/
preprocessor.ts
77 lines (67 loc) · 2.51 KB
/
preprocessor.ts
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import { ParserOptions, parse as babelParser } from '@babel/parser';
import traverse, { NodePath } from '@babel/traverse';
import { ImportDeclaration, isTSModuleDeclaration } from '@babel/types';
import { PrettierOptions } from '../types';
import { getCodeFromAst } from '../utils/get-code-from-ast';
import { getExperimentalParserPlugins } from '../utils/get-experimental-parser-plugins';
import { getSortedNodes } from '../utils/get-sorted-nodes';
export function preprocessor(code: string, options: PrettierOptions): string {
const {
importOrderParserPlugins,
importOrder,
importOrderBuiltinModulesToTop,
importOrderCaseInsensitive,
importOrderGroupNamespaceSpecifiers,
importOrderMergeDuplicateImports,
importOrderCombineTypeAndValueImports,
importOrderSeparation,
importOrderSortSpecifiers,
} = options;
if (
importOrderCombineTypeAndValueImports &&
!importOrderMergeDuplicateImports
) {
console.warn(
'[@ianvs/prettier-plugin-sort-imports]: Enabling importOrderCombineTypeAndValueImports will have no effect unless importOrderMergeDuplicateImports is also enabled.',
);
}
const allOriginalImportNodes: ImportDeclaration[] = [];
const parserOptions: ParserOptions = {
sourceType: 'module',
plugins: getExperimentalParserPlugins(importOrderParserPlugins),
};
const ast = babelParser(code, parserOptions);
const directives = ast.program.directives;
const interpreter = ast.program.interpreter;
traverse(ast, {
ImportDeclaration(path: NodePath<ImportDeclaration>) {
const tsModuleParent = path.findParent((p) =>
isTSModuleDeclaration(p),
);
if (!tsModuleParent) {
allOriginalImportNodes.push(path.node);
}
},
});
// short-circuit if there are no import declarations
if (allOriginalImportNodes.length === 0) {
return code;
}
const nodesToOutput = getSortedNodes(allOriginalImportNodes, {
importOrder,
importOrderBuiltinModulesToTop,
importOrderCaseInsensitive,
importOrderGroupNamespaceSpecifiers,
importOrderMergeDuplicateImports,
importOrderCombineTypeAndValueImports,
importOrderSeparation,
importOrderSortSpecifiers,
});
return getCodeFromAst({
nodesToOutput,
allOriginalImportNodes,
originalCode: code,
directives,
interpreter,
});
}