desktop: add COSMIC Epoch DE

- Introduce COSMIC as a new compositor option for Ghaf desktop
- Add COSMIC nix config
- Add Ghaf COSMIC config as a YAML file
- Replace some desktop utilities with COSMIC equivalents (file manager, terminal, etc.)
- Add vm names as prefixes for apps launched through waypipe
- Adjust suspend behavior for ghaf-powercontrol

Signed-off-by: Kajus Naujokaitis <kajus.naujokaitis@unikie.com>

Author: kajusnau

modules/common/services/disks.nix

@@ -48,6 +48,12 @@ in
         # Command to be executed on any device event
         # event_hook = "";
       };
+      device_config = [
+        {
+          device_file = "/dev/loop*";
+          ignore = true;
+        }
+      ];
       quickmenu_actions = [
         "browse"
         "mount"
@@ -72,9 +78,12 @@ in
         RestartSec = "1";
         ExecStart = "${pkgs.udiskie}/bin/udiskie -c /etc/udiskie.yml";
       };
-      wantedBy = [ "ewwbar.service" ];
-      after = [ "ewwbar.service" ];
-      partOf = [ "ewwbar.service" ];
+      wantedBy = [ "ghaf-session.target" ];
+      after = [
+        "ghaf-session.target"
+        "ewwbar.service"
+      ];
+      partOf = [ "ghaf-session.target" ];
     };
   };
 }

modules/desktop/graphics/cosmic/config/cosmic-config-to-yaml.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+# Copyright 2022-2025 TII (SSRC) and the Ghaf contributors
+# SPDX-License-Identifier: Apache-2.0
+
+# This script generates a YAML file from the Cosmic config file tree in the specified directory
+
+if [ -z "$1" ]; then
+    echo "Usage: $0 <source_directory>"
+    exit 1
+fi
+
+OUTPUT_FILE="cosmic.config.yaml"
+BASE_DIR="$1"
+
+echo "" > "$OUTPUT_FILE"
+
+# Iterate over top-level directories
+for dir in "$BASE_DIR"/*/; do
+    # Get the top-level directory name
+    dir_name=$(basename "$dir")
+    echo "$dir_name:" >> "$OUTPUT_FILE"
+    
+    # Iterate over files in the v1 subdirectory
+    for file in "$dir"v1/*; do
+        if [[ -f "$file" ]]; then
+            key=$(basename "$file")
+            value=$(cat "$file")
+            
+            # Format the value correctly
+            if [[ "$value" == *$'\n'* ]]; then
+                echo "  $key: |" >> "$OUTPUT_FILE"
+                while IFS= read -r line; do
+                    echo "    $line" >> "$OUTPUT_FILE"
+                done <<< "$value"
+            else
+                echo "  $key: $value" >> "$OUTPUT_FILE"
+            fi
+        fi
+    done
+    echo "" >> "$OUTPUT_FILE"
+done
+
+echo "Cosmic config YAML generated at $OUTPUT_FILE"

modules/desktop/graphics/cosmic/config/cosmic-config.nix

@@ -0,0 +1,58 @@
+# Copyright 2022-2025 TII (SSRC) and the Ghaf contributors
+# SPDX-License-Identifier: Apache-2.0
+{
+  lib,
+  pkgs,
+  ...
+}:
+
+pkgs.stdenv.mkDerivation rec {
+  pname = "ghaf-cosmic-config";
+  version = "0.1";
+
+  phases = [
+    "unpackPhase"
+    "installPhase"
+    "postInstall"
+  ];
+
+  src = ./.;
+
+  nativeBuildInputs = [ pkgs.yq-go ];
+
+  unpackPhase = ''
+    mkdir -p cosmic-unpacked
+
+    # Process the YAML configuration
+    for entry in $(yq e 'keys | .[]' $src/cosmic-config.yaml); do
+      mkdir -p "cosmic-unpacked/$entry/v1"
+
+      for subentry in $(yq e ".\"$entry\" | keys | .[]" "$src/cosmic-config.yaml"); do
+        content=$(yq e --unwrapScalar=false ".\"$entry\".\"$subentry\"" $src/cosmic-config.yaml | grep -vE '^\s*\|')
+        echo -ne "$content" > "cosmic-unpacked/$entry/v1/$subentry"
+      done
+    done
+  '';
+
+  installPhase = ''
+    mkdir -p $out/share/cosmic
+    cp -rf cosmic-unpacked/* $out/share/cosmic/
+    rm -rf cosmic-unpacked
+  '';
+
+  postInstall = ''
+    substituteInPlace $out/share/cosmic/com.system76.CosmicBackground/v1/all \
+    --replace-fail "None" "Path(\"${pkgs.ghaf-artwork}/ghaf-desert-sunset.jpg\")"
+    substituteInPlace $out/share/cosmic/com.system76.CosmicSettings.Shortcuts/v1/system_actions \
+    --replace-fail 'VolumeLower: ""' 'VolumeLower: "pamixer --unmute --decrease 5 && ${pkgs.pulseaudio}/bin/paplay ${pkgs.sound-theme-freedesktop}/share/sounds/freedesktop/stereo/audio-volume-change.oga"' \
+    --replace-fail 'VolumeRaise: ""' 'VolumeRaise: "pamixer --unmute --increase 5 && ${pkgs.pulseaudio}/bin/paplay ${pkgs.sound-theme-freedesktop}/share/sounds/freedesktop/stereo/audio-volume-change.oga"'
+  '';
+
+  meta = with lib; {
+    description = "Installs default Ghaf COSMIC configuration";
+    platforms = [
+      "aarch64-linux"
+      "x86_64-linux"
+    ];
+  };
+}