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Predicate pack_install/1
Availability::- use_module(library(prolog_pack)).(can be autoloaded)
Source[det]pack_install(+Spec:atom)
Install a package. Spec is one of

  • A package name. This queries the package repository at http://www.swi-prolog.org
  • 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
  • '.', in which case a relative symlink is created to the current directory (all other options for Spec make a copy of the files).

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

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Kaitain Jones said (2016-11-30T20:31:21):0 upvotes 0 0 downvotes
Picture of user Kaitain Jones.

Peak, are you using a version of SWIPL built from source? If so, it is probable that you have a dependency missing on your system, specifically libarchive-devel. (Possibly libarchive-dev on some distros?)

On my system, what I had to do was:

sudo yum install libarchive-devel

If that all goes well, go to your swipl-devel source repo from which you built your current version of SWI, and then rebuild the thing:

make distclean

./prepare

./build

Now when you run SWI, call check_installation.

...to check that archive is present this time. It ought to be if everything has gone well.

If it's there, pack_install/1 now ought to work correctly.

Jan Wielemaker said (2014-03-17T10:22:03):0 upvotes 0 0 downvotes
Picture of user Jan Wielemaker.
pack_install/1 requires the archive package installed. For downloading, it also requires package http and -if the data is on an https server- the package ssl.
peak said (2014-03-13T09:22:37):0 upvotes 0 0 downvotes
Picture of user peak.

https://github.com/mndrix/regex (for example) says to use pack_install(regex), but:

?- pack_install(regex).

Contacting server at http://www.swi-prolog.org/pack/query ... ok

Install regex@0.2.4 from http://packs.ndrix.com/regex/regex-0.2.4.tgz Y/n?

Create directory for packages

(1) * /Users/xyzzy/lib/swipl/pack

(2) /usr/local/Cellar/swi-prolog/6.6.1/libexec/lib/swipl-6.6.1/pack

(3) Cancel

Your choice? 2

ERROR: library `archive' does not exist

Exception: (10) prolog_pack:pack_archive_info('/usr/local/Cellar/swi-prolog/6.6.1/libexec/lib/swipl-6.6.1/pack/Downloads/regex-0.2.4.tgz', regex, _G4422, _G4423) ?

? indeed.