Added support for GN (#3062)

components.json

@@ -466,6 +466,11 @@
 			"require": "c",
 			"owner": "Golmote"
 		},
+		"gn": {
+			"title": "GN",
+			"alias": "gni",
+			"owner": "RunDevelopment"
+		},
 		"go": {
 			"title": "Go",
 			"require": "clike",

components/prism-gn.js

@@ -0,0 +1,51 @@
+// https://gn.googlesource.com/gn/+/refs/heads/main/docs/reference.md#grammar
+
+Prism.languages.gn = {
+	'comment': {
+		pattern: /#.*/,
+		greedy: true
+	},
+	'string-literal': {
+		pattern: /(^|[^\\"])"(?:[^\r\n"\\]|\\.)*"/,
+		lookbehind: true,
+		greedy: true,
+		inside: {
+			'interpolation': {
+				pattern: /((?:^|[^\\])(?:\\{2})*)\$(?:\{[\s\S]*?\}|[a-zA-Z_]\w*|0x[a-fA-F0-9]{2})/,
+				lookbehind: true,
+				inside: {
+					'number': /^\$0x[\s\S]{2}$/,
+					'variable': /^\$\w+$/,
+					'interpolation-punctuation': {
+						pattern: /^\$\{|\}$/,
+						alias: 'punctuation'
+					},
+					'expression': {
+						pattern: /[\s\S]+/,
+						inside: null // see below
+					}
+				}
+			},
+			'string': /[\s\S]+/
+		}
+	},
+
+	'keyword': /\b(?:else|if)\b/,
+	'boolean': /\b(?:true|false)\b/,
+	'builtin-function': {
+		// a few functions get special highlighting to improve readability
+		pattern: /\b(?:assert|defined|foreach|import|pool|print|template|tool|toolchain)(?=\s*\()/i,
+		alias: 'keyword'
+	},
+	'function': /\b[a-z_]\w*(?=\s*\()/i,
+	'constant': /\b(?:current_cpu|current_os|current_toolchain|default_toolchain|host_cpu|host_os|root_build_dir|root_gen_dir|root_out_dir|target_cpu|target_gen_dir|target_out_dir|target_os)\b/,
+
+	'number': /-?\b\d+\b/,
+
+	'operator': /[-+!=<>]=?|&&|\|\|/,
+	'punctuation': /[(){}[\],.]/
+};
+
+Prism.languages.gn['string-literal'].inside['interpolation'].inside['expression'].inside = Prism.languages.gn;
+
+Prism.languages.gni = Prism.languages.gn;

examples/prism-gn.html

@@ -0,0 +1,24 @@
+<h2>Full example</h2>
+<pre><code># Source: https://gn.googlesource.com/gn/+/main/docs/cross_compiles.md
+
+declare_args() {
+  # Applies only to toolchains targeting target_cpu.
+  sysroot = ""
+}
+
+config("my_config") {
+  # Uses current_cpu because compile flags are toolchain-dependent.
+  if (current_cpu == "arm") {
+    defines = [ "CPU_IS_32_BIT" ]
+  } else {
+    defines = [ "CPU_IS_64_BIT" ]
+  }
+  # Compares current_cpu with target_cpu to see whether current_toolchain
+  # has the same architecture as target_toolchain.
+  if (sysroot != "" && current_cpu == target_cpu) {
+    cflags = [
+      "-isysroot",
+      sysroot,
+    ]
+  }
+}</code></pre>

plugins/autoloader/prism-autoloader.js

@@ -189,6 +189,7 @@
 		"xlsx": "excel-formula",
 		"xls": "excel-formula",
 		"gamemakerlanguage": "gml",
+		"gni": "gn",
 		"hbs": "handlebars",
 		"hs": "haskell",
 		"idr": "idris",

plugins/show-language/prism-show-language.js

@@ -89,6 +89,8 @@
 		"gdscript": "GDScript",
 		"gedcom": "GEDCOM",
 		"glsl": "GLSL",
+		"gn": "GN",
+		"gni": "GN",
 		"graphql": "GraphQL",
 		"hbs": "Handlebars",
 		"hs": "Haskell",