class Bash < Formula
  desc "Bourne-Again SHell, a UNIX command interpreter"
  homepage "https://www.gnu.org/software/bash/"
  head "https://git.savannah.gnu.org/git/bash.git"

  stable do
    url "https://ftp.gnu.org/gnu/bash/bash-5.0.tar.gz"
    mirror "https://mirrors.ocf.berkeley.edu/gnu/bash/bash-5.0.tar.gz"
    mirror "https://mirrors.kernel.org/gnu/bash/bash-5.0.tar.gz"
    mirror "https://ftpmirror.gnu.org/bash/bash-5.0.tar.gz"
    mirror "https://gnu.cu.be/bash/bash-5.0.tar.gz"
    mirror "https://mirror.unicorncloud.org/gnu/bash/bash-5.0.tar.gz"
    sha256 "b4a80f2ac66170b2913efbfb9f2594f1f76c7b1afd11f799e22035d63077fb4d"
    version "5.0.2"

    %w[
      001 f2fe9e1f0faddf14ab9bfa88d450a75e5d028fedafad23b88716bd657c737289
      002 87e87d3542e598799adb3e7e01c8165bc743e136a400ed0de015845f7ff68707
    ].each_slice(2) do |p, checksum|
      patch :p0 do
        url "https://ftp.gnu.org/gnu/bash/bash-5.0-patches/bash50-#{p}"
        mirror "https://mirrors.ocf.berkeley.edu/gnu/bash/bash-5.0-patches/bash50-#{p}"
        mirror "https://mirrors.kernel.org/gnu/bash/bash-5.0-patches/bash50-#{p}"
        mirror "https://ftpmirror.gnu.org/bash/bash-5.0-patches/bash50-#{p}"
        mirror "https://gnu.cu.be/bash/bash-5.0-patches/bash50-#{p}"
        mirror "https://mirror.unicorncloud.org/gnu/bash/bash-5.0-patches/bash50-#{p}"
        sha256 checksum
      end
    end
  end

  bottle do
    sha256 "72c08f9abb1556ba97617d108717dfced16fd03a13a1b959a0cc4f7601e3b5fc" => :mojave
    sha256 "8aaba75411debe66a23dc6b4dec8f49711bc39354b674b7605d6c5c963bb7aee" => :high_sierra
    sha256 "1db2a380877c4e8a4daf7bfcdef5a9b6b8980b02f9c72f39a98365cb8b446ccc" => :sierra
  end

  def install
    # When built with SSH_SOURCE_BASHRC, bash will source ~/.bashrc when
    # it's non-interactively from sshd.  This allows the user to set
    # environment variables prior to running the command (e.g. PATH).  The
    # /bin/bash that ships with macOS defines this, and without it, some
    # things (e.g. git+ssh) will break if the user sets their default shell to
    # Homebrew's bash instead of /bin/bash.
    ENV.append_to_cflags "-DSSH_SOURCE_BASHRC"

    system "./configure", "--prefix=#{prefix}"
    system "make", "install"
  end

  def caveats; <<~EOS
    In order to use this build of bash as your login shell,
    it must be added to /etc/shells.
  EOS
  end

  test do
    assert_equal "hello", shell_output("#{bin}/bash -c \"echo -n hello\"")
  end
end