fix: Flatpak Steam-running detection via named pipe

psutil cannot see host processes from inside the Flatpak sandbox,
so the Steam-running warning never appeared. Now checks for
~/.steam/steam.pipe (FIFO) first, which is visible via the
existing --filesystem=~/.steam:ro permission. Falls back to
psutil for native installations.

Also adds missing Flatpak build deps: pybind11 (Pillow) and six (steam).

Bump to v1.3.7.

Author: HeikesFootSlave

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -12,6 +12,7 @@ body:
     attributes:
       label: SLM Version
       options:
+        - v1.3.7
         - v1.3.6
         - v1.3.5
         - v1.3.4

CHANGELOG.md

@@ -5,6 +5,19 @@ All notable changes to Steam Library Manager will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.3.7] - 2026-04-08
+
+### Fixed
+- **Flatpak: Steam-Running detection:** The Steam-running warning never appeared
+  when running as Flatpak because `psutil.process_iter()` cannot see host
+  processes from inside the sandbox. Now checks for Steam's named pipe
+  (`~/.steam/steam.pipe`) first, which is visible via `--filesystem=~/.steam:ro`.
+  Falls back to psutil for native installations.
+
+### Changed
+- **Flatpak dependencies:** Added missing `pybind11` (Pillow build dependency)
+  and `six` (steam library dependency) to Flatpak manifest.
+
 ## [1.3.6] - 2026-04-05
 
 ### Fixed

flatpak/python3-dependencies.json

@@ -17,6 +17,20 @@
                 }
             ]
         },
+        {
+            "name": "python3-pybind11",
+            "buildsystem": "simple",
+            "build-commands": [
+                "pip3 install --verbose --exists-action=i --no-index --find-links=\"file://${PWD}\" --prefix=${FLATPAK_DEST} \"pybind11\" --no-build-isolation"
+            ],
+            "sources": [
+                {
+                    "type": "file",
+                    "url": "https://files.pythonhosted.org/packages/ab/87/99f21e9b20899d6dc1bf7544cfe53e5fa17acc21bb267971a540425357d3/pybind11-3.0.3-py3-none-any.whl",
+                    "sha256": "fb5f8e4a64946b4dcc0451c83a8c384f803bc0a62dd1ba02f199e97dbc9aad4c"
+                }
+            ]
+        },
         {
             "name": "python3-Pillow",
             "buildsystem": "simple",
@@ -189,6 +203,20 @@
                 }
             ]
         },
+        {
+            "name": "python3-six",
+            "buildsystem": "simple",
+            "build-commands": [
+                "pip3 install --verbose --exists-action=i --no-index --find-links=\"file://${PWD}\" --prefix=${FLATPAK_DEST} \"six\" --no-build-isolation"
+            ],
+            "sources": [
+                {
+                    "type": "file",
+                    "url": "https://files.pythonhosted.org/packages/b7/ce/149a00dd41f10bc29e5921b496af8b574d8413afcd5e30dfa0ed46c2cc5e/six-1.17.0-py2.py3-none-any.whl",
+                    "sha256": "4721f391ed90541fddacab5acf947aa0d3dc7d27b2e1e8eda2be8970586c3274"
+                }
+            ]
+        },
         {
             "name": "python3-steam",
             "buildsystem": "simple",

pyproject.toml

@@ -2,7 +2,7 @@
 
 [project]
 name = "steam-library-manager"
-version = "1.3.6"
+version = "1.3.7"
 description = "A powerful Steam library organizer for Linux - the modern Depressurizer alternative"
 readme = "README.md"
 license = "MIT"

steam_library_manager/main.py

@@ -34,22 +34,45 @@
 __all__ = ["main"]
 
 
-def check_steam_running() -> bool:
-    """Checks if Steam is currently running using psutil."""
+def _check_steam_pipe() -> bool:
+    # steam.pipe (named FIFO) only exists while Steam is running
+    # works inside flatpak sandbox via --filesystem=~/.steam:ro
+    home = Path.home()
+    pipe_paths = [
+        home / ".steam/steam.pipe",
+        home / ".local/share/Steam/steam.pipe",
+        home / ".var/app/com.valvesoftware.Steam/.local/share/Steam/steam.pipe",
+    ]
+    for pp in pipe_paths:
+        if pp.exists() and pp.is_fifo():
+            logger.info("Steam pipe found: %s" % pp)
+            return True
+    return False
+
+
+def _check_steam_psutil() -> bool:
+    # fallback: enumerate processes via psutil (not sandbox-safe)
     try:
         import psutil
 
+        steam_names = {"steam", "steam.exe", "steamwebhelper", "steamwebhelper.exe"}
         for proc in psutil.process_iter(["name"]):
             try:
-                proc_name = proc.info["name"].lower()
-                if proc_name in ["steam", "steam.exe", "steamwebhelper", "steamwebhelper.exe"]:
+                if proc.info["name"].lower() in steam_names:
                     return True
             except (psutil.NoSuchProcess, psutil.AccessDenied):
                 continue
         return False
     except ImportError:
-        logger.warning(t("logs.main.psutil_missing"))
         return False
+
+
+def check_steam_running() -> bool:
+    # named pipe first (sandbox-safe), psutil as fallback
+    try:
+        if _check_steam_pipe():
+            return True
+        return _check_steam_psutil()
     except Exception as e:
         logger.error(t("logs.main.steam_check_error", error=e))
         return False

steam_library_manager/version.py

@@ -11,7 +11,7 @@
 __all__ = ["__app_name__", "__version__", "__release_date__", "__author__", "__license__"]
 
 __app_name__ = "Steam Library Manager"
-__version__ = "1.3.6"
-__release_date__ = "2026-04-05"
+__version__ = "1.3.7"
+__release_date__ = "2026-04-08"
 __author__ = "SwitchBros"
 __license__ = "MIT"