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import { args, type Args } from '@/args';
import { join } from 'path';
import { watch } from 'fs/promises';
import { generateParser, GRAMMAR_FILE, GENERATED_PARSER } from '@/parser';
import {
ConsoleTracingLogger,
type LogLevel,
type TracingLogger,
} from '@/utils';
import { doRepl } from './repl';
const LOG_LEVELS: LogLevel[] = ['info', 'warn', 'error'];
const devMode = async (logger: TracingLogger) => {
logger.info('Watching for changes in parser...');
const watcher = watch(import.meta.dir, { recursive: true });
for await (const event of watcher) {
if (event.filename?.endsWith(GRAMMAR_FILE)) {
const grammarFile = join(import.meta.dir, event.filename);
const outputFile = join(
import.meta.dir,
event.filename.replace(GRAMMAR_FILE, GENERATED_PARSER),
);
logger.info(
`Generating parser at Location=(${grammarFile}) to Source=(${outputFile})...`,
);
generateParser(grammarFile, outputFile);
}
}
};
export const main = async (args: Args) => {
if (args.devMode) {
LOG_LEVELS.push('debug');
}
const logger = new ConsoleTracingLogger('main', LOG_LEVELS);
if (args.devMode) {
logger.info('Starting in dev mode...');
await devMode(logger);
}
if (args.repl) {
await doRepl(logger);
}
return 0;
};
main(args).then(code => process.exit(code));
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