Merge pull request #5108 from sellout/lexer-error-messages #1204

	name: Haddocks

	defaults:
	run:
	working-directory: unison
	shell: bash

	on:
	push:
	branches:
	- trunk

	jobs:
	build:
	name: Haddocks
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v4
	with:
	path: unison

	- name: restore stack caches
	uses: unisonweb/actions/stack/cache/restore@main
	with:
	cache-prefix: haddocks
	stack-yaml-dir: unison

	- name: install stack
	uses: unisonweb/actions/stack/install@main

	- name: build with haddocks
	working-directory: unison
	run: stack build --fast --haddock

	- name: save stack caches
	uses: unisonweb/actions/stack/cache/save@main
	with:
	cache-prefix: haddocks
	stack-yaml-dir: unison

	# Haddocks
	- name: Checkout haddocks branch
	uses: actions/checkout@v4
	with:
	ref: haddocks
	path: haddocks

	# Needed for `git commit` below
	- name: set git user info
	working-directory: unison
	run: \|
	git config --global user.name "GitHub Actions"
	git config --global user.email "actions@github.com"

	- name: Copy haddocks
	working-directory: unison
	run: \|
	docs_root="$(stack path --local-doc-root)"
	# Erase any stale files
	cd "$GITHUB_WORKSPACE"/haddocks
	rm -rf ./*
	git checkout --orphan fresh-haddocks-branch
	cp -r "${docs_root}"/* "$GITHUB_WORKSPACE"/haddocks
	git add .
	git commit -m "Regenerated haddocks based on ${GITHUB_SHA}"
	# Push the branch with only a single commit over the remote
	git push --force origin fresh-haddocks-branch:haddocks

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