feat: add init command

Author: enxg

src/cli.ts

@@ -6,6 +6,7 @@ import { URL } from 'url';
 
 import newCmd from '#commands/new';
 import generateCmd from '#commands/generate';
+import initCmd from '#commands/init';
 
 const sapphire = new Command();
 
@@ -30,4 +31,6 @@ sapphire
 	.argument('<name>', 'file name')
 	.action(generateCmd);
 
+sapphire.command('init').description('creates a config file on an existing Sapphire project').alias('i').action(initCmd);
+
 sapphire.parse(process.argv);

src/commands/init.ts

@@ -0,0 +1,37 @@
+import { PromptInit } from '#prompts';
+import prompts from 'prompts';
+import YAML from 'yaml';
+import { writeFile } from 'fs/promises';
+import FindUp from 'find-up';
+import chalk from 'chalk';
+
+const { red } = chalk;
+
+export default async () => {
+	const packageJson = await FindUp('package.json');
+	if (!packageJson) {
+		console.log(red("Can't find package.json"));
+		process.exit(1);
+	}
+
+	const response = await prompts(PromptInit);
+	if (!response.preconditions) return process.exit(1);
+
+	const config = {
+		projectLanguage: response.projectLanguage,
+		locations: {
+			base: response.base,
+			arguments: response.arguments,
+			commands: response.commands,
+			listeners: response.listeners,
+			preconditions: response.preconditions
+		},
+		customFileTemplates: {
+			enabled: response.cftEnabled,
+			location: response.cftLocation ?? ''
+		}
+	};
+
+	const file = response.configFormat === 'json' ? JSON.stringify(config, null, 2) : YAML.stringify(config);
+	return writeFile(`.sapphirerc.${response.configFormat}`, file);
+};