A.34 library(prolog_pack): A package manager for Prolog

See also

Installed packages can be inspected using ?- doc_browser.

To be done

- Version logic
- Find and resolve conflicts
- Upgrade git packages
- Validate git packages
- Test packages: run tests from directory‘test'.

The library(prolog_pack) provides the SWI-Prolog package manager. This library lets you inspect installed packages, install packages, remove packages, etc. It is complemented by the built-in attach_packs/0 that makes installed packages available as libraries.

[det]pack_list_installed

List currently installed packages. Unlike pack_list/1, only locally installed packages are displayed and no connection is made to the internet.

See also

Use pack_list/1 to find packages.

pack_info(+Pack)

Print more detailed information about Pack.

[det]pack_search(+Query)

[det]pack_list(+Query)

Query package server and installed packages and display results. Query is matches case-insensitively against the name and title of known and installed packages. For each matching package, a single line is displayed that provides:

• Installation status
  • p: package, not installed
  • i: installed package; up-to-date with public version
  • U: installed package; can be upgraded
  • A: installed package; newer than publically available
  • l: installed package; not on server

• Name@Version
• Name@Version(ServerVersion)
• Title

Hint: ?- pack_list(''). lists all packages.

The predicates pack_list/1 and pack_search/1 are synonyms. Both contact the package server at http://www.swi-prolog.org to find available packages.

See also

pack_list_installed/0 to list installed packages without contacting the server.

[det]pack_install(+Spec:atom)

Install a package. Spec is one of

• Archive file name
• HTTP URL of an archive file name. This URL may contain a star (*) for the version. In this case pack_install asks for the directory content and selects the latest version.
• GIT URL (not well supported yet)
• A local directory name given as file:// URL.
• A package name. This queries the package repository at http://www.swi-prolog.org

After resolving the type of package, pack_install/2 is used to do the actual installation.

[det]pack_install(+Name, +Options)

Install package Name. Processes the options below. Default options as would be used by pack_install/1 are used to complete the provided Options.

url(+URL)

Source for downloading the package

package_directory(+Dir)

Directory into which to install the package

interactive(+Boolean)

Use default answer without asking the user if there is a default action.

silent(+Boolean)

If true (default false), suppress informational progress messages.

upgrade(+Boolean)

If true (default false), upgrade package if it is already installed.

git(+Boolean)

If true (default false unless URL ends with =.git=), assume the URL is a GIT repository.

Non-interactive installation can be established using the option interactive(false). It is adviced to install from a particular trusted URL instead of the plain pack name for unattented operation.

[det]pack_url_file(+URL, -File)

True if File is a unique id for the referenced pack and version. Normally, that is simply the base name, but GitHub archives destroy this picture. Needed by the pack manager.

[det]pack_rebuild(+Pack)

Rebuilt possible foreign components of Pack.

[det]pack_rebuild

Rebuild foreign components of all packages.

[nondet,multifile]environment(-Name, -Value)

Hook to define the environment for building packs. This Multifile hook extends the process environment for building foreign extensions. A value provided by this hook overrules defaults provided by def_environment/2. In addition to changing the environment, this may be used to pass additional values to the environment, as in:

prolog_pack:environment('USER', User) :-
    getenv('USER', User).

Name	is an atom denoting a valid variable name
Value	is either an atom or number representing the value of the variable.

[semidet]pack_upgrade(+Pack)

Try to upgrade the package Pack.

To be done

Update dependencies when updating a pack from git?

[det]pack_remove(+Name)

Remove the indicated package.

[nondet]pack_property(?Pack, ?Property)

True when Property is a property of an installed Pack. This interface is intended for programs that wish to interact with the package manager. Defined properties are:

directory(Directory)

Directory into which the package is installed

version(Version)

Installed version

title(Title)

Full title of the package

author(Author)

Registered author

download(URL)

Official download URL

readme(File)

Package README file (if present)

todo(File)

Package TODO file (if present)