fix(nuxi): show an error if no value is supplied for the --template flag

[jamesgeorge007]

🔗 Linked issue

nuxt/nuxt#12608

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Previously not supplying a value with the --template flag results in the following error.

This PR aims at showing an error message and exiting with a code of 1 in this scenario.

📝 Checklist

• I have linked an issue or discussion.
• [ ] I have updated the documentation accordingly.

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[pi0]

Thanks

[jamesgeorge007]

@pi0, I noticed that a failed attempt to download the template results in the stack trace being logged in to the console. May I know if it's intentional? Else, we could wrap it within a try-catch block.

framework/packages/nuxi/src/commands/init.ts

Lines 26 to 32 in da38c62

	const t = await downloadTemplate(template, {
	dir: args._[0] as string,
	force: args.force,
	offline: args.offline,
	preferOffline: args['prefer-offline'],
	registry: process.env.NUXI_INIT_REGISTRY || DEFAULT_REGISTRY
	})

[pi0]

That would be an excellent DX enhancement indeed.

We can give a more precise message from unjs/giget as well (if download fails without local cache, etc), and in nuxi cli, use error.toString() with it's custom implementation from giget (this way unexpected errors preserve their stack)