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AnyCodable is a wrapper type for polymorphic codables, in which the type of the serialized data is not known at compile time.

• string typeIdentifier = 1

  A string identifier to map the runtime bytes into a specific type, for deserialization.

• bytes serializedBytes = 2

  The serialized bytes of the underlying data structure.

/ FXDataID represents the digest of arbitrary data, and its purpose is to be a handler for interfacing with CAS / systems. FXDataID does not require the encoding of any particular hash function. Instead, it is expected that the / CAS system itself that provides the digest.

Used in: FXPBCASObject

• bytes raw_bytes = 1

  / The bytes containing the digest of the contents store in the CAS.

/ The list of file names and associated information, of a directory. / * The children are sorted by name. / * FIXME: collation rules or UTF-8 normalization guarantees?

Used in: FXFileInfo

• repeated FXDirectoryEntry entries = 1

Used in: FXDirectoryEntries

• string name = 1

  / The name of the directory entry.

• FXFileType type = 2

  / The type of the directory entry.

• uint64 size = 3

  / The (aggregate) size of the directory entry.

• optional FXPosixFileDetails posixDetails = 4

  / Mode and permissions. _Can_ optionally be present in the / directory entry because the file can be just a direct blob reference.

Used in: FXFileInfo

• NONE = 0

  / No compression is applied.

• FXFileType type = 1

  / The type of the CASTree entry.

• uint64 size = 2

  / The file data size or the aggregate directory data size (recursive). / Whether directory data includes the size of the directory catalogs / is unspecified.

• uint32 posixPermissions = 3

  / OBSOLETE. Use posixDetails. / The POSIX permissions (&0o777). Useful when storing entries / with very restricted permissions (such as (perm & 0o007) == 0).

• FXFileDataCompressionMethod compression = 4

  / Whether and what compression is applied to file data. / * Compression ought not to be applied to symlinks. / * Compression is applied after chunking, to retain seekability.

• optional FXPosixFileDetails posixDetails = 5

  / Permission info useful for POSIX filesystems.

• oneof payload

  • uint64 fixedChunkSize = 11

    / Files and symlinks: / * The file payload is contained in one or more / fixed size references to [compressed] data. / * The `fixedChunkSize` value helps to do O(1) seeking.

  • FXDirectoryEntries inlineChildren = 12

    / Directories: / * Directory entries are represented inline.

  • uint32 referencedChildrenTree = 13

    / Directories: / * Directory entries are represented as a reference to a B-tree. / * The `compression` does have effect on the B-tree data.

Used in: FXDirectoryEntry, FXFileInfo

• PLAIN_FILE = 0

  / A plain file.

• EXECUTABLE = 1

  / An executable file.

• DIRECTORY = 2

  / A directory.

• SYMLINK = 3

  / A symbolic link.

/ FXPBCASObject represents the serialized from of CASObjects. It encodes the / combination of the raw data of the object and its dependendent references.

• repeated FXDataID refs = 1

• bytes data = 2

Used in: FXDirectoryEntry, FXFileInfo

• uint32 mode = 1

  / The POSIX permissions (&0o7777). Masking is useful when storing entries / with very restricted permissions (such as (perm & 0o0007) == 0).

• uint32 owner = 2

  / Owner user identifier. / Semantically, absent owner == 0x0 ~= current uid.

• uint32 group = 3

  / Owner group identifier. / Semantically, absent owner == 0x0 ~= current gid.