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cherrypick/locales/generateDTS.js

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import * as fs from 'node:fs';
import { fileURLToPath } from 'node:url';
import { dirname } from 'node:path';
import * as yaml from 'js-yaml';
import ts from 'typescript';
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const parameterRegExp = /\{(\w+)\}/g;
function createMemberType(item) {
if (typeof item !== 'string') {
return ts.factory.createTypeLiteralNode(createMembers(item));
}
const parameters = Array.from(
item.matchAll(parameterRegExp),
([, parameter]) => parameter,
);
return parameters.length
? ts.factory.createTypeReferenceNode(
ts.factory.createIdentifier('ParameterizedString'),
[
ts.factory.createUnionTypeNode(
parameters.map((parameter) =>
ts.factory.createStringLiteral(parameter),
),
),
],
)
: ts.factory.createKeywordTypeNode(ts.SyntaxKind.StringKeyword);
}
function createMembers(record) {
return Object.entries(record).map(([k, v]) => {
const node = ts.factory.createPropertySignature(
undefined,
ts.factory.createStringLiteral(k),
undefined,
createMemberType(v),
);
if (typeof v === 'string') {
ts.addSyntheticLeadingComment(
node,
ts.SyntaxKind.MultiLineCommentTrivia,
`*
* ${v.replace(/\n/g, '\n * ')}
`,
true,
);
}
return node;
});
}
export default function generateDTS() {
const locale = yaml.load(fs.readFileSync(`${__dirname}/ja-JP.yml`, 'utf-8'));
const members = createMembers(locale);
const elements = [
ts.factory.createVariableStatement(
[ts.factory.createToken(ts.SyntaxKind.DeclareKeyword)],
ts.factory.createVariableDeclarationList(
[
ts.factory.createVariableDeclaration(
ts.factory.createIdentifier('kParameters'),
undefined,
ts.factory.createTypeOperatorNode(
ts.SyntaxKind.UniqueKeyword,
ts.factory.createKeywordTypeNode(ts.SyntaxKind.SymbolKeyword),
),
undefined,
),
],
ts.NodeFlags.Const,
),
),
ts.factory.createInterfaceDeclaration(
[ts.factory.createToken(ts.SyntaxKind.ExportKeyword)],
ts.factory.createIdentifier('ParameterizedString'),
[
ts.factory.createTypeParameterDeclaration(
undefined,
ts.factory.createIdentifier('T'),
ts.factory.createKeywordTypeNode(ts.SyntaxKind.StringKeyword),
ts.factory.createKeywordTypeNode(ts.SyntaxKind.StringKeyword),
),
],
undefined,
[
ts.factory.createPropertySignature(
undefined,
ts.factory.createComputedPropertyName(
ts.factory.createIdentifier('kParameters'),
),
undefined,
ts.factory.createTypeReferenceNode(
ts.factory.createIdentifier('T'),
undefined,
),
),
],
),
ts.factory.createInterfaceDeclaration(
[ts.factory.createToken(ts.SyntaxKind.ExportKeyword)],
ts.factory.createIdentifier('ILocale'),
undefined,
undefined,
[
ts.factory.createIndexSignature(
undefined,
[
ts.factory.createParameterDeclaration(
undefined,
undefined,
ts.factory.createIdentifier('_'),
undefined,
ts.factory.createKeywordTypeNode(ts.SyntaxKind.StringKeyword),
undefined,
),
],
ts.factory.createUnionTypeNode([
ts.factory.createKeywordTypeNode(ts.SyntaxKind.StringKeyword),
ts.factory.createTypeReferenceNode(
ts.factory.createIdentifier('ParameterizedString'),
),
ts.factory.createTypeReferenceNode(
ts.factory.createIdentifier('ILocale'),
undefined,
),
]),
),
],
),
ts.factory.createInterfaceDeclaration(
[ts.factory.createToken(ts.SyntaxKind.ExportKeyword)],
ts.factory.createIdentifier('Locale'),
undefined,
[
ts.factory.createHeritageClause(ts.SyntaxKind.ExtendsKeyword, [
ts.factory.createExpressionWithTypeArguments(
ts.factory.createIdentifier('ILocale'),
undefined,
),
]),
],
members,
),
ts.factory.createVariableStatement(
[ts.factory.createToken(ts.SyntaxKind.DeclareKeyword)],
ts.factory.createVariableDeclarationList(
[
ts.factory.createVariableDeclaration(
ts.factory.createIdentifier('locales'),
undefined,
ts.factory.createTypeLiteralNode([
ts.factory.createIndexSignature(
undefined,
[
ts.factory.createParameterDeclaration(
undefined,
undefined,
ts.factory.createIdentifier('lang'),
undefined,
ts.factory.createKeywordTypeNode(
ts.SyntaxKind.StringKeyword,
),
undefined,
),
],
ts.factory.createTypeReferenceNode(
ts.factory.createIdentifier('Locale'),
undefined,
),
),
]),
undefined,
),
],
ts.NodeFlags.Const,
),
),
ts.factory.createFunctionDeclaration(
[ts.factory.createModifier(ts.SyntaxKind.ExportKeyword)],
undefined,
ts.factory.createIdentifier('build'),
undefined,
[],
ts.factory.createTypeReferenceNode(
ts.factory.createIdentifier('Locale'),
undefined,
),
undefined,
),
ts.factory.createExportDefault(ts.factory.createIdentifier('locales')),
];
ts.addSyntheticLeadingComment(
elements[0],
ts.SyntaxKind.MultiLineCommentTrivia,
' eslint-disable ',
true,
);
ts.addSyntheticLeadingComment(
elements[0],
ts.SyntaxKind.SingleLineCommentTrivia,
' This file is generated by locales/generateDTS.js',
true,
);
ts.addSyntheticLeadingComment(
elements[0],
ts.SyntaxKind.SingleLineCommentTrivia,
' Do not edit this file directly.',
true,
);
const printed = ts
.createPrinter({
newLine: ts.NewLineKind.LineFeed,
})
.printList(
ts.ListFormat.MultiLine,
ts.factory.createNodeArray(elements),
ts.createSourceFile(
'index.d.ts',
'',
ts.ScriptTarget.ESNext,
true,
ts.ScriptKind.TS,
),
);
fs.writeFileSync(`${__dirname}/index.d.ts`, printed, 'utf-8');
}