proton: Make log directory configurable via PROTON_LOG_DIR

3 files changed, 7 insertions, 3 deletions

diff --git a/README.md b/README.md
index 0a2d57b5..7ba6b3d0 100644
--- a/README.md
+++ b/README.md
@@ -264,7 +264,8 @@ the Wine prefix. Removing the option will revert to the previous behavior.
 
 | Compat config string  | Environment Variable           | Description  |
 | :-------------------- | :----------------------------- | :----------- |
-|                       | <tt>PROTON_LOG</tt>            | Convenience method for dumping a useful debug log to `$HOME/steam-$APPID.log`. For more thorough logging, use `user_settings.py`. |
+|                       | <tt>PROTON_LOG</tt>            | Convenience method for dumping a useful debug log to `$PROTON_LOG_DIR/steam-$APPID.log` For more thorough logging, use `user_settings.py`. |
+|                       | <tt>PROTON_LOG_DIR</tt>        | Output log files into the directory specified. Defaults to your home directory. |
 |                       | <tt>PROTON_DUMP_DEBUG_COMMANDS</tt> | When running a game, Proton will write some useful debug scripts for that game into `$PROTON_DEBUG_DIR/proton_$USER/`. |
 |                       | <tt>PROTON_DEBUG_DIR</tt>      | Root directory for the Proton debug scripts, `/tmp` by default. |
 | <tt>wined3d</tt>      | <tt>PROTON_USE_WINED3D</tt>    | Use OpenGL-based wined3d instead of Vulkan-based DXVK for d3d11, d3d10, and d3d9. |
diff --git a/proton b/proton
index ba6cb966..13dae363 100755
--- a/proton
+++ b/proton
@@ -703,7 +703,9 @@ class Session:
 
         if "SteamGameId" in self.env:
             if self.env["WINEDEBUG"] != "-all":
-                lfile_path = os.environ["HOME"] + "/steam-" + os.environ["SteamGameId"] + ".log"
+                basedir = self.env.get("PROTON_LOG_DIR", os.environ["HOME"])
+                makedirs(basedir)
+                lfile_path = basedir + "/steam-" + os.environ["SteamGameId"] + ".log"
                 if os.path.exists(lfile_path):
                     os.remove(lfile_path)
                 self.log_file = open(lfile_path, "w+")
diff --git a/user_settings.sample.py b/user_settings.sample.py
index 874c3fe5..fdb9c30c 100755
--- a/user_settings.sample.py
+++ b/user_settings.sample.py
@@ -3,7 +3,8 @@
 #Settings here will take effect for all games run in this Proton version.
 
 user_settings = {
-    #Logs are saved to $HOME/steam-<STEAM_GAME_ID>.log, overwriting any previous log with that name.
+    #By default, logs are saved to $HOME/steam-<STEAM_GAME_ID>.log, overwriting any previous log with that name.
+    #Log directory can be overridden with $PROTON_LOG_DIR.
 
     #Wine debug logging
     "WINEDEBUG": "+timestamp,+pid,+tid,+seh,+debugstr,+loaddll,+mscoree",