doc/book/en/C011-bis-installation.en.txt
author Sandrine Ribeau <sandrine.ribeau@logilab.fr>
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.. -*- coding: utf-8 -*-
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.. _installationGAE:
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Installation de `CubicWeb` pour GoogleAppEngine
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===============================================
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Qu'est-ce que `LAX` ?
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=======================
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`LAX` (Logilab Appengine eXtension) est un framework d'application
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web basé sur `Google AppEngine`.
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`LAX` est un portage de la partie web de la plate-forme applicative
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développée par Logilab depuis 2001.  Cette plate-forme publie des
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données tirées de bases SQL, d'annuaires LDAP et de systèmes de
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gestion de version. En avril 2008, elle a été portée pour fonctionner
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sur le "datastore" de `Google AppEngine`.
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XXX: faire un parallèle entre Django/GAE et LAX/GAE
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Téléchargement des sources
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==========================
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- Les sources de `Google AppEngine` peuvent être récupérées à l'adresse
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  suivante : http://code.google.com/appengine/downloads.html
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- Les sources de `LAX` se trouvent à l'adresse suivante :
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  http://lax.logilab.org/
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Installation
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============
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Une fois décompactée, l'archive `lax-0.1.0-alpha.tar.gz`, on obtient
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l'arborescence suivante::
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  .
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  |-- app.yaml
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  |-- custom.py
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  |-- data
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  |-- ginco/
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  |-- i18n/
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  |-- logilab/
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  |-- main.py
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  |-- mx/
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  |-- rql/
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  |-- schema.py
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  |-- simplejson/
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  |-- tools/
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  |   |-- generate_schema_img.py
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  |   `-- i18ncompile.py
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  |-- views.py
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  |-- yams/
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  `-- yapps/
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On retrouve le squelette d'une application web de `Google AppEngine`
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(fichiers ``app.yaml``, ``main.py`` en particulier) avec les dépendances
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supplémentaires nécessaires à l'utilisation du framework `LAX`
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Lancement de l'application de base
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==================================
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Plusieurs répertoires doivent être accessibles via la variable 
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d'environnement ``PYTHONPATH`` ::
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  $ export PYTHONPATH=/path/to/google_appengine:/path/to/google_appengine/lib/yaml/lib:/path/to/myapp/
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Le répertoire yaml n'est nécessaire que pour le lancement des scripts
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qui se trouvent dans lax/tools et pour l'exécution des tests unitaires.
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Pour démarrer::
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  $ python /path/to/google_appengine/dev_appserver.py /path/to/lax
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