Add firestore rules language setup

Author: ChFlick

language-configuration.json

@@ -0,0 +1,30 @@
+{
+    "comments": {
+        // symbol used for single line comment. Remove this entry if your language does not support line comments
+        "lineComment": "//",
+        // symbols used for start and end a block comment. Remove this entry if your language does not support block comments
+        "blockComment": [ "/*", "*/" ]
+    },
+    // symbols used as brackets
+    "brackets": [
+        ["{", "}"],
+        ["[", "]"],
+        ["(", ")"]
+    ],
+    // symbols that are auto closed when typing
+    "autoClosingPairs": [
+        ["{", "}"],
+        ["[", "]"],
+        ["(", ")"],
+        ["\"", "\""],
+        ["'", "'"]
+    ],
+    // symbols that that can be used to surround a selection
+    "surroundingPairs": [
+        ["{", "}"],
+        ["[", "]"],
+        ["(", ")"],
+        ["\"", "\""],
+        ["'", "'"]
+    ]
+}

package.json

@@ -7,18 +7,22 @@
 		"vscode": "^1.37.0"
 	},
 	"categories": [
-		"Other"
-	],
-	"activationEvents": [
-		"onCommand:extension.helloWorld"
+		"Programming Languages"
 	],
 	"main": "./out/extension.js",
 	"contributes": {
-		"commands": [{
-			"command": "extension.helloWorld",
-			"title": "Hello World"
-		}]
-	},
+        "languages": [{
+            "id": "firestorerules",
+            "aliases": ["Firestore Rules", "firestore"],
+            "extensions": ["rules","rule"],
+            "configuration": "./language-configuration.json"
+        }],
+        "grammars": [{
+            "language": "firestorerules",
+            "scopeName": "source.firebase",
+            "path": "./syntaxes/firestorerules.tmLanguage.json"
+        }]
+    },
 	"scripts": {
 		"vscode:prepublish": "yarn run compile",
 		"compile": "tsc -p ./",

syntaxes/firestorerules.tmLanguage.json

@@ -0,0 +1,32 @@
+{
+	"$schema": "https://raw.githubusercontent.com/martinring/tmlanguage/master/tmlanguage.json",
+	"name": "firestorerules",
+	"patterns": [
+		{
+			"include": "#keywords"
+		},
+		{
+			"include": "#strings"
+		}
+	],
+	"repository": {
+		"keywords": {
+			"patterns": [{
+				"name": "keyword.control.firestorerules",
+				"match": "\\b(if|while|for|return)\\b"
+			}]
+		},
+		"strings": {
+			"name": "string.quoted.double.firestorerules",
+			"begin": "\"",
+			"end": "\"",
+			"patterns": [
+				{
+					"name": "constant.character.escape.firestorerules",
+					"match": "\\\\."
+				}
+			]
+		}
+	},
+	"scopeName": "source.firebase"
+}