| 1 | //! wanda inject - Steam launch option wrapper for WeMod injection |
| 2 | //! |
| 3 | //! Usage: Set Steam launch options for a game to: |
| 4 | //! wanda inject %command% |
| 5 | //! |
| 6 | //! This intercepts the game's launch, sets up WeMod in the game's own Proton |
| 7 | //! prefix, and creates a batch file that: |
| 8 | //! - On first run: starts WeMod and keeps the session alive |
| 9 | //! - On subsequent runs (from WeMod's Play button): launches the game directly |
| 10 | //! into the existing Wine session so WeMod can detect and hook it |
| 11 | |
| 12 | use clap::Args; |
| 13 | use std::fs; |
| 14 | use std::io::Write; |
| 15 | use std::os::unix::process::CommandExt; |
| 16 | use std::path::{Path, PathBuf}; |
| 17 | use tracing::{debug, info, warn}; |
| 18 | use wanda_core::{ |
| 19 | config::WandaConfig, |
| 20 | prefix::PrefixBuilder, |
| 21 | steam::{ProtonCompatibility, ProtonVersion}, |
| 22 | Result, WandaError, |
| 23 | }; |
| 24 | |
| 25 | #[derive(Args)] |
| 26 | pub struct InjectArgs { |
| 27 | /// The Steam launch command (%command%) |
| 28 | #[arg(trailing_var_arg = true, allow_hyphen_values = true)] |
| 29 | command: Vec<String>, |
| 30 | } |
| 31 | |
| 32 | /// Log a message to the wanda log file |
| 33 | fn log_to_file(msg: &str) { |
| 34 | let log_path = WandaConfig::default_data_dir().join("wanda.log"); |
| 35 | if let Some(parent) = log_path.parent() { |
| 36 | let _ = fs::create_dir_all(parent); |
| 37 | } |
| 38 | if let Ok(mut file) = fs::OpenOptions::new() |
| 39 | .create(true) |
| 40 | .append(true) |
| 41 | .open(&log_path) |
| 42 | { |
| 43 | let timestamp = std::time::SystemTime::now() |
| 44 | .duration_since(std::time::UNIX_EPOCH) |
| 45 | .map(|d| d.as_secs()) |
| 46 | .unwrap_or(0); |
| 47 | let _ = writeln!(file, "[{}] [inject] {}", timestamp, msg); |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | /// Parsed components of the Steam launch command |
| 52 | struct ParsedCommand { |
| 53 | /// Path to the Proton installation directory |
| 54 | proton_dir: PathBuf, |
| 55 | /// Path to the game executable (Linux path) — Steam's original |
| 56 | game_exe: PathBuf, |
| 57 | /// Path to the real game executable (bypassing EAC launcher if present) |
| 58 | real_game_exe: PathBuf, |
| 59 | /// Index of the game exe in the original args (for replacement) |
| 60 | game_exe_idx: usize, |
| 61 | } |
| 62 | |
| 63 | /// Parse the Steam launch command by finding the Proton script and game exe. |
| 64 | /// |
| 65 | /// Steam's launch pipeline uses multiple `--` separators: |
| 66 | /// ```text |
| 67 | /// steam-launch-wrapper -- reaper SteamLaunch AppId=XXXX -- |
| 68 | /// _v2-entry-point --verb=waitforexitandrun -- |
| 69 | /// proton waitforexitandrun /path/to/game.exe |
| 70 | /// ``` |
| 71 | /// |
| 72 | /// We find the actual `proton` script by scanning for a path whose filename |
| 73 | /// is `proton` and exists on disk, then take the game exe as the arg after |
| 74 | /// the verb. |
| 75 | fn parse_command(raw_args: &[String]) -> Result<ParsedCommand> { |
| 76 | // Find the Proton script: last arg whose filename is "proton" and exists |
| 77 | let proton_idx = raw_args |
| 78 | .iter() |
| 79 | .rposition(|arg| { |
| 80 | let path = Path::new(arg); |
| 81 | path.file_name().map_or(false, |name| name == "proton") |
| 82 | && path.exists() |
| 83 | }) |
| 84 | .ok_or_else(|| WandaError::LaunchFailed { |
| 85 | reason: format!( |
| 86 | "Could not find Proton script in command args: {:?}", |
| 87 | raw_args |
| 88 | ), |
| 89 | })?; |
| 90 | |
| 91 | let proton_exe = PathBuf::from(&raw_args[proton_idx]); |
| 92 | let proton_dir = proton_exe |
| 93 | .parent() |
| 94 | .ok_or_else(|| WandaError::LaunchFailed { |
| 95 | reason: format!( |
| 96 | "Cannot determine Proton directory from: {}", |
| 97 | proton_exe.display() |
| 98 | ), |
| 99 | })? |
| 100 | .to_path_buf(); |
| 101 | |
| 102 | // Verb is the arg after proton (e.g., "waitforexitandrun") |
| 103 | let verb_idx = proton_idx + 1; |
| 104 | if verb_idx >= raw_args.len() { |
| 105 | return Err(WandaError::LaunchFailed { |
| 106 | reason: "No verb found after Proton script".into(), |
