Function parseSingleFFOrSafariStack

packages/utils/src/source-map.ts:78–135

(raw: string)

}

export function parseSingleFFOrSafariStack(raw: string): ParsedStack | null {
  let line = raw.trim()

  if (SAFARI_NATIVE_CODE_REGEXP.test(line)) {
    return null
  }

  if (line.includes(' > eval')) {
    line = line.replace(
      / line (\d+)(?: > eval line \d+)* > eval:\d+:\d+/g,
      ':$1',
    )
  }

  // Early return for lines that don't look like Firefox/Safari stack traces
  // Firefox/Safari stack traces must contain '@' and should have location info after it
  if (!line.includes('@')) {
    return null
  }

  // Find the correct @ that separates function name from location
  // For cases like '@https://@fs/path' or 'functionName@https://@fs/path'
  // we need to find the first @ that precedes a valid location (containing :)
  let atIndex = -1
  let locationPart = ''
  let functionName: string | undefined

  // Try each @ from left to right to find the one that gives us a valid location
  for (let i = 0; i < line.length; i++) {
    if (line[i] === '@') {
      const candidateLocation = line.slice(i + 1)
      // Minimum length 3 for valid location: 1 for filename + 1 for colon + 1 for line number (e.g., "a:1")
      if (candidateLocation.includes(':') && candidateLocation.length >= 3) {
        atIndex = i
        locationPart = candidateLocation
        functionName = i > 0 ? line.slice(0, i) : undefined
        break
      }
    }
  }

  // Validate we found a valid location with minimum length (filename:line format)
  if (atIndex === -1 || !locationPart.includes(':') || locationPart.length < 3) {
    return null
  }
  const [url, lineNumber, columnNumber] = extractLocation(locationPart)

  if (!url || !lineNumber || !columnNumber) {
    return null
  }

  return {
    file: url,
    method: functionName || '',
    line: Number.parseInt(lineNumber),
    column: Number.parseInt(columnNumber),
  }
}