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Buildout recipes for django development

Project description

© 2014 Thomas Khyn

Buildout recipes for django development

About

The recipes available in djangorecipebook are mostly derived from djangorecipe’s functionalities. However, while djangorecipe aims at generating all scripts in one part, djangorecipebook enables you to define one part per script (create, manage, wsgi, test, makemigrations), hence allowing the use of different settings and/or eggs for each part.

Through its automatic minimal settings generation, djangorecipebook is particularly adapted to reusable apps development, e.g. for testing or generating migrations with Django 1.7+, south or both.

djangorecipebook works with django 1.4 to 1.8 and relevant python versions (2.6 to 3.4, depending on django version).

Available recipes

djangorecipebook:manage

Creates a management script for the project

djangorecipebook:wsgi

Creates a wsgi script for the project

djangorecipebook:fcgi

Creates a fcgi script for the project

djangorecipebook:test

Creates a script that invokes manage.py test [apps].

djangorecipebook:makemigrations (new in v1.2)

Generates south and/or Django 1.7+ migrations

djangorecipebook:migrate (new in v1.2)

Invokes manage.py migrate [apps]. For the lazy ones.

djangorecipebook:create

Creates a django project from a user-defined template or using django’s startproject management command. This recipe will not generate any script. The name of the created project is the name of the section.

Options

Common options

project-dir

The directory where the project files lie, relative to the buildout.cfg directory.

Defaults to '.' (buildout directory).

settings

The settings module to load, imported from the project directory.

Defaults to 'settings' or a set of minimal settings, depending on the recipe.

extra-paths

Paths to add to sys.path in the generated script.

Defaults to [].

envvars

Any environment variable that need to be set for the test run, one per line, under the form VARIABLE = value (spaces are tolerated).

Defaults to no environment variable set.

initialization

Some (basic) python initialization code to insert in the generated script. Don’t forget that leading whitespaces are stripped.

Defaults to ''.

Manage options

settings

If a settings module is not provided, the settings will be a set of minimal parameters, with the added installed apps below.

Defaults to minimal settings.

inst_apps

The apps to add to the INSTALLED_APPS setting if no settings module is provided. This option should not be used when a settings module is provided.

Defaults to ''.

args

Any command-line argument you wish to have added to the generated script, separated by spaces or line-breaks.

Defaults to no arguments.

WSGI and FCGI options

settings

Must be a settings module, no default minimal settings are available for wsgi and fcgi recipes.

log-file

The path to a log file where all stdout and/or stderr data should be redirected to.

Defaults to '', which disables logging

log-level

The level to log errors for. Can be one of INFO (stdout + stderr) or ERROR (stderr only).

Defaults to INFO.

virtualenv

The virtualenv that should be used to run the wsgi/fcgi script. This requires virtualenv and virtualenvwrapper, as it relies upon the WORKON_HOME environment variable.

Defaults to '', which disables any virtual environment setup.

script_path

The desired output path of the script, as a path to a filename relative to the buildout directory (= where the buildout.cfg file lies).

Defaults to buildout’s bin directory with the recipe’s name.

application (wsgi only)

The path to a user-defined wsgi application.

Defaults to the result of django’s get_wsgi_application()

Test options

settings, inst_apps, args

See Manage options.

nose

Use this option if you are using nose (and therefore django_nose) to test your Django app or project. This will simply include django_nose and nose in your buildout.

Defaults to unset.

apps

The names of the apps that should be tested, separated by spaces or line-breaks. If using minimal settings, these apps will be added to the INSTALLED_APPS (in addition to those in the inst_apps option).

Defaults to '', all the apps in INSTALLED_APPS

Makemigrations options

settings, inst_apps, args

See Manage options.

apps

The names of the apps for which migrations should be generated, separated by spaces or line-breaks. If using minimal settings, these apps will be added to the INSTALLED_APPS (in addition to those in the inst_apps option).

Defaults to '', all the apps in INSTALLED_APPS

south

If this option has a value, south migrations will also be generated when using Django 1.7+ (behind the scenes, djangorecipebook installs django 1.6.x and south distributions and links them in a separate script that can be found in the parts/djangorecipeboook directory). This option has no effect with Django < 1.7, where south migrations will always be generated and south will always be installed if you are using this recipe.

Defaults to undefined (no south migrations generation).

The makemigrations recipe will generate:

  • Django 1.7+ migrations if you are using Django 1.7+

  • and/or south migrations if:
    • you are using Django 1.7+ and provide a value for the south option

    • or you are using Django < 1.7, whatever the value of the south option

When generating south migrations, the --initial flag can be provided when invoking the script from the command line. --initial has no effect whatsoever on Django 1.7+ migrations.

Additionally, djangorecipebook will detect the apps where south migrations must be initialised, and automatically add the --auto. That means you do not have to worry anymore about providing --auto or --initial flags.

If you are using Django 1.7+ and have south migrations in the app.migrations package, djangorecipebook will automatically rename this existing package to app.south_migrations and place the Django 1.7+ migrations in app.migrations. From south 1.0.0, south migrations placed in the south_migrations module are detected.

Migrate options

Same options as in Test options. The only difference is that you cannot use minimal settings (the default is 'settings') nor the inst_apps option. Indeed, migrations generally need a database to migrate!

Create options

In create mode, the following common options are unused:

  • extra-paths

  • initialization

The settings import path must be set as it is used to determine whether the project has already been created or not.

The following options are added:

template-dirs

The directories in which to search for user-defined project templates. This option may also be added in a [djangorecipebook] section (for example in the default.cfg file). See the Templates discovery section below.

Defaults to the built-in templates directory, containing default django project templates.

template

The template that should be used.

Defaults to the standard django project for the major version of django you are using.

secret

The SECRET_KEY to be used in the created settings file(s).

Defaults to a randomly generated alphanumeric key.

For more details on templating, see the Templates section below.

Templates

In create mode, a templating engine is available for greater personalisation of your django project initialization.

Templates discovery

If a template-dirs option is found either in the recipe section or in a specific djangorecipebook section, the recipe searches in these directories - from the last defined to the first - for a subdirectory name matching the template name provided.

If the search is unsuccessful or if none of template-dirs or template are defined, the recipe uses the default template for the major version of django being used.

For example, if in ~/.buildout/default.cfg you have the following lines:

[djangorecipebook]
template-dirs =
  /my/project/template/directory
  /my/project/template/directory2

And your buildout.cfg contains this section:

[mynewproject]
recipe = djangorecipebook:create
template-dirs = /my/other/template/dir
template = mytemplate

The recipe will search for a mytemplate directory in that order:

  1. /my/other/template/dir

  2. /my/project/template/directory2

  3. /my/project/template/directory

Template engine

The template engine is as simple as it can be and relies upon pythons’s string.Template. A variable can be inserted in any file or directory name or file content in template directory using the syntax ${variable}.

The following variables are available:

  • any user-defined recipe option from the configuration file

  • secret: the secret key for django settings

  • project_name: the project name (= the section name)

  • year: the current year

  • month: the current month

  • day: the current day of the month

For example, if you have in buildout.cfg:

[mynewproject]
recipe = djangorecipebook:create
template = mytemplate
author = Thomas Khyn

for a copyright notice in a module docstring, you may use:

(c) ${year} ${author}

which will produce to the following output in the final file (if we are in 2014):

(c) 2014 Thomas Khyn

or, if you have a directory named ${project_name}_parameters, the final name will be mynewproject_parameters.

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