prey 0.1.0

A tool for writing shell scripts in python.

prey

#!/usr/bin/env prey

async def main():
    await _("cat pyproject.toml | grep name")

    branch = await _("git branch --show-current")
    await _(f"dep deploy --branch={branch}")

    await _(
        [
            "sleep 1; echo 1",
            "sleep 2; echo 2",
            "sleep 3; echo 3",
        ]
    )

    name = "foo bar"
    await _(f"mkdir /tmp/${name}")

A tool for writing shell scripts in Python. Inspired by google/zx. This package provides a wrapper around asyncio.subprocess and escapes arguments.

Install

pip install prey

Documentation

Wrap your scripts in an async function called main:

async def main():
    # script...

It must be called main as the executable looks for a function calls main and calls it. This is used so commands can be asynchronous.

You can add the shebang at the top of your script:

#!/usr/bin/env prey

and run it like so:

chmod +x ./script.py
./script.py

Or via the prey executable:

prey ./script.py

When using prey via the executable or a shebang, all of the functions (_, colorama, request, etc) are available wihtout any imports.

await _("command")

Asychronously executes a given string using the create_subprocess_shell function from the asyncio.subprocess module and returns the output.

count = int(await _("ls -1 | wc -l"))
print(f"Files count: {count}")

cd("filepath")

Changes the current working directory.

cd("/tmp")
await _('pwd') # outputs /tmp

colorama package

The colorama package is available without importing inside scripts.

print(f"{colorama.Fore.BLUE}Hello World!")

request package

A wrapper around aiohttp, aiohttp-requests.requests.session.request, is available without importing inside scripts.

response = await request("get", "http://python.org")
html = await response.text()

Importing from other scripts

It is possible to make use of _ and other functions via explicit imports:

#!/usr/bin/env prey
from prey import _
await _('date')

Passing env variables

os.environ["FOO"] = "bar"
await _('echo $FOO')