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TranspilerFacade.ts
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TranspilerFacade.ts
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import { File } from 'stryker-api/core';
import { Transpiler, FileLocation, TranspileResult, TranspilerOptions, TranspilerFactory } from 'stryker-api/transpile';
class NamedTranspiler {
constructor(public name: string, public transpiler: Transpiler) { }
}
export default class TranspilerFacade implements Transpiler {
private innerTranspilers: NamedTranspiler[];
constructor(options: TranspilerOptions, additionalTranspiler?: { name: string, transpiler: Transpiler }) {
this.innerTranspilers = options.config.transpilers
.map(transpilerName => new NamedTranspiler(transpilerName, TranspilerFactory.instance().create(transpilerName, options)));
if (additionalTranspiler) {
this.innerTranspilers.push(new NamedTranspiler(additionalTranspiler.name, additionalTranspiler.transpiler));
}
}
public transpile(files: File[]): Promise<TranspileResult> {
return this.performTranspileChain(this.createPassThruTranspileResult(files));
}
public getMappedLocation(sourceFileLocation: FileLocation): FileLocation {
return this.performMappedLocationChain(sourceFileLocation);
}
private performMappedLocationChain(
sourceFileLocation: FileLocation,
remainingChain: NamedTranspiler[] = this.innerTranspilers.slice()
): FileLocation {
const next = remainingChain.shift();
if (next) {
return this.performMappedLocationChain(next.transpiler.getMappedLocation(sourceFileLocation), remainingChain);
} else {
return sourceFileLocation;
}
}
private async performTranspileChain(
currentResult: TranspileResult,
remainingChain: NamedTranspiler[] = this.innerTranspilers.slice()
): Promise<TranspileResult> {
const next = remainingChain.shift();
if (next) {
const nextResult = await next.transpiler.transpile(currentResult.outputFiles);
if (nextResult.error) {
nextResult.error = `Execute ${next.name}: ${nextResult.error}`;
return nextResult;
} else {
return this.performTranspileChain(nextResult, remainingChain);
}
} else {
return currentResult;
}
}
private createPassThruTranspileResult(input: File[]): TranspileResult {
return {
error: null,
outputFiles: input
};
}
}