Function generateSyntheticDiff

src/utils/gitDiff.ts:504–532

(
  gitPath: string,
  absoluteFilePath: string,
)

}

async function generateSyntheticDiff(
  gitPath: string,
  absoluteFilePath: string,
): Promise<Omit<ToolUseDiff, 'repository'> | null> {
  try {
    if (!isFileWithinReadSizeLimit(absoluteFilePath, MAX_DIFF_SIZE_BYTES)) {
      return null
    }
    const content = await readFile(absoluteFilePath, 'utf-8')
    const lines = content.split('\n')
    // Remove trailing empty line from split if file ends with newline
    if (lines.length > 0 && lines.at(-1) === '') {
      lines.pop()
    }
    const lineCount = lines.length
    const addedLines = lines.map(line => `+${line}`).join('\n')
    const patch = `@@ -0,0 +1,${lineCount} @@\n${addedLines}`
    return {
      filename: gitPath,
      status: 'added',
      additions: lineCount,
      deletions: 0,
      changes: lineCount,
      patch,
    }
  } catch {
    return null
  }
}