| 107 | }); |
| 108 | } |
| 109 | |
| 110 | // Game exe is the arg after the verb |
| 111 | let game_idx = verb_idx + 1; |
| 112 | if game_idx >= raw_args.len() { |
| 113 | return Err(WandaError::LaunchFailed { |
| 114 | reason: "No game executable found after Proton verb".into(), |
| 115 | }); |
| 116 | } |
| 117 | |
| 118 | let game_exe = PathBuf::from(&raw_args[game_idx]); |
| 119 | |
| 120 | // Find the real game exe, bypassing anti-cheat launchers. |
| 121 | // Steam launches `start_protected_game.exe` (EAC) which internally |
| 122 | // starts the real game. WeMod scans for the real exe, not the |
| 123 | // launcher. Look for a sibling exe that isn't an anti-cheat launcher. |
| 124 | let real_game_exe = find_real_game_exe(&game_exe).unwrap_or_else(|| game_exe.clone()); |
| 125 | |
| 126 | Ok(ParsedCommand { |
| 127 | proton_dir, |
| 128 | game_exe, |
| 129 | real_game_exe, |
| 130 | game_exe_idx: game_idx, |
| 131 | }) |
| 132 | } |
| 133 | |
| 134 | /// Find the real game executable, bypassing anti-cheat launchers. |
| 135 | /// |
| 136 | /// When Steam launches `start_protected_game.exe` (EAC) or similar, |
| 137 | /// the real game exe is usually a sibling in the same directory. |
| 138 | /// WeMod scans for the real exe via QueryFullProcessImageName. |
| 139 | fn find_real_game_exe(steam_game_exe: &Path) -> Option<PathBuf> { |
| 140 | let name = steam_game_exe |
| 141 | .file_name()? |
| 142 | .to_string_lossy() |
| 143 | .to_lowercase(); |
| 144 | |
| 145 | // If Steam's exe isn't an anti-cheat launcher, use it directly |
| 146 | let ac_patterns = [ |
| 147 | "start_protected", |
| 148 | "easyanticheat", |
| 149 | "battleye", |
| 150 | "eac_", |
| 151 | ]; |
| 152 | if !ac_patterns.iter().any(|p| name.contains(p)) { |
| 153 | return None; // Already the real exe |
| 154 | } |
| 155 | |
| 156 | let dir = steam_game_exe.parent()?; |
| 157 | let exclude = [ |
| 158 | "start_protected", |
| 159 | "easyanticheat", |
| 160 | "battleye", |
| 161 | "eac_", |
| 162 | "unins", |
| 163 | "crash", |
| 164 | "report", |
| 165 | "redist", |
| 166 | "setup", |
| 167 | "dxsetup", |
| 168 | "vcredist", |
| 169 | "dotnet", |
| 170 | "directx", |
| 171 | "ue4prereq", |
| 172 | "installer", |
| 173 | "updater", |
| 174 | ]; |
| 175 | |
| 176 | // Look for a non-excluded .exe in the same directory |
| 177 | let mut candidates: Vec<PathBuf> = Vec::new(); |
| 178 | if let Ok(entries) = fs::read_dir(dir) { |
| 179 | for entry in entries.flatten() { |
| 180 | let path = entry.path(); |
| 181 | if path.extension().map_or(false, |e| e == "exe") && path.is_file() { |
| 182 | let fname = path |
| 183 | .file_name() |
| 184 | .unwrap_or_default() |
| 185 | .to_string_lossy() |
| 186 | .to_lowercase(); |
| 187 | if !exclude.iter().any(|ex| fname.contains(ex)) { |
| 188 | candidates.push(path); |
| 189 | } |
| 190 | } |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | // Prefer the largest exe (usually the real game, not a small launcher) |
| 195 | candidates.sort_by(|a, b| { |
| 196 | let sa = fs::metadata(a).map(|m| m.len()).unwrap_or(0); |
| 197 | let sb = fs::metadata(b).map(|m| m.len()).unwrap_or(0); |
| 198 | sb.cmp(&sa) |
| 199 | }); |
| 200 | |
| 201 | candidates.into_iter().next() |
| 202 | } |
| 203 | |
| 204 | /// Find the WeMod installation in wanda's default prefix |
| 205 | fn find_wanda_wemod(config: &WandaConfig) -> Result<PathBuf> { |
| 206 | let prefix_base = config.prefix_base_path(); |
| 207 | let default_prefix = prefix_base.join("default"); |
| 208 | |
| 209 | // Check WeMod branding (v11.x) |
| 210 | let wemod_path = |
| 211 | default_prefix.join("pfx/drive_c/users/steamuser/AppData/Local/WeMod"); |
| 212 | if wemod_path.exists() { |
| 213 | return Ok(wemod_path); |
| 214 | } |
| 215 | |
| 216 | // Check Wand branding (v12.x) |
| 217 | let wand_path = |
| 218 | default_prefix.join("pfx/drive_c/users/steamuser/AppData/Local/Wand"); |
| 219 | if wand_path.exists() { |
| 220 | return Ok(wand_path); |
| 221 | } |
| 222 | |
| 223 | Err(WandaError::WemodNotInstalled) |
| 224 | } |
| 225 | |
| 226 | /// Find the real WeMod app exe (not the Squirrel stub) in a WeMod directory. |
