Function getSnippet

src/tools/FileEditTool/utils.ts:468–493

(
  originalFile: string,
  oldString: string,
  newString: string,
  contextLines: number = 4,
)

 * @returns The snippet and the starting line number
 */
export function getSnippet(
  originalFile: string,
  oldString: string,
  newString: string,
  contextLines: number = 4,
): { snippet: string; startLine: number } {
  // Use the original algorithm from FileEditTool.tsx
  const before = originalFile.split(oldString)[0] ?? ''
  const replacementLine = before.split(/\r?\n/).length - 1
  const newFileLines = applyEditToFile(
    originalFile,
    oldString,
    newString,
  ).split(/\r?\n/)

  // Calculate the start and end line numbers for the snippet
  const startLine = Math.max(0, replacementLine - contextLines)
  const endLine =
    replacementLine + contextLines + newString.split(/\r?\n/).length

  // Get snippet
  const snippetLines = newFileLines.slice(startLine, endLine)
  const snippet = snippetLines.join('\n')

  return { snippet, startLine: startLine + 1 }
}

export function getEditsForPatch(patch: StructuredPatchHunk[]): FileEdit[] {
  return patch.map(hunk => {