xontrib-dalias 0.0.8

Library of decorator aliases for the xonsh shell.

Library of decorator aliases (daliases) for the xonsh shell.

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Installation

To install use pip:

xpip install xontrib-dalias
# or
xpip install 'xontrib-dalias[dict,yaml]'  # With extra decorators.

Load:

xontrib load dalias

Usage

Transform output to object

Decorators:

• Default:
  • @lines - return list of lines.
  • @json - json to Python dict.
  • @path - string to pathlib.Path.
  • @parts - split by whitespaces using xonsh lexer. It's the same as builtin @$() operator.
• Extra (xpip install 'xontrib-dalias[dict,yaml]'):
  • @dict - dict-like object (json, JavaScript object, Python dict) to Python dict.
  • @yaml - YAML to Python dict.

Examples

$(@lines ls /)
# ['/bin', '/etc', '/home']

$(@json echo '{"a":1}')  # Try with `curl` ;)
# dict({"a":1})

docker inspect @($(@json docker ps --format json)['ID'])
# Container info


$(@path which -s xonsh)
# Path('/path/to/xonsh')

$(@path which -s xonsh).parent
# Path('/path/to')

$(@path echo '/tmp1\n/tmp2')
# [Path('/tmp1'), Path('/tmp2')]

$(@path echo ' ')  # Safe
# None

$(@path echo ' \n\n/tmp1')  # Safe
# [Path('/tmp1')]


aliases['ydig'] = '@yaml dig +yaml'  # Update `dig` via `brew install bind` to have `+yaml`.
y = $(ydig google.com)
y[0]['type']
# 'MESSAGE'

Piping into decorated alias to get object:

$(echo '{"a":1}' | @json cat)
# dict({"a":1})

aliases['@j'] = '@json cat'
$(echo '{"a":1}' | @j)
# dict({"a":1})

Error handling

Default decorators:

• @err - set $RAISE_SUBPROC_ERROR=True for the command.
• @noerr - set $RAISE_SUBPROC_ERROR=False for the command.

Examples:

$RAISE_SUBPROC_ERROR = True  # General environment.
if ![@noerr ls nononofile]:  # Do not raise exception in case of error.
    echo file 

Credits

This package was created with xontrib template.