commit 89d74f8e2f65370971a80d592f3ebefcf25609a6
Author: Marek Lenczewski <gitlab@marha.de>
Date:   Wed Apr 15 21:07:06 2026 +0200

    init

diff --git a/ma-sync b/ma-sync
new file mode 100755
index 0000000..36281d4
--- /dev/null
+++ b/ma-sync
@@ -0,0 +1,59 @@
+#!/bin/bash
+set -e
+
+remove=0
+if [[ "$1" == "--remove" ]]; then
+    remove=1
+fi
+
+source="$(pwd)"
+name="$(basename "$source")"
+target="$HOME/projects/$name/doc"
+
+if [[ "$source" == "$HOME" ]]; then
+    echo "Fehler: \$HOME selbst kann nicht gemountet werden." >&2
+    exit 1
+fi
+if [[ -z "$name" || "$name" == "/" ]]; then
+    echo "Fehler: ungültiger Ordnername." >&2
+    exit 1
+fi
+if [[ "$source" == "$target" ]]; then
+    echo "Fehler: Source und Target sind identisch." >&2
+    exit 1
+fi
+case "$target/" in "$source"/*) echo "Fehler: Target liegt unter Source (Rekursionsgefahr)." >&2; exit 1;; esac
+case "$source/" in "$target"/*) echo "Fehler: Source liegt unter Target (Rekursionsgefahr)." >&2; exit 1;; esac
+
+fstab_line="$source $target none bind,nofail 0 0"
+fstab_pattern="\\# $target #d"
+
+if (( remove )); then
+    if mountpoint -q "$target"; then
+        sudo umount "$target"
+        cp -a "$source/." "$target/"
+    fi
+    sudo sed -i "$fstab_pattern" /etc/fstab
+    sudo systemctl daemon-reload
+    echo "Entfernt: $target"
+    exit 0
+fi
+
+mkdir -p "$target"
+
+if ! mountpoint -q "$target" && [[ -n "$(ls -A "$target" 2>/dev/null)" ]]; then
+    echo "Fehler: $target existiert und ist nicht leer (kein Mount-Point)." >&2
+    echo "  → Inhalt vorher nach $source verschieben oder $target leeren." >&2
+    exit 1
+fi
+
+if mountpoint -q "$target"; then
+    sudo umount "$target"
+fi
+sudo sed -i "$fstab_pattern" /etc/fstab
+
+sudo mount --bind "$source" "$target"
+echo "$fstab_line" | sudo tee -a /etc/fstab > /dev/null
+sudo systemctl daemon-reload
+
+echo "Gespiegelt: $source ↔ $target"