First commit

OLD CONFIGS/nix_new/hosts/traveldroid/wallpaper-rotator.nix

@@ -0,0 +1,226 @@
+{ config, pkgs, lib, ... }:
+
+let
+  cfg = config.dataPro.wallpaper; # custom namespace
+
+  # Where we keep a runtime-editable config for the user.
+  runtimeConfDir = "${config.xdg.configHome}/wallpaper";
+  runtimeConfPath = "${runtimeConfDir}/wallpaper.conf";
+
+  rotateScript = pkgs.writeShellScript "wallpaper-rotate" ''
+    set -euo pipefail
+
+    export PATH=${lib.makeBinPath [
+      pkgs.coreutils
+      pkgs.findutils
+      pkgs.gnugrep
+      pkgs.gawk
+      pkgs.util-linux
+      pkgs.swww
+    ]}
+
+    # Defaults (can be overridden by wallpaper.conf)
+    SOURCE_DIR="${cfg.sourceDir}"
+    TARGET_DIR="${cfg.targetDir}"
+    ROTATION_DIR="${cfg.rotationDir}"
+    TRANSITION_TYPE="fade"
+    TRANSITION_DURATION="2.5"
+    TRANSITION_FPS="60"
+    PICK_MODE="random"   # random | sequential
+    LAST_FILE="${config.xdg.stateHome}/wallpaper/last.txt"
+
+    # Load user config if present (KEY=VALUE lines; '#' comments allowed)
+    if [ -f "${runtimeConfPath}" ]; then
+      # shellcheck disable=SC1090
+      . "${runtimeConfPath}"
+    fi
+
+    mkdir -p "$TARGET_DIR" "${config.xdg.stateHome}/wallpaper"
+
+    # Ensure swww-daemon is running
+    if ! pgrep -x swww-daemon >/dev/null 2>&1; then
+      swww-daemon >/dev/null 2>&1 &
+      sleep 0.3
+    fi
+
+    # Pick image
+    if [ ! -d "$ROTATION_DIR" ]; then
+      echo "Rotation directory does not exist: $ROTATION_DIR" >&2
+      exit 0
+    fi
+
+    # Build list once per run
+    mapfile -d '' -t imgs < <(
+      find "$ROTATION_DIR" -type f \
+        \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' -o -iname '*.webp' \) \
+        -print0
+    )
+
+    if [ "${#imgs[@]}" -eq 0 ]; then
+      echo "No images found in: $ROTATION_DIR" >&2
+      exit 0
+    fi
+
+    img=""
+    if [ "$PICK_MODE" = "sequential" ]; then
+      last=""
+      if [ -f "$LAST_FILE" ]; then
+        last="$(cat "$LAST_FILE" || true)"
+      fi
+
+      # Sort for stable order
+      IFS=$'\n' sorted=($(printf '%s\n' "${imgs[@]}" | sort))
+      unset IFS
+
+      # Find next after last
+      next=""
+      found_last=0
+      for f in "${sorted[@]}"; do
+        if [ "$found_last" -eq 1 ]; then
+          next="$f"
+          break
+        fi
+        if [ "$f" = "$last" ]; then
+          found_last=1
+        fi
+      done
+      if [ -z "$next" ]; then
+        next="${sorted[0]}"
+      fi
+      img="$next"
+      printf '%s' "$img" > "$LAST_FILE"
+    else
+      # random
+      img="$(printf '%s\0' "${imgs[@]}" | shuf -z -n 1 | tr -d '\0')"
+    fi
+
+    # Smooth transition wallpaper set
+    swww img "$img" \
+      --transition-type "$TRANSITION_TYPE" \
+      --transition-duration "$TRANSITION_DURATION" \
+      --transition-fps "$TRANSITION_FPS"
+  '';
+in
+{
+  options.dataPro.wallpaper = {
+    enable = lib.mkEnableOption "Hourly wallpaper rotation with swww (Hyprland/Wayland)";
+
+    # You asked to make this easy to change:
+    sourceDir = lib.mkOption {
+      type = lib.types.str;
+      default = "${config.home.homeDirectory}/nixos/files/wallpaper/picture";
+      description = "Folder containing wallpapers to rotate (source of truth).";
+    };
+
+    targetDir = lib.mkOption {
+      type = lib.types.str;
+      default = "${config.home.homeDirectory}/wallpaper";
+      description = "Folder in the user's home where wallpapers are copied to.";
+    };
+
+    rotationDir = lib.mkOption {
+      type = lib.types.str;
+      default = "${config.home.homeDirectory}/wallpaper/picture";
+      description = "Folder used by the rotator to pick wallpapers from (usually inside targetDir).";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    home.packages = [
+      pkgs.swww
+      pkgs.coreutils
+      pkgs.findutils
+      pkgs.gnugrep
+      pkgs.gawk
+      pkgs.util-linux
+    ];
+
+    # Copy wallpapers from sourceDir into rotationDir (real copy) at activation.
