[SKIP CI] .github/zephyr: simplify and fix the git describe performance hack #4

	---
	# yamllint disable-line rule:truthy
	on:
	push:
	branches:
	- 'main'
	- 'stable-**'
	- '**-stable'
	pull_request:
	branches:
	- 'main'
	- 'stable-**'
	- '**-stable'

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:
	# Allows to call this forkflow from other workflows
	workflow_call:

	jobs:

	# This is unfortunately a mix of sof-docs/.github/ + pull-request.yml#doxygen
	# duplicating a bit of both: please keep in sync with both. We
	# build sof-docs here too because waiting for sof-docs CI to find
	# regressions introduced in sof.git is very time-consuming, see
	# example in
	# https://github.com/thesofproject/sof/pull/5731#issuecomment-1175630147
	sof-docs:
	runs-on: ubuntu-20.04 # sof-docs is still stuck to this for now

	steps:
	- uses: actions/checkout@v4
	with:
	filter: 'tree:0'

	- name: apt-get update
	run: sudo apt-get update

	- name: apt-get install
	run: sudo apt-get -y install
	doxygen make default-jre graphviz cmake ninja-build

	- name: doxygen
	run: cmake -GNinja -S doc/ -B doxybuild/ && ninja -C doxybuild/ -v doc

	# Nested git clone, this is fine
	- name: clone sof-docs
	run: git clone https://github.com/thesofproject/sof-docs sof-docs/

	- name: PATH += .local/bin
	run: echo "$HOME/.local/bin" >> $GITHUB_PATH

	- name: 'pip install -r sof-docs/scripts/requirements.txt'
	run: pip install -r sof-docs/scripts/requirements.txt

	- name: build sof-docs
	run: make -C sof-docs/ html SOF_DOC_BUILD="$(pwd)"/doxybuild/

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