Fix instance buffer size

prepare_env.py

@@ -35,19 +35,24 @@ class Dependency:
                 break
 
     def download(self):
-
+        dl_counter = 0
         # Git repository
         if hasattr(self, "git_url") and self.git_url:
             repo = git.Repo.clone_from(self.git_url, os.path.join(REPO_DIR, self.name))
             repo.git.checkout(self.tag)
         elif hasattr(self, "dl_url") and self.dl_url:
-            response = requests.get(self.dl_url)
-            if response.status_code == 200: # everything went fine
-                open(os.path.join(REPO_DIR, self.name), "wb").write(response.content)
+            while dl_counter < 10:
+                response = requests.get(self.dl_url)
+                if response.status_code == 200: # everything went fine
+                    open(os.path.join(REPO_DIR, self.name), "wb").write(response.content)
+                    break
+                dl_counter += 1
+                print("Failed to download {}. Retrying {}th time...", self.name, dl_counter)
+                time.sleep(5.0)
 
         if hasattr(self, "custom_commands") and self.custom_commands:
-            p = subprocess.Popen(self.custom_commands, shell=True)
-
+            p = subprocess.run(self.custom_commands, shell=True)
+            p.chek_returncode()
 
 def main():
     if not os.path.isdir(REPO_DIR):
@@ -77,4 +82,4 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
+    main()