mruby-cli 0.0.4 (new formula)

Closes #14797.

Signed-off-by: Alex Dunn <dunn.alex@gmail.com>

Formula/mruby-cli.rb

@@ -0,0 +1,29 @@
+class MrubyCli < Formula
+  desc "Build native command-line applications for Linux, MacOS, and Windows"
+  homepage "https://github.com/hone/mruby-cli"
+  url "https://github.com/hone/mruby-cli/archive/v0.0.4.tar.gz"
+  sha256 "97d889b5980193c562e82b42089b937e675b73950fa0d0c4e46fbe71d16d719f"
+
+  def install
+    ENV["MRUBY_CLI_LOCAL"] = "true"
+
+    # Edit config to skip building Linux and Windows binaries
+    rm buildpath/"build_config.rb"
+
+    (buildpath/"build_config.rb").write <<-EOS.undent
+      MRuby::Build.new do |conf|
+        toolchain :clang
+        conf.gem File.expand_path(File.dirname(__FILE__))
+      end
+    EOS
+
+    system "rake", "compile"
+    bin.install "mruby/build/host/bin/mruby-cli"
+  end
+
+  test do
+    system "#{bin}/mruby-cli", "--setup=brew"
+    assert File.file? "brew/mrblib/brew.rb"
+    assert File.file? "brew/tools/brew/brew.c"
+  end
+end