fix: create workflow evaluating if def file changed instead of input trigger #1

	name: Check Container Definition file changed

	on:
	pull_request:
	branches:
	- master
	workflow_dispatch:

	jobs:
	check_def_changed: # evaluate whether build needs to be run / cache updated
	runs-on: ubuntu-latest
	outputs:
	changed: ${{ steps.check_file.outputs.changed }}

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Check if file changed
	id: check_file
	shell: bash
	run: \|
	if [[ $(git diff --name-only origin/master...HEAD -- 'resources/retinal-rl.def') ]]; then
	echo "changed=true" >> $GITHUB_OUTPUT
	else
	echo "changed=false" >> $GITHUB_OUTPUT
	fi

	ensure_container: # main cache should provide the container if def file not changed
	name: Conditionally Build and update cache of branch
	needs: check_def_changed
	if: needs.check_def_changed.outputs.changed == 'true'
	uses: ./.github/workflows/update_cache.yml
	with:
	build: true

	checks:
	name: Run linter and simple functionality test
	needs: ensure_container
	if: needs.ensure_container.result == 'skipped' \|\| needs.ensure_container.result == 'success'
	uses: ./.github/workflows/code_check.yml

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