Fix/linux custom install location

package.json

@@ -32,6 +32,7 @@
   },
   "dependencies": {
     "tail": "^2.2.6",
+    "vdf-parser": "^1.2.1",
     "vrchat-location-parser": "^0.2.0"
   }
 }

src/index.ts

@@ -81,7 +81,13 @@ export class VrchatLogWatcher extends EventEmitter {
 
   constructor() {
     super()
-    this.vrchatLogDir = getVrchatLogDir()
+
+    const logdir = getVrchatLogDir()
+    // throw error when log dir is missing
+    if (!logdir) {
+      throw Error('VRChat log dir missing')
+    }
+    this.vrchatLogDir = logdir
     // start logging on init
     this.currentLogFile = getLatestLogfile(this.vrchatLogDir)
     this.watchFile()

src/interfaces/SteamLibraryFolders.d.ts

@@ -0,0 +1,13 @@
+export interface SteamLibraryFolders {
+  libraryfolders: { [key: string]: LibraryFolder }
+}
+
+export interface LibraryFolder {
+  path: string
+  label: string
+  contentid: number
+  totalsize: number
+  update_clean_bytes_tally: number
+  time_last_update_verified: number
+  apps: { [key: string]: number }
+}

src/utils/getVrchatLogDir.ts

@@ -1,24 +1,75 @@
 import * as path from 'path'
 import * as os from 'os'
+import * as VDF from 'vdf-parser'
+import * as fs from 'fs'
+import { SteamLibraryFolders } from '../interfaces/SteamLibraryFolders'
+
+// https://steamdb.info/app/438100
+const VRCHAT_APP_ID = '438100'
+
+const returnPathIfExists = (path2Check: string) =>
+  fs.existsSync(path2Check) ? path2Check : null
 
 export const getVrchatLogDir = () => {
   // windows
-  if (process.platform == 'win32')
-    return path.join(os.homedir(), 'Appdata', 'LocalLow', 'VRChat', 'VRChat')
-  return path.join(
-    os.homedir(),
-    '.steam',
-    'steam',
-    'steamapps',
-    'compatdata',
-    '438100',
-    'pfx',
-    'drive_c',
-    'users',
-    'steamuser',
-    'AppData',
-    'LocalLow',
-    'VRChat',
-    'VRChat',
-  )
+  if (process.platform == 'win32') {
+    return returnPathIfExists(
+      path.join(os.homedir(), 'Appdata', 'LocalLow', 'VRChat', 'VRChat'),
+    )
+  }
+
+  // linux
+  if (process.platform == 'linux') {
+    // path of libraryfolders.vdf
+    const libraryFoldersPath = path.join(
+      os.homedir(),
+      '.steam',
+      'steam',
+      'steamapps',
+      'libraryfolders.vdf',
+    )
+
+    // return if file is non existant
+    if (!fs.existsSync(libraryFoldersPath)) {
+      return null
+    }
+
+    // read and parse file
+    const libraryFoldersText = fs.readFileSync(libraryFoldersPath).toString()
+    const libraryFoldersConfig =
+      VDF.parse<SteamLibraryFolders>(libraryFoldersText)
+
+    console.log(libraryFoldersConfig.libraryfolders)
+
+    // find library with vrchat
+    const library = Object.values(libraryFoldersConfig.libraryfolders).findLast(
+      (library) =>
+        // returns app id or undefined
+        Object.keys(library.apps).findLast((appId) => appId == VRCHAT_APP_ID),
+    )
+
+    // check if library with VRChat is existent
+    if (!library?.path) {
+      return null
+    }
+
+    return returnPathIfExists(
+      path.join(
+        library.path,
+        'steamapps',
+        'compatdata',
+        '438100',
+        'pfx',
+        'drive_c',
+        'users',
+        'steamuser',
+        'AppData',
+        'LocalLow',
+        'VRChat',
+        'VRChat',
+      ),
+    )
+  }
+
+  return null
 }

tsconfig.json

@@ -5,6 +5,7 @@
     "declaration": true,
     "module": "nodenext",
     "moduleResolution": "nodenext",
+    "types": ["node"],
     "target": "ESNext",
     "strict": true
   },