added merge pdfs, fixed jpgstopdf arg issues,

pdftomd.py

@@ -4,10 +4,29 @@ import sys
 import os
 
 def pdf_to_markdown(pdf_path, output_md_path):
+    # Check if the input PDF file exists
+    if not os.path.isfile(pdf_path):
+        print(f"Error: The input PDF file '{pdf_path}' does not exist.")
+        sys.exit(1)
+
+    # Check if the output directory is writable
+    output_dir = os.path.dirname(output_md_path)
+    if output_dir and not os.access(output_dir, os.W_OK):
+        print(f"Error: The output directory '{output_dir}' is not writable.")
+        sys.exit(1)
+
     try:
+        # Open the PDF document
         pdf_document = fitz.open(pdf_path)
+        if pdf_document.page_count == 0:
+            print("Error: The PDF file contains no pages.")
+            pdf_document.close()
+            sys.exit(1)
+
+        # Initialize the Markdown content
         md_content = "# PDF Content\n\n"
         
+        # Extract text from each page
         for page_num in range(len(pdf_document)):
             page = pdf_document.load_page(page_num)
             text = page.get_text()
@@ -15,19 +34,27 @@ def pdf_to_markdown(pdf_path, output_md_path):
         
         pdf_document.close()
         
-        with open(output_md_path, 'w') as file:
+        # Write the Markdown content to the output file
+        with open(output_md_path, 'w', encoding='utf-8') as file:
             file.write(md_content)
         
-        print(f"Markdown file created at {output_md_path}")
+        print(f"Markdown file created at '{output_md_path}'")
+    except FileNotFoundError:
+        print(f"Error: The input PDF file '{pdf_path}' was not found.")
+        sys.exit(1)
+    except PermissionError:
+        print(f"Error: Permission denied when writing to '{output_md_path}'.")
+        sys.exit(1)
     except Exception as e:
-        print(f"Error reading PDF content: {e}")
+        print(f"An unexpected error occurred: {e}")
         sys.exit(1)
 
-if len(sys.argv) != 3:
-    print("Usage: pdftomd <input_pdf_path> <output_md_path>")
-    sys.exit(1)
+if __name__ == "__main__":
+    if len(sys.argv) != 3:
+        print("Usage: pdftomd <input_pdf_path> <output_md_path>")
+        sys.exit(1)
 
-input_path = sys.argv[1]
-output_path = sys.argv[2]
+    input_path = sys.argv[1]
+    output_path = sys.argv[2]
 
-pdf_to_markdown(input_path, output_path)
+    pdf_to_markdown(input_path, output_path)