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transform.ts

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import {

CompilerOptions,

concatenate,

DiagnosticWithLocation,

factory,

fixupCompilerOptions,

isArray,

Node,

TransformationResult,

TransformerFactory,

transformNodes,

} from "./_namespaces/ts";

/**

* Transform one or more nodes using the supplied transformers.

* @param source A single `Node` or an array of `Node` objects.

* @param transformers An array of `TransformerFactory` callbacks used to process the transformation.

* @param compilerOptions Optional compiler options.

*/

export function transform<T extends Node>(source: T | T[], transformers: TransformerFactory<T>[], compilerOptions?: CompilerOptions): TransformationResult<T> {

const diagnostics: DiagnosticWithLocation[] = [];

compilerOptions = fixupCompilerOptions(compilerOptions!, diagnostics); // TODO: GH#18217

const nodes = isArray(source) ? source : [source];

const result = transformNodes(/*resolver*/ undefined, /*host*/ undefined, factory, compilerOptions, nodes, transformers, /*allowDtsFiles*/ true);

result.diagnostics = concatenate(result.diagnostics, diagnostics);

return result;

}