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Trigger custom commands from filesystem events.

Project description

Patrol

Trigger methods from changed files - e.g. selectively rebuild your project or run tests as soon as you hit the save button on your text editor or IDE.

Patrol works well with ProjectKey.

Use

To install:

pip install patrol

Example code:

import patrol

def build(filenames):
    touch("output/build_started")
    time.sleep(2)
    touch("output/build_finished")

def run_test(filenames):
    touch("output/test_started")
    time.sleep(30)
    touch("output/test_finished")

patrol.watch([
        patrol.Trigger(
            build,
            includes=["data/*", ],
            excludes=['data/exclude/*', 'output/*', ],
        ),
        patrol.Trigger(
            run_test,
            includes=["data/*", ],
            excludes=['data/exclude/*', 'output/*', ],
            reaper=patrol.Reaper(),         # If triggered while method is in progress, this will stop it and start it again.
            fire_on_initialization=True,    # When the watch is initiated, this trigger will also fire.
        ),
    ],
    directory=os.getcwd(),            # By default it patrols the present working directory.
    lockfiles=[".git/index.lock", ],  # This will wait until git has finished its operations before firing any triggers
)

Features

  • Patrol does not use polling to detect file changes. It uses libuv, which creates event driven hooks to filesystem events using epoll, kqueue or IOCP.
  • You can queue up triggers when a specified lockfile is present - e.g. you can use to prevent triggers from firing until git operations are done.
  • Patrol comes with a customized Reaper class that can be used to specify how a process is stopped.

Project details


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Files for patrol, version 0.3.1
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