.. -*- coding: utf-8 -*-

.. _SetUpEnv:

Installation and set-up of a *CubicWeb* environment

===================================================

Installation of `Cubicweb` and its dependencies

-----------------------------------------------

|cubicweb| is packaged for Debian and Ubuntu, but can be installed from source

using a tarball or the Mercurial version control system.

.. _DebianInstallation:

Debian and Ubuntu packages

```````````````````````````

Depending on the distribution you are using, add the appropriate line to your

list of sources (for example by editing ``/etc/apt/sources.list``).

For Debian Lenny::

  deb http://ftp.logilab.org/dists/ lenny/

For Debian Sid::

  deb http://ftp.logilab.org/dists/ sid/

For Ubuntu Hardy::

  deb http://ftp.logilab.org/dists/ hardy/

You can now install the required packages with the following command::

  apt-get update

  apt-get install cubicweb cubicweb-dev

`cubicweb` installs the framework itself, allowing you to create new instances.

`cubicweb-dev` installs the development environment allowing you to develop new

cubes.

There is also a wide variety of cubes listed on the `CubicWeb.org Forge`_

available as debian packages and tarball.

The repositories are signed with `Logilab's gnupg key`_. To avoid warning on

"apt-get update":

1. become root using sudo

2. download http://ftp.logilab.org/dists/logilab-dists-key.asc using e.g. wget

3. run "apt-key add logilab-dists-key.asc"

4. re-run apt-get update (manually or through the package manager, whichever you prefer)

.. _`Logilab's gnupg key`: http://ftp.logilab.org/dists/logilab-dists-key.asc

.. _`CubicWeb.org Forge`: http://www.cubicweb.org/project/

.. _PipInstallation:

Installation with pip

`````````````````````

|cubicweb| and its cubes have been pip_ installable since version 3.8. Search

for them on pypi_::

  pip install cubicweb

.. _pip: http://pypi.python.org/pypi/pip

.. _pypi: http://pypi.python.org/pypi?%3Aaction=search&term=cubicweb

.. _SourceInstallation:

.. warning::

  This method may still have hiccups. If it does not work for you,

  please consider installing from version control system

  (:ref:`MercurialInstallation`).

Install from source

```````````````````

You can download the archive containing the sources from our `ftp site`_ at::

  http://ftp.logilab.org/pub/cubicweb/

.. _`ftp site`: http://ftp.logilab.org/pub/cubicweb/

Make sure you also have all the :ref:`InstallDependencies`.

.. _MercurialInstallation:

Install from version control system

```````````````````````````````````

You can keep up to date with on-going development by using Mercurial::

  hg clone http://www.logilab.org/hg/forests/cubicweb

See :ref:`MercurialPresentation` for more details about Mercurial.

A practical way to get many of CubicWeb's dependencies and a nice set

of base cubes is to run the `clone_deps.py` script located in

`cubicweb/bin/`::

  python cubicweb/bin/clone_deps.py

(Windows users should replace slashes with antislashes).

This script will clone a set of mercurial repositories into in the

directory containing the CubicWeb repository, and update them to the

latest published version tag (if any).

When cloning a repository, you might be set in a development branch

(the 'default' branch). You should check that the branches of the

repositories are set to 'stable' (using `hg up stable` for each one)

if you do not intend to develop the framework itself.

Even better, `hg tags` will display a list of tags in reverse

chronological order. One reasonnable way to get to a working version

is to pick the latest published version (as done by the `clone_deps`

script). These look like `cubicweb-debian-version-3.9.7-1`. Typing::

 hg update cubicweb-debian-version-3.9.7-1

will update the repository files to this version.

Make sure you also have all the :ref:`InstallDependencies`.

.. _WindowsInstallation:

Windows installation

````````````````````

Your best option is probably the :ref:`PipInstallation`. If it does not work or

if you want more control over the process, continue with the following

instructions.

Base elements

~~~~~~~~~~~~~

Setting up a windows development environment is not too complicated but requires

a series of small steps. What is proposed there is only an example of what can be

done. We assume everything goes into `C:\\` in this document. Adjusting the

installation drive should be straightforward.

You should start by downloading and installing Python version >= 2.5 and < 3.

An alternative option would be installing the Python(x,y)

distribution. Python(x,y) is not a requirement, but it makes things easier for

Windows user by wrapping in a single installer python 2.5 plus numerous useful

third-party modules and applications (including Eclipse + pydev, which is an

arguably good IDE for Python under Windows). Download it from this page::

  http://code.google.com/p/pythonxy/wiki/Downloads

Then you must grab Twisted. There is a windows installer directly available from

this page::

  http://twistedmatrix.com/trac/

A windows installer for lxml will be found there::

  http://pypi.python.org/pypi/lxml/2.2.1

Check out the lxml-2.2.1-win32-py2.5.exe file. More recent bugfix

releases should probably work, too.

