Function tryApplyPatchWithFallbacks

sdk/src/tools/apply-patch.ts:501–550

(params: {
  oldContent: string
  diff: string
})

}

function tryApplyPatchWithFallbacks(params: {
  oldContent: string
  diff: string
}): {
  patched: string | null
  attemptedStrategies: string[]
  lastError?: string
} {
  const attempts = buildPatchAttempts(params.oldContent, params.diff)
  const attemptedStrategies: string[] = []
  let lastError: string | undefined

  const seen = new Set<string>()

  for (const attempt of attempts) {
    const key = JSON.stringify({
      source: attempt.source,
      diff: attempt.diff,
    })

    if (seen.has(key)) {
      continue
    }

    seen.add(key)
    attemptedStrategies.push(attempt.name)

    try {
      const { result: patched } = applyDiff(attempt.source, attempt.diff, 'default')

      if (patchHasIntendedChanges(attempt.diff) && patched === attempt.source) {
        lastError = 'Patch produced no content changes'
        continue
      }

      return {
        patched,
        attemptedStrategies,
      }
    } catch (error) {
      lastError = error instanceof Error ? error.message : String(error)
    }
  }

  return {
    patched: null,
    attemptedStrategies,
    ...(lastError ? { lastError } : {}),
  }
}

function formatPatchFailureMessage(params: {
  path: string