apertis-abi-compare: check artifacts from a previous run instead of crashing

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

tools/apertis-abi-compare

@@ -161,7 +161,16 @@ def main():
         sys.exit('ERROR: abi-compliance-checker not found in /usr/bin/\n' +
                  'ERROR: abi-compliance-checker can be installed with: apt install abi-compliance-checker')
 
-    print("Checking for ABI/API breakage!")
+    print(f"Checking for ABI/API breakage in {folder_bin}!")
+
+    # Check if artifacts from a previous run are still there
+    folder_pbo = os.path.exists('pkg_binaries_old')
+    folder_poe = os.path.exists('pkg_old_extracted')
+    folder_pne = os.path.exists('pkg_new_extracted')
+    if folder_pbo or folder_poe or folder_pne:
+        sys.exit('ERROR: artifacts from a previous run have been found!\n' +
+                 'ERROR: be sure to remove remaining folders:\n' +
+                 'ERROR: \'pkg_binaries_old\', \'pkg_old_extracted\' and \'pkg_new_extracted\'')
 
     # Extract debs of new version
     extract_debs(folder_bin, 'pkg_new_extracted')