Function checkAndWriteBlob

src/utils/walkerToTreeEntryMap.js:31–58

(fs, gitdir, dir, filepath, oid = null)

// make sure filepath, blob type and blob object (from loose objects) plus oid are in sync and valid
async function checkAndWriteBlob(fs, gitdir, dir, filepath, oid = null) {
  const currentFilepath = join(dir, filepath)
  const stats = await fs.lstat(currentFilepath)
  if (!stats) throw new NotFoundError(currentFilepath)
  if (stats.isDirectory())
    throw new InternalError(
      `${currentFilepath}: file expected, but found directory`
    )

  // Look for it in the loose object directory.
  const objContent = oid
    ? await readObjectLoose({ fs, gitdir, oid })
    : undefined
  let retOid = objContent ? oid : undefined
  if (!objContent) {
    await acquireLock({ fs, gitdir, currentFilepath }, async () => {
      const object = stats.isSymbolicLink()
        ? await fs.readlink(currentFilepath).then(posixifyPathBuffer)
        : await fs.read(currentFilepath)

      if (object === null) throw new NotFoundError(currentFilepath)

      retOid = await _writeObject({ fs, gitdir, type: 'blob', object })
    })
  }

  return retOid
}

async function processTreeEntries({ fs, dir, gitdir, entries }) {
  // make sure each tree entry has valid oid