CHANGE: Add CI job to check Editor references in Runtime code

.github/workflows/check-runtime-editor-refs.yml

@@ -0,0 +1,20 @@
+name: Check Editor references in Runtime code
+
+on:
+  pull_request:
+    types:
+      - edited
+      - opened
+      - synchronize
+    branches: [ "develop" ]
+
+  workflow_dispatch:
+
+jobs:
+  check-runtime-editor-refs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Check Runtime code has no Editor namespace references
+        run: bash check-runtime-editor-refs.sh

check-runtime-editor-refs.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+RUNTIME_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/Packages/com.unity.inputsystem/InputSystem/Runtime"
+
+# PCRE2 regexes — \b prevents matching identifiers that merely contain these strings.
+# (\.[A-Za-z0-9_]+)* covers sub-namespaces (UnityEditor.UI, …Editor.Tools, …).
+# Add more lines as needed, e.g. '\bUnityEditorInternal(\.[A-Za-z0-9_]+)*\b'
+FORBIDDEN_REGEX=(
+    '\bUnityEditor(\.[A-Za-z0-9_]+)*\b'
+    '\bUnityEngine\.InputSystem\.Editor(\.[A-Za-z0-9_]+)*\b'
+)
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+NC='\033[0m'
+
+INCLUDE_COMMENTS=false
+for arg in "$@"; do
+    case "$arg" in
+        --include-comments) INCLUDE_COMMENTS=true ;;
+        --help)
+            cat <<EOF
+Usage: $(basename "$0") [OPTIONS]
+
+Check that Runtime code has no Editor namespace dependencies.
+Patterns are PCRE2; edit FORBIDDEN_REGEX in this script to add roots.
+
+Options:
+  --include-comments   Also flag references inside XML doc and // comments
+  --help               Show this help
+EOF
+            exit 0 ;;
+        *) echo "Unknown option: $arg"; exit 1 ;;
+    esac
+done
+
+[ -d "$RUNTIME_DIR" ] || { echo -e "${RED}ERROR: Runtime directory not found: $RUNTIME_DIR${NC}" >&2; exit 1; }
+
+COMBINED=$(IFS='|'; echo "${FORBIDDEN_REGEX[*]}")
+
+if [ "$INCLUDE_COMMENTS" = false ]; then
+    PATTERN="^(?!\s*//).*(?:$COMBINED)"
+else
+    PATTERN="(?:$COMBINED)"
+fi
+
+VIOLATIONS=$(rg --type cs --line-number --no-heading --color never --pcre2 "$PATTERN" "$RUNTIME_DIR" 2>/dev/null || true)
+
+if [ -z "$VIOLATIONS" ]; then
+    echo -e "${GREEN}PASS: No Editor namespace references found in Runtime code.${NC}"
+    exit 0
+fi
+
+VIOLATION_COUNT=$(echo "$VIOLATIONS" | wc -l | tr -d ' ')
+echo -e "${RED}FAIL: Found $VIOLATION_COUNT Editor namespace reference(s) in Runtime code:${NC}"
+echo ""
+echo "$VIOLATIONS"
+echo ""
+echo -e "${RED}Active patterns:${NC}"
+for re in "${FORBIDDEN_REGEX[@]}"; do
+    printf '  \033[0;31m%s\033[0m\n' "$re"
+done
+exit 1