Lightweight Tool for Visualizing Module Dependencies in Mixed-Language Projects

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Hi everyone!

I recently put together a lightweight open-source tool for visualizing dependencies among Fortran modules. I built it because I wanted a simple way to inspect relationships and graphs in larger mixed-language CMake-driven projects, where fpm-based graph generation is not always applicable.

Repo at GitHub: FortGraph

The project has two parts:

  • a Python parser that scans Fortran source files (single files or recursively through a tree) and produces a JSON representation of the dependency graph
  • a standalone HTML app that loads that JSON for interactive visualization, and also supports lightweight in-browser graph building/parsing from pasted USE statements

I kept the parser and viewer separate so the visualization layer can be reused with other datasets as well.

The parser is intentionally lightweight, so I expect it to miss edge cases and more complex constructs. Still, it has already been useful for my own project and workflow, and Iā€™m sharing it in case it helps others.

Suggestions and contributions are very welcome!

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