readline.rb

class Readline < Formula
  desc "Library for command-line editing"
  homepage "https://tiswww.case.edu/php/chet/readline/rltop.html"
  url "https://ftp.gnu.org/gnu/readline/readline-8.2.tar.gz"
  mirror "https://ftpmirror.gnu.org/readline/readline-8.2.tar.gz"
  version "8.2.10"
  sha256 "3feb7171f16a84ee82ca18a36d7b9be109a52c04f492a053331d7d1095007c35"
  license "GPL-3.0-or-later"

  %w[
    001 bbf97f1ec40a929edab5aa81998c1e2ef435436c597754916e6a5868f273aff7
    002 e06503822c62f7bc0d9f387d4c78c09e0ce56e53872011363c74786c7cd4c053
    003 24f587ba46b46ed2b1868ccaf9947504feba154bb8faabd4adaea63ef7e6acb0
    004 79572eeaeb82afdc6869d7ad4cba9d4f519b1218070e17fa90bbecd49bd525ac
    005 622ba387dae5c185afb4b9b20634804e5f6c1c6e5e87ebee7c35a8f065114c99
    006 c7b45ff8c0d24d81482e6e0677e81563d13c74241f7b86c4de00d239bc81f5a1
    007 5911a5b980d7900aabdbee483f86dab7056851e6400efb002776a0a4a1bab6f6
    008 a177edc9d8c9f82e8c19d0630ab351f3fd1b201d655a1ddb5d51c4cee197b26a
    009 3d9885e692e1998523fd5c61f558cecd2aafd67a07bd3bfe1d7ad5a31777a116
    010 758e2ec65a0c214cfe6161f5cde3c5af4377c67d820ea01d13de3ca165f67b4c
  ].each_slice(2) do |p, checksum|
    patch :p0 do
      url "https://ftp.gnu.org/gnu/readline/readline-8.2-patches/readline82-#{p}"
      mirror "https://ftpmirror.gnu.org/readline/readline-8.2-patches/readline82-#{p}"
      sha256 checksum
    end
  end

  # We're not using `url :stable` here because we need `url` to be a string
  # when we use it in the `strategy` block.
  livecheck do
    url :stable
    regex(/href=.*?readline[._-]v?(\d+(?:\.\d+)+)\.t/i)
    strategy :gnu do |page, regex|
      # Match versions from files
      versions = page.scan(regex)
                     .flatten
                     .uniq
                     .map { |v| Version.new(v) }
                     .sort
      next versions if versions.blank?

      # Assume the last-sorted version is newest
      newest_version = versions.last

      # Simply return the found versions if there isn't a patches directory
      # for the "newest" version
      patches_directory = page.match(%r{href=.*?(readline[._-]v?#{newest_version.major_minor}[._-]patches/?)["' >]}i)
      next versions if patches_directory.blank?

      # Fetch the page for the patches directory
      patches_page = Homebrew::Livecheck::Strategy.page_content(
        "https://ftp.gnu.org/gnu/readline/#{patches_directory[1]}",
      )
      next versions if patches_page[:content].blank?

      # Generate additional major.minor.patch versions from the patch files in
      # the directory and add those to the versions array
      patches_page[:content].scan(/href=.*?readline[._-]?v?\d+(?:\.\d+)*[._-]0*(\d+)["' >]/i).each do |match|
        versions << "#{newest_version.major_minor}.#{match[0]}"
      end

      versions
    end
  end

  bottle do
    sha256 cellar: :any,                 arm64_sonoma:   "713fd1fa8544426b7e97eb21d13153195fea4c407db8a174bd183777b81c9192"
    sha256 cellar: :any,                 arm64_ventura:  "90351660d5ceca72a4c0a287555f2045db95f78aa5f65011b94213429f729cde"
    sha256 cellar: :any,                 arm64_monterey: "e58bc8376c36602c3cedf94075bb1097b04b77438c5a946fdbd37bf0eb6579c2"
    sha256 cellar: :any,                 sonoma:         "9796e0ff1cc29ae7e75d8fc1a3e2c5e8ae2aeade8d9d59a16363306bf6c5b8f4"
    sha256 cellar: :any,                 ventura:        "952e2975dffc98bd35673c86474dbb91fadc8d993c0720e4f085597f7a484af9"
    sha256 cellar: :any,                 monterey:       "3633320dce51662036ea90acfc9adf5bb5e6f1dca7dbdb539839736129c474b0"
    sha256 cellar: :any_skip_relocation, x86_64_linux:   "65181d2c0a9bd1d91ded6f7ec4a69b1110f65e875b332947e86a30aed7eab20f"
  end

  keg_only :shadowed_by_macos, "macOS provides BSD libedit"

  uses_from_macos "ncurses"

  def install
    system "./configure", "--prefix=#{prefix}", "--with-curses"
    # FIXME: Setting `SHLIB_LIBS` should not be needed, but, on Linux,
    #        many dependents expect readline to link with ncurses and
    #        are broken without it. Readline should be agnostic about
    #        the terminfo library on Linux.
    system "make", "install", "SHLIB_LIBS=-lcurses"
  end

  test do
    (testpath/"test.c").write <<~EOS
      #include <stdio.h>
      #include <stdlib.h>
      #include <readline/readline.h>

      int main()
      {
        printf("%s\\n", readline("test> "));
        return 0;
      }
    EOS

    system ENV.cc, "-L", lib, "test.c", "-L#{lib}", "-lreadline", "-o", "test"
    assert_equal "test> Hello, World!\nHello, World!", pipe_output("./test", "Hello, World!\n").strip
  end
end