reworked CLI + accept --input or piping

meme_otron/__main__.py

@@ -1,5 +1,6 @@
 import sys
 import os
+import logging
 
 from . import img_factory
 from . import meme_db
@@ -8,6 +9,19 @@ from . import utils
 from . import VERSION
 
 if __name__ == "__main__":
+    wmark = not utils.read_argument(sys.argv, "-nw", "--no-watermark", delete=True)
+    debug = utils.read_argument(sys.argv, "-d", "--debug", delete=True)
+    verbose = utils.read_argument(sys.argv, "-v", "--verbose", delete=True)
+    output_file = utils.read_argument(sys.argv, "-o", "--output", valued=True, delete=True)
+    input_file = utils.read_argument(sys.argv, "-i", "--input", valued=True, delete=True)
+
+    if verbose and debug:
+        logging.basicConfig(format="[%(asctime)s][%(levelname)s][%(module)s] %(message)s", level=logging.DEBUG)
+    elif verbose:
+        logging.basicConfig(format="[%(asctime)s][%(levelname)s][%(module)s] %(message)s", level=logging.INFO)
+    else:
+        logging.basicConfig(format="%(message)s", level=logging.WARNING)
+
     meme_db.load_memes()
     img_factory.load_fonts()
 
@@ -19,8 +33,18 @@ if __name__ == "__main__":
               file=sys.stderr)
         sys.exit(1)
     else:
-        output_file = utils.read_argument(sys.argv, "-o", "--output", valued=True, delete=True)
+        input_data = None
-        img, errors = meme_otron.compute(*sys.argv[1:])
+        if input_file is not None:
+            try:
+                with open(input_file, "rb") as f:
+                    input_data = f.read()
+            except IOError as e:
+                print(f"Cannot read '{input_file}': {e}", file=sys.stderr)
+                sys.exit(1)
+        elif not sys.stdin.isatty():
+            input_data = utils.read_stream(sys.stdin.buffer)
+
+        img, errors = meme_otron.compute(*sys.argv[1:], input_data=input_data, wmark=wmark, debug=debug)
         for err in errors:
             print(err, file=sys.stderr)
         if img is None: