class Cgit < Formula
  desc "Hyperfast web frontend for Git repositories written in C"
  homepage "https://git.zx2c4.com/cgit/"
  url "https://git.zx2c4.com/cgit/snapshot/cgit-1.2.3.tar.xz"
  sha256 "5a5f12d2f66bd3629c8bc103ec8ec2301b292e97155d30a9a61884ea414a6da4"
  license "GPL-2.0-only"
  revision 1

  livecheck do
    url "https://git.zx2c4.com/cgit/refs/tags"
    regex(/href=.*?cgit[._-]v?(\d+(?:\.\d+)+)\.t/i)
  end

  bottle do
    sha256 arm64_ventura:  "8435a3e97f7d97b0a81af4d65387edba8da214f8d348cac06a0200dfd861ca83"
    sha256 arm64_monterey: "3e517a8b04d86f340eeba6bdd52d3a187db3e604137b5d0cc3f5a0a5547d65b3"
    sha256 arm64_big_sur:  "27b3ceaddc63451dd3b57c153dc9f4810326884929e4839ef430d43d2b39d197"
    sha256 ventura:        "2f2b6641da929056912b8999d35801a707380714abc20dc56d5c38445f017066"
    sha256 monterey:       "3e955c47ed5c722d9124b1a2efc90b7ac46e5cc89c0bf8772b2dd9061bb54a56"
    sha256 big_sur:        "9e0084dfe5c75d91bf5b6494f6e15534cff838ac52a866e4c8667062dcdd2eb2"
    sha256 catalina:       "787b27262a5998a5dba017d0f75bfa3dadef68b7e3730d87719b1ab48536814d"
    sha256 x86_64_linux:   "472e74b2dec4db2de6714623b092f441e17d9806e5316c3597895329fde2abc3"
  end

  uses_from_macos "zlib"

  on_macos do
    depends_on "gettext"
  end

  on_linux do
    depends_on "openssl@3" => :build # Uses CommonCrypto on macOS
  end

  # git version is mandated by cgit: see GIT_VER variable in Makefile
  # https://git.zx2c4.com/cgit/tree/Makefile?h=v1.2#n17
  resource "git" do
    url "https://www.kernel.org/pub/software/scm/git/git-2.25.1.tar.gz"
    sha256 "4999ae0ee6cc7dfb280d7051e39a82a5630b00c1d8cd54890f07b4b7193d25aa"
  end

  # cgit 1.2.2+ needs memrchr, for which macOS provides no implementation
  # https://lists.zx2c4.com/pipermail/cgit/2020-August/004510.html
  patch do
    url "https://raw.githubusercontent.com/Homebrew/formula-patches/5decb544ec505d0868ef79f03707fafb0e85e47c/cgit/memrchr-impl.patch"
    sha256 "3ab5044db3001b411b58309d70f00b0dee54df991ebc66da9406711ed4007f0f"
  end

  def install
    resource("git").stage(buildpath/"git")
    system "make", "prefix=#{prefix}",
                   "CGIT_SCRIPT_PATH=#{pkgshare}",
                   "CGIT_DATA_PATH=#{var}/www/htdocs/cgit",
                   "CGIT_CONFIG=#{etc}/cgitrc",
                   "CACHE_ROOT=#{var}/cache/cgit",
                   "install"
  end

  test do
    (testpath/"cgitrc").write <<~EOS
      repo.url=test
      repo.path=#{testpath}
      repo.desc=the master foo repository
      repo.owner=fooman@example.com
    EOS

    ENV["CGIT_CONFIG"] = testpath/"cgitrc"
    # no "Status" line means 200
    refute_match(/Status: .+/, shell_output("#{pkgshare}/cgit.cgi"))
  end
end