Module Irmin_pack.VersionSource

Management of disk-format versions.

`V2 introduced the *_v2 kinds and deprecated the *_v1 ones. The upgrade of a pack file to `V2 was done silently the first time a used pushed a *_v2 entry to the pack file.

`V3 introduced the control file. It centralizes all the metadata that used to be contained in the header of other files (e.g. the version of the store used to be stored in each files, it is now solely stored in the control file). The upgrade of a store to `V3 was done silently when opening a store in rw mode.

Sourcetype t = [
  1. | `V1
  2. | `V2
  3. | `V3
  4. | `V4
]

The type for version numbers.

Sourceval compare : t -> t -> int
Sourceval latest : t
Sourceval pp : t Fmt.t

pp is the pretty-format for version numbers.

Sourceval to_bin : t -> string

to_bin t is the 8-bytes binary representation of t.

Sourceval of_bin : string -> t option

of_bin s is Some t is to_bin t is s and None otherwise.

Sourceval invalid_arg : string -> 'a

invalid_arg str raises Invalid_argument.

Sourceexception Invalid of {
  1. expected : t;
  2. found : t;
}