add hlds vs code syntax highlighting

etc/hlds/.vscodeignore

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+.vscode/**
+.vscode-test/**
+.gitignore
+vsc-extension-quickstart.md

etc/hlds/CHANGELOG.md

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+# Change Log
+
+All notable changes to the "hlds" extension will be documented in this file.
+
+Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
+
+## [Unreleased]
+
+- Initial release

etc/hlds/README.md

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+# hlds
+
+Working on haldis? Thanks! This extension will hihghlight the `.hlds` files, maybe a bit sillyly but hey, it's something.
+
+### For more information
+
+* [Visual Studio Code's Markdown Support](http://code.visualstudio.com/docs/languages/markdown)
+* [Markdown Syntax Reference](https://help.github.com/articles/markdown-basics/)
+
+**Enjoy!**

etc/hlds/language-configuration.json

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+{
+    "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 can be used to surround a selection
+    "surroundingPairs": [
+        ["{", "}"],
+        ["[", "]"],
+        ["(", ")"],
+        ["\"", "\""],
+        ["'", "'"]
+    ]
+}

etc/hlds/package.json

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+{
+    "name": "hlds",
+    "publisher": "Silvius",
+    "displayName": "Syntax highlighting for haldis (hlds) files.",
+    "description": "hlds",
+    "repository": "https://git.zeus.gent/midgard/haldis",
+    "version": "0.0.1",
+    "engines": {
+        "vscode": "^1.42.0"
+    },
+    "categories": [
+        "Programming Languages"
+    ],
+    "contributes": {
+        "languages": [{
+            "id": "hlds",
+            "aliases": ["HLDS", "hlds"],
+            "extensions": [".hlds"],
+            "configuration": "./language-configuration.json"
+        }],
+        "grammars": [{
+            "language": "hlds",
+            "scopeName": "source.hlds",
+            "path": "./syntaxes/hlds.tmLanguage.json"
+        }, {
+            "path": "./syntaxes/injections.json",
+            "scopeName": "comment.injection",
+            "injectTo": ["source.hlds"]
+        }]
+    }
+}

etc/hlds/syntaxes/hlds.tmLanguage.json

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+{
+	"$schema": "https://raw.githubusercontent.com/martinring/tmlanguage/master/tmlanguage.json",
+	"name": "HLDS",
+	"patterns": [
+		{
+			"include": "#tags"
+		},
+		{
+			"include": "#keywords"
+		},
+		{
+			"include": "#header"
+		},
+		{
+			"include": "#prices"
+		},
+		{
+			"include": "#indent"
+		},
+		{
+			"include": "#random"
+		}
+	],
+	"repository": {
+		"random": {
+			"patterns": [
+				{
+					"match": "#.*$",
+					"name": "markup.bold"
+				}
+			]	
+		},
+		"tags": {
+			"patterns": [
+				{
+					"match": "(::)\\s*({[a-zA-Z-_]*}\\s*)*",
+					"name": "markup.italic",
+					"captures": {
+						"1": {
+							"name": "markup.bold"
+						}
+					}
+				}
+			]
+		},
+		"indent": {
+			"patterns": [
+				{
+					"name": "variable.other",
+					"match": "\\t[-_a-zA-Z0-9]*:"
+				},
+				{
+					"name": "entity.name.type",
+					"match": "[-_a-zA-Z0-9]*:"
+				}
+			]
+		},
+		"prices": {
+			"patterns": [
+				{
+					"name": "entity.name.class",
+					"match": "€\\s*[0-9.]*$"
+				}
+			]
+		},
+		"header": {
+			"patterns": [
+				{
+					"name": "embedded.meta.tag",
+					"begin": "^==",
+					"end": "==$"
+				}
+			]
+		},
+		"comments": {
+			"patterns": [
+				{
+					"name": "comment",
+					"match": "--[^€]*"
+				}
+			]
+		},
+		"keywords": {
+			"patterns": [
+				{
+					"name": "keyword.control.hlds",
+					"match": "\\bdish\\b"
+				},
+				{
+					"name": "keyword",
+					"match": "\\b(single_choice|multi_choice)\\b"
+				}
+			]
+		}
+	},
+	"scopeName": "source.hlds"
+}

etc/hlds/syntaxes/injections.json

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+{
+    "scopeName": "comment.injection",
+    "injectionSelector": "L:embedded.meta.tag",
+    "patterns": [
+        {
+            "include": "#comment"
+        },
+        {
+            "include": "#header"
+        },
+        {
+            "include": "#links"
+        },
+        {
+            "include": "#brackets"
+        }
+    ],
+    "repository": {
+        "comment": {
+            "match": "#.*$",
+            "name": "comment"
+        },
+        "header": {
+            "match": "^[a-zA-Z0-9_].*$",
+            "name": "keyword.todo"
+        },
+        "links": {
+            "match": "^\\t[a-zA-Z0-9-_]*",
+            "name": "keyword.todo"
+        },
+        "brackets": {
+            "match": "=",
+            "name": "variable.other"
+        }
+    }
+}

etc/hlds/vsc-extension-quickstart.md

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+# Welcome to your VS Code Extension
+
+## What's in the folder
+
+* This folder contains all of the files necessary for your extension.
+* `package.json` - this is the manifest file in which you declare your language support and define the location of the grammar file that has been copied into your extension.
+* `syntaxes/hlds.tmLanguage.json` - this is the Text mate grammar file that is used for tokenization.
+* `language-configuration.json` - this is the language configuration, defining the tokens that are used for comments and brackets.
+
+## Get up and running straight away
+
+* Make sure the language configuration settings in `language-configuration.json` are accurate.
+* Press `F5` to open a new window with your extension loaded.
+* Create a new file with a file name suffix matching your language.
+* Verify that syntax highlighting works and that the language configuration settings are working.
+
+## Make changes
+
+* You can relaunch the extension from the debug toolbar after making changes to the files listed above.
+* You can also reload (`Ctrl+R` or `Cmd+R` on Mac) the VS Code window with your extension to load your changes.
+
+## Add more language features
+
+* To add features such as intellisense, hovers and validators check out the VS Code extenders documentation at https://code.visualstudio.com/docs
+
+## Install your extension
+
+* To start using your extension with Visual Studio Code copy it into the `<user home>/.vscode/extensions` folder and restart Code.
+* To share your extension with the world, read on https://code.visualstudio.com/docs about publishing an extension.