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/0.16.4.tar.gz"
  sha256 "294034747b0739d716d88670e830a97080fb73b8d6172b2ae695074316903e8a"
  head "https://github.com/junegunn/fzf.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "89f957bbe88f674b70254dcef6ddf414cf6937f2c458bd411178b719d3d84b49" => :sierra
    sha256 "bb277992fc803da8fd4ae7a8a68feb0cf62afe9f3572404eda70064b89804fab" => :el_capitan
    sha256 "4c1250d8317f565131957283ec23f0a5be4fc173b8ea9b9a19da75ffa6380873" => :yosemite
  end

  depends_on "go" => :build

  go_resource "github.com/junegunn/go-isatty" do
    url "https://github.com/junegunn/go-isatty.git",
        :revision => "66b8e73f3f5cda9f96b69efd03dd3d7fc4a5cdb8"
  end

  go_resource "github.com/junegunn/go-runewidth" do
    url "https://github.com/junegunn/go-runewidth.git",
        :revision => "14207d285c6c197daabb5c9793d63e7af9ab2d50"
  end

  go_resource "github.com/junegunn/go-shellwords" do
    url "https://github.com/junegunn/go-shellwords.git",
        :revision => "33bd8f1ebe16d6e5eb688cc885749a63059e9167"
  end

  go_resource "golang.org/x/crypto" do
    url "https://go.googlesource.com/crypto.git",
        :revision => "abc5fa7ad02123a41f02bf1391c9760f7586e608"
  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