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feat: add --language option to snippet command #227

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feat: add --language option to snippet command #227

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21 changes: 16 additions & 5 deletions src/main.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -12,8 +12,7 @@ import { readTablet } from './commands/read';
import { transliterateAssembly } from './commands/transliterate';
import { trimCache } from './commands/trim-cache';
import { TranslateResult, translateTypeScript, RosettaDiagnostic } from './index';
import { TargetLanguage } from './languages';
import { PythonVisitor } from './languages/python';
import { TARGET_LANGUAGES, TargetLanguage } from './languages';
import { VisualizeAstVisitor } from './languages/visualize';
import * as logging from './logging';
import { emitSupportPolicyInformation } from './support';
Expand All @@ -40,10 +39,14 @@ async function main() {
type: 'string',
describe: 'The file to translate (leave out for stdin)',
})
.option('language', {
type: 'string',
describe: 'Language ID to transliterate to',
})
.option('python', {
alias: 'p',
boolean: true,
description: 'Translate snippets to Python',
description: 'Translate snippets to Python. This will override --language option.',
}),
wrapHandler(async (args) => {
const result = translateTypeScript(await makeFileSource(args.FILE ?? '-', 'stdin.ts'), makeVisitor(args));
Expand Down Expand Up @@ -465,9 +468,17 @@ function wrapHandler<A extends { verbose?: number }, R>(handler: (x: A) => Promi
};
}

function makeVisitor(args: { python?: boolean }) {
function makeVisitor(args: { python?: boolean; language?: string }) {
if (args.python) {
return new PythonVisitor();
args.language = 'python';
}
if (args.language !== undefined) {
const lang = args.language.toUpperCase();
const language = Object.entries(TargetLanguage).find(([k]) => k === lang)?.[1];
if (language === undefined) {
throw new Error(`Unknown target language: ${lang}. Expected one of ${Object.keys(TargetLanguage).join(', ')}`);
}
return TARGET_LANGUAGES[language].createVisitor();
}
// Default to visualizing AST, including nodes we don't recognize yet
return new VisualizeAstVisitor();
Expand Down