dont error on optional stuff, and better formatting

app.py

@@ -29,8 +29,19 @@ def duplicate(source_url, preview_url, model_id, dst_repo, token, repo_type, nsf
         subprocess.check_call([r"aria2c","-x16","--split=16",source_url,"--dir",dir])
 
         filename=os.listdir(dir)[0].rsplit('.',1)[0]
-        subprocess.check_call([r"wget","https://civitai.com/api/v1/model-versions/"+model_id,"-O",dir+"/"+filename+".civitai.info"])
-        subprocess.check_call([r"wget",preview_url,"-O",dir+"/"+filename+".preview.png"])
+        if not model_id=="":
+                apiurl="https://civitai.com/api/v1/model-versions/"+model_id
+                subprocess.check_call(["wget",apiurl,"-O",f"{dir}/{filename}.civitai.info"])
+                apimd=f"\n\n[api response]({apiurl})"
+        else:
+                apimd=""
+        if not preview_url=="":
+                subprocess.check_call(["wget",preview_url,"-O",f"{dir}/{filename}.preview.png"])
+                previewhtml=f' Here\'s your preview:<br><img src="{preview_url}">'
+                previewmd=f'\n\n![preview]({preview_url})'
+        else:
+                previewmd=""
+                previewhtml=""
 
         match repo_type:
                 case "Embedding":
@@ -51,7 +62,7 @@ def duplicate(source_url, preview_url, model_id, dst_repo, token, repo_type, nsf
                 repo_id=dst_repo,
                 repo_type="model",
                 commit_message=filename,
-                commit_description=source_url+"\n\n![preview]("+preview_url+")",
+                commit_description="source: "+source_url+apimd+previewmd,
                 create_pr=make_pr
         )
 
@@ -59,7 +70,7 @@ def duplicate(source_url, preview_url, model_id, dst_repo, token, repo_type, nsf
         subprocess.check_call([r"rm","-rf",dir])
 
         return (
-            f'Find your commit at the top of <a href=\'https://hf.co/{dst_repo}/commits/main{repopath}\' target="_blank" style="text-decoration:underline">your commits</a>, or your pull request <a href="{ret}">here</a>. Here\'s your preview:<br><img src="{preview_url}">'
+            f'Find your commit at the top of <a href=\'https://hf.co/{dst_repo}/commits/main{repopath}\' target="_blank" style="text-decoration:underline">your commits</a>, or your pull request <a href="{ret}">here</a>.{previewhtml}'
         )
 
     except Exception as e: