I got it.
I patched in is_nixos function that checks /etc/os-release in runtime. This way builds for nixos and non-nixos are the same.
Now if the app finds itself on nixos:
- it uses
HWDATA_PATH env-var instead of previously hardcoded /usr/share/hwdata/. HWDATA_PATH is set by wrapper.
- it uses
/run/current-system/sw/share/applications and /run/current-system/sw/lib/systemd/system (/run/current-system/sw/ seems consistent enough to hard-code it in)
This fixed “Network”, “GPU” and “Processes” tabs.
“Services” remains broken. It ignores symlinked .service files for some reason. Even flatpak version didn’t show services when installed on nixos.
Anyway, I don’t need this tab too much.
Thank you guys for your advise!
Working package:
nixpkgs: c3d4ac725177c030b1e289015989da2ad9d56af0
default.nix:
{
pkgs,
stdenv,
fetchFromGitHub,
python3Packages,
gobject-introspection,
desktop-file-utils,
gettext,
glib,
gtk4,
libadwaita,
meson,
ninja,
pkg-config,
wrapGAppsHook4,
cairo,
hwdata,
}:
let
pp = python3Packages;
in
pp.buildPythonApplication {
pname = "system-monitoring-center";
version = "v2.26.0";
src = fetchFromGitHub {
# https://github.com/hakandundar34coding/system-monitoring-center/tree/4d9424833bd36cfd4fe7521139fe57faf9ee626b
owner = "hakandundar34coding";
repo = "system-monitoring-center";
rev = "4d9424833bd36cfd4fe7521139fe57faf9ee626b";
hash = "sha256-HSzQ13Y+KV8J7lzUZ4L+6NNQUIHkgF4SxPpHIKCHwt8=";
};
patches = [
./1.patch
];
pyproject = false; # Build with meson
nativeBuildInputs = [
meson
ninja
pkg-config
wrapGAppsHook4
desktop-file-utils
gobject-introspection
gettext
];
buildInputs = [
glib
gtk4
libadwaita
cairo
];
propagatedBuildInputs = [
pp.pygobject3
];
dontWrapGApps = true;
preFixup = ''
makeWrapperArgs+=(--set HWDATA_PATH "${hwdata}/share/hwdata/")
makeWrapperArgs+=("''${gappsWrapperArgs[@]}")
'';
}
1.patch:
commit 5d4c39d71288296f0800da409a4c1eab2b9670da
Author: borisoid <boris.lazarev90@mail.ru>
Date: Sat Aug 24 14:22:26 2024 +0300
Patch for NixOS
diff --git a/src/Libsysmon.py b/src/Libsysmon.py
index e2a91b0..288101c 100644
--- a/src/Libsysmon.py
+++ b/src/Libsysmon.py
@@ -5,6 +5,7 @@ import platform
import time
from datetime import datetime
import threading
+import functools
# ***********************************************************************************************
@@ -146,6 +147,12 @@ def get_environment_type():
return environment_type
+@functools.cache
+def is_nixos() -> bool:
+ with open("/etc/os-release") as reader:
+ return "ID=nixos" in reader.read().strip().split("\n")
+
+
def get_init_system():
"""
Get init system of the OS. Currently it is detected as "systemd" or "other".
@@ -264,6 +271,8 @@ def get_device_vendor_model(modalias_output):
# Define hardware database file directories.
udev_database = "no"
pci_usb_hardware_database_dir = "/usr/share/hwdata/"
+ if is_nixos():
+ pci_usb_hardware_database_dir = os.getenv("HWDATA_PATH", pci_usb_hardware_database_dir)
if environment_type == "flatpak":
pci_usb_hardware_database_dir = "/app/share/hwdata/"
sdio_hardware_database_dir = os.path.dirname(os.path.realpath(__file__)) + "/../database/"
@@ -4083,14 +4092,15 @@ def get_application_name_image_dict():
application_image_dict = {}
# Get ".desktop" file names
- application_file_list = [file for file in os.listdir("/usr/share/applications/") if file.endswith(".desktop")]
+ applications_dir = "/usr/share/applications/" if not is_nixos() else "/run/current-system/sw/share/applications/"
+ application_file_list = [file for file in os.listdir(applications_dir) if file.endswith(".desktop")]
# Get application name and image information
for application in application_file_list:
# "encoding="utf-8"" is used for preventing "UnicodeDecodeError" errors during reading the file content if "C" locale is used.
try:
- with open("/usr/share/applications/" + application, encoding="utf-8") as reader:
+ with open(applications_dir + application, encoding="utf-8") as reader:
application_file_content = reader.read()
except (PermissionError, FileNotFoundError) as e:
continue
@@ -4520,6 +4530,9 @@ def get_services_information():
for file in service_unit_file_list_lib_systemd_scratch:
if file.endswith(".service") == True:
service_unit_file_list_lib_systemd.append(file)
+ elif is_nixos():
+ service_unit_files_dir = "/run/current-system/sw/lib/systemd/system/"
+ service_unit_file_list_usr_lib_systemd = [filename for filename in os.listdir(service_unit_files_dir) if filename.endswith(".service")]
else:
if os.path.isdir("/usr/lib/systemd/system/") == True:
service_unit_files_dir = "/usr/lib/systemd/system/"
I see the exact places these paths are read.