[cli] Add "dev" script, remove "build-dev" script (#8222)

I don't think anyone is using this command anymore in the world of M1.

Anyways, we should be using `ts-node` to execute the CLI from source code instead of skipping steps at build-time to iterate quickly.

packages/cli/README.md

@@ -53,13 +53,13 @@ At this point you can make modifications to the CLI source code and test them ou
 cd packages/cli
 ```
 
-From within the `packages/cli` directory, you can use the `ts-node` command line tool to quickly excute Vercel CLI from its TypeScript source code directly (without having to manually compile first). For example:
+From within the `packages/cli` directory, you can use the "dev" script to quickly execute Vercel CLI from its TypeScript source code directly (without having to manually compile first). For example:
 
 ```bash
-npx ts-node src/index.ts
-npx ts-node src/index.ts login
-npx ts-node src/index.ts switch --debug
-npx ts-node src/index.ts dev
+yarn dev deploy
+yarn dev whoami
+yarn dev login
+yarn dev switch --debug
 ```
 
 When you are satisfied with your changes, make a commit and create a pull request!

packages/cli/package.json

@@ -19,7 +19,7 @@
     "prepublishOnly": "yarn build",
     "coverage": "codecov",
     "build": "ts-node ./scripts/build.ts",
-    "build-dev": "ts-node ./scripts/build.ts --dev"
+    "dev": "ts-node ./src/index.ts"
   },
   "bin": {
     "vc": "./dist/index.js",

packages/cli/scripts/build.ts

@@ -27,9 +27,6 @@ function envToString(key: string) {
 }
 
 async function main() {
-  const isDev = process.argv[2] === '--dev';
-
-  if (!isDev) {
   // Read the secrets from GitHub Actions and generate a file.
   // During local development, these secrets will be empty.
   await createConstants();
@@ -45,15 +42,16 @@ async function main() {
   await execa(process.execPath, [join(__dirname, 'compile-templates.js')], {
     stdio: 'inherit',
   });
-  }
 
   // Do the initial `ncc` build
   console.log();
-  const args = ['ncc', 'build', '--external', 'update-notifier'];
-  if (isDev) {
-    args.push('--source-map');
-  }
-  args.push('src/index.ts');
+  const args = [
+    'ncc',
+    'build',
+    '--external',
+    'update-notifier',
+    'src/index.ts',
+  ];
   await execa('yarn', args, { stdio: 'inherit', cwd: dirRoot });
 
   // `ncc` has some issues with `@vercel/fun`'s runtime files: