lol

mkosi.extra/usr/lib/command-not-found-handler.py

@@ -17,7 +17,6 @@ known_alternatives = {
     "arp" : "ip neigh",
     "cron" : "systemctl list-timers",
     "dig" : "resolvectl query",
-    "du" : "btrfs filesystem du",
     "egrep" : "rg",
     "fgrep" : "rg -F",
     "hostname" : "hostnamectl",
@@ -28,7 +27,6 @@ known_alternatives = {
     "iptunnel" : "ip tunnel",
     "iwconfig" : "iw",
     "nameif" : "ip link",
-    "ncdu" : "btrfs filesystem du",
     "netstat" : "ss",
     "nslookup" : "resolvectl query",
     "route" : "ip route",

mkosi.extra/usr/share/zsh/plugins/kde-linux-default/kde-linux-default-zshrc.zsh

@@ -118,3 +118,9 @@ source /usr/share/zsh/plugins/zsh-history-substring-search/zsh-history-substring
 # Bind Ctrl+↑ and Ctrl+↓ keybinds to substring history search.
 bindkey '^[[1;5A' history-substring-search-up # Ctrl+↑
 bindkey '^[[1;5B' history-substring-search-down # Ctrl+↓
+
+# Source additional configuration files from this plugin directory.
+for f in /usr/share/zsh/plugins/kde-linux-default/*.zsh; do
+  [[ "$f" == "${(%):-%x}" ]] && continue
+  source "$f"
+done

mkosi.extra/usr/share/zsh/plugins/kde-linux-default/kde-linux-du.zsh

@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+# SPDX-FileCopyrightText: 2026 Hadi Chokr <hadichokr@icloud.com>
+
+# On btrfs systems, wrap du to use btrfs fi du for accurate disk usage reporting.
+# Falls back to system du for unsupported flags or non-btrfs paths.
+function du() {
+  # Whitelist of flags supported by btrfs fi du
+  # Any unrecognised flag falls back to system du
+  local arg
+  for arg in "$@"; do
+    case "$arg" in
+      --) break ;;
+      -s|--summarize|\
+      --raw|\
+      --human-readable|\
+      --iec|\
+      --si|\
+      --kbytes|\
+      --mbytes|\
+      --gbytes|\
+      --tbytes) ;;
+      -*)
+        command du "$@"
+        return
+        ;;
+    esac
+  done
+
+  # Parse opts and paths, respecting --
+  local opts=()
+  local file_paths=()
+  local end_of_opts=false
+
+  while [[ $# -gt 0 ]]; do
+    if [[ "$end_of_opts" == false && "$1" == "--" ]]; then
+      end_of_opts=true
+      shift
+    elif [[ "$end_of_opts" == false && "$1" == -* ]]; then
+      opts+=("$1")
+      shift
+    else
+      file_paths+=("$1")
+      shift
+    fi
+  done
+
+  # Fall back to system du if no paths given
+  if [[ ${#file_paths[@]} -eq 0 ]]; then
+    command du "${opts[@]}"
+    return
+  fi
+
+  # Check all paths are on btrfs
+  local can_use_btrfs=true
+  for path in "${file_paths[@]}"; do
+    local fs
+    fs="$(findmnt -n -o FSTYPE --target "$path" 2>/dev/null)"
+    if [[ "$fs" != "btrfs" ]]; then
+      can_use_btrfs=false
+      break
+    fi
+  done
+
+  if [[ "$can_use_btrfs" == true ]]; then
+    btrfs fi du "${opts[@]}" "${file_paths[@]}"
+  else
+    command du "${opts[@]}" "${file_paths[@]}"
+  fi
+}

mkosi.finalize.d/40-core.sh.chroot

@@ -65,9 +65,6 @@ rm -rf \
     /usr/bin/qvidcap \
     /usr/share/applications/qvidcap.desktop \
 
-# Use the btrfs versions instead as in command_not_found_handle
-rm -rf du \
-
 # Parts of plasma-sdk that are on Flathub now, so you can just get them from there
 # (once everything is on Flathub, we can stop building plasma-sdk, and remove these lines)
 rm -rf \