require "language/go"

class Fzf < Formula
  desc "Command-line fuzzy finder written in Go"
  homepage "https://github.com/junegunn/fzf"
  url "https://github.com/junegunn/fzf/archive/0.13.4.tar.gz"
  sha256 "ba561de9393c7f5604f3463c0d48960b86690afe8396f2c9672d3c4777960c7c"
  head "https://github.com/junegunn/fzf.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "a8ef2f7a95a4f99825283b86ae6aecafa3665b21e42eb383dfb919a86a4f4458" => :el_capitan
    sha256 "74e925272f58a3302747da2cde972dfce9123f915649868ac2fdda05d554c1da" => :yosemite
    sha256 "e9cb6ae57255e5d97d0e242a55657d89e476906fbdfdbecd66ed5019057e7e3e" => :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", "man/man1/fzf-tmux.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