Add Homebrew formula for Cpw, a file watcher that copies changed files to a destination

Author: mxvsh

Formula/cpw.rb

@@ -0,0 +1,31 @@
+class Cpw < Formula
+  desc "File watcher that copies changed files to a destination"
+  homepage "https://github.com/mxvsh/cpw"
+  version "VERSION_PLACEHOLDER"
+
+  on_macos do
+    if Hardware::CPU.arm?
+      url "https://github.com/mxvsh/cpw/releases/download/vVERSION_PLACEHOLDER/cpw-darwin-arm64"
+      sha256 "SHA256_PLACEHOLDER_DARWIN_ARM64"
+    end
+  end
+  
+  on_linux do
+    if Hardware::CPU.arm? && Hardware::CPU.is_64_bit?
+      url "https://github.com/mxvsh/cpw/releases/download/vVERSION_PLACEHOLDER/cpw-linux-arm64"
+      sha256 "SHA256_PLACEHOLDER_LINUX_ARM64"
+    end
+    if Hardware::CPU.arm? && !Hardware::CPU.is_64_bit?
+      url "https://github.com/mxvsh/cpw/releases/download/vVERSION_PLACEHOLDER/cpw-linux-armv7"
+      sha256 "SHA256_PLACEHOLDER_LINUX_ARM"
+    end
+  end
+
+  def install
+    bin.install Dir["cpw-*"].first => "cpw"
+  end
+
+  test do
+    system "#{bin}/cpw", "-version"
+  end
+end