| 227 | /// Rejects v12+ which causes black window/renderer crashes under Wine. |
| 228 | fn find_wemod_app_exe(wemod_dir: &Path) -> Option<PathBuf> { |
| 229 | let mut best: Option<(String, PathBuf)> = None; |
| 230 | if let Ok(entries) = fs::read_dir(wemod_dir) { |
| 231 | for entry in entries.flatten() { |
| 232 | let name = entry.file_name().to_string_lossy().to_string(); |
| 233 | if name.starts_with("app-") && entry.path().is_dir() { |
| 234 | // Skip v12+ (black screen under Wine) |
| 235 | let version_part = name.trim_start_matches("app-"); |
| 236 | if let Some(major) = version_part.split('.').next() { |
| 237 | if major.parse::<u32>().unwrap_or(0) >= 12 { |
| 238 | debug!("Skipping incompatible WeMod version: {}", name); |
| 239 | continue; |
| 240 | } |
| 241 | } |
| 242 | let exe = entry.path().join("WeMod.exe"); |
| 243 | if exe.exists() { |
| 244 | if best.as_ref().map_or(true, |(v, _)| name > *v) { |
| 245 | best = Some((name, exe)); |
| 246 | } |
| 247 | } |
| 248 | } |
| 249 | } |
| 250 | } |
| 251 | best.map(|(_, path)| path) |
| 252 | } |
| 253 | |
| 254 | /// Symlink WeMod from wanda's prefix into the game's prefix |
| 255 | fn sync_wemod_to_prefix(wanda_wemod: &Path, compat_data: &Path) -> Result<()> { |
| 256 | let target_local = |
| 257 | compat_data.join("pfx/drive_c/users/steamuser/AppData/Local"); |
| 258 | fs::create_dir_all(&target_local).map_err(|e| WandaError::LaunchFailed { |
| 259 | reason: format!("Failed to create AppData/Local in game prefix: {}", e), |
| 260 | })?; |
| 261 | |
| 262 | let dir_name = wanda_wemod |
| 263 | .file_name() |
| 264 | .unwrap_or_default() |
| 265 | .to_string_lossy() |
| 266 | .to_string(); |
| 267 | let link_path = target_local.join(&dir_name); |
| 268 | |
| 269 | if link_path.exists() { |
| 270 | if link_path.is_symlink() { |
| 271 | debug!("WeMod symlink already exists at {}", link_path.display()); |
| 272 | return Ok(()); |
| 273 | } |
| 274 | // Real directory exists — leave it alone, WeMod may have been installed |
| 275 | // directly into this prefix |
| 276 | debug!( |
| 277 | "WeMod directory already exists (not a symlink) at {}", |
| 278 | link_path.display() |
| 279 | ); |
| 280 | return Ok(()); |
| 281 | } |
| 282 | |
| 283 | info!( |
| 284 | "Symlinking WeMod: {} -> {}", |
| 285 | link_path.display(), |
| 286 | wanda_wemod.display() |
| 287 | ); |
| 288 | log_to_file(&format!( |
| 289 | "Symlinking WeMod: {} -> {}", |
| 290 | link_path.display(), |
| 291 | wanda_wemod.display() |
| 292 | )); |
| 293 | std::os::unix::fs::symlink(wanda_wemod, &link_path).map_err(|e| { |
| 294 | WandaError::LaunchFailed { |
| 295 | reason: format!("Failed to symlink WeMod: {}", e), |
| 296 | } |
| 297 | })?; |
| 298 | |
| 299 | Ok(()) |
| 300 | } |
| 301 | |
| 302 | /// Extract the Steam library root from a game exe path. |
| 303 | /// |
| 304 | /// Game exe is like: `/path/to/steamapps/common/GAME/game.exe` |
| 305 | /// Library root is: `/path/to` |
| 306 | fn library_root_from_game_exe(game_exe: &Path) -> Option<&Path> { |
| 307 | let game_str = game_exe.to_str()?; |
| 308 | let pos = game_str.find("/steamapps/common/")?; |
| 309 | Some(Path::new(&game_str[..pos])) |
| 310 | } |
| 311 | |
| 312 | /// Set up Steam library structure in the game's prefix so WeMod can find games |
| 313 | fn setup_steam_library(compat_data: &Path, game_exe: &Path) -> Result<()> { |
| 314 | let steamapps_dir = |
| 315 | compat_data.join("pfx/drive_c/Program Files (x86)/Steam/steamapps"); |
| 316 | fs::create_dir_all(&steamapps_dir).map_err(|e| WandaError::LaunchFailed { |
| 317 | reason: format!("Failed to create Steam library in prefix: {}", e), |
| 318 | })?; |
| 319 | |
| 320 | let library_root = match library_root_from_game_exe(game_exe) { |
| 321 | Some(root) => root, |
| 322 | None => { |
| 323 | warn!( |
| 324 | "Could not find steamapps/common in game path: {}", |
| 325 | game_exe.display() |
| 326 | ); |
| 327 | return Ok(()); |
| 328 | } |
| 329 | }; |
| 330 | |
| 331 | // Symlink common/ → real steamapps/common/ |
| 332 | let common_link = steamapps_dir.join("common"); |
