versionoverlord 0.5.5

Dependency Manager

Rationale

These utilities are meant to solve a problem with related respositories and their dependency relationships

Projects may have hierarchical dependencies. See the following Pyut dependency diagram.

---
title: Pyut Dependency Graph
---
flowchart
	direction LR
	
  pyut(Pyut 7.7.0) --> oglio(oglio 0.5.80)
  pyut(Pyut 7.7.0) --> pyutplugins(pyutplugins 0.8.40)
  
  pyutplugins(pyutplugins 0.8.40) -.-> oglio(oglio 0.5.80)
  pyutplugins(pyutplugins 0.8.40) & oglio(oglio 0.5.80) --> untanglepyut.0.6.40

   pyut(Pyut 7.7.0) & oglio(oglio 0.5.80) & untanglepyut.0.6.40 --> ogl.0.70.20
   
   pyut(Pyut 7.7.0) &  pyutplugins(pyutplugins 0.8.40) &  oglio(oglio 0.5.80) &  untanglepyut.0.6.40 &  ogl.0.70.20 -...-> pyutmodel.1.4.1
   pyut(Pyut 7.7.0) & pyutplugins(pyutplugins 0.8.40) & ogl.0.70.20 ----> hasiicommon.0.1.1

    style pyut fill:#ee4,stroke:#333,stroke-width:
    %% linkStyle 1 stroke:#ff3,stroke-width:4px,color:red;

The above diagram illustrates how low level dependencies ripple up the dependency tree.

Dependency Locations

Additionally, projects may specify dependencies in different places. Examples of the dependency locations are

• setup.py
• requirements.txt
• .circleci/config.yml
• .travis.yml

Python Console Scripts

VersionOverlord means to handle this problem by providing a set of Python command line scripts to automate updating the first three of the above dependency specification locations

• querySlug -- queries repositories for their latest release version
• createSpec -- creates a dependency specification for a project
• updateDeps -- updates the supported dependency locations using the generated specification

Required Environment Variables

The above commands depend on the following environment variables.

GITHUB_ACCESS_TOKEN - A personal GitHub access token necessary to read repository release information
PROJECTS_BASE             -  The local directory where the python projects are based
PROJECT                          -  The name of the project;  It should be a directory name

See the GitHub Documentation for instructions on how to create a usable access token. These scripts assume that a developer keeps all checked out repositories in a single directory. An example, of a PROJECTS_BASE is:

export PROJECTS_BASE="${HOME}/PycharmProjects" 

This should be set in your shell startup script. For example .bash_profile.

The PROJECT environment variable should be set on a project by project basis. I recommend you use direnv to manage these. An example of a .envrc follows:

export PROJECT=pyutmodel
source pyenv-3.10.6/bin/activate

Slugs

The command line options for querySlug and createSpec are GitHub slugs. For example, for the following repositories

https://github.com/hasii2011/pyutmodel

https://github.com/hasii2011/hasiicommon

The slugs are hasii2011/pyutmode and hasii2011/hasiicommon, respectively.

Usage

From the above dependency diagram assume the following:

Both the pyutmodel and hasiicommon respositories have been updated. We need to update the ogl dependencies to match the lastest of both. Assume both GITHUB_ACCESS_TOKEN and PROJECTS_BASE are correctly set and PROJECT is set to 'ogl'. Use the following CLI invocation to create the specification file.

createSpec -s hasii2011/pyutmodel -s hasii2011/hasiicommon

The command creates the file versionSpecification.csv with the following contents.

PackageName,OldVersion,NewVersion
pyutmodel,1.4.0,1.4.1
hasiicommon,0.0.7,0.1.0                   

Again assuming the previously mentioned environment variables are set the following CLI invocation;

updateDeps

correctly updates the following

• setup.py
• requirements.txt
• .circleci/config.yml

Installation

pip install versionoverlord

---

Written by Humberto A. Sanchez II (C) 2023

Note

For all kind of problems, requests, enhancements, bug reports, etc., please drop me an e-mail.

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