Make --lang parameter optional with auto-detection from PO files

README.md

@@ -15,8 +15,8 @@ pip install gpt-po-translator
 # Set API key
 export OPENAI_API_KEY='your_api_key_here'
 
-# Translate to German and French
-gpt-po-translator --folder ./locales --lang de,fr --bulk
+# Auto-detect and translate all languages
+gpt-po-translator --folder ./locales --bulk
 ```
 
 ## ✨ Key Features
@@ -73,26 +73,26 @@ export AZURE_OPENAI_API_VERSION='2024-02-01'
 
 ### Basic Translation
 ```bash
-# Translate to German (default: shows warnings/errors only)
-gpt-po-translator --folder ./locales --lang de
+# Auto-detect languages from PO files (recommended)
+gpt-po-translator --folder ./locales --bulk -v
 
-# With progress information
-gpt-po-translator --folder ./locales --lang de -v
+# Or specify languages explicitly
+gpt-po-translator --folder ./locales --lang de,fr,es --bulk -v
 
-# Multiple languages with verbose output
-gpt-po-translator --folder ./locales --lang de,fr,es -v --bulk
+# Single language with progress information
+gpt-po-translator --folder ./locales --lang de -v
 ```
 
 ### Different AI Providers
 ```bash
-# Use Claude (Anthropic)
-gpt-po-translator --provider anthropic --folder ./locales --lang de
+# Use Claude (Anthropic) - auto-detect languages
+gpt-po-translator --provider anthropic --folder ./locales --bulk
 
-# Use DeepSeek
+# Use DeepSeek with specific languages
 gpt-po-translator --provider deepseek --folder ./locales --lang de
 