You should find postgresql 8.4 there::

  http://www.enterprisedb.com/products/pgdownload.do#windows

The python drivers for posgtresql are to be found there::

  http://www.stickpeople.com/projects/python/win-psycopg/#Version2

Please be careful to select the right python (2.5) and postgres (8.4) versions.

A windows compiled recent version of gettext::

  http://ftp.logilab.org/pub/gettext/gettext-0.17-win32-setup.exe

A pre-compiled version of rql for windows (take care of retrieving the

most recent version available there)::

  http://ftp.logilab.org/pub/rql/rql-0.23.0.win32-py2.5.exe

Pyro enables remote access to cubicweb repository instances. Get it there::

  http://sourceforge.net/projects/pyro/files/

To access LDAP/Active directory directories, we need the python-ldap

package. Windows binaries are available from::

  http://www.osuch.org/python-ldap

Check out the latest release.

Having graphviz will allow schema drawings, which is quite recommended (albeit

not mandatory). You should get an msi installer there::

  http://www.graphviz.org/Download_windows.php

Simplejson is needed when installing with Python 2.5, but included in the

standard library for Python >= 2.6. Get it from there::

  http://www.osuch.org/python-simplejson%3Awin32

Make sure you also have all the :ref:`InstallDependencies` that are not specific

to Windows.

Tools

~~~~~

Get mercurial + its standard windows GUI (TortoiseHG) there (the latest is the

greatest)::

  http://bitbucket.org/tortoisehg/stable/wiki/download

If you need to peruse mercurial over ssh, it can be helpful to get an ssh client

like Putty::

  http://www.putty.org/

Integration of mercurial and Eclipse is convenient enough that we want

it. Instructions are set there, in the `Download & Install` section::

  http://www.vectrace.com/mercurialeclipse/

Getting the sources

~~~~~~~~~~~~~~~~~~~

You can either download the latest release (see

:ref:`SourceInstallation`) or get the development version using

Mercurial (see :ref:`MercurialInstallation` and below), which is more

convenient.

Environment variables

~~~~~~~~~~~~~~~~~~~~~

You will need some convenience environment variables once all is set up. These

variables are settable through the GUI by getting at the 'System properties'

window (by righ-clicking on 'My Computer' -> properties).

In the 'advanced' tab, there is an 'Environment variables' button. Click on

it. That opens a small window allowing edition of user-related and system-wide

variables.

We will consider only user variables. First, the PATH variable. You should ensure

it contains, separated by semi-colons, and assuming you are logged in as user

Jane::

  C:\Documents and Settings\Jane\My Documents\Python\cubicweb\cubicweb\bin

  C:\Program Files\Graphviz2.24\bin

The PYTHONPATH variable should also contain::

  C:\Documents and Settings\Jane\My Documents\Python\cubicweb\

From now, on a fresh `cmd` shell, you should be able to type::

  cubicweb-ctl list

... and get a meaningful output.

Running an instance as a service

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This currently assumes that the instances configurations is located at

C:\\etc\\cubicweb.d.

For a cube 'my_instance', you will then find

C:\\etc\\cubicweb.d\\my_instance\\win32svc.py that has to be used as follows::

  win32svc install

This should just register your instance as a windows service. A simple::

  net start cubicweb-my_instance

should start the service.

Other dependencies

``````````````````

You can also install:

* `pyro` if you wish the repository to be accessible through Pyro

  or if the client and the server are not running on the same machine

  (in which case the packages will have to be installed on both

  machines)

* `python-ldap` if you plan to use a LDAP source on the server

.. _DatabaseInstallation:

Databases configuration

-----------------------

Each instance can be configured with its own database connection information,

that will be stored in the instance's :file:`sources` file. The database to use

will be chosen when creating the instance. Currently cubicweb has been tested

using Postgresql (recommended), MySQL, SQLServer and SQLite.

Other possible sources of data include CubicWeb, Subversion, LDAP and Mercurial,

but at least one relational database is required for CubicWeb to work. You do

not need to install a backend that you do not intend to use for one of your

instances. SQLite is not fit for production use, but it works well for testing

and ships with Python, which saves installation time when you want to get

started quickly.

