keyvalues

A zero-dependency library for Parsing Valve KeyValue format data.

Go library for parsing Valve keyvalue format files. This library constructs a simple kv node tree that you can query any structure(s) and any property(s) of.

It has been tested against various gameinfo.txt engine files, but should work with other KeyValue files as well (such as .vmf or .vmt).

It is important to note that KeyValue's appear to support (in certain rare uses of the format) multiple root nodes in a single definition. This package will create a root node with Key $root in this situation, with all root nodes as children. If there is only a single root node, the root node will be as defined in the KeyValues.

Usage

package main

import (
    "log"
    "os"
    "github.com/galaco/keyvalues"
)

func main() {
	file,_ := os.Open("gameinfo.txt")

	reader := keyvalues.NewReader(file)
	kv,_ := reader.Read()

    // counterstrike: source's gameinfo.txt would return "Counter-Strike Source"
    gameInfoNode,_ := kv.Find("GameInfo")
    gameNode,_ := gameInfoNode.Find("game")
    log.Println(gameNode.AsString())

    // counterstrike: source's gameinfo.txt would return 1
    noModelsNode,_ := gameInfoNode.Find("nomodels")
    log.Println(noModelsNode.AsInt())

    // counterstrike: source's gameinfo.txt would return 240
    fileSystemNode,_ := gameInfoNode.Find("FileSystem")
    appIdNode,_ := fileSystemNode.Find("SteamAppId")
    log.Println(appIdNode.AsInt())
}

Todo

• Implement multi-line values. At present, a \n character in a quoted value will break the parser. This is how CS:GO Hammer behaves. However, other versions of Hammer support this, as well as all engine versions. Worth noting what spec is available doesn't cover this behaviour.
• Implement pointer value type (unsure if there is any point to this besides matching spec)
• Proper test coverage