update

ma-sync

@@ -1,58 +1,146 @@
 #!/bin/bash
-set -e
+set -euo pipefail
+IFS=$'\n\t'
 
-remove=0
-if [[ "$1" == "--remove" ]]; then
-    remove=1
-fi
+SRC_ROOT="$HOME/Documents/2026/projects"
+DST_ROOT="$HOME/projects"
+SUBDIR="doc"
+FSTAB="/etc/fstab"
 
-source="$(pwd)"
-name="$(basename "$source")"
-target="$HOME/projects/$name/doc"
+die() { echo "Fehler: $*" >&2; exit 1; }
 
-if [[ "$source" == "$HOME" ]]; then
-    echo "Fehler: \$HOME selbst kann nicht gemountet werden." >&2
+is_mounted() { findmnt -n "$1" >/dev/null 2>&1; }
+
+bind_source_of() {
+    awk -v t="$1" '$5 == t {print $4; exit}' /proc/self/mountinfo
+}
+
+abort_busy() {
+    local target="$1"
+    echo "Fehler: '$target' ist belegt — kann nicht ausgehängt werden." >&2
+    echo "Folgende Prozesse halten das Verzeichnis offen:" >&2
+    lsof +D "$target" 2>/dev/null | head -20 >&2 || true
     exit 1
-fi
-if [[ -z "$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"
+safe_umount() {
+    local target="$1"
+    is_mounted "$target" || return 0
+    sudo umount "$target" 2>/dev/null || abort_busy "$target"
+}
 
-if (( remove )); then
-    if mountpoint -q "$target"; then
-        sudo umount "$target"
-        cp -a "$source/." "$target/"
+remove_fstab_targets() {
+    (( $# > 0 )) || return 0
+    local tmp list
+    tmp=$(mktemp)
+    list=$(printf '%s\n' "$@")
+    awk -v targets="$list" '
+        BEGIN { n = split(targets, arr, "\n"); for (i in arr) if (arr[i] != "") skip[arr[i]] = 1 }
+        !($2 in skip) { print }
+    ' "$FSTAB" > "$tmp"
+    sudo install -m 644 -o root -g root "$tmp" "$FSTAB"
+    rm -f "$tmp"
+}
+
+append_fstab() {
+    echo "$1 $2 none bind,nofail 0 0" | sudo tee -a "$FSTAB" > /dev/null
+}
+
+fstab_bind_targets_under() {
+    local prefix="$1"
+    awk -v p="$prefix/" '
+        $3 == "none" && $4 ~ /(^|,)bind(,|$)/ && index($2, p) == 1 { print $1 "\t" $2 }
+    ' "$FSTAB"
+}
+
+mode_remove() {
+    local entries=()
+    mapfile -t entries < <(fstab_bind_targets_under "$DST_ROOT")
+    if (( ${#entries[@]} == 0 )); then
+        echo "Keine ma-sync Mounts in fstab gefunden."
+        return 0
     fi
-    sudo sed -i "$fstab_pattern" /etc/fstab
+
+    local targets=() removed=0 src target entry
+    for entry in "${entries[@]}"; do
+        IFS=$'\t' read -r src target <<< "$entry"
+        echo "→ Entferne: $target  (Source: $src)"
+        safe_umount "$target"
+        if [[ -d "$src" ]]; then
+            cp -a "$src/." "$target/"
+        else
+            echo "  Warnung: Source '$src' existiert nicht mehr — Target bleibt leer." >&2
+        fi
+        targets+=("$target")
+        removed=$((removed + 1))
+    done
+
+    remove_fstab_targets "${targets[@]}"
     sudo systemctl daemon-reload
-    echo "Entfernt: $target"
-    exit 0
-fi
+    echo "✓ $removed Mount(s) entfernt, Inhalte kopiert, fstab bereinigt."
+}
 
-mkdir -p "$target"
+mode_mount() {
+    [[ -d "$SRC_ROOT" ]] || die "Source-Root '$SRC_ROOT' existiert nicht."
 
-if ! mountpoint -q "$target" && [[ -n "$(ls -A "$target" 2>/dev/null)" ]]; then
-    echo "Target nicht leer — wird durch Source überschrieben: $target" >&2
+    local mounted=0 skipped=0 remounted=0
+
+    shopt -s nullglob
+    local src name target
+    for src in "$SRC_ROOT"/*/; do
+        src="${src%/}"
+        name=$(basename "$src")
+        target="$DST_ROOT/$name/$SUBDIR"
+
+        # Sicherheitschecks
+        [[ -z "$name" || "$name" == "/" ]] && continue
+        [[ "$src" == "$HOME" ]] && continue
+        [[ "$src" == "$target" ]] && continue
+        case "$target/" in "$src"/*) continue;; esac
+        case "$src/" in "$target"/*) continue;; esac
+
+        # Nur mounten, wenn das Target-Parent-Verzeichnis (mit gleichem Namen) bereits existiert
+        if [[ ! -d "$DST_ROOT/$name" ]]; then
+            echo "↷ kein Target-Container: $DST_ROOT/$name fehlt → übersprungen"
+            skipped=$((skipped + 1))
+            continue
+        fi
+
+        if is_mounted "$target"; then
+            local cur
+            cur=$(bind_source_of "$target")
+            if [[ "$cur" == "$src" ]]; then
+                echo "↻ skip (bereits korrekt): $target"
+                skipped=$((skipped + 1))
+                continue
+            fi
+            echo "↺ Re-mount: $target  (war: $cur, neu: $src)"
+            safe_umount "$target"
+            remounted=$((remounted + 1))
+        fi
+
+        mkdir -p "$target"
+        if [[ -n "$(ls -A "$target" 2>/dev/null)" ]]; then
+            echo "  Target '$target' nicht leer — wird geleert." >&2
             find "$target" -mindepth 1 -delete
-fi
+        fi
 
-if mountpoint -q "$target"; then
-    sudo umount "$target"
-fi
-sudo sed -i "$fstab_pattern" /etc/fstab
+        remove_fstab_targets "$target"
+        sudo mount --bind "$src" "$target"
+        append_fstab "$src" "$target"
+        echo "✓ gemountet: $src → $target"
+        mounted=$((mounted + 1))
+    done
+    shopt -u nullglob
 
-sudo mount --bind "$source" "$target"
-echo "$fstab_line" | sudo tee -a /etc/fstab > /dev/null
-sudo systemctl daemon-reload
+    sudo systemctl daemon-reload
 
-echo "Gespiegelt: $source ↔ $target"
+    echo ""
+    echo "Zusammenfassung: $mounted gemountet (davon $remounted Re-mount), $skipped übersprungen."
+}
+
+case "${1:-}" in
+    --remove) mode_remove ;;
+    "")       mode_mount ;;
+    *)        die "Unbekanntes Argument: '$1' (erwartet: --remove oder leer)" ;;
+esac