Merge pull request #3 from paritytech/yuri/auto-pnpm

Suggesting to install pnpm

Author: mutantcornholio

src/bin/main.ts

@@ -1,6 +1,7 @@
 #!/usr/bin/env node
 import { ExitPromptError } from "@inquirer/core";
 import { inquireDappData } from "#src/util/dappData";
+import { ensurePnpm } from "#src/util/ensurePnpm";
 import { spawnTemplate } from "#src/util/spawnTemplate";
 
 /* This is somewhat a hack to automatically include
@@ -11,6 +12,9 @@ import * as pkg from "../../package.json";
 
 (async () => {
   console.log(`${pkg.name} ${pkg.version}`);
+
+  await ensurePnpm();
+
   const dappData = await inquireDappData();
 
   await spawnTemplate(dappData);

src/util/ensurePnpm.ts

@@ -0,0 +1,31 @@
+import { confirm } from "@inquirer/prompts";
+import { spawnAndWait } from "#src/util/childProcess";
+import { colors as c, success } from "#src/util/log";
+import cp from "child_process";
+
+export async function ensurePnpm(): Promise<void> {
+  console.log(`${c.secondary(`Checking ${c.accent("pnpm")}`)}\n`);
+
+  try {
+    cp.execSync("pnpm --version", { stdio: "ignore" });
+
+    console.log(success(`${c.accent("pnpm")} is installed\n`));
+    return;
+  } catch (e) {
+    // Checking that it's an npx's "command not found" error
+    if (!(e instanceof Error) || !("status" in e) || e.status !== 127) {
+      throw e;
+    }
+  }
+
+  const res = await confirm({ message: `The template uses ${c.accent("pnpm")} as a package manager. Install it?` });
+
+  if (!res) {
+    console.error("Abort");
+    process.exit(1);
+  }
+
+  await spawnAndWait("npm", ["install", "-g", "pnpm"], {});
+
+  console.log(success(`${c.accent("pnpm")} has been installed\n`));
+}