Add luacheck CI

.github/workflows/luacheck.yml

@@ -0,0 +1,52 @@
+# This is a basic workflow to help you get started with Actions
+
+name: luacheck
+
+# Controls when the workflow will run
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+      
+      - name: luacheck
+        # You may pin to the exact commit or the version.
+        # uses: nebularg/actions-luacheck@86af42dcf465915896671903fcdec3e01a492e87
+        uses: nebularg/actions-luacheck@v1.1.0
+        #with:
+        # A list of files, rockspecs, or directories to be checked.
+        # Defaults to the workspace path as set by the `path` input.
+
+        #files: # optional, default is .
+        # The working directory for luacheck.
+        # The file list should be relative to this path and output filenames be displayed relative to this path.
+        # Defaults to the workspace path.
+
+        #path: # optional, default is ${{ github.workspace }}
+        # Additional command-line arguments.
+        # See https://luacheck.readthedocs.io/en/stable/cli.html
+
+        #args: # optional
+        # URL to a custom configuration (`.luacheckrc`) file that will be used as the default configuration file.
+
+        #config: # optional
+        # Emits annotations for source code at locations parsed from the output. Must be set to "none", "warning" or "error".
+        # Requires that output of warnings not be suppressed through the -qq or -qqq arguments.
+
+        #annotate: # optional, default is none

README.md

@@ -1,3 +1,5 @@
+![luacheck](https://github.com/dacmot/maple/actions/workflows/luacheck.yml/badge.svg)
+
 # Maple
 Maple Tree for Minetest by ExeterDad