| 333 | let common_target = library_root.join("steamapps/common"); |
| 334 | if !common_link.exists() { |
| 335 | info!( |
| 336 | "Symlinking Steam common: {} -> {}", |
| 337 | common_link.display(), |
| 338 | common_target.display() |
| 339 | ); |
| 340 | log_to_file(&format!( |
| 341 | "Symlinking common: {} -> {}", |
| 342 | common_link.display(), |
| 343 | common_target.display() |
| 344 | )); |
| 345 | std::os::unix::fs::symlink(&common_target, &common_link).map_err( |
| 346 | |e| WandaError::LaunchFailed { |
| 347 | reason: format!("Failed to symlink common: {}", e), |
| 348 | }, |
| 349 | )?; |
| 350 | } |
| 351 | |
| 352 | // Symlink appmanifest and write libraryfolders.vdf using app ID from env |
| 353 | if let Ok(app_id) = std::env::var("SteamAppId") { |
| 354 | let manifest_name = format!("appmanifest_{}.acf", app_id); |
| 355 | let manifest_target = |
| 356 | library_root.join("steamapps").join(&manifest_name); |
| 357 | let manifest_link = steamapps_dir.join(&manifest_name); |
| 358 | |
| 359 | if !manifest_link.exists() && manifest_target.exists() { |
| 360 | info!("Symlinking appmanifest: {}", manifest_name); |
| 361 | log_to_file(&format!( |
| 362 | "Symlinking appmanifest: {} -> {}", |
| 363 | manifest_link.display(), |
| 364 | manifest_target.display() |
| 365 | )); |
| 366 | std::os::unix::fs::symlink(&manifest_target, &manifest_link) |
| 367 | .map_err(|e| WandaError::LaunchFailed { |
| 368 | reason: format!("Failed to symlink appmanifest: {}", e), |
| 369 | })?; |
| 370 | } |
| 371 | |
| 372 | // Write libraryfolders.vdf so WeMod can discover the game library |
| 373 | let vdf_path = steamapps_dir.join("libraryfolders.vdf"); |
| 374 | let vdf_content = format!( |
| 375 | r#""libraryfolders" |
| 376 | {{ |
| 377 | "0" |
| 378 | {{ |
| 379 | "path" "C:\\Program Files (x86)\\Steam" |
| 380 | "apps" |
| 381 | {{ |
| 382 | "{}" "0" |
| 383 | }} |
| 384 | }} |
| 385 | }}"#, |
| 386 | app_id, |
| 387 | ); |
| 388 | fs::write(&vdf_path, &vdf_content).map_err(|e| { |
| 389 | WandaError::LaunchFailed { |
| 390 | reason: format!("Failed to create libraryfolders.vdf: {}", e), |
| 391 | } |
| 392 | })?; |
| 393 | } |
| 394 | |
| 395 | // Add Steam registry entries |
| 396 | setup_steam_registry(compat_data)?; |
| 397 | |
| 398 | Ok(()) |
| 399 | } |
| 400 | |
| 401 | /// Write Steam registry entries into the game's Wine prefix |
| 402 | fn setup_steam_registry(compat_data: &Path) -> Result<()> { |
| 403 | let user_reg = compat_data.join("pfx/user.reg"); |
| 404 | if !user_reg.exists() { |
| 405 | return Ok(()); |
| 406 | } |
| 407 | |
| 408 | let content = fs::read_to_string(&user_reg).map_err(|e| { |
| 409 | WandaError::LaunchFailed { |
| 410 | reason: format!("Failed to read user.reg: {}", e), |
| 411 | } |
| 412 | })?; |
| 413 | |
| 414 | if content.contains("[Software\\\\Valve\\\\Steam]") { |
| 415 | debug!("Steam registry entries already exist"); |
| 416 | return Ok(()); |
| 417 | } |
| 418 | |
| 419 | let app_id = std::env::var("SteamAppId").unwrap_or_default(); |
| 420 | |
| 421 | let timestamp = std::time::SystemTime::now() |
| 422 | .duration_since(std::time::UNIX_EPOCH) |
| 423 | .map(|d| d.as_secs()) |
| 424 | .unwrap_or(0); |
| 425 | |
| 426 | let steam_entry = format!( |
| 427 | r#" |
| 428 | |
| 429 | [Software\\Valve\\Steam] {ts} |
| 430 | "Language"="english" |
| 431 | "SteamExe"="C:\\\\Program Files (x86)\\\\Steam\\\\steam.exe" |
| 432 | "SteamPath"="C:\\\\Program Files (x86)\\\\Steam" |
| 433 | |
| 434 | [Software\\Valve\\Steam\\Apps\\{app_id}] {ts} |
| 435 | "Installed"=dword:00000001 |
| 436 | "Running"=dword:00000000 |
| 437 | "#, |
| 438 | ts = timestamp, |
| 439 | app_id = app_id, |
| 440 | ); |
| 441 | |
| 442 | info!("Adding Steam registry entries"); |
| 443 | log_to_file("Adding Steam registry entries to game prefix"); |
| 444 | |
| 445 | let mut file = fs::OpenOptions::new() |
| 446 | .append(true) |
| 447 | .open(&user_reg) |
| 448 | .map_err(|e| WandaError::LaunchFailed { |
| 449 | reason: format!("Failed to open user.reg: {}", e), |
| 450 | })?; |
| 451 | file.write_all(steam_entry.as_bytes()).map_err(|e| { |
| 452 | WandaError::LaunchFailed { |
