[Xpano on NixOS] #nix #flatpak

readme.md

Install from nixpkgs

https://search.nixos.org/packages?channel=unstable&show=xpano

Running a self built binary

When crashing with this error:

(Xpano:7068): GLib-GIO-ERROR **: 16:40:35.251: No GSettings schemas are installed on the system

Workaround 1) (from here):

mkdir -p ~/.local/share/glib-2.0/schemas
cp -pi /nix/store/...-gtk+3-3.<LATEST>/share/gsettings-schemas/gtk+3-3.*/glib-2.0/schemas/gschemas.compiled ~/.local/share/glib-2.0/schemas/

Workaround 2) add this to home-manager:

xdg = {
    enable = true;
    systemDirs.data = [
      "${pkgs.gtk3}/share/gsettings-schemas/${pkgs.gtk3.name}"
      "${pkgs.gsettings-desktop-schemas}/share/gsettings-schemas/${pkgs.gsettings-desktop-schemas.name}"
    ];
};

Running from Flatpak

Possible errors:

1. App crashes when there is a mouse cursor event (e.g. when moving the mouse on the edge of a resizable panel)
2. Small mouse cursor when using display scaling

Solution (discourse, NixOSWiki):

ln -s /run/current-system/sw/share/icons ~/.local/share/icons

Add the following dirs to the filesystem permissions with Flatseal:

~/.local/share/icons:ro
/nix/store:ro

settings.json

{
    "breadcrumbs.enabled": false,
    "cmake.configureOnOpen": true,
    "cmake.statusbar.visibility": "compact",

    "cmake.buildDirectory": "${workspaceFolder}/build",
    "cmake.configureArgs": [
        "-Dexiv2_DIR:PATH=${workspaceFolder}/exiv2/install/lib64/cmake/exiv2",
        "-DCMAKE_INSTALL_PREFIX:PATH=install",
        "-DBUILD_TESTING:BOOL=ON",
        "-DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=ON"
    ],

    "cmake.generator": "Ninja",
    "clangd.arguments": [
        "--background-index",
        "--clang-tidy",
        "--compile-commands-dir=build"
    ]
}

shell.nix

{ pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/8df7a67abaf8aefc8a2839e0b48f92fdcf69a38b.tar.gz") {} }:

pkgs.mkShell {
  buildInputs = (with pkgs; [
    git
    cmake
    pkg-config
    ninja
    clang-tools_16
    gcc13
  ]) ++ (with pkgs; [
    opencv
    SDL2
    gtk3
    catch2_3
    spdlog
  ]);
}