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Pythonic task execution

Project description

To find out what’s new in this version of Invoke, please see the changelog.

Invoke is a Python (2.7 and 3.4+) task execution tool & library, drawing inspiration from various sources to arrive at a powerful & clean feature set.

  • Like Ruby’s Rake tool and Invoke’s own predecessor Fabric 1.x, it provides a clean, high level API for running shell commands and defining/organizing task functions from a tasks.py file:

    from invoke import task
    
    @task
    def clean(ctx, docs=False, bytecode=False, extra=''):
        patterns = ['build']
        if docs:
            patterns.append('docs/_build')
        if bytecode:
            patterns.append('**/*.pyc')
        if extra:
            patterns.append(extra)
        for pattern in patterns:
            ctx.run("rm -rf {}".format(pattern))
    
    @task
    def build(ctx, docs=False):
        ctx.run("python setup.py build")
        if docs:
            ctx.run("sphinx-build docs docs/_build")
    
  • From GNU Make, it inherits an emphasis on minimal boilerplate for common patterns and the ability to run multiple tasks in a single invocation:

    $ invoke clean build
    
  • Where Fabric 1.x considered the command-line approach the default mode of use, Invoke (and tools built on it) are equally at home embedded in your own Python code or a REPL:

    >>> from invoke import run
    >>> cmd = "pip install -r requirements.txt"
    >>> result = run(cmd, hide=True, warn=True)
    >>> print(result.ok)
    True
    >>> print(result.stdout.splitlines()[-1])
    Successfully installed invocations-0.13.0 pep8-1.5.7 spec-1.3.1
    
  • Following the lead of most Unix CLI applications, it offers a traditional flag-based style of command-line parsing, deriving flag names and value types from task signatures (optionally, of course!):

    $ invoke clean --docs --bytecode build --docs --extra='**/*.pyo'
    $ invoke clean -d -b build --docs -e '**/*.pyo'
    $ invoke clean -db build -de '**/*.pyo'
    
  • Like many of its predecessors, it offers advanced features as well – namespacing, task aliasing, before/after hooks, parallel execution and more.

For documentation, including detailed installation information, please see http://pyinvoke.org. Post-install usage information may be found in invoke --help.

You can install the development version via pip install -e git+https://github.com/pyinvoke/invoke#egg=invoke.

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