Wasm-wc: Wire it up to the build system

Et voila...

  $ ./configure wasm-wasi-component
  configuring wasm-wasi-component module
  Looking for rust compiler ... found.
  Looking for cargo ... found.
   + wasm-wasi-component module: wasm_wasi_component.unit.so
  $ make install
  test -d /opt/unit/sbin          || install -d /opt/unit/sbin
  install -p build/sbin/unitd /opt/unit/sbin/
  test -d /opt/unit/state                 || install -d /opt/unit/state
  test -d /opt/unit               || install -d /opt/unit
  test -d /opt/unit               || install -d /opt/unit
  test -d /opt/unit/share/man/man8                || install -d /opt/unit/sh
man/man8
  install -p -m644 build/share/man/man8/unitd.8           /opt/unit/share/ma
n8/
  make build/src/nxt_unit.o
  make[1]: Entering directory '/home/andrew/src/unit'
  make[1]: 'build/src/nxt_unit.o' is up to date.
  make[1]: Leaving directory '/home/andrew/src/unit'
  cargo build --release --manifest-path src/wasm-wasi-component/Cargo.toml
      Finished release [optimized] target(s) in 0.55s
  install -d /opt/unit/modules
  install -p src/wasm-wasi-component/target/release/libwasm_wasi_component.so \
          /opt/unit/modules/wasm_wasi_component.unit.so

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

auto/help

@@ -79,4 +79,9 @@ cat << END
   wasm OPTIONS         configure WebAssembly module
                        run "./configure wasm --help" to see available options
 
+  wasm-wasi-component OPTIONS
+                       configure WebAssembly Component Model module
+                       run "./configure wasm-wasi-component --help" to see
+                       available options
+
 END

auto/modules/conf

@@ -37,6 +37,10 @@ case "$nxt_module" in
        . auto/modules/wasm
    ;;
 
+   wasm-wasi-component)
+       . auto/modules/wasm-wasi-component
+   ;;
+
    *)
        echo
        echo $0: error: invalid module \"$nxt_module\".

auto/modules/wasm-wasi-component

@@ -0,0 +1,119 @@
+# Copyright (C) Andrew Clayton
+# Copyright (C) F5, Inc.
+
+
+NXT_WCM_MODULE=wasm-wasi-component
+NXT_WCM_MOD_NAME=`echo $NXT_WCM_MODULE | tr '-' '_'`.unit.so
+
+
+shift
+
+for nxt_option; do
+
+    case "$nxt_option" in
+        -*=*) value=`echo "$nxt_option" | sed -e 's/[-_a-zA-Z0-9]*=//'`     ;;
+           *) value="" ;;
+    esac
+
+    case "$nxt_option" in
+
+        --help)
+            cat << END
+
+END
+            exit 0
+        ;;
+
+        *)
+            echo
+            echo $0: error: invalid $NXT_WCM_MODULE option \"$nxt_option\"
+            echo
+            exit 1
+        ;;
+    esac
+
+done
+
+
+if [ ! -f $NXT_AUTOCONF_DATA ]; then
+   echo
+   echo Please run common $0 before configuring module \"$nxt_module\".
+   echo
+   exit 1
+fi
+
+. $NXT_AUTOCONF_DATA
+
+NXT_WCM_WASM_TOOLS_BIN=${NXT_WCM_WASM_TOOLS_BIN=}
+
+
+$echo "configuring $NXT_WCM_MODULE module"
+$echo "configuring $NXT_WCM_MODULE module ..." >> $NXT_AUTOCONF_ERR
+
+$echo -n "looking for rust compiler ... "
+
+if [ -z `which rustc 2>/dev/null` ]; then
+    $echo "not found."
+    exit 1;
+fi
+
+$echo "found."
+
+$echo -n "looking for cargo ... "
+
+if [ -z `which cargo 2>/dev/null` ]; then
+    $echo "not found."
+    exit 1;
+fi
+
+$echo "found."
+
+
+if grep ^$NXT_WCM_MODULE: $NXT_MAKEFILE 2>&1 > /dev/null; then
+    $echo
+    $echo $0: error: duplicate \"$NXT_WCM_MODULE\" module configured.
+    $echo
+    exit 1;
+fi
+
+
+$echo " + $NXT_WCM_MODULE module: $NXT_WCM_MOD_NAME"
+
+
+NXT_OS=$(uname -o)
+
+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'"
+else
+	NXT_CARGO_CMD="cargo build --release --manifest-path src/wasm-wasi-component/Cargo.toml"
+fi
+
+
+cat << END >> $NXT_MAKEFILE
+
+.PHONY: ${NXT_WCM_MODULE}
+.PHONY: ${NXT_WCM_MODULE}-install
+.PHONY: ${NXT_WCM_MODULE}-uninstall
+
+all: ${NXT_WCM_MODULE}
+
+${NXT_WCM_MODULE}:  $NXT_BUILD_DIR/lib/unit/modules/$NXT_WCM_MOD_NAME
+
+$NXT_BUILD_DIR/lib/unit/modules/$NXT_WCM_MOD_NAME:
+	make build/src/nxt_unit.o
+	$NXT_CARGO_CMD
+
+install: ${NXT_WCM_MODULE}-install
+
+${NXT_WCM_MODULE}-install: ${NXT_WCM_MODULE} install-check
+	install -d \$(DESTDIR)$NXT_MODULESDIR
+	install -p src/wasm-wasi-component/target/release/libwasm_wasi_component.so \\
+		\$(DESTDIR)$NXT_MODULESDIR/$NXT_WCM_MOD_NAME
+
+uninstall: ${NXT_WCM_MODULE}-uninstall
+
+${NXT_WCM_MODULE}-uninstall:
+	rm -f \$(DESTDIR)$NXT_MODULESDIR/$NXT_WCM_MOD_NAME
+	@rmdir -p \$(DESTDIR)$NXT_MODULESDIR 2>/dev/null || true
+
+END