Updated wasm package to include wasm-wasi-component.

This also requires a small patch to unit source code to fix FTBFS on an
older macOS version still used in github actions CI.

Formula/unit-wasm.rb

@@ -5,10 +5,15 @@ class UnitWasm < Formula
   sha256 "4b5e9be3f3990fceabf06292c2b7853667aceb71fd8de5dc67cb7fb05d247a20"
   head "https://github.com/nginx/unit.git", branch: "master"
 
+  depends_on "rust" => :build
   depends_on "openssl"
   depends_on "[email protected]"
   depends_on "wasmtime"
 
+  # uname -o does not seem to exist on macOS 12.7 currently used in github actions
+  # which leads to FTBFS on that target
+  patch :DATA
+
   def install
     system "./configure",
               "--prefix=#{prefix}",
@@ -33,5 +38,23 @@ def install
       "--include-path=#{HOMEBREW_PREFIX}/usr/include/",
       "--lib-path=#{HOMEBREW_PREFIX}/lib/"
     system "make", "wasm-install"
+
+    system "./configure", "wasm-wasi-component"
+    system "make", "wasm-wasi-component-install"
   end
 end
+
+__END__
+diff --git a/auto/modules/wasm-wasi-component b/auto/modules/wasm-wasi-component
+index bfb6ffcb..6c8258d7 100644
+--- a/auto/modules/wasm-wasi-component
++++ b/auto/modules/wasm-wasi-component
+@@ -82,7 +82,7 @@ fi
+ $echo " + $NXT_WCM_MODULE module: $NXT_WCM_MOD_NAME"
+
+
+-NXT_OS=$(uname -o)
++NXT_OS=$(uname -s)
+
+ if [ $NXT_OS = "Darwin" ]; then
+ 	NXT_CARGO_CMD="cargo rustc --release --manifest-path src/wasm-wasi-component/Cargo.toml -- --emit link=target/release/libwasm_wasi_component.so -C link-args='-undefined dynamic_lookup'"