feat: post translation validation errors as a GitHub comment | FC-0012 #2923

	# Validate the po files to ensure translation files are compilable.

	name: Validate translation PO files

	on:
	pull_request:

	jobs:
	validate-po-files:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	pull-requests: write
	steps:
	# Clones the openedx-translations repo
	- name: clone openedx/openedx-translations
	uses: actions/checkout@v3

	- name: Install gettext
	run: \|
	sudo apt install -y gettext

	- name: Validate translation files
	id: validate_translation_files
	run: \|
	has_validation_errors=0
	python scripts/validate_translation_files.py 2>validation_errors.txt \|\| has_validation_errors=1
	cat validation_errors.txt

	{
	echo 'VALIDATION_ERRORS<<EOF'
	fold -w 100 -s validation_errors.txt
	echo EOF
	} >> "$GITHUB_OUTPUT"

	exit $has_validation_errors

	# Due to GitHub Actions security reasons this will not work on fork pull requests.
	# This shouldn't be an issue, because bots writes directly to this repository.
	- name: Post translation validation results as a comment
	if: always()
	uses: mshick/add-pr-comment@7c0890544fb33b0bdd2e59467fbacb62e028a096
	with:
	issue-number: ${{ github.event.pull_request.number }}
	message: \|
	:white_check_mark: All translation files are valid.

	This comment has been posted by the `validate-translation-files.yml` GitHub Actions workflow.

	message-failure: \|
	:warning: There are errors in the translation files:

	```
	${{ steps.validate_translation_files.outputs.VALIDATION_ERRORS }}
	```

	This comment has been posted by the `validate-translation-files.yml` GitHub Actions workflow.

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