| 453 | reason: format!("Failed to write Steam registry: {}", e), |
| 454 | } |
| 455 | })?; |
| 456 | |
| 457 | Ok(()) |
| 458 | } |
| 459 | |
| 460 | /// Convert a game exe path to its C: drive equivalent through the Steam |
| 461 | /// library symlink set up in the prefix. |
| 462 | /// |
| 463 | /// `/path/to/steamapps/common/GAME/game.exe` |
| 464 | /// → `C:\Program Files (x86)\Steam\steamapps\common\GAME\game.exe` |
| 465 | fn to_c_drive_game_path(game_exe: &Path) -> Option<String> { |
| 466 | let game_str = game_exe.to_string_lossy(); |
| 467 | let pos = game_str.find("/steamapps/common/")?; |
| 468 | let rel_path = &game_str[pos + "/steamapps/common/".len()..]; |
| 469 | Some(format!( |
| 470 | "C:\\Program Files (x86)\\Steam\\steamapps\\common\\{}", |
| 471 | rel_path.replace('/', "\\") |
| 472 | )) |
| 473 | } |
| 474 | |
| 475 | /// Compute the C: drive path for the WeMod exe inside the game's prefix. |
| 476 | /// |
| 477 | /// The WeMod directory is symlinked at: |
| 478 | /// `<prefix>/pfx/drive_c/users/steamuser/AppData/Local/WeMod/` |
| 479 | /// so the Windows path is: |
| 480 | /// `C:\users\steamuser\AppData\Local\WeMod\app-X.Y.Z\WeMod.exe` |
| 481 | fn wemod_c_drive_path( |
| 482 | compat_data: &Path, |
| 483 | wanda_wemod_dir: &Path, |
| 484 | ) -> Option<String> { |
| 485 | let dir_name = wanda_wemod_dir.file_name()?.to_string_lossy(); |
| 486 | let prefix_wemod = compat_data |
| 487 | .join("pfx/drive_c/users/steamuser/AppData/Local") |
| 488 | .join(dir_name.as_ref()); |
| 489 | |
| 490 | // Find the app-X.Y.Z subdirectory (skip v12+ — black screen under Wine) |
| 491 | let mut best: Option<(String, String)> = None; |
| 492 | if let Ok(entries) = fs::read_dir(&prefix_wemod) { |
| 493 | for entry in entries.flatten() { |
| 494 | let name = entry.file_name().to_string_lossy().to_string(); |
| 495 | if name.starts_with("app-") && entry.path().is_dir() { |
| 496 | let version_part = name.trim_start_matches("app-"); |
| 497 | if let Some(major) = version_part.split('.').next() { |
| 498 | if major.parse::<u32>().unwrap_or(0) >= 12 { |
| 499 | continue; |
| 500 | } |
| 501 | } |
| 502 | let exe = entry.path().join("WeMod.exe"); |
| 503 | if exe.exists() { |
| 504 | if best.as_ref().map_or(true, |(v, _)| name > *v) { |
| 505 | best = Some(( |
| 506 | name.clone(), |
| 507 | format!( |
| 508 | "C:\\users\\steamuser\\AppData\\Local\\{}\\{}\\WeMod.exe", |
| 509 | dir_name, name |
| 510 | ), |
| 511 | )); |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | best.map(|(_, path)| path).or_else(|| { |
| 519 | // Fall back to root WeMod.exe |
| 520 | let root = prefix_wemod.join("WeMod.exe"); |
| 521 | if root.exists() { |
| 522 | Some(format!( |
| 523 | "C:\\users\\steamuser\\AppData\\Local\\{}\\WeMod.exe", |
| 524 | dir_name |
| 525 | )) |
| 526 | } else { |
| 527 | None |
| 528 | } |
| 529 | }) |
| 530 | } |
| 531 | |
| 532 | /// Create the main inject batch: starts WeMod, then polls for a signal |
| 533 | /// file that the steam:// protocol proxy creates when WeMod clicks Play. |
| 534 | /// When the signal is detected, launches the game directly in the same |
| 535 | /// Wine session. |
| 536 | fn create_inject_batch( |
| 537 | compat_data: &Path, |
| 538 | wanda_wemod_dir: &Path, |
| 539 | game_exe: &Path, |
| 540 | game_args: &[String], |
| 541 | ) -> Result<PathBuf> { |
| 542 | let batch_path = compat_data.join("wanda_inject.bat"); |
| 543 | |
| 544 | let wemod_win_path = |
| 545 | wemod_c_drive_path(compat_data, wanda_wemod_dir).unwrap_or_else(|| { |
| 546 | let fallback = find_wemod_app_exe(wanda_wemod_dir) |
| 547 | .unwrap_or_else(|| wanda_wemod_dir.join("WeMod.exe")); |
| 548 | format!("Z:{}", fallback.to_string_lossy().replace('/', "\\")) |
| 549 | }); |
| 550 | let game_win_path = to_c_drive_game_path(game_exe).unwrap_or_else(|| { |
| 551 | format!("Z:{}", game_exe.to_string_lossy().replace('/', "\\")) |
| 552 | }); |
| 553 | let game_args_str = game_args.join(" "); |
| 554 | |
| 555 | // Start WeMod and keep the session alive. WeMod calls CreateProcessW |
| 556 | // directly when the user clicks Play — the game starts in the same |
