Downlaod NoC MLP benchmarks from EECG network

If blif and traffic flow symlinks already exits, recreate them
Ignores downloaded tar.gz files

Author: soheilshahrouz

.gitignore

@@ -48,6 +48,8 @@ vtr_flow/benchmarks/noc/Large_Designs/MLP/**/*.vqm
 vtr_flow/benchmarks/noc/Large_Designs/MLP/**/*.blif
 vtr_flow/benchmarks/noc/Large_Designs/MLP/blif_files/*
 vtr_flow/benchmarks/noc/Large_Designs/MLP/traffic_flow_files/*
+MLP_Benchmark_Netlist_Files_blif.tar.gz
+MLP_Benchmark_Netlist_Files_vqm_blif.tar.gz
 
 #
 # ISPD benchmarks

vtr_flow/scripts/download_noc_mlp.py

@@ -10,6 +10,7 @@
 import tarfile
 import tempfile
 import shutil
+import errno
 
 
 class DownloadError(Exception):
@@ -78,7 +79,7 @@ def main():
             print("Found existing {} (skipping download and extraction)".format(tar_gz_filename))
         else:
             print("Downloading {}".format(tar_gz_url))
-            # download_url(tar_gz_filename, tar_gz_url)
+            download_url(tar_gz_filename, tar_gz_url)
 
             print("Extracting {}".format(tar_gz_filename))
             extract_to_vtr_flow_dir(args, tar_gz_filename)
@@ -184,7 +185,14 @@ def find_and_link_files(base_path, target_extension, link_folder_name):
 
                 # Create symbolic link in the link folder
                 link_name = os.path.join(link_folder_path, file)
-                os.symlink(file_path, link_name)
+                try:
+                    os.symlink(file_path, link_name)
+                except OSError as e:
+                    if e.errno == errno.EEXIST:
+                        os.remove(link_name)
+                        os.symlink(file_path, link_name)
+                else:
+                    raise e
 
 
 if __name__ == "__main__":