Function wrapCallSite

packages/vite/src/module-runner/sourcemap/interceptor.ts:347–409

(frame: CallSite, state: State)

}

function wrapCallSite(frame: CallSite, state: State) {
  // provides interface backward compatibility
  if (state === undefined) state = { nextPosition: null, curPosition: null }

  if (frame.isNative()) {
    state.curPosition = null
    return frame
  }

  // Most call sites will return the source file from getFileName(), but code
  // passed to eval() ending in "//# sourceURL=..." will return the source file
  // from getScriptNameOrSourceURL() instead
  const source = frame.getFileName() || frame.getScriptNameOrSourceURL()
  if (source) {
    const line = frame.getLineNumber() ?? 0
    const column = (frame.getColumnNumber() ?? 1) - 1

    const position = mapSourcePosition({
      name: null,
      source,
      line,
      column,
    })
    state.curPosition = position
    frame = cloneCallSite(frame)
    const originalFunctionName = frame.getFunctionName
    frame.getFunctionName = function () {
      const name = (() => {
        if (state.nextPosition == null) return originalFunctionName()

        return state.nextPosition.name || originalFunctionName()
      })()
      return name === 'eval' && '_vite' in position ? null : name
    }
    frame.getFileName = function () {
      return position.source ?? null
    }
    frame.getLineNumber = function () {
      return position.line
    }
    frame.getColumnNumber = function () {
      return position.column + 1
    }
    frame.getScriptNameOrSourceURL = function () {
      return position.source!
    }
    return frame
  }

  // Code called using eval() needs special handling
  let origin = frame.isEval() && frame.getEvalOrigin()
  if (origin) {
    origin = mapEvalOrigin(origin)
    frame = cloneCallSite(frame)
    frame.getEvalOrigin = function () {
      return origin || undefined
    }
    return frame