Add i18n system

.github/scripts/i18n.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+
+# SPDX-FileCopyrightText: 2019 Corentin Noël <tintou@noel.tf>
+# SPDX-FileCopyrightText: 2022 Janet Blackquill <uhhadd@gmail.com>
+#
+# SPDX-License-Identifier: GPL-3.0-only
+
+# adapted from https://github.com/elementary/actions/blob/master/gettext-template/entrypoint.sh
+
+set -e
+
+export DEBIAN_FRONTEND="noninteractive"
+
+# if a custom token is provided, use it instead of the default github token.
+if [ -n "$GIT_USER_TOKEN" ]; then
+  GITHUB_TOKEN="$GIT_USER_TOKEN"
+fi
+
+if [ -z "${GITHUB_TOKEN}" ]; then
+  echo "\033[0;31mERROR: The GITHUB_TOKEN environment variable is not defined.\033[0m"  && exit 1
+fi
+
+# Git repository is owned by another user, mark it as safe
+git config --global --add safe.directory /github/workspace
+
+# get default branch, see: https://davidwalsh.name/get-default-branch-name
+DEFAULT_BRANCH="$(git remote show origin | grep 'HEAD branch' | cut -d' ' -f5)"
+
+if [ -z "${INPUT_TRANSLATION_BRANCH}" ]; then
+  TRANSLATION_BRANCH="${DEFAULT_BRANCH}"
+else
+  TRANSLATION_BRANCH="${INPUT_TRANSLATION_BRANCH}"
+fi
+
+# default email and username to github actions user
+if [ -z "$GIT_USER_EMAIL" ]; then
+  GIT_USER_EMAIL="action@github.com"
+fi
+if [ -z "$GIT_USER_NAME" ]; then
+  GIT_USER_NAME="GitHub Action"
+fi
+
+# make sure branches are up-to-date
+git fetch
+echo "Setting up git credentials..."
+git remote set-url origin https://x-access-token:"$GITHUB_TOKEN"@github.com/"$GITHUB_REPOSITORY".git
+git config --global user.email "$GIT_USER_EMAIL"
+git config --global user.name "$GIT_USER_NAME"
+echo "Git credentials configured."
+
+# get the project's name:
+PROJECT="$(basename "$GITHUB_REPOSITORY")"
+echo "Project: $PROJECT"
+
+sudo apt-get -qq update
+sudo apt-get -qq install python3-git
+
+dotnet tool install --global GetText.NET.Extractor --version 1.6.6
+
+GetText.Extractor --order -s TShock.sln -t i18n/template.pot
+
+python3 .github/scripts/check-diff.py