Update app.py

app.py

@@ -4,12 +4,21 @@ import tempfile
 import base64
 from pathlib import Path
 import os
+import shutil
 
 # Set page configuration
 st.set_page_config(page_title="LaTeX Editor & Compiler", page_icon="📝", layout="wide")
 
+# Check if pdflatex is available
+def is_pdflatex_installed():
+    return shutil.which("pdflatex") is not None
+
 # Function to convert LaTeX to PDF
 def latex_to_pdf(latex_code):
+    # Check if pdflatex is installed
+    if not is_pdflatex_installed():
+        return None, "", "Error: pdflatex is not installed or not in PATH. Check Dockerfile configuration."
+    
     with tempfile.TemporaryDirectory() as temp_dir:
         temp_path = Path(temp_dir)
         tex_file = temp_path / "document.tex"
@@ -20,9 +29,13 @@ def latex_to_pdf(latex_code):
             f.write(latex_code)
         
         try:
-            # Run pdflatex to compile the LaTeX file
+            # Print the command being run for debugging
+            cmd = ["pdflatex", "-interaction=nonstopmode", "-output-directory", temp_dir, str(tex_file)]
+            st.write(f"Running command: {' '.join(cmd)}")
+            
+            # Run pdflatex with full path if needed
             process = subprocess.run(
-                ["pdflatex", "-interaction=nonstopmode", "-output-directory", temp_dir, str(tex_file)],
+                cmd,
                 capture_output=True,
                 text=True
             )
@@ -35,7 +48,8 @@ def latex_to_pdf(latex_code):
             else:
                 return None, process.stdout, process.stderr
         except Exception as e:
-            return None, "", str(e)
+            return None, "", f"Error executing pdflatex: {str(e)}"
+
 
 # Function to display PDF
 def display_pdf(pdf_data):