Updated documentation

README.MD

@@ -79,10 +79,10 @@ If you'd like to use different settings, you need to provide configuration file,
 
 ```
 # Default xcasset dir
-xcassets_dir: Resources/Images.xcassets
+xcassets_dir: Assets.xcassets
 
 # Where vector images are kept
-raw_assets: Assets
+raw_assets: VectorAssets
 
 # Where generated PNG(s) will be kept
 generated_assets_dir: GeneratedAssets
@@ -106,18 +106,31 @@ basset-ios -c "Assets/config.yml"
 ```
 basset-ios [-h] [-d XCASSETS_DIR] [-a RAW_ASSETS_DIR]
                  [-g GENERATED_ASSETS_DIR] [-m MERGE_WITH_XCASSETS]
-                 [-c CONFIG]
+                 [-c CONFIG] [-e EXTRACT_PATH]
 
-optional arguments:
+arguments:
   -h, --help										show help message and exit
   -x, --xcassets_dir XCASSETS_DIR					path to directory with default xcassets directory
   -r, --raw_assets_dir RAW_ASSETS_DIR				path to directory with raw, vector based graphics
   -g, --generated_assets_dir GENERATED_ASSETS_DIR	path to directory where generated PNGs will be stored
   -m, --merge_with_xcassets MERGE_WITH_XCASSETS		will script process xcassets directories
   -f, --force_convert FORCE_CONVERT					should regenerate assets even when they were generated before
   -c, --config CONFIG								path to config file
+  -e, --extract_path EXTRACT_PATH					if set to existing xcassets directory, will extract all assets from it to "raw_assets_dir"
+    
+  
 ```                        
 
+## Extracting assets from existing .xcassets
+
+In case you'd have existing project, with existing .xcassets with PDFs, you can extract them to separate directory, so it could be used in the future.
+
+In order to extract vectors from existing .xcassets directory, you need to run whi command:
+
+```
+basset_ios -e <path_to_xcassets_dir> -r <path_to_vector_assets_dir>
+```
+
 ## Example
 
 1) First of all create new iOS project. Make sure it contains *xcassets* folder inside.

basset/basset_ios.py

@@ -47,7 +47,7 @@ def main(args_to_parse):
     parser = argparse.ArgumentParser(description='Converts raw assets to proper PNG(s).')
 
     main_group = parser.add_argument_group("Main arguments", "Assets converting and merging with xcassets")
-    extract_group = parser.add_argument_group("Extract group", "Extracting assets ")
+    extract_group = parser.add_argument_group("Extract arguments", "Extracting assets from existing .xcassets")
 
     parser.add_argument('-r', '--raw_assets_dir', default="VectorAssets",
                         help='path to directory with raw, vector based graphics')

basset/exceptions.py

@@ -38,7 +38,7 @@ def __init__(self, imageset_directory_path, assets_dir):
     def get_message(self):
         return "Found .xcassets directory with an asset inside: '{0}'. \n" \
                "You cannot have existing xcassets inside vector assets directory. You can extract them with:\n" \
-               "basset_ios -e <path_to_xcassets> -r <path_to_vector_assets_dir>" \
+               "basset_ios -e <path_to_xcassets_dir> -r <path_to_vector_assets_dir>" \
                "".format(self.imageset_directory_path)