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RegEditLinux: Find VRChat install location for registry parsing

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Fixes VRChat config warnings not working when VRChat is installed at
a library location other than the default.
This commit is contained in:
Sapphire
2026-03-12 10:42:34 -05:00
parent 95daec6814
commit c458bcb6fb
1 changed files with 72 additions and 6 deletions
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78
server/desktop/src/main/java/dev/slimevr/desktop/games/vrchat/RegEdit.kt
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@@ -12,6 +12,7 @@ import java.io.FileReader
import java.io.InvalidObjectException
import java.nio.ByteBuffer
import java.nio.ByteOrder
import java.nio.file.Path
import kotlin.io.path.Path
import kotlin.io.path.exists
@@ -142,13 +143,78 @@ class RegEditLinux : AbstractRegEdit() {
}
companion object {
const val USER_REG_SUBPATH = "steamapps/compatdata/438100/pfx/user.reg"
val USER_REG_PATH =
System.getenv("HOME")?.let {
Path(it, ".steam", "root", USER_REG_SUBPATH).let { if (it.exists()) it else null }
?: Path(it, ".steam", "debian-installation", USER_REG_SUBPATH).let { if (it.exists()) it else null }
?: Path(it, ".var", "app", "com.valvesoftware.Steam", "data", "Steam", USER_REG_SUBPATH).let { if (it.exists()) it else null }
private fun findAppLibraryLocation(steamPath: Path, appId: Int): Path? {
val keyValueRegex = Regex(""""(\w+)"[ \t]*(?:"(.+)")?""")
try {
BufferedReader(FileReader(steamPath.resolve("config/libraryfolders.vdf").toFile())).use { reader ->
var depth = 0
var currentLibraryPath: Path? = null
while (reader.ready()) {
val line = reader.readLine().trim()
if (line == "{") {
depth += 1
continue
}
if (line == "}") {
depth -= 1
continue
}
keyValueRegex.matchEntire(line)?.let {
val key = it.groupValues[1]
val value = it.groupValues[2]
when (depth) {
0 -> {
require(key == "libraryfolders") { "root key must be libraryfolders" }
}
1 -> {
// start of a library node
}
2 -> {
// in a library node
if (key == "path") {
currentLibraryPath = Path(value)
} else if (key == "apps") {
// start of apps node
require(currentLibraryPath != null) { "path must come before apps in node" }
}
}
3 -> {
// in apps node
val curAppId = try {
key.toInt()
} catch (_: NumberFormatException) {
null
}
if (curAppId != null && curAppId == appId) {
assert(currentLibraryPath != null)
return currentLibraryPath
}
}
}
}
}
LogManager.warning("[VRChatRegEdit] Couldn't find library folder for appid $appId")
}
} catch (e: Exception) {
LogManager.severe("[VRChatRegEdit] Error parsing Steam libraryfolders", e)
}
return null
}
const val USER_REG_SUBPATH = "steamapps/compatdata/438100/pfx/user.reg"
val STEAM_PATH = System.getenv("HOME")?.let { home ->
Path(home, ".steam", "root").takeIf { it.exists() }
?: Path(home, ".steam", "debian-installation").takeIf { it.exists() }
?: Path(home, ".var", "app", "com.valvesoftware.Steam", "data", "Steam").takeIf { it.exists() }
}
val USER_REG_PATH: Path? = if (STEAM_PATH != null) findAppLibraryLocation(STEAM_PATH, 438100)?.resolve(USER_REG_SUBPATH) else null
val KEY_VALUE_PATTERN = Regex(""""(.+)"=(.+)""")
val HEX_FORMAT = HexFormat {