codecov unable to find coverage on PATH because env is not inherited

[alex]

I'm currently facing an issue where codecov cannot find the Python coverage program on the PATH, and therefore does not process the coverage. I believe this is because of how index.js here manages the environ.

Specifically, it fully overrides it:

codecov-action/index.js

Lines 52 to 59 in a3a6bec

	options.env = {
	GITHUB_ACTION: process.env.GITHUB_ACTION,
	GITHUB_RUN_ID: process.env.GITHUB_RUN_ID,
	GITHUB_REF: process.env.GITHUB_REF,
	GITHUB_REPOSITORY: process.env.GITHUB_REPOSITORY,
	GITHUB_SHA: process.env.GITHUB_SHA,
	GITHUB_HEAD_REF: process.env.GITHUB_HEAD_REF || ''
	};

Based on reading the exec package's source, it's clear that this is the entire env provided, it is not merged with process.env.

I think the best way to handle this would be to merge these vars with process.env. At the very least, PATH needs to be inherited so tools can be found, otherwise you simply get the system default PATH.