Ubuntu Manpage: fades - A system that automatically handles the virtualenvs in the cases normally found

NAME

       fades  -  A  system that automatically handles the virtualenvs in the cases normally found
       when writing scripts and simple programs, and even helps to administer big projects.

SYNOPSYS

       fades   [-h][--help]   [-V][--version]   [-v][--verbose]   [-q][--quiet]   [-i][--ipython]
       [-d][--dependency]   [-r][--requirement]   [-x][--exec]   [-p   version][--python=version]
       [--rm=uuid]      [--system-site-packages]      [--virtualenv-options=options]      [--pip-
       options=options] [--check-updates] [child_program [child_options]]

       fades  can  be  used to execute directly your script, or put it with a #! at your script's
       beginning.

DESCRIPTION

       fades will automagically create a new  virtualenv  (or  reuse  a  previous  created  one),
       installing  the  necessary  dependencies,  and execute your script inside that virtualenv,
       with the only requirement of executing the script with fades and also marking the required
       dependencies.

       The  first  non-option  parameter (if any) would be then the child program to execute, and
       any other parameters after that are passed as is to that child script.

       fades can also be executed without passing a child script to execute: in this mode it will
       open  a  Python  interactive  interpreter  inside  the  created/reused  virtualenv (taking
       dependencies from --dependency or --requirement options).

OPTIONS

-h, --help
Show help about all the parameters and options, and quit.

-V, --version
Show the program version and info about the system, and quit.

-v, --verbose
Send all internal debugging lines to stderr, which may be very useful if any
problem arises.

-q, --quiet
Don't show anything (unless it has a real problem), so the original script stderr
is not polluted at all.

-i, --ipython
Runs IPython shell instead of python ones.

-d, --dependency
Specify dependencies through command line. This option can be specified multiple
times (once per dependency), and each time the format is repository::dependency.
The dependency may have versions specifications, and the repository is optional
(defaults to 'pypi'). Examples:

requests
pypi::requests > 2.3
requests<=3

See more examples below for real command line usage explanations.

-r, --requirement
Read the dependencies from a file. Format in each line is the same than
dependencies specified with --dependency.

-p version, --python=version
Select which Python version to be used; the argument can be just the number (2.7),
the whole name (python2.7) or the whole path (/usr/bin/python2.7). Of course, the
corresponding version of Python needs to be installed in your system.

The dependencies can be indicated in multiple places (in the Python source file,
with a comment besides the import, in a requirementsfile, and/or through command
line. In case of multiple definitions of the same dependency, command line
overrides everything else, and requirements file overrides what is specified in the
source code.

-x, --exec
Execute the child_program inside the virtualenv.

The child_program must be found in the virtualenv's bin directory.

--rm uuid
Remove a virtualenv by uuid.

--system-site-packages
Give the virtual environment access to thesystem site-packages dir

--virtualenv-options=VIRTUALENV_OPTION
Extra options to be supplied to virtualenv. (this option can beused multiple times)

--pip-options=PIP_OPTION
Extra options to be supplied to pip. (this option can beused multiple times)

--check-updates
Will check for updates in PyPI to verify if there are new versions for the
requested dependencies. If a new version is available for a dependency, it will use
it (if the dependency was requested without version) or just inform which new
version is available (if the dependency was requested with a specific version).

EXAMPLES

       fades foo.py --bar

              Executes foo.py under fades, passing the --bar parameter to the child program, in a
              virtualenv with the dependencies indicated in the source code.

       fades -v foo.py

              Executes foo.py under fades, showing all the fades messages (verbose mode).

       fades -d dependency1 -d dependency2>3.2 foo.py --bar

              Executes foo.py under fades (passing the --bar parameter to it),  in  a  virtualenv
              with  the  dependencies  indicated  in  the  source  code  and also dependency1 and
              dependency2 (any version > 3.2).

       fades -d dependency1

              Executes the Python  interactive  interpreter  in  a  virtualenv  with  dependency1
              installed.

       fades -r requirements.txt

              Executes  the Python interactive interpreter in a virtualenv after installing there
              all dependencies taken from the requirements.txt file.

USING CONFIGURATION FILES

       You can also configure fades using .ini config files. fades will search  config  files  in
       /etc/fades/fades.ini,   the   path   indicated   by  xdg  for  your  system  (for  example
       ~/config/fades/fades.ini) and .fades.ini.  So you can have different settings  at  system,
       user and project level.

       The  config  files  are in .ini format. (configparser) and fades will search for a [fades]
       section.  You have to use the same configurations that in the CLI. The only difference  is
       with the config options with a dash, it has to be replaced with a underscore.

       Check     http://fades.readthedocs.org/en/latest/readme.html#setting-options-using-config-
       files for full examples.

AUTHORS

       Facundo Batista, Nicolás Demarchi (see development page for contact info).

LICENSING

       This program is free software: you can redistribute it and/or modify it under the terms of
       the GNU General Public License version 3, as published by the Free Software Foundation.

                                                                                         FADES(1)