[WIP] Setup experimental Rust codegen

.gitignore

@@ -108,4 +108,8 @@ notes.txt
 failing-examples
 
 sdk.ts
-*_test.ts
+*_test.ts
+
+target
+
+.DS_Store

__tests__/starwars.schema.graphql

@@ -1,3 +1,11 @@
+scalar ID
+scalar String
+scalar Int
+scalar Float
+scalar Boolean
+
+scalar DateTime
+
 schema {
   query: Query
   mutation: Mutation

bin/tql

@@ -0,0 +1,29 @@
+#!/usr/bin/env node --experimental-wasi-unstable-preview1
+
+const fs = require("fs");
+const { WASI } = require("wasi");
+const path = require('path')
+
+const BINARY_PATH = './bin/tql.wasm'
+const WASM_BINARY = fs.readFileSync(BINARY_PATH)
+
+const [_node, _bin, ...rest] = process.argv
+
+const schemaPath = rest[0]
+const schemaDir = schemaPath && path.dirname(schemaPath)
+
+const wasi = new WASI({
+  // first arg provided to wasi must still be the executable path
+  args: [_bin, ...rest],
+  preopens: schemaDir && {
+    // preopens must be directories not files
+    [schemaDir]: schemaDir
+  }
+});
+
+const importObject = { wasi_snapshot_preview1: wasi.wasiImport };
+
+WebAssembly
+  .compile(WASM_BINARY)
+  .then(wasm => WebAssembly.instantiate(wasm, importObject))
+  .then(instance => wasi.start(instance));