show help if no parameters are passed

.gitignore

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+test_dir1
+test_dir2

create_test_structure.py

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+import os
+import shutil
+import hashlib
+import random
+import string
+
+def create_test_directory(base_dir, num_files=5, duplicate_files=2):
+    if not os.path.exists(base_dir):
+        os.makedirs(base_dir)
+
+    # Erstelle eine Liste von eindeutigen Dateinamen
+    file_names = [f"file_{i}.txt" for i in range(num_files)]
+
+    # Erstelle einige Dateien mit zufälligem Inhalt
+    for file_name in file_names:
+        with open(os.path.join(base_dir, file_name), 'w') as f:
+            content = ''.join(random.choices(string.ascii_lowercase, k=20))
+            f.write(content)
+
+    # Erstelle Duplikate
+    for i in range(duplicate_files):
+        original = os.path.join(base_dir, file_names[i])
+        duplicate = os.path.join(base_dir, f"dup_{file_names[i]}")
+        shutil.copyfile(original, duplicate)
+
+def create_file_structure():
+    # Basisverzeichnisse erstellen
+    base_dirs = ['test_dir1', 'test_dir2']
+    for base_dir in base_dirs:
+        create_test_directory(base_dir)
+
+    # Erstelle eine Datei im ersten Verzeichnis und dupliziere sie im zweiten
+    with open(os.path.join('test_dir1', 'unique_file.txt'), 'w') as f:
+        f.write("This is a unique file.")
+
+    shutil.copyfile(os.path.join('test_dir1', 'unique_file.txt'),
+                    os.path.join('test_dir2', 'unique_file.txt'))
+
+    # Erstelle eine zusätzliche einzigartige Datei im zweiten Verzeichnis
+    with open(os.path.join('test_dir2', 'another_unique_file.txt'), 'w') as f:
+        f.write("This is another unique file.")
+
+    print("Test file structure created.")
+
+if __name__ == "__main__":
+    create_file_structure()

main.py

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+import os
+import argparse
+import hashlib
+from collections import defaultdict
+
+def md5sum(filename):
+    hash_md5 = hashlib.md5()
+    with open(filename, "rb") as f:
+        for chunk in iter(lambda: f.read(4096), b""):
+            hash_md5.update(chunk)
+    return hash_md5.hexdigest()
+
+def find_duplicates(directories):
+    hashes = defaultdict(list)
+    for directory in directories:
+        for root, dirs, files in os.walk(directory):
+            for filename in files:
+                path = os.path.join(root, filename)
+                file_hash = md5sum(path)
+                hashes[file_hash].append(path)
+    return {file_hash: paths for file_hash, paths in hashes.items() if len(paths) > 1}
+
+def handle_modification(files, modification, mode, apply_to):
+    if mode == 'preview':
+        if modification == 'show':
+            print("Would show the following duplicate files:")
+            for file in files:
+                if file.startswith(tuple(apply_to)):
+                    print(file)
+    elif mode == 'act':
+        if modification == 'delete':
+            for file in files:
+                if file.startswith(tuple(apply_to)):
+                    print(f"Deleting {file}")
+                    os.remove(file)
+        elif modification == 'hardlink':
+            # Implement hardlink logic here
+            pass
+        elif modification == 'symlink':
+            # Implement symlink logic here
+            pass
+    elif mode == 'interactive':
+        for file in files:
+            if file.startswith(tuple(apply_to)):
+                answer = input(f"Do you want to {modification} this file? {file} [y/N] ")
+                if answer.lower() in ['y', 'yes']:
+                    # Implement deletion, hardlink or symlink logic here
+                    pass
+
+def main(args):
+    directories = args.directories
+    apply_to = args.apply_to or directories
+    duplicates = find_duplicates(directories)
+    
+    if not duplicates:
+        print("No duplicates found.")
+        return
+    
+    for file_hash, files in duplicates.items():
+        if args.mode == 'preview' or (args.mode == 'interactive' and args.modification == 'show'):
+            print(f"Duplicate files for hash {file_hash}:")
+            [print(file) for file in files if file.startswith(tuple(apply_to))]
+        else:
+            handle_modification(files, args.modification, args.mode, apply_to)
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Find and handle duplicate files.")
+    parser.add_argument('directories', nargs='*', help="Directories to scan for duplicates.")
+    parser.add_argument('--apply-to', nargs='*', help="Directories to apply modifications to.")
+    parser.add_argument('--modification', choices=['delete', 'hardlink', 'symlink', 'show'], default='show', help="Modification to perform on duplicates.")
+    parser.add_argument('--mode', choices=['act', 'preview', 'interactive'], default='preview', help="How to apply the modifications.")
+
+    args = parser.parse_args()
+    
+    if not args.directories:
+        parser.print_help()
+        parser.exit()
+
+    if args.apply_to and args.modification not in ['delete', 'hardlink', 'symlink']:
+        parser.error("--apply-to requires --modification to be 'delete', 'hardlink', or 'symlink'.")
+    if not args.apply_to and args.modification != 'show':
+        parser.error("Without --apply-to only 'show' modification is allowed.")
+
+    main(args)