| 557 | // wineserver. We must NOT launch the game ourselves for trainers |
| 558 | // that require WeMod to create the process (suspended + DLL inject). |
| 559 | let batch_content = format!( |
| 560 | r#"@echo off |
| 561 | @title WANDA Inject |
| 562 | echo [WANDA] Starting WeMod... |
| 563 | echo [WANDA] WeMod: {wemod_path} |
| 564 | echo [WANDA] Game: {game_path} |
| 565 | |
| 566 | REM Clear Steam app ID env vars so steamclient.dll inside WeMod does |
| 567 | REM not associate this session with the running game. Without this, |
| 568 | REM WeMod tells Steam "launch game" and Steam says "already running" |
| 569 | REM because our batch IS the running game from Steam's perspective. |
| 570 | set SteamAppId= |
| 571 | set SteamGameId= |
| 572 | set SteamOverlayGameId= |
| 573 | set STEAM_COMPAT_APP_ID= |
| 574 | |
| 575 | start "" "{wemod_path}" --no-sandbox |
| 576 | |
| 577 | echo [WANDA] Waiting for WeMod to initialize... |
| 578 | ping 127.0.0.1 -n 12 > NUL 2>&1 |
| 579 | |
| 580 | echo. |
| 581 | echo [WANDA] WeMod is running. |
| 582 | echo [WANDA] Find your game in WeMod and click Play. |
| 583 | echo [WANDA] WeMod will launch the game directly. |
| 584 | echo [WANDA] Press Stop in Steam to end the session. |
| 585 | echo. |
| 586 | |
| 587 | :keepalive |
| 588 | ping 127.0.0.1 -n 30 > NUL 2>&1 |
| 589 | goto keepalive |
| 590 | "#, |
| 591 | wemod_path = wemod_win_path, |
| 592 | game_path = game_win_path, |
| 593 | ); |
| 594 | |
| 595 | let batch_crlf = batch_content.replace('\n', "\r\n"); |
| 596 | fs::write(&batch_path, &batch_crlf).map_err(|e| { |
| 597 | WandaError::LaunchFailed { |
| 598 | reason: format!("Failed to create inject batch: {}", e), |
| 599 | } |
| 600 | })?; |
| 601 | |
| 602 | log_to_file(&format!( |
| 603 | "Created inject batch at: {}", |
| 604 | batch_path.display() |
| 605 | )); |
| 606 | log_to_file(&format!("WeMod C: path: {}", wemod_win_path)); |
| 607 | log_to_file(&format!("Game C: path: {}", game_win_path)); |
| 608 | |
| 609 | Ok(batch_path) |
| 610 | } |
| 611 | |
| 612 | /// Check if a wineserver is already running for the game's prefix. |
| 613 | /// Uses Proton's wineserver binary with signal 0 (existence check). |
| 614 | fn is_wineserver_running(proton_dir: &Path, compat_data: &Path) -> bool { |
| 615 | let wineserver = proton_dir.join("files/bin/wineserver"); |
| 616 | let prefix = compat_data.join("pfx"); |
| 617 | if !wineserver.exists() { |
| 618 | log_to_file("wineserver binary not found"); |
| 619 | return false; |
| 620 | } |
| 621 | |
| 622 | // Proton's wineserver needs its own libraries |
| 623 | let lib64 = proton_dir.join("files/lib64"); |
| 624 | let lib = proton_dir.join("files/lib"); |
| 625 | let ld_path = format!("{}:{}", lib64.display(), lib.display()); |
| 626 | |
| 627 | let result = std::process::Command::new(&wineserver) |
| 628 | .env("WINEPREFIX", &prefix) |
| 629 | .env("LD_LIBRARY_PATH", &ld_path) |
| 630 | .arg("-k") |
| 631 | .arg("0") |
| 632 | .stdout(std::process::Stdio::null()) |
| 633 | .stderr(std::process::Stdio::null()) |
| 634 | .status(); |
| 635 | |
| 636 | match result { |
| 637 | Ok(status) => { |
| 638 | let running = status.success(); |
| 639 | log_to_file(&format!("wineserver check: running={}", running)); |
| 640 | running |
| 641 | } |
| 642 | Err(e) => { |
| 643 | log_to_file(&format!("wineserver check failed: {}", e)); |
| 644 | false |
| 645 | } |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | /// Set up steam:// protocol proxy so WeMod's Play button launches the |
| 650 | /// game directly inside the Wine session (instead of going through |
| 651 | /// native Steam, which creates a separate Proton session). |
| 652 | fn setup_steam_protocol_proxy( |
| 653 | compat_data: &Path, |
| 654 | game_exe: &Path, |
| 655 | ) -> Result<()> { |
| 656 | let pfx = compat_data.join("pfx"); |
| 657 | |
| 658 | // Create proxy batch at C:\wanda\steam_proxy.bat |
| 659 | // This is triggered when WeMod calls steam://rungameid/<appid>. |
| 660 | // Instead of launching the game directly, it creates a signal file |
| 661 | // that the main inject batch polls for. |
