Hi Francis,

Le 16 juil. 2020 �� 16:43, Francis via Pharo-users <pharo-users@lists.pharo.org> a ��crit :


De: Francis <falzonidavide@libero.it>
Objet: Metacello, Github and Cryptography
Date: 16 juillet 2020 �� 16:43:34 UTC+2
��: pharo-users@lists.pharo.org


Hi Guys,

I'm looking for a guide on how to load a project from github but I can't
find anything.
Specifically I want to load the Cryptography package. Udo, told me it is on
https://github.com/pharo-contributions/Cryptography, so I went to
https://github.com/pharo-contributions/Cryptography but there is no
documentation on how to load it.

Then after some attempts, I evaluated this code:

Metacello new
 baseline: 'Cryptography';
 repository: 'github://pharo-contributions/Cryptography';
 load.

Yes, you usually load a project like this.

and it works, but I can't figure out where is the usage of Metacello with
Github

Metacello allows to define the dependencies of a project. 
If Cryptography relies on other projects (hosted on GitHub or somewhere else), then Metacello will load these dependencies so you end with all needed packages to get the  project (in this case Cryptography) fully working. If you load the project directly with iceberg (not using the iceberg metacello plugin), you will miss project dependencies and the code will not be runnable.
If a project has no dependency, Metacello still allows to define dependencies of packages inside your project to load them in the right order.
More information on Metacello: http://files.pharo.org/books-pdfs/deep-into-pharo/2013-DeepIntoPharo-EN.pdf (chapter Managing projects with Metacello), https://github.com/Metacello/metacello/blob/master/docs/MetacelloUserGuide.md and https://github.com/Metacello/metacello/blob/master/docs/GettingStartedWithGitHub.md

Regards,
Christophe.