+    home.activation.wallpaperCopy = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+      set -euo pipefail
+      mkdir -p "${cfg.targetDir}" "${cfg.rotationDir}"
+
+      if [ -d "${cfg.sourceDir}" ]; then
+        # Copy source into rotationDir (contents only).
+        cp -a "${cfg.sourceDir}/." "${cfg.rotationDir}/"
+      fi
+    '';
+
+    # Install a runtime-editable config into ~/.config/wallpaper/wallpaper.conf
+    # First-time copy from repo if present; then never overwrite if user edited it.
+    home.activation.wallpaperConf = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+      set -euo pipefail
+      mkdir -p "${runtimeConfDir}"
+
+      if [ ! -f "${runtimeConfPath}" ]; then
+        if [ -f "${config.home.homeDirectory}/nixos/files/conf/wallpaper/wallpaper.conf" ]; then
+          cp -a "${config.home.homeDirectory}/nixos/files/conf/wallpaper/wallpaper.conf" "${runtimeConfPath}"
+        else
+          cat > "${runtimeConfPath}" <<'EOF'
+# wallpaper.conf — runtime settings for the wallpaper rotator (swww)
+# Lines are KEY=VALUE. '#' starts a comment.
+
+# Folder to copy wallpapers from (source of truth)
+#SOURCE_DIR="$HOME/nixos/files/wallpaper/picture"
+
+# Where wallpapers are copied to (a folder in your home)
+#TARGET_DIR="$HOME/wallpaper"
+
+# Folder used for rotation (where images are selected from)
+#ROTATION_DIR="$HOME/wallpaper/picture"
+
+# random | sequential
+#PICK_MODE="random"
+
+# swww transition settings
+#TRANSITION_TYPE="fade"
+#TRANSITION_DURATION="2.5"
+#TRANSITION_FPS="60"
+EOF
+        fi
+      fi
+    '';
+
+    # Start swww daemon on graphical session start
+    systemd.user.services.swww-daemon = {
+      Unit = {
+        Description = "swww wallpaper daemon";
+        After = [ "graphical-session.target" ];
+        PartOf = [ "graphical-session.target" ];
+      };
+      Service = {
+        ExecStart = "${pkgs.swww}/bin/swww-daemon";
+        Restart = "on-failure";
+      };
+      Install = {
+        WantedBy = [ "graphical-session.target" ];
+      };
+    };
+
+    # Rotate wallpaper hourly
+    systemd.user.services.wallpaper-rotate = {
+      Unit = {
+        Description = "Rotate wallpaper (hourly)";
+        After = [ "swww-daemon.service" ];
+      };
+      Service = {
+        Type = "oneshot";
+        ExecStart = "${rotateScript}";
+      };
+    };
+
+    systemd.user.timers.wallpaper-rotate = {
+      Unit = {
+        Description = "Hourly wallpaper rotation timer";
+      };
+      Timer = {
+        OnBootSec = "2m";
+        OnUnitActiveSec = "1h";
+        Unit = "wallpaper-rotate.service";
+      };
+      Install = {
+        WantedBy = [ "timers.target" ];
+      };
+    };
+  };
+}