Skip to content

RegEditLinux: Find VRChat install location for registry parsing #1785

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
loucass003 merged 1 commit into from
Apr 16, 2026
Merged

RegEditLinux: Find VRChat install location for registry parsing #1785

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
78 changes: 72 additions & 6 deletions server/desktop/src/main/java/dev/slimevr/desktop/games/vrchat/RegEdit.kt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -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

Expand Down Expand Up @@ -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 {
Expand Down
Loading