Scope (b0.B0_ocaml.Libresolver.Scope)

Scopes

type find = Conf.t -> B0_memo.t -> Libname.t -> Lib.t option B0_std.Fut.t

The type for the scope finding function.

type suggest =
  Conf.t ->
  B0_memo.t ->
  Libname.t ->
  string list option B0_std.Fut.t

The type for the scope missing library suggestion function.

type t

The type for scopes. A scope has a name, a library lookup function and possibly a function to indicate how to troubleshoot a missing library.

val make : name:string -> find:find -> suggest:suggest -> t

make ~name ~find ~suggest is a scope named name looking up libraries with find and giving suggestions on missing libraries with suggest.

Properties

val find : t -> find

find scope is the lookup function of scope.

val name : t -> string

name scope is the name of scope.

val suggest : t -> suggest

suggest scope is the suggestion function of scope

Predefined

val cache_dir_name : string

cache_dir_name is a name that can be used for the cache directory of resolution scopes.

val ocamlpath : cache_dir:B0_std.Fpath.t -> t

ocampath ~cache_dir looks up libraries according to the OCaml library convention in the OCAMLPATH of the memo using cache_dir to cache results.

Note. This is a nop for now.

val ocamlfind : cache_dir:B0_std.Fpath.t -> t

ocamlfind ~cache_dir looks up libraries using ocamlfind and caches the result in cache_dir.

A few simplyifing assumptions are made by the resolver, which basically boil down to query the library name LIB with:

ocamlfind query LIB -predicates byte,native -format …

to derive a Lib.t value (see the sources for the current -format arugment. This may fail on certain libraries. In particular it assumes a one-to-one map between ocamlfind package names and library names and that the archives are in the library directory.

Also the ocaml.threads, threads and threads.posix libraries are treated specially: they all lookup threads.posix with predicates mt,mt_posix on OCaml < 5.0.0 and simply threads otherwise. threads.vm is unsupported (but deprecated anyways).

val build : B0_build.t -> Conf.t -> t

build b conf is a library resolver scope for OCaml libraries that can be built in b. For a unit u to be recognized as such it has to:

It looks if the library name is defined by a unit that may be built. If that is the case it creates a library out of that build unit via Lib.of_unit and resolves to library name to it.
TODO public stuff