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A basic collection of simple functions for installing and removing GAP packages,with the eventual aim of becoming a full package manager for the GAP system.

Example invocations:

gap> LoadPackage("PackageManager");gap> InstallPackage("digraphs");gap> InstallPackage("https://github.com/gap-packages/Semigroups.git");gap> InstallPackage("https://www.gap-system.org/pub/gap/gap4/tar.gz/packages/mapclass-1.2.tar.gz");gap> RemovePackage("semigroups");

By default, verbose information about a command's progress is printed to thescreen. To see less of this information, try using:

gap> SetInfoLevel(InfoPackageManager, 1);

For more information on the features of PackageManager, see the documentation athttps://gap-packages.github.io/PackageManager/doc/chap1.htmlor enter GAP and call, for example,

gap> ?InstallPackage

It should be possible to install GAP from source, and install all requiredpackages, using nothing but GAP and PackageManager. The following instructionsattempt to install GAP in your home directory~, with the package manager in a~/.gap/pkg directory. This should work on a Debian/Ubuntu machine, but mightneed some alterations on a Mac.

First, make sure you've got the required dependencies for GAP installed on yourcomputer. On a Debian/Ubuntu machine you can get the required software using:

sudo apt install autoconf build-essential curl git graphviz libtool libgmp-dev texlive-full

On a Mac, you can get the required software by installing Homebrew, and running:

brew install git autoconf automake curl GMP graphviz libtool

Now, to install GAP and PackageManager, open a terminal window and enter the following:

cd~git clone git@github.com:gap-system/gap.gitcd gap./autogen.sh./configuremakecd~/mkdir .gapcd .gapmkdir pkgcd pkggit clone git@github.com:gap-packages/PackageManager.gitcd~/gap./gap --bare

In the GAP window that opens, enter the following:

LoadPackage("PackageManager");InstallRequiredPackages();quit;

Now compile the documentation using:

make doc

You should now be able to load GAP with./gap and everything should worknormally. Further required packages can be installed withInstallPackage whenyou need them.

Please cite this package using the following format:

[YouXX]M. Young,PackageManager (GAP package),Easily download and install GAP packages,Version X.Y.Z (20XX),https://github.com/gap-packages/PackageManager.

	PackageManager was partly created with funding from the OpenDreamKit project:https://opendreamkit.org
	This infrastructure is part of a project that has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 676541.