diff options
Diffstat (limited to 'testing/mozharness/external_tools/virtualenv/docs/reference.rst')
| -rw-r--r-- | testing/mozharness/external_tools/virtualenv/docs/reference.rst | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/testing/mozharness/external_tools/virtualenv/docs/reference.rst b/testing/mozharness/external_tools/virtualenv/docs/reference.rst new file mode 100644 index 000000000..9249473c9 --- /dev/null +++ b/testing/mozharness/external_tools/virtualenv/docs/reference.rst @@ -0,0 +1,261 @@ +Reference Guide +=============== + +``virtualenv`` Command +---------------------- + +.. _usage: + +Usage +~~~~~ + +:command:`virtualenv [OPTIONS] ENV_DIR` + + Where ``ENV_DIR`` is an absolute or relative path to a directory to create + the virtual environment in. + +.. _options: + +Options +~~~~~~~ + +.. program: virtualenv + +.. option:: --version + + show program's version number and exit + +.. option:: -h, --help + + show this help message and exit + +.. option:: -v, --verbose + + Increase verbosity. + +.. option:: -q, --quiet + + Decrease verbosity. + +.. option:: -p PYTHON_EXE, --python=PYTHON_EXE + + The Python interpreter to use, e.g., + --python=python2.5 will use the python2.5 interpreter + to create the new environment. The default is the + interpreter that virtualenv was installed with + (like ``/usr/bin/python``) + +.. option:: --clear + + Clear out the non-root install and start from scratch. + +.. option:: --system-site-packages + + Give the virtual environment access to the global + site-packages. + +.. option:: --always-copy + + Always copy files rather than symlinking. + +.. option:: --relocatable + + Make an EXISTING virtualenv environment relocatable. + This fixes up scripts and makes all .pth files relative. + +.. option:: --unzip-setuptools + + Unzip Setuptools when installing it. + +.. option:: --no-setuptools + + Do not install setuptools in the new virtualenv. + +.. option:: --no-pip + + Do not install pip in the new virtualenv. + +.. option:: --no-wheel + + Do not install wheel in the new virtualenv. + +.. option:: --extra-search-dir=DIR + + Directory to look for setuptools/pip distributions in. + This option can be specified multiple times. + +.. option:: --prompt=PROMPT + + Provides an alternative prompt prefix for this + environment. + +.. option:: --download + + Download preinstalled packages from PyPI. + +.. option:: --no-download + + Do not download preinstalled packages from PyPI. + +.. option:: --no-site-packages + + DEPRECATED. Retained only for backward compatibility. + Not having access to global site-packages is now the + default behavior. + +.. option:: --distribute +.. option:: --setuptools + + Legacy; now have no effect. Before version 1.10 these could be used + to choose whether to install Distribute_ or Setuptools_ into the created + virtualenv. Distribute has now been merged into Setuptools, and the + latter is always installed. + +.. _Distribute: https://pypi.python.org/pypi/distribute +.. _Setuptools: https://pypi.python.org/pypi/setuptools + + +Configuration +------------- + +Environment Variables +~~~~~~~~~~~~~~~~~~~~~ + +Each command line option is automatically used to look for environment +variables with the name format ``VIRTUALENV_<UPPER_NAME>``. That means +the name of the command line options are capitalized and have dashes +(``'-'``) replaced with underscores (``'_'``). + +For example, to automatically use a custom Python binary instead of the +one virtualenv is run with you can also set an environment variable:: + + $ export VIRTUALENV_PYTHON=/opt/python-3.3/bin/python + $ virtualenv ENV + +It's the same as passing the option to virtualenv directly:: + + $ virtualenv --python=/opt/python-3.3/bin/python ENV + +This also works for appending command line options, like ``--find-links``. +Just leave an empty space between the passed values, e.g.:: + + $ export VIRTUALENV_EXTRA_SEARCH_DIR="/path/to/dists /path/to/other/dists" + $ virtualenv ENV + +is the same as calling:: + + $ virtualenv --extra-search-dir=/path/to/dists --extra-search-dir=/path/to/other/dists ENV + +.. envvar:: VIRTUAL_ENV_DISABLE_PROMPT + + Any virtualenv created when this is set to a non-empty value will not have + it's :ref:`activate` modify the shell prompt. + + +Configuration File +~~~~~~~~~~~~~~~~~~ + +virtualenv also looks for a standard ini config file. On Unix and Mac OS X +that's ``$HOME/.virtualenv/virtualenv.ini`` and on Windows, it's +``%APPDATA%\virtualenv\virtualenv.ini``. + +The names of the settings are derived from the long command line option, +e.g. the option :option:`--python <-p>` would look like this:: + + [virtualenv] + python = /opt/python-3.3/bin/python + +Appending options like :option:`--extra-search-dir` can be written on multiple +lines:: + + [virtualenv] + extra-search-dir = + /path/to/dists + /path/to/other/dists + +Please have a look at the output of :option:`--help <-h>` for a full list +of supported options. + + +Extending Virtualenv +-------------------- + + +Creating Your Own Bootstrap Scripts +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +While this creates an environment, it doesn't put anything into the +environment. Developers may find it useful to distribute a script +that sets up a particular environment, for example a script that +installs a particular web application. + +To create a script like this, call +:py:func:`virtualenv.create_bootstrap_script`, and write the +result to your new bootstrapping script. + +.. py:function:: create_bootstrap_script(extra_text) + + Creates a bootstrap script from ``extra_text``, which is like + this script but with extend_parser, adjust_options, and after_install hooks. + +This returns a string that (written to disk of course) can be used +as a bootstrap script with your own customizations. The script +will be the standard virtualenv.py script, with your extra text +added (your extra text should be Python code). + +If you include these functions, they will be called: + +.. py:function:: extend_parser(optparse_parser) + + You can add or remove options from the parser here. + +.. py:function:: adjust_options(options, args) + + You can change options here, or change the args (if you accept + different kinds of arguments, be sure you modify ``args`` so it is + only ``[DEST_DIR]``). + +.. py:function:: after_install(options, home_dir) + + After everything is installed, this function is called. This + is probably the function you are most likely to use. An + example would be:: + + def after_install(options, home_dir): + if sys.platform == 'win32': + bin = 'Scripts' + else: + bin = 'bin' + subprocess.call([join(home_dir, bin, 'easy_install'), + 'MyPackage']) + subprocess.call([join(home_dir, bin, 'my-package-script'), + 'setup', home_dir]) + + This example immediately installs a package, and runs a setup + script from that package. + +Bootstrap Example +~~~~~~~~~~~~~~~~~ + +Here's a more concrete example of how you could use this:: + + import virtualenv, textwrap + output = virtualenv.create_bootstrap_script(textwrap.dedent(""" + import os, subprocess + def after_install(options, home_dir): + etc = join(home_dir, 'etc') + if not os.path.exists(etc): + os.makedirs(etc) + subprocess.call([join(home_dir, 'bin', 'easy_install'), + 'BlogApplication']) + subprocess.call([join(home_dir, 'bin', 'paster'), + 'make-config', 'BlogApplication', + join(etc, 'blog.ini')]) + subprocess.call([join(home_dir, 'bin', 'paster'), + 'setup-app', join(etc, 'blog.ini')]) + """)) + f = open('blog-bootstrap.py', 'w').write(output) + +Another example is available `here`__. + +.. __: https://github.com/socialplanning/fassembler/blob/master/fassembler/create-venv-script.py |