Check the output file existence first

1 files changed, 8 insertions, 2 deletions

diff --git a/bin/hpx2healpix b/bin/hpx2healpix
index ca485ac..bbc3e0d 100755
--- a/bin/hpx2healpix
+++ b/bin/hpx2healpix
@@ -60,11 +60,17 @@ def main():
         'See also {0}'.format(fg21sim.__url__)
     ]
 
+    if os.path.exists(args.outfile):
+        if args.clobber:
+            logger.warning("Remove existing output file: %s" % args.outfile)
+            os.remove(args.outfile)
+        else:
+            raise OSError("Output file already exists: %s" % args.outfile)
+
     hp_data, hp_header = hpx2healpix(args.infile,
                                      append_history=history,
                                      append_comment=comments)
-    write_fits_healpix(args.outfile, hpmap=hp_data, header=hp_header,
-                       clobber=args.clobber)
+    write_fits_healpix(args.outfile, hpmap=hp_data, header=hp_header)
     logger.info("HEALPix data write to FITS file: %s" % args.outfile)