python shell scripts made easy
|Author:||Oliver Tonnhofer <email@example.com>|
The primary goal of scriptine is to make it easy to write shell scripts with python.
Scriptine does two things to solve this goal:
- Make it easy to create scripts and commands.
- Make it easy to work with files, directories and other shell commands.
To create commands with scriptine, you just create a normal python function for each command of your script and scriptine handles the rest. It creates command line option parser and calls the right function with the right options.
The second part of scriptine is a bunch of convenience classes and functions that make it easy to work with files, directories and other shell commands. It abstracts the different python modules like os, os.path, shutil and subprocess and offers a simple and easy to use interface. scriptine comes with an enhanced version of Jason Orendorff’s path module.
- Easy command creation. Each command is just a function.
- Automatic option parsing
- Automatic help text (--help)
- Log handling (with -v, --verbose and -q, --quite handling)
- Testing scripts in dry-mode. All destructive functions/methods are wrapped and will not be called when the -n or --dry-run option is set.
- Easy execution of other shell scripts.
- Convenient working with files and directories.
Here is a small example script:
import scriptine def example_command(name, countdown=False, repeat=10): """Show how scriptine works.""" if countdown: for i in range(repeat, 0, -1): print i, print 'Hello, %s!' % name if __name__ == '__main__': scriptine.run()
Usage of our small script:
% python test.py Usage: test.py command [options] Options: -h, --help show this help message and exit Commands: example Show how scriptine works. % python test.py example Pete Hello, Pete! % python test.py example Pete --countdown --repeat 5 5 4 3 2 1 Hello, Pete!
A more complex example:
from scriptine import run, path, log from scriptine.shell import call def to_png_command(dirname, outdir='out', extension='jpeg'): """ Convert all files with extension in dirname to .png. Only convert if result does not exists or is older. :param dirname: where to search for images :param outdir: where to store the results :param extension: file extension to convert """ outdir = path(outdir) if not outdir.exists(): outdir.makedirs() log.mark('converting %s/*.%s to %s/*.png', dirname, extension, outdir) for f in path(dirname).files('*.'+extension): outfile = outdir / f.namebase + '.png' if not outfile.exists() or f.newer(outfile): call(['convert', f, outfile]) if __name__ == '__main__': run()
The help text:
% python convert.py to-png --help Usage: test.py to-png [options] dirname Convert all files with extension in dirname to .png. Only convert if result does not exists or is older. Required arguments: dirname: where to search for images Options: -h, --help show this help message and exit --outdir=out where to store the results --extension=jpeg file extension to convert -n, --dry-run don't actually do anything -v, --verbose be more verbose -q, --quite be more silent
And the result:
% python convert.py to-png ~/images/ --extension gif ---> converting /Users/olt/images/*.gif to out/*.png % python convert.py to-png ~/images/ --extension gif -v ---> converting /Users/olt/images/*.gif to out/*.png INFO: call ['convert', '/Users/olt/images/foo.gif', 'out/foo.png'] INFO: call ['convert', '/Users/olt/images/bar.gif', 'out/foo.png']
The documentation can be found at http://packages.python.org/scriptine/
scriptine is still in development. Some parts will be changed and some more functionality will be added. Follow the development at http://bitbucket.org/olt/scriptine/ Comments and bug fixes are welcomed.
- 0.2.0a4 (2009-11-16)
- new command.cmd function for scripts with only one command
- added command.autocmds as a replacement for run
- 0.2.0a2 (2009-11-11)
- fixed missing files in MANIFEST.in
- 0.2.0a1 (2009-11-09)
- renamed path.getcwd to path.cwd
- converted properties to methods for values that might change (e.g. size, mtimes, etc)
- add path.newer method
- 0.1.0 (2009-11-05)
- first release
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