Metadata-Version: 2.1
Name: shtk
Version: 0.9.4
Summary: Shell ToolKit (SHTK)
Home-page: UNKNOWN
Author: Jon Roose
Author-email: jroose@gmail.com
Maintainer: Jon Roose
Maintainer-email: jroose@gmail.com
License: BSD 3-Clause License
Description: # Python Shell Toolkit (SHTK)
        
        Python SHTK is a python module that seeks to make replacing shell scripts with
        Python scripts an easier process.  Python has a number of syntax advantages
        over traditional shell scripting languages such as BASH, including:
        * Classes
        * Modules
        * With statements
        * Try/Except statements
        * Async and await for coroutines
        
        The module and package oriented structure of Python's toolchain enables broad
        code re-use and redistribution. Python also benefits from a wide selection of
        built-in modules, and expands itself via the wide assortment of packages
        that can be quickly installed using its built-in package manager. 
        
        Finally, built-in automated test harnesses and long-standing code-quality
        integrations make it easy to review, document, test, and maintain its
        libraries.  
        
        SHTK is written with the assumption that you want to run more than one command.
        Towards this end, improvements over Python's built-in subprocess library
        include:
        * Much shorter code -- designed to be as close to BASH as possible
        * Easy piping of stdout to other commands' stdin
        * Easy redirects to files
        * Shell objects to track and manage cwd and environment variables
        * An evaluate() function that returns the text a command wrote to stdout
        * Optional NonzeroExitCodeException raised in response to non-zero exit codes
        * Connects commands to sys.stdin, sys.stdout, and sys.stderr by default
        
        The author's primary intended use cases for Python SHTK include replacing BASH
        scripts that automate builds of disk images, docker containers, and system
        configurations.
        
        ## Installation
        Using pip you can install shtk as follows:
        ```
        pip3 install shtk
        ```
        
        Or you can install the module from source as follows:
        ```
        pip3 install .
        ```
        
        ## Tests
        To run the automated tests, run the following command from the project's root
        directory:
        
        ```
        pip3 install coverage
        python3 run_tests.py
        ```
        
        ## Documentation
        The documentation is publically available at https://shtk.readthedocs.org
        
        To build the documentation from source, run the following which generates
        documention in ./docs/html/index.html
        
        ```
        cd docs
        make html
        cd ..
        ```
        
        ## Examples
        
        ```
        import shtk
        
        sh = shtk.Shell.get_shell()
        
        ls = sh.command('ls')
        wc = sh.command('wc')
        cat = sh.command('cat')
        sleep = sh.command('sleep')
        touch = sh.command('touch')
        
        #touch tmp.txt
        sh(touch('tmp.txt'))
        
        #cat tmp.txt
        sh(cat('tmp.txt'))
        
        #cat tmp.txt | wc -l
        sh(cat('tmp.txt') | wc('-l'))
        
        #wc -l < tmp.txt
        sh(wc('-l').stdin('tmp.txt'))
        
        #ls | wc -l > /dev/null
        sh(ls | wc('-l').stdout(None))
        
        #ls | wc -l > tmp.txt
        sh(ls | wc('-l').stdout('tmp.txt'))
        
        #ls | wc -l >> tmp.txt
        sh(ls | wc('-l').stdout('tmp.txt', mode='a'))
        
        with open('test_file1.txt', 'w') as fout:
            msg = """
        abc
        xyz
        The quick brown fox jumps over the lazy dog.
        """.lstrip()
            print(msg, file=fout)
        
        try:
            # ls test_file2.txt 2> /dev/null | wc -l
            sh(
                ls('test_file2.txt').stderr('/dev/null') | wc('-l')
            )
        except shtk.NonzeroExitCodeException:
            print("Caught a failure")
        
        sh(
            ls('test_file1.txt')
        )
        
        #echo $(ls | wc -l)
        print(sh.evaluate(ls | wc('-l')).strip())
        
        ```
        
        More examples can be found in the source code's examples directory, but they're
        still under construction.
        
        BSD 3-Clause License
        
        Copyright (c) 2021, Jon Roose
        All rights reserved.
        
        Redistribution and use in source and binary forms, with or without
        modification, are permitted provided that the following conditions are met:
        
        1. Redistributions of source code must retain the above copyright notice, this
           list of conditions and the following disclaimer.
        
        2. Redistributions in binary form must reproduce the above copyright notice,
           this list of conditions and the following disclaimer in the documentation
           and/or other materials provided with the distribution.
        
        3. Neither the name of the copyright holder nor the names of its
           contributors may be used to endorse or promote products derived from
           this software without specific prior written permission.
        
        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
        AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
        DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
        FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
        SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
        CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
        OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
        OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        
Keywords: shell subprocess
Platform: UNKNOWN
Classifier: License :: OSI Approved :: BSD License
Classifier: Programming Language :: Python :: 3
Description-Content-Type: text/markdown
Provides-Extra: test
