Function extractFileDiffsFromCommit

evals/buffbench/gen-evals.ts:33–88

(
  repoPath: string,
  commitSha: string,
  parentSha: string,
)

}

async function extractFileDiffsFromCommit(
  repoPath: string,
  commitSha: string,
  parentSha: string,
): Promise<FileDiff[]> {
  const fileDiffs: FileDiff[] = []

  const filesOutput = execSync(
    `git diff --name-status ${parentSha} ${commitSha}`,
    { cwd: repoPath, encoding: 'utf-8' },
  )

  const lines = filesOutput.trim().split('\n').filter(Boolean)

  for (const line of lines) {
    const [status, ...pathParts] = line.split('\t')
    const filePath = pathParts[pathParts.length - 1]

    let statusType: FileDiff['status'] = 'modified'
    let oldPath: string | undefined

    if (status === 'A') {
      statusType = 'added'
    } else if (status === 'D') {
      statusType = 'deleted'
    } else if (status.startsWith('R')) {
      statusType = 'renamed'
      oldPath = pathParts[0]
    }

    const oldContent = getFileContentAtCommit(
      repoPath,
      parentSha,
      oldPath || filePath,
    )
    const newContent = getFileContentAtCommit(repoPath, commitSha, filePath)

    const diff = createTwoFilesPatch(
      oldPath || filePath,
      filePath,
      oldContent,
      newContent,
      `${parentSha.slice(0, 7)} (parent)`,
      `${commitSha.slice(0, 7)} (commit)`,
    )

    fileDiffs.push({
      path: filePath,
      status: statusType,
      oldPath,
      diff,
    })
  }

  return fileDiffs
}

function getFullDiff(