Add automatic linting with GitHub Actions

.cc-tweaked.selene.yaml

@@ -0,0 +1,90 @@
+---
+base: lua52
+
+globals:
+  package.cpath:
+    removed: true
+  collectgarbage:
+    removed: true
+  _HOST:
+    property: read-only
+  _CC_DEFAULT_SETTINGS:
+    property: read-only
+  _CC_DISABLE_LUA51_FEATURES:
+    property: read-only
+  sleep:
+    property: read-only
+    args:
+      - type: number
+        required: true
+  write:
+    property: read-only
+    args:
+      - type: string
+        required: true
+  printError:
+    property: read-only
+    args:
+      - type: "..."
+        required: true
+  read:
+    property: read-only
+    args:
+      - type: string
+        required: false
+      - type: table
+        required: false
+      - type: function
+        required: false
+      - type: string
+        required: false
+  colors:
+    property: read-only
+  colours:
+    property: read-only
+  commands:
+    property: read-only
+  disk:
+    property: read-only
+  fs:
+    property: read-only
+  gps:
+    property: read-only
+  help:
+    property: read-only
+  http:
+    property: read-only
+  io:
+    property: read-only
+  keys:
+    property: read-only
+  multishell:
+    property: read-only
+  os:
+    property: read-only
+  paintutils:
+    property: read-only
+  parallel:
+    property: read-only
+  peripheral:
+    property: read-only
+  pocket:
+    property: read-only
+  rednet:
+    property: read-only
+  redstone:
+    property: read-only
+  settings:
+    property: read-only
+  shell:
+    property: read-only
+  term:
+    property: read-only
+  textutils:
+    property: read-only
+  turtle:
+    property: read-only
+  vector:
+    property: read-only
+  window:
+    property: read-only

.github/workflows/lint.yaml

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+name: Linting
+
+on:
+  push:
+    paths: ["**.lua", ".github/workflows/lint.yaml"]
+  pull_request:
+    paths: ["**.lua", ".github/workflows/lint.yaml"]
+  workflow_dispatch:
+
+jobs:
+  lint-selene:
+    name: Lint Lua with Selene
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - uses: NTBBloodbath/selene-action@v1.0.0
+        with:
+          # Github secret token
+          token: ${{ secrets.GITHUB_TOKEN }}
+          # selene arguments
+          args: . --config .selene.toml
+          # selene version
+          version: 0.23.1
+

.selene.toml

@@ -0,0 +1,5 @@
+std = ".cc-tweaked.selene"
+exclude = ["./unicorn/semver.lua"]
+
+[lints]
+incorrect_standard_library_use = "allow" # Workaround for https://github.com/Kampfkarren/selene/issues/467