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System dependency version checker.

Project description


...chews through your system dependencies, spitting out incompatible versions.

When onboarding new team members, ensuring their computer has everything needed to work on the project can be painful. Verchew is a command-line program and embeddable Python script to check the versions of your project's system dependencies. Its only external dependency is any Python interpreter, which should already be installed on macOS and most Linux-based operating systems.

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  • Python 2.7+ or Python 3.3+


Install verchew globally with pipx (or pip):

$ pipx install verchew

or add it to your Poetry project:

$ poetry add verchew

or embedded the script in your project using this guide.


Run verchew --init to generate a sample configuration file.

Update this file (verchew.ini) to include your project's system dependencies:

[Working Program]

cli = working-program
version = 1.2

[Newer Working Program]

cli = working-program
version =  4.1 || 4.2
message = Version 4.x is required to get the special features.

[Broken Program]

cli = broken-program
version = 1.2.3

[Optional Missing Program]

cli = missing-program
version = 1.2.3
optional = true

[Missing Program]

cli = missing-program
version = 1.2.3

Run verchew to see if you have the expected versions installed:

$ verchew

Checking for Working Program...

$ working-program --version
✔ MATCHED: 1.2

Checking for Newer Working Program...

$ working-program --version
✘ EXPECTED: 4.1 || 4.2
䷉ MESSAGE: Version 4.x is required to get the special features.

Checking for Broken Program...

$ broken-program --version
An error occurred.
✘ EXPECTED: 1.2.3

Checking for Optional Missing Program...

$ missing-program --version
sh: command not found: missing-program

Checking for Missing Program...

$ missing-program --version
sh: command not found: missing-program
✘ EXPECTED: 1.2.3

Results: ✔ ✘ ✘ ▴ ✘

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