feat(clean): add snapshot support for volatile repo cleanup

src/repocat/cli/clean.py

@@ -2,6 +2,8 @@ from typer import Typer, Option
 from rich.console import Console
 from rich.table import Table
 import shutil
+import os
+from datetime import datetime
 
 from repocat.config import load_config
 from repocat.models.catalog import RepoCatalogState
@@ -23,7 +25,16 @@ def clean_volatile(
     """
     Löscht **bedingungslos** alle Repositories aus `volatile`-Kategorien (z.B. `scratches`).
     """
-    catalog = RepoCatalogState.from_config(load_config())
+    config = load_config()
+    catalog = RepoCatalogState.from_config(config)
+    
+    # Snapshot configuration
+    use_snapshots = config.defaults.snapshots if config.defaults else False
+    snapshot_count = config.defaults.snapshot_count if config.defaults else 5
+    
+    snapshot_root = config.base_dir / ".snapshots"
+    timestamp = datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
+    current_snapshot_dir = snapshot_root / timestamp
 
     table = Table(title="Clean – Volatile (Zerstörung)")
     table.add_column("Kategorie")
@@ -33,6 +44,7 @@ def clean_volatile(
 
     deleted = 0
     skipped = 0
+    snapshotted_categories = set()
 
     for cat in catalog.categories:
         if not cat.config.volatile:
@@ -40,23 +52,78 @@ def clean_volatile(
         if category and cat.config.name not in category:
             continue
 
-        for repo in cat.repos:
-            size_mb = repo.size_mb
-
+        # If snapshots are enabled, we handle the whole category at once
+        if use_snapshots:
+            if not cat.path.exists():
+                continue
+                
             if dry_run:
-                action = "[yellow]Würde löschen[/]"
+                action = f"[yellow]Würde verschieben nach .snapshots/{timestamp}[/]"
             else:
                 try:
-                    shutil.rmtree(repo.path)
-                    action = "[red]Gelöscht[/]"
-                    deleted += 1
+                    # Create snapshot dir only if we actually have something to move
+                    if not current_snapshot_dir.exists():
+                        current_snapshot_dir.mkdir(parents=True, exist_ok=True)
+                    
+                    target_dir = current_snapshot_dir / cat.config.subdir
+                    # Ensure parent of target exists (if subdir is nested)
+                    target_dir.parent.mkdir(parents=True, exist_ok=True)
+                    
+                    # Move the whole category folder
+                    # Note: shutil.move(src, dst) where dst does not exist moves src to dst.
+                    # If dst exists, it moves src inside dst.
+                    # We want to rename cat.path to target_dir.
+                    shutil.move(str(cat.path), str(target_dir))
+                    
+                    # Recreate the empty category folder
+                    cat.path.mkdir(parents=True, exist_ok=True)
+                    
+                    action = f"[green]Verschoben nach .snapshots/{timestamp}[/]"
+                    snapshotted_categories.add(cat.config.name)
                 except Exception as e:
-                    action = f"[red]Fehler: {e}[/]"
+                    action = f"[red]Fehler beim Verschieben: {e}[/]"
 
-            table.add_row(cat.config.name, repo.name, f"{size_mb:.1f}", action)
+            # Add rows for all repos in this category to show what happened to them
+            if cat.repos:
+                for repo in cat.repos:
+                    table.add_row(cat.config.name, repo.name, f"{repo.size_mb:.1f}", action)
+                    deleted += 1 # Count as "processed/removed from volatile"
+            else:
+                # If no repos but folder existed (and maybe had other files), show a generic row
+                table.add_row(cat.config.name, "(Alle Dateien)", "-", action)
+
+        else:
+            # Old behavior: Delete individual repos
+            for repo in cat.repos:
+                size_mb = repo.size_mb
+
+                if dry_run:
+                    action = "[yellow]Würde löschen[/]"
+                else:
+                    try:
+                        shutil.rmtree(repo.path)
+                        action = "[red]Gelöscht[/]"
+                        deleted += 1
+                    except Exception as e:
+                        action = f"[red]Fehler: {e}[/]"
+
+                table.add_row(cat.config.name, repo.name, f"{size_mb:.1f}", action)
 
     console.print(table)
-    console.print(f"\n[green]✓ Volatile-Clean abgeschlossen[/] – {deleted} gelöscht, {skipped} übersprungen")
+    
+    # Prune old snapshots
+    if use_snapshots and not dry_run and snapshot_root.exists():
+        try:
+            snapshots = sorted([p for p in snapshot_root.iterdir() if p.is_dir()], key=lambda p: p.name)
+            if len(snapshots) > snapshot_count:
+                to_delete = snapshots[:-snapshot_count]
+                for snap in to_delete:
+                    shutil.rmtree(snap)
+                console.print(f"[dim]Alte Snapshots bereinigt: {len(to_delete)} gelöscht[/]")
+        except Exception as e:
+            console.print(f"[red]Fehler beim Bereinigen der Snapshots: {e}[/]")
+
+    console.print(f"\n[green]✓ Volatile-Clean abgeschlossen[/] – {deleted} Repositories verarbeitet")
 
 
 @app.command()