml").write <<-EOS.undent
+      ---
+      #{testpath}:
+        name: Homebrew Test
+        email: test@brew.sh
+    EOS
+    system "git", "init"
+    system "git", "config", "--global", "user.name", "Test"
+    system "git", "config", "--global", "user.email", "test@test.com"
+    system "#{bin}/karn", "update"
+  end
+end