Install wasi-sdk in local

Author: kateinoigakukun

src/swift/.gitignore

@@ -3,3 +3,5 @@
 /Packages
 /*.xcodeproj
 xcuserdata/
+
+/.wasi-sdk

src/swift/Makefile

@@ -0,0 +1,12 @@
+MAKEFILE_DIR := $(dir $(lastword $(MAKEFILE_LIST)))
+WASI_SDK_DIR ?= $(MAKEFILE_DIR)/.wasi-sdk
+
+
+build: .wasi-sdk/dummy
+	swift build --triple wasm32-unknown-wasi \
+		-Xswiftc -Xclang-linker \
+		-Xswiftc --sysroot=$(WASI_SDK_DIR)/share/wasi-sysroot \
+		-Xlinker --allow-undefined
+.wasi-sdk/dummy:
+	./script/install-wasi-sdk.sh $(WASI_SDK_DIR)
+	touch .wasi-sdk/dummy

src/swift/script/install-wasi-sdk.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+set -x
+INSTALL_PATH=$1
+
+WASI_SDK_DOWNLOAD_URL="https://github.com/swiftwasm/wasi-sdk/releases/download/0.2.0-swiftwasm/dist-ubuntu-latest.tgz.zip"
+
+TMP_DIR=$(mktemp -d)
+pushd $TMP_DIR
+wget -O dist-wasi-sdk.tgz.zip $WASI_SDK_DOWNLOAD_URL
+unzip dist-wasi-sdk.tgz.zip -d .
+WASI_SDK_TAR_PATH=$(find . -type f -name "wasi-sdk-*")
+WASI_SDK_FULL_NAME=$(basename $WASI_SDK_TAR_PATH -linux.tar.gz)
+tar xfz $WASI_SDK_TAR_PATH
+popd
+
+mv $TMP_DIR/$WASI_SDK_FULL_NAME $INSTALL_PATH