pandoc-crossref 0.2.0.1 (new formula)

Closes Homebrew/legacy-homebrew#50517.

Signed-off-by: Tim D. Smith <git@tim-smith.us>

Formula/pandoc-crossref.rb

@@ -0,0 +1,32 @@
+class PandocCrossref < Formula
+  include Language::Haskell::Cabal
+
+  desc "Pandoc filter for numbering and cross-referencing."
+  homepage "https://github.com/lierdakil/pandoc-crossref"
+  url "https://hackage.haskell.org/package/pandoc-crossref-0.2.0.1/pandoc-crossref-0.2.0.1.tar.gz"
+  sha256 "44bdbc38d8d7a743951a2333fb70b33a6497b2d50ccdb5696736fdc5133aef21"
+
+  depends_on "ghc" => :build
+  depends_on "cabal-install" => :build
+  depends_on "pandoc"
+
+  def install
+    args = []
+    args << "--constraint=cryptonite -support_aesni" if MacOS.version <= :lion
+    install_cabal_package *args
+  end
+
+  test do
+    md = testpath/"test.md"
+    md.write <<-EOS.undent
+      Demo for pandoc-crossref.
+      See equation @eq:eqn1 for cross-referencing.
+      Display equations are labelled and numbered
+
+      $$ P_i(x) = \sum_i a_i x^i $$ {#eq:eqn1}
+
+
+    EOS
+    system "pandoc", "-F", "pandoc-crossref", md
+  end
+end