ledger-mode 3.1.1 (new formula)

Closes #433.

Signed-off-by: Bob W. Hogg <rwhogg@linux.com>

Formula/ledger-mode.rb

@@ -0,0 +1,27 @@
+require File.expand_path("../../Homebrew/emacs_formula", __FILE__)
+
+class LedgerMode < EmacsFormula
+  desc "Emacs major mode for Ledger, the command-line accounting system"
+  homepage "https://github.com/ledger/ledger-mode"
+  url "https://github.com/ledger/ledger-mode/archive/v3.1.1.tar.gz"
+  sha256 "cb1087bf89beb3e38d51c621604c67ec2995fada6e819904ef5276231140cf74"
+  head "https://github.com/ledger/ledger-mode.git"
+
+  depends_on :emacs
+  depends_on "cmake" => :build
+
+  def install
+    system "cmake", ".", *std_cmake_args
+    system "make"
+    elisp.install Dir["*.el"], Dir["*.elc"]
+  end
+
+  test do
+    (testpath/"test.el").write <<-EOS.undent
+      (add-to-list 'load-path "#{elisp}")
+      (load "ledger-mode")
+      (print (minibuffer-prompt-width))
+    EOS
+    assert_equal "0", shell_output("emacs -Q --batch -l #{testpath}/test.el").strip
+  end
+end