class GuileConfig < Formula
  desc "Module for handling application configuration in a declarative way"
  homepage "https://gitlab.com/a-sassmannshausen/guile-config/"
  url "https://gitlab.com/api/v4/projects/7016362/repository/archive?sha=8a4f6442ac42084b00713dde3181c3538d52edbf"
  sha256 "6e5099475e23dcab4253f8c59b113c1cf0cb250fb9709582af7a5b2902999698"
  version "main"
  
  depends_on "autoconf" => :build
  depends_on "automake" => :build
  depends_on "pkg-config" => :build
  depends_on "texinfo" => :build
  depends_on "msg/apps/guile-next"

  def install
    ENV["GUILE_AUTO_COMPILE"] = "0"
    # We need this so we can find other modules.
    ENV["GUILE_LOAD_PATH"] = HOMEBREW_PREFIX/"share/guile/site/3.0"
    ENV["GUILE_LOAD_COMPILED_PATH"] = HOMEBREW_PREFIX/"lib/guile/3.0/site-ccache"
    ENV["GUILE_SYSTEM_EXTENSIONS_PATH"] = HOMEBREW_PREFIX/"lib/guile/3.0/extensions"
    
    system "autoreconf", "-vif"
    system "./configure", "--prefix=#{prefix}"
    system "make", "install"
  end

  def caveats
    <<~EOS
      Remember to add the following to your .bashrc or equivalent in order to use this module:
        export GUILE_LOAD_PATH="#{HOMEBREW_PREFIX}/share/guile/site/3.0"
        export GUILE_LOAD_COMPILED_PATH="#{HOMEBREW_PREFIX}/lib/guile/3.0/site-ccache"
        export GUILE_SYSTEM_EXTENSIONS_PATH="#{HOMEBREW_PREFIX}/lib/guile/3.0/extensions"
    EOS
  end

  test do
    config = testpath/"config.scm"
    config.write <<~EOS
      (use-modules (config))
    EOS

    ENV["GUILE_AUTO_COMPILE"] = "0"
    ENV["GUILE_LOAD_PATH"] = HOMEBREW_PREFIX/"share/guile/site/3.0"
    ENV["GUILE_LOAD_COMPILED_PATH"] = HOMEBREW_PREFIX/"lib/guile/3.0/site-ccache"
    ENV["GUILE_SYSTEM_EXTENSIONS_PATH"] = HOMEBREW_PREFIX/"lib/guile/3.0/extensions"

    system "guile", config
  end
end