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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* This module builds a VCS like interface on top of Dag, used to build
a Dag instance by the State Transaction Machine.
This data structure does not hold system states:
- Edges are meant to hold a diff.
The delta between two states, or equivalent data like a vernac_expr whose
execution corresponds to the application of the diff.
- Nodes are empty, unless one adds explicit info.
The info could be a system state, obtaind by applying all the diffs
from the initial state, but is not necessarily there.
As a consequence, "checkout" just updates the current branch.
The type [id] is the type of commits (a node in the dag)
The type [Vcs.t] has 3 parameters:
['info] data attached to a node (like a system state)
['diff] data attached to an edge (the commit content, a "patch")
['kind] extra data attached to a branch (like being the master branch)
*)
module type S = sig
module Branch :
sig
type t
val make : string -> t
val equal : t -> t -> bool
val compare : t -> t -> int
val to_string : t -> string
val master : t
end
type id
type ('kind) branch_info = {
kind : [> `Master] as 'kind;
root : id;
pos : id;
}
type ('kind,'diff,'info) t constraint 'kind = [> `Master ]
val empty : id -> ('kind,'diff,'info) t
val current_branch : ('k,'e,'i) t -> Branch.t
val branches : ('k,'e,'i) t -> Branch.t list
val get_branch : ('k,'e,'i) t -> Branch.t -> 'k branch_info
val reset_branch : ('k,'e,'i) t -> Branch.t -> id -> ('k,'e,'i) t
val branch :
('kind,'e,'i) t -> ?root:id -> ?pos:id ->
Branch.t -> 'kind -> ('kind,'e,'i) t
val delete_branch : ('k,'e,'i) t -> Branch.t -> ('k,'e,'i) t
val merge :
('k,'diff,'i) t -> id -> ours:'diff -> theirs:'diff -> ?into:Branch.t ->
Branch.t -> ('k,'diff,'i) t
val commit : ('k,'diff,'i) t -> id -> 'diff -> ('k,'diff,'i) t
val rewrite_merge :
('k,'diff,'i) t -> id -> ours:'diff -> theirs:'diff -> at:id ->
Branch.t -> ('k,'diff,'i) t
val checkout : ('k,'e,'i) t -> Branch.t -> ('k,'e,'i) t
val set_info : ('k,'e,'info) t -> id -> 'info -> ('k,'e,'info) t
val get_info : ('k,'e,'info) t -> id -> 'info option
module NodeSet : Set.S with type elt = id
(* Removes all unreachable nodes and returns them *)
val gc : ('k,'e,'info) t -> ('k,'e,'info) t * NodeSet.t
val reachable : ('k,'e,'info) t -> id -> NodeSet.t
(* read only dag *)
module Dag : Dag.S with type node = id
val dag : ('kind,'diff,'info) t -> ('diff,'info,id * id) Dag.t
val create_cluster : ('k,'e,'i) t -> id list -> (id * id) -> ('k,'e,'i) t
val cluster_of : ('k,'e,'i) t -> id -> (id * id) Dag.Cluster.t option
val delete_cluster : ('k,'e,'i) t -> (id * id) Dag.Cluster.t -> ('k,'e,'i) t
end
module Make(OT : Map.OrderedType) : S with type id = OT.t
|