| 662 | let wanda_dir = pfx.join("drive_c/wanda"); |
| 663 | let _ = fs::create_dir_all(&wanda_dir); |
| 664 | let proxy_path = wanda_dir.join("steam_proxy.bat"); |
| 665 | |
| 666 | let proxy_content = r#"@echo off |
| 667 | REM Wanda Steam Protocol Proxy — signals the inject batch to launch the game |
| 668 | echo [WANDA] Steam launch intercepted: %~1 |
| 669 | echo [WANDA] Creating launch signal... |
| 670 | echo launch > C:\wanda\launch_signal |
| 671 | "#; |
| 672 | let proxy_crlf = proxy_content.replace('\n', "\r\n").to_string(); |
| 673 | fs::write(&proxy_path, &proxy_crlf).map_err(|e| WandaError::LaunchFailed { |
| 674 | reason: format!("Failed to create steam proxy: {}", e), |
| 675 | })?; |
| 676 | |
| 677 | // Override steam:// protocol handler in user.reg |
| 678 | let user_reg = pfx.join("user.reg"); |
| 679 | if !user_reg.exists() { |
| 680 | return Ok(()); |
| 681 | } |
| 682 | let content = fs::read_to_string(&user_reg).unwrap_or_default(); |
| 683 | if content.contains("wanda\\\\steam_proxy.bat") { |
| 684 | return Ok(()); |
| 685 | } |
| 686 | |
| 687 | let timestamp = std::time::SystemTime::now() |
| 688 | .duration_since(std::time::UNIX_EPOCH) |
| 689 | .map(|d| d.as_secs()) |
| 690 | .unwrap_or(0); |
| 691 | |
| 692 | let registry = format!( |
| 693 | concat!( |
| 694 | "\n", |
| 695 | "[Software\\\\Classes\\\\steam] {ts}\n", |
| 696 | "@=\"URL:Steam Protocol\"\n", |
| 697 | "\"URL Protocol\"=\"\"\n", |
| 698 | "\n", |
| 699 | "[Software\\\\Classes\\\\steam\\\\shell\\\\open\\\\command] {ts}\n", |
| 700 | "@=\"\\\"C:\\\\wanda\\\\steam_proxy.bat\\\" \\\"%1\\\"\"\n", |
| 701 | ), |
| 702 | ts = timestamp, |
| 703 | ); |
| 704 | |
| 705 | let mut file = fs::OpenOptions::new() |
| 706 | .append(true) |
| 707 | .open(&user_reg) |
| 708 | .map_err(|e| WandaError::LaunchFailed { |
| 709 | reason: format!("Failed to open user.reg: {}", e), |
| 710 | })?; |
| 711 | file.write_all(registry.as_bytes()).map_err(|e| { |
| 712 | WandaError::LaunchFailed { |
| 713 | reason: format!("Failed to write steam:// override: {}", e), |
| 714 | } |
| 715 | })?; |
| 716 | |
| 717 | log_to_file("Set up steam:// protocol proxy in game prefix"); |
| 718 | Ok(()) |
| 719 | } |
| 720 | |
| 721 | pub async fn run(_args: InjectArgs, config_path: Option<PathBuf>) -> Result<()> { |
| 722 | // Log immediately so we can tell if inject was even called |
| 723 | log_to_file("=== WANDA INJECT START ==="); |
| 724 | log_to_file(&format!("PID: {}", std::process::id())); |
| 725 | |
| 726 | // Get raw args from environment to preserve `--` separators |
| 727 | let raw_args: Vec<String> = std::env::args().collect(); |
| 728 | log_to_file(&format!("Raw argv: {:?}", raw_args)); |
| 729 | |
| 730 | let inject_pos = raw_args |
| 731 | .iter() |
| 732 | .position(|a| a == "inject") |
| 733 | .ok_or_else(|| WandaError::LaunchFailed { |
| 734 | reason: "Could not find 'inject' in argv".into(), |
| 735 | })?; |
| 736 | let command_args: Vec<String> = raw_args[inject_pos + 1..].to_vec(); |
| 737 | |
| 738 | log_to_file(&format!("Command args: {:?}", command_args)); |
| 739 | |
| 740 | if command_args.is_empty() { |
| 741 | return Err(WandaError::LaunchFailed { |
| 742 | reason: "No command provided. Usage: wanda inject %command%".into(), |
| 743 | }); |
| 744 | } |
| 745 | |
| 746 | let parsed = parse_command(&command_args)?; |
| 747 | |
| 748 | log_to_file(&format!("Proton dir: {}", parsed.proton_dir.display())); |
| 749 | log_to_file(&format!("Game exe (Steam): {}", parsed.game_exe.display())); |
| 750 | log_to_file(&format!("Game exe (real): {}", parsed.real_game_exe.display())); |
| 751 | log_to_file(&format!( |
| 752 | "Game exe at index {} in command args", |
| 753 | parsed.game_exe_idx |
| 754 | )); |
| 755 | |
| 756 | let compat_data = std::env::var("STEAM_COMPAT_DATA_PATH") |
| 757 | .map(PathBuf::from) |
| 758 | .map_err(|_| WandaError::LaunchFailed { |
| 759 | reason: "STEAM_COMPAT_DATA_PATH not set. \ |
| 760 | Are you running this from Steam launch options?" |
| 761 | .into(), |
| 762 | })?; |
| 763 | |
| 764 | log_to_file(&format!("Compat data path: {}", compat_data.display())); |
| 765 | |
