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A Node.js utility that can be used to determine what function and file your function was called from
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| /** | |
| * A Node.js utility that can be used to determine what function | |
| * and file your function was called from. Useful for debugging | |
| * large/complex codebases. | |
| * | |
| * @returns {{ | |
| * fnName: string; | |
| * filePath: string; | |
| * lineNumber: number; | |
| * columnNumber: number; | |
| * } | null} | |
| */ | |
| function getFnCaller() { | |
| const error = new Error(); | |
| if (!error.stack) return null; | |
| // index 0 is the error name | |
| // index 1 is this fn's stack line | |
| // index 2 is the fn that called this fn | |
| // index 3, finally, is the one that called this fn's caller | |
| const callerLine = error.stack.split('\n')[3]; | |
| if (!callerLine) return null; | |
| const trimmedCallerLine = callerLine | |
| .split('at ')[1] | |
| .replace('file://', '') | |
| .replace(process.cwd() + '/', ''); | |
| const [, fnName, filePath, lineNumber, columnNumber] = | |
| trimmedCallerLine.match(/^([^ ]+)\s+\(([^:]+):(\d+):(\d+)\)$/) || []; | |
| if (fnName && filePath && lineNumber && columnNumber) { | |
| return { | |
| fnName, | |
| filePath, | |
| lineNumber: parseInt(lineNumber), | |
| columnNumber: parseInt(columnNumber), | |
| }; | |
| } | |
| return null; | |
| } |
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