Clom is a Python Command Line Object Mapper. It's intended to make generating commands and escaping arguments easier for command line interaction. It's particularly useful when used with Fabric or subprocess.

• Documentation
• Clom on GitHub
• Clom on Pypi

Installation

Install with pip or easy_install.

pip install clom

Usage Examples

Import:

>>> from clom import clom

Build a command:

>>> clom.echo("Don't test me")
"echo 'Don'\\''t test me'"

Augment with arguments:

>>> clom.ls.with_opts('-a', '-t', l=True).with_args('~/')
"ls -a -t -l '~/'"
>>> clom.curl('http://dev.host', X='POST', data='message=hello')
'curl -X POST --data=message=hello http://dev.host'

Use sub commands:

>>> clom.git.checkout('mybranch')
'git checkout mybranch'

Execute with ease:

>>> clom.seq(5).shell.all()
['1', '2', '3', '4', '5']

>>> clom.seq.shell('5').first()
'1'

Iterate over results:

>>> for i in clom.seq(3).shell():
... print(i)
... 
1
2
3

Handle errors:

>>> clom.touch('/not/a/thing').shell()      # doctest:+IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
      ...
    CommandError: Error while executing "touch /not/a/thing" (1):
touch: cannot touch ‘/not/a/thing’: No such file or directory

Group commands:

>>> from clom import AND, OR
>>> OR(clom.vagrant.up, clom.echo('Vagrant up failed'))
"( vagrant up || echo 'Vagrant up failed' )"
>>> OR(clom.vagrant.up, clom.echo('Vagrant up failed')).shell()
<CommandResult return_code=0, stdout=18 bytes, stderr=... bytes>
>>> print(OR(clom.false, clom.echo('Vagrant up failed')).shell())
Vagrant up failed

Re-use commands:

>>> echo = clom.echo
>>> echo.one.two
'echo one two'
>>> echo.three.four.shell.all()
['three four']
>>> echo.foo.bar.shell.all()
['foo bar']

Background tasks:

>>> clom.VBoxHeadless.with_opts(startvm="Windows Base").background()
"nohup VBoxHeadless --startvm='Windows Base' &> /dev/null &"
>>> clom.VBoxHeadless.with_opts(startvm="Windows Base").background().shell()
<CommandResult return_code=0, stdout=0 bytes, stderr=0 bytes>

Works great with fabric:

>>> from fabric.api import run, local       # doctest: +SKIP
>>> local(clom.ls)              # doctest: +SKIP
[localhost] local: ls
clom        clom.egg-info   docs        nohup.out   tests
''

Can even create fab commands:

>>> clom.fab.test('doctest', 'unit').deploy('dev')
'fab test:doctest,unit deploy:dev'
>>> clom.fab.with_opts('-a', hosts='dev.host').deploy.with_args('dev','test')
'fab -a --hosts=dev.host deploy:dev,test'

See more examples and the API in the Clom Documentation

Running Tests

Test are run using pytest:

pip install pytest

./runtests -v