| 766 | // ── Check if WeMod is already running (wineserver active) ────────── |
| 767 | // |
| 768 | // If `wanda launch --standalone` started WeMod in the game's prefix, |
| 769 | // the wineserver is already running. In that case, just pass through |
| 770 | // the original Steam command unmodified — Proton will connect to the |
| 771 | // existing wineserver, and the game will run alongside WeMod. |
| 772 | if is_wineserver_running(&parsed.proton_dir, &compat_data) { |
| 773 | log_to_file("Wineserver active — passthrough mode (WeMod already running)"); |
| 774 | eprintln!("[wanda inject] WeMod session detected — launching game into existing session"); |
| 775 | |
| 776 | let program = &command_args[0]; |
| 777 | let exec_args = &command_args[1..]; |
| 778 | |
| 779 | log_to_file(&format!("Passthrough exec: {} {:?}", program, exec_args)); |
| 780 | |
| 781 | let err = std::process::Command::new(program) |
| 782 | .args(exec_args) |
| 783 | .exec(); |
| 784 | |
| 785 | return Err(WandaError::LaunchFailed { |
| 786 | reason: format!("Failed to exec {}: {}", program, err), |
| 787 | }); |
| 788 | } |
| 789 | |
| 790 | // ── No wineserver: full setup + WeMod launch ─────────────────────── |
| 791 | log_to_file("No active wineserver — full inject mode"); |
| 792 | |
| 793 | let config = match &config_path { |
| 794 | Some(path) => WandaConfig::load_from(path)?, |
| 795 | None => WandaConfig::load()?, |
| 796 | }; |
| 797 | |
| 798 | let wanda_wemod = find_wanda_wemod(&config)?; |
| 799 | log_to_file(&format!("Found WeMod at: {}", wanda_wemod.display())); |
| 800 | |
| 801 | // Setup (all idempotent) |
| 802 | sync_wemod_to_prefix(&wanda_wemod, &compat_data)?; |
| 803 | |
| 804 | let wanda_roaming = { |
| 805 | let prefix_base = config.prefix_base_path(); |
| 806 | prefix_base.join( |
| 807 | "default/pfx/drive_c/users/steamuser/AppData/Roaming/WeMod", |
| 808 | ) |
| 809 | }; |
| 810 | if wanda_roaming.exists() { |
| 811 | let target_roaming = compat_data |
| 812 | .join("pfx/drive_c/users/steamuser/AppData/Roaming"); |
| 813 | let _ = fs::create_dir_all(&target_roaming); |
| 814 | let roaming_link = target_roaming.join("WeMod"); |
| 815 | if !roaming_link.exists() { |
| 816 | let _ = |
| 817 | std::os::unix::fs::symlink(&wanda_roaming, &roaming_link); |
| 818 | } |
| 819 | } |
| 820 | |
| 821 | let proton = ProtonVersion { |
| 822 | name: parsed |
| 823 | .proton_dir |
| 824 | .file_name() |
| 825 | .unwrap_or_default() |
| 826 | .to_string_lossy() |
| 827 | .to_string(), |
| 828 | path: parsed.proton_dir.clone(), |
| 829 | version: (0, 0, 0), |
| 830 | is_ge: false, |
| 831 | is_experimental: false, |
| 832 | compatibility: ProtonCompatibility::Supported, |
| 833 | }; |
| 834 | let builder = PrefixBuilder::new(&compat_data, &proton); |
| 835 | if let Err(e) = builder.patch_mscorlib_version() { |
| 836 | log_to_file(&format!("Warning: mscorlib patch failed: {}", e)); |
| 837 | warn!("mscorlib patch failed (may not be critical): {}", e); |
| 838 | } |
| 839 | |
| 840 | setup_steam_library(&compat_data, &parsed.game_exe)?; |
| 841 | |
| 842 | let game_args = &command_args[parsed.game_exe_idx + 1..]; |
| 843 | let batch_path = create_inject_batch( |
| 844 | &compat_data, |
| 845 | &wanda_wemod, |
| 846 | &parsed.real_game_exe, |
| 847 | game_args, |
| 848 | )?; |
| 849 | |
| 850 | let batch_wine_path = format!("Z:{}", batch_path.to_string_lossy()); |
| 851 | |
| 852 | let mut exec_args: Vec<String> = |
| 853 | command_args[1..parsed.game_exe_idx].to_vec(); |
| 854 | exec_args.push(batch_wine_path.clone()); |
| 855 | |
| 856 | let program = &command_args[0]; |
| 857 | |
| 858 | log_to_file(&format!("Exec: {} {:?}", program, exec_args)); |
| 859 | eprintln!( |
| 860 | "[wanda inject] Starting WeMod session for {} — click Play in WeMod to launch", |
| 861 | parsed.game_exe.file_name().unwrap_or_default().to_string_lossy() |
| 862 | ); |
| 863 | |
| 864 | let err = std::process::Command::new(program) |
| 865 | .args(&exec_args) |
| 866 | .exec(); |
| 867 | |
| 868 | Err(WandaError::LaunchFailed { |
| 869 | reason: format!("Failed to exec {}: {}", program, err), |
| 870 | }) |
| 871 | } |
| 872 |