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Implementation of the V2 Git Index format (as V1 is deprecated).

The index file contains information used by Git to manage the state of working directory contents.

type time = {
  1. lsb32 : Int32.t;
    (*

    binary integer containg the lower 32 bits of the entry (file or symbolic link) timestamp.

    *)
  2. nsec : Int32.t;
    (*

    binary integer containg the lower 32 bits of the entry (file or symbolic link) more precise timestamp, if available.

    *)
}

The type for time values.

type mode = [
  1. | `Normal
  2. | `Exec
]

The type for files' permission in the index file.

val pp_mode : Format.formatter -> mode -> unit

Pretty print file modes.

type stat_info = {
  1. ctime : time;
  2. mtime : time;
  3. dev : Int32.t;
  4. inode : Int32.t;
  5. mode : mode;
    (*

    binary integer containg the lower 32 bits of the entry (file or symbolic link) file system entity type and permissions.

    *)
  6. uid : Int32.t;
  7. gid : Int32.t;
  8. size : Int32.t;
    (*

    binary integer containg the lower 32 bits of the entry (file or symbolic link) size.

    *)
}

These fields are used as a part of a heuristic to determine if the file system entity associated with this entry has changed. The names are very *nix centric but the exact contents of each field have no meaning to Git, besides exact match, except for the mode and size fields.

val pp_stats : Format.formatter -> stat_info -> unit

Pretty-print file stats.

type entry = {
  1. stats : stat_info;
  2. id : Hash.Blob.t;
  3. stage : int;
  4. name : string;
}
val pp_entry : Format.formatter -> entry -> unit

Human-readable representation of an index entry.

type extension_kind = [
  1. | `Tree
  2. | `Reuc
  3. | `Other of string
]

The type for extension kinds.

  • Tree is for cached tree
  • Reuc is for reuse undo
  • Link is for split index
  • Other is for other extension kinds
type extension = {
  1. kind : extension_kind;
  2. payload : string;
}

The type for extension payload.

val pp_extension : Format.formatter -> extension -> unit

Human-readable representation of the extension.

type t = private {
  1. entries : entry list;
  2. extensions : extension list;
}

Index entries are sorted by the byte sequence that comprises the entry name; with a secondary comparison of the stage bits if the entry name byte sequences are identical

val create : ?extensions:extension list -> entry list -> t

Create an index.

val empty : t

The empty index file.

include S with type t := t
val equal : t -> t -> bool

Are two objects equal?

val hash : t -> int

Hash an object.

val compare : t -> t -> int

Compare two objects.

val pp : t Fmt.t

pp is the pretty-printer for values of type t.

module type IO = IO with type t = t
module IO (D : Hash.DIGEST) : IO