fix post list maker #9

	name: make recent post list
	on: push
	jobs:
	make:
	runs-on: macos-latest
	steps:
	- uses: actions/checkout@v3

	- uses: actions/setup-node@v3
	with:
	node-version: 18

	- uses: actions/cache@v3
	id: cache
	with:
	path: node_modules
	key: yarn-${{ hashFiles('**/yarn.lock') }}

	- name: install
	if: steps.cache.outputs.cache-hit != 'true'
	run: yarn

	- name: set birthtime
	run: \|-
	git ls-tree -r --name-only HEAD \| while read filename; do
	unixtime=$(git log -1 --format="%at" -- "${filename}")
	touchtime=$(date -r ${unixtime} +'%Y%m%d%H%M.%S')
	touch -t ${touchtime} "${filename}"
	done

	- name: make post list
	id: posts
	run: node .github/make-post-list.js

	- run:
	echo "${{ steps.posts.outputs.posts }}"

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