Pio-env-graph - visualize your platformio.ini as a dependency graph

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Hey folks! I built a small CLI tool that reads your platformio.ini and generates a Graphviz DOT graph of how your sections relate to each other via extends.

If your config has grown to the point where you can’t remember what extends what — this might help.

What it does:

  • Parses platformio.ini + extra_configs (including globs)
  • Shows extends chains as a directed graph
  • Color-codes nodes: green for [env:*], gray for shared sections, red for missing targets
  • Optionally shows ${section.key} references as dashed edges

Quick start:

pip install pio-env-graph
pio-env-graph | dot -Tpng -o graph.png

Here’s what the output looks like for one of my projects:

graph
graph1409×708 81 KB

GitHub: GitHub - eagafonov/pio-env-graph: Visualize dependencies between PlatformIO environments as a Graphviz DOT graph · GitHub

PyPI: pio-env-graph · PyPI

License: MIT

It’s still early days, so feedback and bug reports are welcome. Would love to hear if it’s useful for anyone else!

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