Fix workflow action failing when json file was not changed #2

# to view logs

	name: Sort JSON

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	jobs:
	sort-json:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v2

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: '3.x'

	- name: Run JSON sorter
	run: python sort.py airports.json airports.json icao

	- name: Check if airports.json file changed
	id: file_changed
	run: \|
	if git diff --exit-code airports.json; then
	echo "File did not change"
	echo "changed=false" >> $GITHUB_ENV
	else
	echo "File was changed"
	echo "changed=true" >> $GITHUB_ENV
	fi

	- name: Commit and push changes
	if: env.changed == 'true'
	run: \|
	git config --global user.name 'github-actions'
	git config --global user.email 'github-actions@github.com'
	git add airports.json
	git commit -m 'Automatically sorted Airports JSON file'
	git push
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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