Metadata-Version: 1.1
Name: pypsi
Version: 1.1.1
Summary: Python Pluggable Shell Interface
Home-page: https://github.com/ameily/pypsi
Author: Adam Meily
Author-email: meily.adam@gmail.com
License: BSD 3-Clause
Download-URL: https://pypi.python.org/pypi/pypsi
Description: Overview
        ========
        
        Python Pluggable Shell Interface, or pypsi, is a framework for developing
        command line based shell interfaces, akin to bash or csh. It is intended to be
        a replacement for the builtin Python ``cmd`` module. A ``cmd`` plugin is
        available for use to make the transition from ``cmd``-based shells to Pypsi.
        
        Pypsi is targetted towards both rapid prototype interfaces and large stable
        shells. The bootstraping code is very small with very little boilerplate. Pypsi
        ships with a great deal of capabilities out of the box, all of which can be used
        or ignored. Pypsi is pluggable which allows commands, features, and plugins to be
        developed independently in their own source files and/or Python classes. This
        results in a very clean source repository. The actual code to setup and run the
        shell is exetremely small, on the order of ~20-50 lines of code.
        
        Pypsi, at its core, is pluggable. There are many hooks that allow plugin authors
        to extend and modify the core behavior of pypsi. Commands are isolated classes
        that make distribution, sharing, and modification easy.
        
        Caveats
        -------
        
        The only major caveat when using pypsi is that it only supports Python 3. Python
        3 is the future.
        
        Releases
        --------
        
        The pypsi source code is hosted at `GitHub <https://github.com/ameily/pypsi>`_
        and releases are stored at `PyPI <https://pypi.python.org/pypi/pypsi>`_. The
        latest version can also be install via pip:
        
        ::
        
            pip install pypsi
        
        Documentation can be found on `GitHub Pages <http://ameily.github.io/pypsi>`_,
        `Python Hosted <http://pythonhosted.org/pypsi/>`_, and on
        `Read the Docs <http://pypsi.readthedocs.org/en/latest/>`_.
        
        
        Features
        --------
        
        The following capabilities ship with pypsi and are available out of the box.
        
        -  I/O redirection
        -  String-based pipes
        -  Flexible API
        -  Tab completion
        -  Multiplatform
        -  Minimal dependencies
        -  Colors
        -  Session tips and message of the day (MOTD)
        -  Automated help, usage messages, and argument parsing
        -  Word wrapping
        -  Term highlighting (grep)
        -  Tables
        -  Prompt wizards
        -  ``cmd`` plugin to migrate existing ``cmd`` commands into pypsi
        
        Demo
        ----
        
        The ``demo.py`` source file can be run to show off some of the base commands and
        features that ship with pypsi (the ``demo.py`` file can be downloaded from the
        git repo at https://github.com/ameily/pypsi/blob/master/demo.py). The commands
        displayed below are all optional: pypsi does not require the use of any command
        or plugin.
        
        Variables
        ~~~~~~~~~
        
        ::
        
            pypsi)> var name = "Paul"
            pypsi)> var house = "Atredis"
            pypsi)> echo My name is $name, and I belong to House $house
            My name is Paul, and I belong to House Atredis
            pypsi)> var -l
            name     Paul
            house    Atredis
            pypsi)> var -d name
            pypsi)> echo $name
        
            pypsi)> var name = "Paul $house"
            pypsi)> echo $name
            Paul Atredis
        
        I/O redirection
        ~~~~~~~~~~~~~~~
        
        ::
        
            pypsi)> echo Hello
            Hello
            pypsi)> echo Hello > output.txt
            pypsi)> echo Goodbye
            pypsi)> xargs -I{} "echo line: {}" < output.txt
            line: Hello
            line: Goodbye
            pypsi)> cat output.txt | grep ll
            Hello
        
        System commands
        ~~~~~~~~~~~~~~~
        
        Allows execution of external applications. Command mimics Python's
        ``os.system()`` function.
        
        ::
        
            pypsi)> ls
            pypsi: ls: command not found
            pypsi)> system ls
            include/
            src/
            README.md
            pypsi)> system ls | system grep md
            README.md
        
        Fallback command
        ~~~~~~~~~~~~~~~~
        
        Allows the developer to set which command gets called if one does not exist in
        the current shell. This is very useful, for example, if you want to fallback on
        any OS installed executables. In this example, the fallback command is
        ``system``.
        
        ::
        
            pypsi)> ls
            include/
            src/
            README.md
        
        Command chaining
        ~~~~~~~~~~~~~~~~
        
        ::
        
            pypsi)> echo Hello && echo --bad-arg && echo goodbye
            Hello
            echo: unrecgonized arguments: --bad-arg
            pypsi)> echo Hello ; echo --bad-arg ; echo goodbye
            Hello
            echo: unrecgonized arguments: --bad-arg
            goodbye
            pypsi)> echo --bad-arg || echo first failed
            echo: unrecgonized arguments: --bad-arg
            first failed
        
        Multiline commands
        ~~~~~~~~~~~~~~~~~~
        
        ::
        
            pypsi)> echo Hello, \
            > Dave
            Hello, Dave
            pypsi)> echo This \
            > is \
            > pypsi \
            > and it rocks
            This is pypsi and it rocks
        
        Macros
        ~~~~~~
        
        Macros are analogous to functions in bash. They provide the ability to create
        new commands in the shell.
        
        ::
        
            pypsi)> macro hello
            > echo Hello, $1
            > echo Goodbye from macro $0
            > end
            pypsi)> hello Adam
            Hello, Adam
            Goodbye from macro hello
        
        Background
        ----------
        
        I developed Pypsi while working on a commerical product with a command line
        interface. Originally, we used the ``cmd`` module, which was fine when we only
        had a few commands that didn't accept complex arguments. As we added more
        commands and more features, maintainability and extensibility became extremely
        complicated and time consuming.
        
        I took what I had learned from the ``cmd`` module, ORM libraries such as
        MongoEngine, and features from proven great command line interfaces such as Git
        and then I developed Pypsi. In order for Pypsi to be viable for our project, I
        knew that Pypsi had to be compatible with ``cmd``, the porting process had to
        take as little time as possible, and it had to be easy to understand and
        maintain.
        
        The porting process from ``cmd`` to Pypsi for our commerical project took place
        in January 2014. Since then, we've had 4 stable releases, had real world
        feedback, and have successfully created many Pypsi commands and plugins with
        ease.
        
        License
        -------
        
        ``pypsi`` is released under the BSD 3-Clause license.
        
Keywords: cli,command line,command line interface,shell,terminal,console,term,command prompt
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Environment :: Console
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: BSD License
Classifier: Natural Language :: English
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Topic :: Software Development :: User Interfaces
Classifier: Topic :: Software Development :: Libraries :: Application Frameworks
Classifier: Topic :: Terminals
