Function buildSubmoduleDiff

app/src/lib/git/diff.ts:765–809

(
  buffer: Buffer,
  repository: Repository,
  file: FileChange,
  status: SubmoduleStatus
)

}

async function buildSubmoduleDiff(
  buffer: Buffer,
  repository: Repository,
  file: FileChange,
  status: SubmoduleStatus
): Promise<IDiff> {
  const path = file.path
  const fullPath = Path.join(repository.path, path)
  const url = await getConfigValue(repository, `submodule.${path}.url`, true)

  let oldSHA = null
  let newSHA = null

  if (
    status.commitChanged ||
    file.status.kind === AppFileStatusKind.New ||
    file.status.kind === AppFileStatusKind.Deleted
  ) {
    const diff = buffer.toString('utf-8')
    const lines = diff.split('\n')
    const baseRegex = 'Subproject commit ([^-]+)(-dirty)?$'
    const oldSHARegex = new RegExp('-' + baseRegex)
    const newSHARegex = new RegExp('\\+' + baseRegex)
    const lineMatch = (regex: RegExp) =>
      lines
        .flatMap(line => {
          const match = line.match(regex)
          return match ? match[1] : []
        })
        .at(0) ?? null

    oldSHA = lineMatch(oldSHARegex)
    newSHA = lineMatch(newSHARegex)
  }

  return {
    kind: DiffType.Submodule,
    fullPath,
    path,
    url,
    status,
    oldSHA,
    newSHA,
  }
}

async function buildDiff(
  buffer: Buffer,