Use execFile instead of exec to fix Windows path issue (#59)

Author: cknitt

src/NewProject.res

@@ -81,7 +81,7 @@ let createNewProject = async () => {
   await updateRescriptJson(~projectName, ~versions)
 
   await RescriptVersions.installVersions(versions)
-  let _ = await Promisified.ChildProcess.exec("git init")
+  let _ = await Promisified.ChildProcess.execFile("git", ["init"])
 
   s->P.Spinner.stop("Project created.")
 }

src/RescriptVersions.res

@@ -66,9 +66,8 @@ let promptVersions = async () => {
 let installVersions = async ({rescriptVersion, rescriptCoreVersion}) => {
   let packageManager = PackageManagers.getActivePackageManager()
   let packages = [`rescript@${rescriptVersion}`, `@rescript/core@${rescriptCoreVersion}`]
-  let command = `${packageManager} add ${packages->Array.join(" ")}`
 
-  let _ = await Node.Promisified.ChildProcess.exec(command)
+  let _ = await Node.Promisified.ChildProcess.execFile(packageManager, ["add", ...packages])
 }
 
 let esmModuleSystemName = ({rescriptVersion}) =>

src/bindings/Node.res

@@ -85,6 +85,6 @@ module Promisified = {
     type execResult = {stdout: string, stderr: string}
 
     @module("./NodePromisified.mjs")
-    external exec: string => promise<execResult> = "exec"
+    external execFile: (string, array<string>) => promise<execResult> = "execFile"
   }
 }

src/bindings/NodePromisified.mjs

@@ -1,4 +1,4 @@
-import { exec as execCallback } from "child_process";
+import { execFile as execFileCallback } from "child_process";
 import { promisify } from "util";
 
-export const exec = promisify(execCallback);
+export const execFile = promisify(execFileCallback);