add a local build tool

build.js

@@ -0,0 +1,48 @@
+// This is a deno helper script to locally build the installer using Inno Setup
+// Yeah, I know  it's not Node, but we need to compile this and Node SEAs on Win32 are a PITA.
+const content = await Deno.readTextFile('./nvm.iss')
+const data = JSON.parse(await Deno.readTextFile('./src/manifest.json'))
+const {version} = data
+const output = content.replaceAll('{{VERSION}}', version)
+await Deno.writeTextFile('./.tmp.iss', output)
+
+console.log('Viewing /.tmp.iss')
+output.split("\n").forEach((line, num) => {
+  let n = `${num+1}`
+  while (n.length < 3) {
+    n = ' ' + n
+  }
+
+  console.log(`${n} | ${line}`)
+})
+
+const command = await new Deno.Command('.\\assets\\buildtools\\iscc.exe', {
+  args: ['.\\.tmp.iss'],
+  stdout: 'piped',
+  stderr: 'piped',
+})
+
+const process = command.spawn();
+
+// Stream stdout
+(async () => {
+  const decoder = new TextDecoder();
+  for await (const chunk of process.stdout) {
+    console.log(decoder.decode(chunk));
+  }
+})();
+
+// Stream stderr
+(async () => {
+  const decoder = new TextDecoder();
+  for await (const chunk of process.stderr) {
+    console.error(decoder.decode(chunk));
+  }
+})();
+
+// Wait for completion
+const status = await process.status;
+Deno.remove('.\\.tmp.iss');
+if (!status.success) {
+  Deno.exit(status.code);
+}