Support Windows development (#195)

* Port build and test scripts to Windows

* Port generate script to JS

* Use TypeScript for generate script

* Require glob after NPM install

* Alter generate to work before first install

* Remove unnecessary types

* Reinstall NPM packages using .nvmrc Node version

bin/protoc-gen-ts.cmd

@@ -0,0 +1,7 @@
+@IF EXIST "%~dp0\node.exe" (
+  "%~dp0\node.exe"  "%~dp0\..\lib\index.js" %*
+) ELSE (
+  @SETLOCAL
+  @SET PATHEXT=%PATHEXT:;.JS;=;%
+  node  "%~dp0\..\lib\index.js" %*
+)

generate.js

@@ -0,0 +1,101 @@
+const { spawnSync } = require("child_process");
+
+const { existsSync, mkdirSync } = require("fs");
+const { resolve } = require("path");
+
+const protocVersion = "3.5.1";
+
+const examplesGeneratedPath = resolve(__dirname, "examples", "generated");
+
+const binSuffix = process.platform === "win32" ? ".cmd" : "";
+const nodeModulesBin = resolve(__dirname, "node_modules", ".bin");
+
+const downloadPath = resolve(nodeModulesBin, "download") + binSuffix;
+
+const protocRoot = resolve(__dirname, "protoc");
+const protocPath = resolve(protocRoot, "bin", "protoc");
+
+const protocPluginPath = resolve(__dirname, "bin", "protoc-gen-ts") + binSuffix;
+
+const rimrafPath = resolve(nodeModulesBin, "rimraf") + binSuffix;
+
+const supportedPlatforms = {
+  darwin: {
+    downloadSuffix: "osx-x86_64",
+    name: "Mac"
+  },
+  linux: {
+    downloadSuffix: "linux-x86_64",
+    name: "Linux"
+  },
+  win32: {
+    downloadSuffix: "win32",
+    name: "Windows"
+  }
+};
+
+const platform = supportedPlatforms[process.platform];
+const platformName = platform ?
+  platform.name :
+  `UNKNOWN:${process.platform}`;
+console.log("You appear to be running on", platformName);
+
+requireBuild();
+
+const glob = require("glob");
+
+requireProtoc();
+
+if (existsSync(examplesGeneratedPath)) {
+  run(rimrafPath, examplesGeneratedPath);
+}
+
+mkdirSync(examplesGeneratedPath);
+
+run(protocPath,
+  `--proto_path=${__dirname}`,
+  `--plugin=protoc-gen-ts=${protocPluginPath}`,
+  `--js_out=import_style=commonjs,binary:${examplesGeneratedPath}`,
+  `--ts_out=service=true:${examplesGeneratedPath}`,
+  ...glob.sync(resolve(__dirname, "proto", "**/*.proto"))
+);
+
+run(rimrafPath, protocRoot);
+
+function requireBuild() {
+  console.log("Ensuring we have NPM packages installed...");
+  run("npm", "install");
+
+  console.log("Compiling ts-protoc-gen...");
+  run("npm", "run", "build");
+}
+
+function requireProtoc() {
+  if (existsSync(protocPath)) {
+    return;
+  }
+
+  if (!platform) {
+    throw new Error(
+      "Cannot download protoc. " +
+      platformName +
+      " is not currently supported by ts-protoc-gen"
+    );
+  }
+
+  console.log(`Downloading protoc v${protocVersion} for ${platform.name}`);
+  const protocUrl =
+    `https://github.com/google/protobuf/releases/download/v${protocVersion}/protoc-${protocVersion}-${platform.downloadSuffix}.zip`;
+
+  run(downloadPath,
+    "--extract",
+    "--out", protocRoot,
+    protocUrl);
+}
+
+function run(executablePath, ...args) {
+  const result = spawnSync(executablePath, args, { shell: true, stdio: "inherit" });
+  if (result.status !== 0) {
+    throw new Error(`Exited ${executablePath} with status ${result.status}`);
+  }
+}