Checkfix

pdelfin/check.py

@@ -7,12 +7,15 @@
 def check_poppler_version():
     try:
         result = subprocess.run(['pdftoppm', '-h'], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
-        if result.returncode == 0 and "pdftoppm" in result.stdout:
+        if result.returncode == 0 and result.stderr.startswith("pdftoppm"):
             logger.info("pdftoppm is installed and working.")
         else:
-            logger.error("pdftoppm is installed but returned an error.")
+            logger.error(f"pdftoppm is installed but returned an error.")
             sys.exit(1)
     except FileNotFoundError:
         logger.error("pdftoppm is not installed.")
         logger.error("Check the README in the https://github.com/allenai/pdelfin/blob/main/README.md for installation instructions")
-        sys.exit(1)
+        sys.exit(1)
+
+if __name__ == "__main__":
+    check_poppler_version()