-# Use Azure OpenAI
-gpt-po-translator --provider azure_openai --folder ./locales --lang de
+# Use Azure OpenAI with auto-detection
+gpt-po-translator --provider azure_openai --folder ./locales --bulk
 ```
 
 ### Docker Usage
@@ -101,7 +101,7 @@ gpt-po-translator --provider azure_openai --folder ./locales --lang de
 docker run -v $(pwd):/data \
   -e OPENAI_API_KEY="your_key" \
   ghcr.io/pescheckit/python-gpt-po:latest \
-  --folder /data --lang de,fr --bulk
+  --folder /data --bulk
 
 # With Azure OpenAI
 docker run -v $(pwd):/data \

docs/usage.md

@@ -103,12 +103,12 @@ Below is a detailed explanation of all command-line arguments:
   *Description:* Specifies the input folder containing one or more `.po` files to be processed.  
   *Behind the scenes:* The tool recursively scans this folder and processes every file ending with `.po`.
 
-- **`--lang <language_codes>`**  
-  *Description:* A comma-separated list of ISO 639-1 language codes (e.g., `de,fr`) or locale codes (e.g., `fr_CA,pt_BR`).  
-  *Behind the scenes:* The tool filters PO files by comparing these codes with the file metadata and folder names (if `--folder-language` is enabled).
-
 ### Optional Options
 
+- **`--lang <language_codes>`** *(Optional)*  
+  *Description:* A comma-separated list of ISO 639-1 language codes (e.g., `de,fr`) or locale codes (e.g., `fr_CA,pt_BR`). **If not provided, the tool will auto-detect languages from PO file metadata or folder structure.**  
+  *Behind the scenes:* The tool filters PO files by comparing these codes with the file metadata and folder names (if `--folder-language` is enabled). When omitted, it scans all PO files to extract language information automatically.
+
 - **`--detail-lang <language_names>`**  
   *Description:* A comma-separated list of full language names (e.g., `"German,French"`) that correspond to the codes provided with `--lang`.  
   *Behind the scenes:* These names are used in the translation prompts to give the AI clearer context, potentially improving translation quality.  

python_gpt_po/main.py

@@ -19,7 +19,7 @@
 from .services.model_manager import ModelManager
 from .services.translation_service import TranslationService
 from .utils.cli import (auto_select_provider, create_language_mapping, get_provider_from_args, parse_args,
-                        parse_languages, show_help_and_exit, validate_provider_key)
+                        show_help_and_exit, validate_provider_key)
 
 
 def setup_logging(verbose: int = 0, quiet: bool = False):
@@ -195,18 +195,13 @@ def main():
 
         # Get languages - either from args or auto-detect from PO files
         try:
-            if args.lang:
-                languages = parse_languages(args.lang)
-                logging.info("Using specified languages: %s", ', '.join(languages))
-            else:
-                respect_gitignore = not args.no_gitignore  # Invert the flag
-                languages = LanguageDetector.detect_languages_from_folder(
-                    args.folder,
-                    use_folder_structure=args.folder_language,
-                    respect_gitignore=respect_gitignore
-                )
-                detection_method = "folder structure" if args.folder_language else "metadata"
-                logging.info("Auto-detected languages from %s: %s", detection_method, ', '.join(languages))
+            respect_gitignore = not args.no_gitignore  # Invert the flag
+            languages = LanguageDetector.validate_or_detect_languages(
+                folder=args.folder,
+                lang_arg=args.lang,
+                use_folder_structure=args.folder_language,
+                respect_gitignore=respect_gitignore
+            )
         except ValueError as e:
             logging.error(str(e))
             sys.exit(1)

python_gpt_po/utils/cli.py

@@ -46,17 +46,17 @@ def parse_args() -> Namespace:
         description="Translate .po files using AI language models",
         epilog="""
 Examples:
-  # Basic usage with OpenAI
+  # Auto-detect languages from PO files (recommended)
+  gpt-po-translator --folder ./locales --bulk
+
+  # Specify languages explicitly
   gpt-po-translator --folder ./locales --lang fr,es,de
 
   # Use Anthropic with detailed language names
   gpt-po-translator --folder ./i18n --lang nl,de --detail-lang "Dutch,German" --provider anthropic
 
   # List available models for a provider (no need for --folder or --lang)
   gpt-po-translator --provider deepseek --list-models
-
-  # Process multiple translations in bulk with a specific model
-  gpt-po-translator --folder ./locales --lang ja,ko --bulk --model gpt-4
 """,
         formatter_class=lambda prog: RawDescriptionHelpFormatter(prog, max_help_position=35, width=100)
     )
@@ -76,15 +76,14 @@ def parse_args() -> Namespace:
         metavar="FOLDER",
         help="Input folder containing .po files"
     )
-    required_group.add_argument(
+
+    # Language options
+    language_group.add_argument(
         "-l", "--lang",
-        required=False,  # Now optional - will auto-detect from PO files if not provided
         metavar="LANG",
         help=("Comma-separated language codes to translate (e.g., fr,es,de or locale codes like fr_CA,pt_BR,en-US). "
               "If not provided, will auto-detect from PO files")
     )
-
-    # Language options
     language_group.add_argument(
         "--detail-lang",
         metavar="NAMES",

python_gpt_po/utils/helpers.py

@@ -2,8 +2,6 @@
 Helper utilities for the PO translator application.
 """
 
-from pkg_resources import DistributionNotFound, get_distribution
-
 # Import version with fallback to avoid circular imports
 try:
     from .. import __version__
@@ -21,8 +19,15 @@ def get_version():
     # First check if version is available from the top-level import
     if __version__ is not None:
         return __version__
-    # Fall back to package metadata
+
+    # Fall back to modern package metadata approach
     try:
-        return get_distribution("gpt-po-translator").version
-    except DistributionNotFound:
+        # Use importlib.metadata (Python 3.8+) or importlib_metadata (fallback)
+        try:
+            from importlib.metadata import version
+        except ImportError:
+            from importlib_metadata import version
+        return version("gpt-po-translator")
+    except Exception:
+        # Final fallback if all else fails
         return "0.0.0"