.. _PostgresqlConfiguration:

PostgreSQL configuration

````````````````````````

For installation, please refer to the `PostgreSQL project online documentation`_.

.. _`PostgreSQL project online documentation`: http://www.postgresql.org/

You need to install the three following packages: `postgresql-8.X`,

`postgresql-client-8.X`, and `postgresql-plpython-8.X`. If you run postgres

version prior to 8.3, you'll also need the `postgresql-contrib-8.X` package for

full-text search extension.

If you run postgres on another host than the |cubicweb| repository, you should

install the `postgresql-client` package on the |cubicweb| host, and others on the

database host.

.. Note::

    If you already have an existing cluster and PostgreSQL server running, you do

    not need to execute the initilization step of your PostgreSQL database unless

    you want a specific cluster for |cubicweb| databases or if your existing

    cluster doesn't use the UTF8 encoding (see note below).

* First, initialize a PostgreSQL cluster with the command ``initdb``.

  ::

    $ initdb -E UTF8 -D /path/to/pgsql

  Notice the encoding specification. This is necessary since |cubicweb| usually

  want UTF8 encoded database. If you use a cluster with the wrong encoding, you'll

  get error like::

    new encoding (UTF8) is incompatible with the encoding of the template database (SQL_ASCII)

    HINT:  Use the same encoding as in the template database, or use template0 as template.

  Once initialized, start the database server PostgreSQL with the command::

    $ postgres -D /path/to/psql

  If you cannot execute this command due to permission issues, please make sure

  that your username has write access on the database.  ::

    $ chown username /path/to/pgsql

* The database authentication can be either set to `ident sameuser` or `md5`.  If

  set to `md5`, make sure to use an existing user of your database.  If set to

  `ident sameuser`, make sure that your client's operating system user name has a

  matching user in the database. If not, please do as follow to create a user::

    $ su

    $ su - postgres

    $ createuser -s -P username

  The option `-P` (for password prompt), will encrypt the password with the

  method set in the configuration file :file:`pg_hba.conf`.  If you do not use this

  option `-P`, then the default value will be null and you will need to set it

  with::

    $ su postgres -c "echo ALTER USER username WITH PASSWORD 'userpasswd' | psql"

.. Note::

    The authentication method can be configured in file:`pg_hba.conf`.

The above login/password will be requested when you will create an instance with

`cubicweb-ctl create` to initialize the database of your instance.

Notice that the `cubicweb-ctl db-create` does database initialization that

may requires a postgres superuser. That's why a login/password is explicitly asked

at this step, so you can use there a superuser without using this user when running

the instance. Things that require special privileges at this step:

* database creation, require the 'create database' permission

* install the plpython extension language (require superuser)

* install the tsearch extension for postgres version prior to 8.3 (require superuser)

To avoid using a super user each time you create an install, a nice trick is to

install plpython (and tsearch when needed) on the special `template1` database,

so they will be installed automatically when cubicweb databases are created

without even with needs for special access rights. To do so, run ::

  # Installation of plpythonu language by default ::

  $ createlang -U pgadmin plpythonu template1

  $ psql -U pgadmin template1

  template1=# update pg_language set lanpltrusted=TRUE where lanname='plpythonu';

Where `pgadmin` is a postgres superuser. The last command is necessary since by

default plpython is an 'untrusted' language and as such can't be used by non

superuser. This update fix that problem by making it trusted.

To install the tsearch plain-text index extension on postgres prior to 8.3, run::

    cat /usr/share/postgresql/8.X/contrib/tsearch2.sql | psql -U username template1

.. _MySqlConfiguration:

MySql configuration

```````````````````

Yout must add the following lines in ``/etc/mysql/my.cnf`` file::

    transaction-isolation=READ-COMMITTED

    default-storage-engine=INNODB

    default-character-set=utf8

    max_allowed_packet = 128M

.. Note::

    It is unclear whether mysql supports indexed string of arbitrary length or

    not.

.. _SQLServerConfiguration:

SQLServer configuration

```````````````````````

As of this writing, support for SQLServer 2005 is functional but incomplete. You

should be able to connect, create a database and go quite far, but some of the

SQL generated from RQL queries is still currently not accepted by the

backend. Porting to SQLServer 2008 is also an item on the backlog.

The `source` configuration file may look like this (specific parts only are

shown)::

  [system]

  db-driver=sqlserver2005

  db-user=someuser

  # database password not needed

  #db-password=toto123

  #db-create/init may ask for a pwd: just say anything

  db-extra-arguments=Trusted_Connection

  db-encoding=utf8

.. _SQLiteConfiguration:

SQLite configuration

````````````````````

SQLite has the great advantage of requiring almost no configuration. Simply

use 'sqlite' as db-driver, and set path to the dabase as db-name. Don't specify

anything for db-user and db-password, they will be ignore anyway.

.. Note::

  SQLite is great for testing and to play with cubicweb but is not suited for

  production environments.

.. _PyroConfiguration: