New formula: eSpeak

Closes Homebrew/homebrew#31292.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/espeak.rb

@@ -0,0 +1,22 @@
+require "formula"
+
+class Espeak < Formula
+  homepage "http://espeak.sourceforge.net/"
+  url "https://downloads.sourceforge.net/project/espeak/espeak/espeak-1.48/espeak-1.48.04-source.zip"
+  sha1 "b22c0361885d05e61d98ecedca0a4926ea2fb2ad"
+
+  depends_on "portaudio"
+
+  def install
+    share.install "espeak-data"
+    cd "src" do
+      rm "portaudio.h"
+      system "make", "speak", "DATADIR=#{share}/espeak-data", "PREFIX=#{prefix}"
+      bin.install "speak" => "espeak"
+    end
+  end
+
+  test do
+    system "#{bin}/espeak", "This is a test for Espeak.", "-w", "out.wav"
+  end
+end