From bf680dfe6a1970242f39cf1df966e7e7004af1e2 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Wed, 2 Dec 2015 13:30:21 +0200
Subject: [PATCH] diffoscope 42 (new formula).

diffoscope will try to get to the bottom of what makes files or
directories different. It will recursively unpack archives of many
kinds and transform various binary formats into more human readable
form to compare them. It can compare two tarballs, ISO images, or PDF
just as easily.

Closes Homebrew/homebrew#46570.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
---
 Formula/diffoscope.rb | 49 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Formula/diffoscope.rb

diff --git a/Formula/diffoscope.rb b/Formula/diffoscope.rb
new file mode 100644
index 0000000000..876cc2d625
--- /dev/null
+++ b/Formula/diffoscope.rb
@@ -0,0 +1,49 @@
+class Diffoscope < Formula
+  desc "In-depth comparison of files, archives, and directories."
+  homepage "https://diffoscope.org"
+  url "https://pypi.python.org/packages/source/d/diffoscope/diffoscope-42.tar.gz"
+  sha256 "c0241acf5de7eb0e9e209e43dbf389beca722ddfb8b5d5630fd40569f1f465e2"
+
+  depends_on "libmagic"
+  depends_on "libarchive"
+  depends_on "gnu-tar"
+  depends_on :python3
+
+  resource "libarchive-c" do
+    url "https://pypi.python.org/packages/source/l/libarchive-c/libarchive-c-2.2.tar.gz"
+    sha256 "5d54aa6f6ab21e3bd12c2f8b6c4e80316b049c2b60ab0a4418cb34d8c63e997c"
+  end
+
+  resource "python-magic" do
+    url "https://pypi.python.org/packages/source/p/python-magic/python-magic-0.4.10.tar.gz"
+    sha256 "79fd2865ec96074749825f9e9562953995d5bf12b6793f24d75c37479ad4a2c3"
+  end
+
+  def install
+    # Submitted upstream to lunar@debian.org
+    inreplace "diffoscope/difference.py", "'diff', '-au7'", "'diff', '-aU7'"
+    inreplace "diffoscope/comparators/tar.py", "'tar'", "'gtar'"
+
+    pyver = Language::Python.major_minor_version "python3"
+    ENV.prepend_create_path "PYTHONPATH", libexec/"vendor/lib/python#{pyver}/site-packages"
+
+    resources.each do |r|
+      r.stage do
+        system "python3", *Language::Python.setup_install_args(libexec/"vendor")
+      end
+    end
+
+    ENV.prepend_create_path "PYTHONPATH", libexec/"lib/python#{pyver}/site-packages"
+    system "python3", *Language::Python.setup_install_args(libexec)
+    bin.install Dir[libexec/"bin/*"]
+    libarchive = Formula["libarchive"].opt_lib/"libarchive.dylib"
+    bin.env_script_all_files(libexec+"bin", :PYTHONPATH => ENV["PYTHONPATH"],
+                                            :LIBARCHIVE => libarchive)
+  end
+
+  test do
+    (testpath/"test1").write "test"
+    cp testpath/"test1", testpath/"test2"
+    system "#{bin}/diffoscope", "test1", "test2"
+  end
+end