Added support for YANG (#2467)

components.json

@@ -1212,6 +1212,10 @@
 			"alias": "yml",
 			"owner": "hason"
 		},
+		"yang": {
+			"title": "YANG",
+			"owner": "RunDevelopment"
+		},
 		"zig": {
 			"title": "Zig",
 			"owner": "RunDevelopment"

components/prism-yang.js

@@ -0,0 +1,20 @@
+Prism.languages.yang = {
+	// https://tools.ietf.org/html/rfc6020#page-34
+	// http://www.yang-central.org/twiki/bin/view/Main/YangExamples
+	'comment': /\/\*[\s\S]*?\*\/|\/\/.*/,
+	'string': {
+		pattern: /"(?:[^\\"]|\\.)*"|'[^']*'/,
+		greedy: true
+	},
+	'keyword': {
+		pattern: /(^|[{};\r\n][ \t]*)[a-z_][\w.-]*/i,
+		lookbehind: true
+	},
+	'namespace': {
+		pattern: /(\s)[a-z_][\w.-]*(?=:)/i,
+		lookbehind: true
+	},
+	'boolean': /\b(?:false|true)\b/,
+	'operator': /\+/,
+	'punctuation': /[{};:]/
+};

examples/prism-yang.html

@@ -0,0 +1,50 @@
+<h2>Full example</h2>
+<p><a href="http://www.yang-central.org/twiki/bin/view/Main/YangExamplesExecdDns">Source</a></p>
+<pre><code>submodule execd-dns {
+
+	belongs-to execd { prefix execd; }
+
+	import inet-types { prefix inet; }
+
+	include execd-types;
+
+	description
+		"The 'dns' component provides support for configuring the DNS resolver.
+
+		 The 'domain' keyword of /etc/resolv.conf is not supported, since
+		 it is equivalent to 'search' with a single domain. I.e. in terms
+		 of the data model, the domains are always configured as 'search'
+		 elements, even if there is only one. The set of available options
+		 has been limited to those that are generally available across
+		 different resolver implementations, and generally useful.";
+
+	revision "2008-11-04" {
+		description "draft-ietf-netmod-yang-02 compatible.";
+	}
+	revision "2007-08-29" {
+		description "Syntax fixes after pyang validation.";
+	}
+	revision "2007-06-08" {
+		description "Initial revision.";
+	}
+
+	grouping dns {
+		list search {
+			key name;
+			max-elements 3;
+			leaf name      { type int32; }
+			leaf domain    { type inet:host; }
+		}
+		list server {
+			key address;
+			max-elements 3;
+			ordered-by user;
+			leaf address   { type inet:ip-address; }
+		}
+		container options {
+			leaf ndots    { type uint8; }
+			leaf timeout  { type uint8; }
+			leaf attempts { type uint8; }
+		}
+	}
+}</code></pre>

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

@@ -195,7 +195,8 @@
 		"xojo": "Xojo (REALbasic)",
 		"xquery": "XQuery",
 		"yaml": "YAML",
-		"yml": "YAML"
+		"yml": "YAML",
+		"yang": "YANG"
 	}/*]*/;
 
 	Prism.plugins.toolbar.registerButton('show-language', function (env) {

tests/languages/yang/boolean_feature.test

@@ -0,0 +1,13 @@
+true
+false
+
+----------------------------------------------------
+
+[
+	["keyword", "true"],
+	["keyword", "false"]
+]
+
+----------------------------------------------------
+
+Checks for booleans.

tests/languages/yang/comment_feature.test

@@ -0,0 +1,15 @@
+// comment
+/*
+ comment
+*/
+
+----------------------------------------------------
+
+[
+	["comment", "// comment"],
+	["comment", "/*\n comment\n*/"]
+]
+
+----------------------------------------------------
+
+Checks for comments.

tests/languages/yang/keyword_feature.test

@@ -0,0 +1,53 @@
+submodule execd-ntp {
+
+	key name;
+
+	leaf stratum { type ntpStratum; default 10; }
+
+	leaf version { type int8 { range "1..4"; } default 4; }
+
+}
+
+----------------------------------------------------
+
+[
+	["keyword", "submodule"],
+	" execd-ntp ",
+	["punctuation", "{"],
+
+	["keyword", "key"],
+	" name",
+	["punctuation", ";"],
+
+	["keyword", "leaf"],
+	" stratum ",
+	["punctuation", "{"],
+	["keyword", "type"],
+	" ntpStratum",
+	["punctuation", ";"],
+	["keyword", "default"],
+	" 10",
+	["punctuation", ";"],
+	["punctuation", "}"],
+
+	["keyword", "leaf"],
+	" version ",
+	["punctuation", "{"],
+	["keyword", "type"],
+	" int8 ",
+	["punctuation", "{"],
+	["keyword", "range"],
+	["string", "\"1..4\""],
+	["punctuation", ";"],
+	["punctuation", "}"],
+	["keyword", "default"],
+	" 4",
+	["punctuation", ";"],
+	["punctuation", "}"],
+
+	["punctuation", "}"]
+]
+
+----------------------------------------------------
+
+Checks for keywords.

tests/languages/yang/namespace_feature.test

@@ -0,0 +1,19 @@
+type foo:type
+type _foo.-bar:type
+
+----------------------------------------------------
+
+[
+	["keyword", "type"],
+	["namespace", "foo"],
+	["punctuation", ":"],
+	"type\n",
+	["keyword", "type"],
+	["namespace", "_foo.-bar"],
+	["punctuation", ":"],
+	"type"
+]
+
+----------------------------------------------------
+
+Checks for namespace prefixes.

tests/languages/yang/string_feature.test

@@ -0,0 +1,19 @@
+"
+
+\"'foo'\"
+
+"
+'fo
+""
+o'
+
+----------------------------------------------------
+
+[
+	["string", "\"\n\n\\\"'foo'\\\"\n\n\""],
+	["string", "'fo\n\"\"\no'"]
+]
+
+----------------------------------------------------
+
+Checks for string.