require "language/go"

class Fzf < Formula
  desc "Fuzzy finder for your shell"
  homepage "https://github.com/junegunn/fzf"
  url "https://github.com/junegunn/fzf/archive/0.10.9.tar.gz"
  sha256 "55a9b8d27f3832be569519bcd3afe1f1e345daaa8b8b6523aedff661954f42fb"
  head "https://github.com/junegunn/fzf.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "3f788e4e27755e6973b67bb28885654d5861e0a5cfae3120f6dc49bfe1f78abc" => :el_capitan
    sha256 "b518e6cece9536d2add097c09003f96d25cf2a70240fec60a6f0be8ed7d60077" => :yosemite
    sha256 "18f48d17cd9b6e746e6090d89119d443318d5a3ba4853007c4002cb6413b046c" => :mavericks
  end

  depends_on "go" => :build

  go_resource "github.com/junegunn/go-shellwords" do
    url "https://github.com/junegunn/go-shellwords.git",
      :revision => "35d512af75e283aae4ca1fc3d44b159ed66189a4"
  end

  go_resource "github.com/junegunn/go-runewidth" do
    url "https://github.com/junegunn/go-runewidth.git",
      :revision => "63c378b851290989b19ca955468386485f118c65"
  end

  def install
    ENV["GOPATH"] = buildpath
    mkdir_p buildpath/"src/github.com/junegunn"
    ln_s buildpath, buildpath/"src/github.com/junegunn/fzf"
    Language::Go.stage_deps resources, buildpath/"src"

    cd buildpath/"src/fzf" do
      system "go", "build"
      bin.install "fzf"
    end

    prefix.install %w[install uninstall LICENSE]
    (prefix/"shell").install %w[bash zsh fish].map { |s| "shell/key-bindings.#{s}" }
    (prefix/"shell").install %w[bash zsh].map { |s| "shell/completion.#{s}" }
    (prefix/"plugin").install "plugin/fzf.vim"
    man1.install "man/man1/fzf.1"
    bin.install "bin/fzf-tmux"
  end

  def caveats; <<-EOS.undent
    To install useful keybindings and fuzzy completion:
      #{opt_prefix}/install

    To use fzf in Vim, add the following line to your .vimrc:
      set rtp+=#{opt_prefix}
    EOS
  end

  test do
    (testpath/"list").write %w[hello world].join($/)
    assert_equal "world", shell_output("cat #{testpath}/list | #{bin}/fzf -f wld").chomp
  end
end