1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
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 { evaluate } from '@/interpreter';
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);
}
}
};
const doRepl = async (prompt = '~> ') => {
process.stdout.write(prompt);
for await (const line of console) {
const result = await evaluate(line);
console.log(result);
break;
}
await doRepl(prompt);
};
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) {
logger.info('Starting REPL...');
logger.info('Welcome to the CPS interpreter!');
}
};
main(args);
|
