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path: root/Library/Formula/auctex.rb
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class Auctex < Formula
  homepage "https://www.gnu.org/software/auctex/"
  url "http://ftpmirror.gnu.org/auctex/auctex-11.88.tar.gz"
  mirror "https://ftp.gnu.org/gnu/auctex/auctex-11.88.tar.gz"
  sha1 "098a9751c4e00812e61d62a0184a07d9753904df"

  head do
    url "git://git.savannah.gnu.org/auctex.git"
    depends_on "autoconf" => :build
  end

  depends_on :tex

  option "with-emacs=", "Path to an emacs binary"

  def which_emacs
    emacs = ARGV.value("with-emacs") || which("emacs").to_s
    fail "#{emacs} not found" unless File.exist? emacs
    emacs
  end

  def install
    # configure fails if the texmf dir is not there yet
    brew_texmf = share/"texmf"
    brew_texmf.mkpath

    system "./autogen.sh" if build.head?

    system "./configure", "--prefix=#{prefix}",
                          "--with-texmf-dir=#{brew_texmf}",
                          "--with-emacs=#{which_emacs}",
                          "--with-lispdir=#{share}/emacs/site-lisp"

    system "make"
    ENV.deparallelize # Needs a serialized install
    system "make", "install"
  end

  def caveats
    # check if the used emacs is in HOMEBREW_PREFIX/bin
    # for which case HOMEBREW_PREFIX/share/emacs/site-lisp should already
    # be by default in the load-path
    if which_emacs.index("#{HOMEBREW_PREFIX}/bin")
      dot_emacs = <<-EOS
      (require 'tex-site)
      EOS
    else
      dot_emacs = <<-EOS
      (add-to-list 'load-path "#{HOMEBREW_PREFIX}/share/emacs/site-lisp")
      (require 'tex-site)
      EOS
    end

    <<-EOS.undent
    texmf files installed into:
      #{HOMEBREW_PREFIX}/share/texmf/

    You can add it to your TEXMFHOME using:
      sudo tlmgr conf texmf TEXMFHOME "~/Library/texmf:#{HOMEBREW_PREFIX}/share/texmf"

    Emacs package installed into:
      #{HOMEBREW_PREFIX}/share/emacs/site-lisp

    To activate, add the following to your .emacs:
#{dot_emacs}
    EOS
  end
end