class Fakeroot < Formula
  desc "Provide a fake root environment"
  homepage "https://tracker.debian.org/pkg/fakeroot"
  url "https://mirrors.kernel.org/debian/pool/main/f/fakeroot/fakeroot_1.20.2.orig.tar.bz2"
  mirror "http://ftp.debian.org/debian/pool/main/f/fakeroot/fakeroot_1.20.2.orig.tar.bz2"
  sha1 "367040df07043edb630942b21939e493f3fad888"

  bottle do
    cellar :any
    revision 1
    sha1 "33ae18f3adadf47b0266d5e8ef7d2ec6d87f49a4" => :yosemite
    sha1 "96ab6f2489b44639d575f61604401eba046ff08c" => :mavericks
    sha1 "3f4c8d4554f6311d38dcdccc7844e1a62e4de13b" => :mountain_lion
  end

  # Compile is broken. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=766649
  # Patches submitted upstream on 24/10/2014, but no reply from maintainer thus far.
  patch do
    url "https://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=0001-Implement-openat-2-wrapper-which-handles-optional-ar.patch;att=1;bug=766649"
    sha1 "9207619d6d8a55f25d50ba911bfa72f486911d81"
  end

  patch do
    url "https://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=0002-OS-X-10.10-introduced-id_t-int-in-gs-etpriority.patch;att=2;bug=766649"
    sha1 "a30907ffdcfe159c2ac6b3f829bd5b9a67188940"
  end

  # This patch handles mapping the variadic arguments to the system openat to
  # the fixed arguments for our next_openat function.
  # Patch has been submitted to
  # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=766649
  patch :DATA

  def install
    system "./configure", "--disable-dependency-tracking",
                          "--disable-static",
                          "--disable-silent-rules",
                          "--prefix=#{prefix}"

    # Yosemite introduces an openat function, which has variadic arguments,
    # which the "fancy" wrapping scheme used by fakeroot does not handle. So we
    # have to patch the generated file after it is generated.
    # Patch has been submitted with detailed explanation to
    # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=766649
    system "make", "wraptmpf.h"
    (buildpath/"patch-for-wraptmpf-h").write <<-EOS.undent
      diff --git a/wraptmpf.h b/wraptmpf.h
      index dbfccc9..0e04771 100644
      --- a/wraptmpf.h
      +++ b/wraptmpf.h
      @@ -575,6 +575,10 @@ static __inline__ int next_mkdirat (int dir_fd, const char *pathname, mode_t mod
       #endif /* HAVE_MKDIRAT */
       #ifdef HAVE_OPENAT
       extern int openat (int dir_fd, const char *pathname, int flags, ...);
      +static __inline__ int next_openat (int dir_fd, const char *pathname, int flags, mode_t mode) __attribute__((always_inline));
      +static __inline__ int next_openat (int dir_fd, const char *pathname, int flags, mode_t mode) {
      +  return openat (dir_fd, pathname, flags, mode);
      +}

       #endif /* HAVE_OPENAT */
       #ifdef HAVE_RENAMEAT
    EOS

    system "patch < patch-for-wraptmpf-h"

    system "make"
    system "make", "install"
  end

  test do
    assert_equal "root", shell_output("#{bin}/fakeroot whoami").strip
  end
end

__END__
index 15fdd1d..29d738d 100644
--- a/libfakeroot.c
+++ b/libfakeroot.c
@@ -2446,6 +2446,6 @@ int openat(int dir_fd, const char *pathname, int flags, ...)
         va_end(args);
         return next_openat(dir_fd, pathname, flags, mode);
     }
-    return next_openat(dir_fd, pathname, flags);
+    return next_openat(dir_fd, pathname, flags, NULL);
 }
 #endif