VSI Common

Linux	Windows	macOS	docs

In order to use these directories, all you have to do is

• Linux (bash)

  source env.bsh

• Windows (batch)

  call env.bat

• Python

  • Preferred

    pip install git+https://github.com/visionsystemsinc/vsi_common.git

  • Other options

    git clone git@github.com:visionsystemsinc/vsi_common.git .

    and one of

    pip install .
    python setup.py install

    Developers of a module should install an editable version of the library in your python environment by cloning the repo and running one of

    python setup.py develop
    pip install -e .

What is this repository for?

• Common tools we use at VSI for any project/effort where we can use this "VSI" asset

How do I get set up?

• Summary of set up

• Configuration

• Dependencies

• Database configuration

• How to run tests

  • To run all the unit tests for python

    python -m unittest discover -s {vsi_python_dir}

• Deployment instructions

Contribution guidelines

• Adding files

  • Python

    • Add files in the python directory. If it's a new effort, try and add it to the vsi package. If it is a large library and you don't have time to convert everything now, you can add it to the python dir in its own directory, and add a .pth file for it. Do NOT add .py file in the main python dir

  • Script

    • Linux scripts (written in bash, python, etc..) That are to be CLI only (not a python library meant to be imported EVER) go in the linux directory

      • Start files with

        #!/usr/bin/env bash

        or

        #!/usr/bin/env python

    • Windows scripts (batch mainly) go in the windows directory

      • Start files with

        @echo off

      • If you have a python script you would like to use as a command line, make it a .bat file, and start it with

        1>2# : ^
        '''
        @echo off
        python %~f0 %*
        exit /b
        '''

        • This will start the python in your path, and pass the script and all arguments, as uncorrupted as possible in windows batch.

        • This can work for anything other than python.

        • Use pythonw instead for gui tasks.

        • For special characters (like |), you'll need to add an escape character (^|) just to run the command, and then 2^n more for every batch file. So to call this batch file, you'll need 3 carats (^^^|). To escape !, you'll need to create a setlocal ENABLEDELAYEDEXPANSION arond the python call itself (its the %* part that is important). Side effects are currently unknown for using setlocal in this way, so it is not the default yet...

          setlocal ENABLEDELAYEDEXPANSION
          python %~f0 %*
          endlocal

    • If a script belongs in both (somehow) put it in Windows, and a relative (../Windows/myscript) symlink in Linux

• Writing tests

  • Python

    • Write tests for your modules using the unittest

    • Tests should be stored separately in files names "test_*.py"

      import unittest
      class MyTestClass(unittest.TestCase):
        def test_something(self): #This function MUST start with "test_"
          doSomething();
          self.assertEqual('abc', 'a'+'bc')

    • Test classes can contain a setUp function and tearDown function to be called before and after testing starts

      class MyTestClass(unittest.TestCase):
        def setUp(self):
          self.blah = doSomethingInitialize()
        def tearDown(self):
          cleanUpEverything(self.blah)
          self.blah = None

• Code review

• Other guidelines

Documentation

Documentation uses sphinx. To compile documentation, run

just docs
just docs view

Sphinx documentation can be embedded in any source file. There must be a #*# comment stating the filename and any # comments surrounded with #** will be added to sphinx documentation

# This documentation path will become:
#   {VSI_COMMON_DIR}/docs/example/readme.auto.rst
# Other files will refer to is the document with .auto. in the name
#*# example/readme.rst


# The following three lines are included

#**
# .. note::
#
#     You can not run the script and download in one call, you must call new_just as a file, not a pipe stream. ``
#**

# This line is not documentation
# No #** at the beginning of this line

Documentation FAQ

1. Why is there an bash:env directive, when envvar already exists?

   • They are both for documenting environment variables, bash:env should be used for locally scoped variables, that only affect that one file, while envvar might affect many files.

Who do I talk to?

• Repo owner or admin
• Other community or team contact