Module Cudf

module Cudf: sig .. end

CUDF library

CUDF documents

type package = {

	`package : Cudf_types.pkgname;`
	`version : Cudf_types.version;`
	`depends : Cudf_types.vpkgformula;`
	`conflicts : Cudf_types.vpkglist;`
	`provides : Cudf_types.veqpkglist;`
	`installed : bool;`
	`was_installed : bool;`
	`keep : Cudf_types.enum_keep;`
	`pkg_extra : Cudf_types.typed_value Cudf_types.stanza;`

}

Representation of a parsed package description item.

With this representation, optional properties have already been expanded to their default values (if they have one). It is not possible to know whether they were present or not in the CUDF syntax.

val (=%) : package -> package -> bool

package equality up to <name, version> i.e. 2 packages are equal iff they have the same name and version

val (<%) : package -> package -> int

Package comparison up to <name, version>. Same rules of package equality, but providing a suitable replacement for Pervasives.compare; useful for sorting.

type request = {

	`request_id : string;`
	`install : Cudf_types.vpkglist;`
	`remove : Cudf_types.vpkglist;`
	`upgrade : Cudf_types.vpkglist;`
	`req_extra : Cudf_types.typed_value Cudf_types.stanza;`

}
type preamble = {

`preamble_id : string;`	`(*`	text following the "preamble: " postmark	`*)`
`property : Cudf_types.typedecl;`	`(*`	extra property declarations	`*)`
`univ_checksum : string;`	`(*`	universe checksum	`*)`
`status_checksum : string;`	`(*`	status checksum	`*)`
`req_checksum : string;`	`(*`	request checksum	`*)`

}

val default_preamble : preamble

implement preamble defaults

val default_package : package

implement package defaults

val default_request : request

implement request defaults

Syntactic CUDF representation

type cudf_doc = preamble option * package list * request

a CUDF document with its information items

type cudf_item = [ `Package of package
       | `Preamble of preamble
       | `Request of request ]

a single information item

Semantic CUDF representation

exception Constraint_violation of string

violation of a constraint imposed by CUDF specification

type universe

package universe (including package status, i.e., installed packages)

type cudf = preamble * universe * request

type solution = preamble * universe

CUDF-based encoding of solutions, see CUDF 2.0, appendix B

A universe encoding a solution matters only for its installed packages, which are considered to be the resulting package status

val load_universe : package list -> universe

Raises Constraint_violation when a global CUDF constraint is violated in the given package list

CUDF manipulation

val lookup_package : universe -> Cudf_types.pkgname * Cudf_types.version -> package

Lookup a specific package via a <name, version> key
Raises Not_found if the requested package cannot be found

val mem_package : universe -> Cudf_types.pkgname * Cudf_types.version -> bool

Check existence of a specific package in the universe via a <name, version> key

val mem_installed : ?include_features:bool ->
       ?ignore:(package -> bool) -> universe -> Cudf_types.vpkg -> bool

check wheather a given package constraint is satisfied in a given package status (i.e., the universe subset of installed packages)

include_features : allow constraint to be satisfied by features (i.e., Provides). Default: true

ignore : make the lookup skip over all packages matching the given package predicate. Default: do not ignore any package

val who_provides : universe ->
       Cudf_types.vpkg -> (package * Cudf_types.version option) list

Ask who provides a given feature (predicate). Note: only installed=true packages are considered by this function.
Returns a list of packages providing the requested feature. Each package is paired with an optional version; if it is None, the given package provides all possible version of the feature; it if is Some v, the given package only provides version v of the feature.

val lookup_packages : ?filter:Cudf_types.constr ->
       universe -> Cudf_types.pkgname -> package list

lookup all available versions of a given package name

filter : filter the found packages according to the given version constraint. Default: None (i.e., no filtering)

val get_installed : universe -> Cudf_types.pkgname -> package list

lookup all installed versions of a given package name. Shorthand for lookup_packages composed with filtering on installed=true

val iter_packages : (package -> unit) -> universe -> unit

val fold_packages : ('a -> package -> 'a) -> 'a -> universe -> 'a

val get_packages : ?filter:(package -> bool) -> universe -> package list

conversion from universe to plain package list

filter : only return packages matching a given predicate. Default is to return all packages

val universe_size : universe -> int

total numer of available packages (no matter whether they are installed or not)

val installed_size : universe -> int

total number of installed packages occurring in the universe

val status : universe -> universe

Projection on packages having "installed: true".

Inefficient (involves Hashtbl.t cloning), use with care.

Low-level stanza manipulation

val lookup_package_property : package -> string -> string

low-level property lookup: given a package, lookup on it a property by name, returning its (pretty-printed, see Cudf_types) value as a string
Raises Not_found if the given property name is not associated to the given package (note that "being associated with" does not necessarily mean that the property appears in the stanza, due to default values)

val lookup_request_property : request -> string -> string

Same as Cudf.lookup_package_property, but acting on request information items.

To lookup the request identifier as a string (which strictly speaking is not a property) you should lookup "request"

val lookup_preamble_property : preamble -> string -> string

Same as Cudf.lookup_package_property, but acting on preamble information items.

To lookup the preamble identifier as a string (which strictly speaking is not a property) you should lookup "preamble"

val version_matches : Cudf_types.version -> Cudf_types.constr -> bool

Check whether a version matches a version constraint, e.g. version_matches 1 (Some(`Eq, 2)) = false

val (|=) : Cudf_types.version -> Cudf_types.constr -> bool

Same as Cudf.version_matches