package opam-0install-cudf

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opam-0install-cudf
- Opam_0install_cudf

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Module
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type t

type selections

type diagnostics

val create : 
  ?prefer_oldest:bool ->
  constraints:
    (Cudf_types.pkgname * (Cudf_types.relop * Cudf_types.version)) list ->
  Cudf.universe ->
  t

create ~constraints universe is a solver that gets candidates from universe, filtering them using constraints.

parameter prefer_oldest
if true the solver is set to return the least up-to-date version of each package, if a solution exists. This is false by default.
@before 0.4
the prefer_oldest parameter did not exist.

val solve : 
  t ->
  (Cudf_types.pkgname * [ `Essential | `Recommended ]) list ->
  (selections, diagnostics) Stdlib.result

solve t packages finds a compatible set of package versions that includes all packages in packages according to their requirement tag, and their required dependencies if needed.

val packages_of_result : 
  selections ->
  (Cudf_types.pkgname * Cudf_types.version) list

val diagnostics : ?verbose:bool -> diagnostics -> string

diagnostics d is a message explaining why d failed, generated by performing another solve which doesn't abort on failure.