Added formula for lgtm

lgtm.rb

@@ -0,0 +1,50 @@
+require "formula"
+
+class Lgtm < Formula
+  homepage "https://github.com/go-gitea/lgtm"
+  head "https://github.com/go-gitea/lgtm.git"
+
+  stable do
+    url "http://dl.gitea.io/lgtm/1.0.0/lgtm-1.0.0-darwin-amd64"
+    sha256 `curl -s http://dl.gitea.io/lgtm/1.0.0/lgtm-1.0.0-darwin-amd64.sha256`.split(" ").first
+    version "1.0.0"
+  end
+
+  devel do
+    url "http://dl.gitea.io/lgtm/master/lgtm-master-darwin-amd64"
+    sha256 `curl -s http://dl.gitea.io/lgtm/master/lgtm-master-darwin-amd64.sha256`.split(" ").first
+    version "master"
+  end
+
+  head do
+    url "https://github.com/go-gitea/lgtm.git", :branch => "master"
+
+    depends_on "go" => :build
+    depends_on "mercurial" => :build
+    depends_on "bzr" => :build
+    depends_on "git" => :build
+  end
+
+  test do
+    system "#{bin}/lgtm", "--version"
+  end
+
+  def install
+    if build.head?
+      mkdir_p buildpath/File.join("src", "github.com", "go-gitea")
+      ln_s buildpath, buildpath/File.join("src", "github.com", "go-gitea", "lgtm")
+
+      ENV.append_path "PATH", File.join(buildpath, "bin")
+
+      ENV["GOPATH"] = buildpath
+      ENV["GOHOME"] = buildpath
+      ENV["TAGS"] = ""
+
+      system("make", "build")
+
+      bin.install "#{buildpath}/bin/lgtm" => "lgtm"
+    else
+      bin.install "#{buildpath}/lgtm-master-darwin-amd64" => "lgtm"
+    end
+  end
+end