Update app.py

app.py

@@ -33,6 +33,8 @@ As part of the BigCode project, we released and maintain [The Stack V2](https://
 """ + """\
 
 This tool lets you check if a repository under a given username is part of The Stack dataset. Would you like to have your data removed from future versions of The Stack? You can opt-out following the instructions [here](https://www.bigcode-project.org/docs/about/the-stack/#how-can-i-request-that-my-data-be-removed-from-the-stack). Note that previous opt-outs might still be displayed in the release candidate (denoted with "-rc"), which will be removed for the release.
+
+**Note**: The Stack v2.0 is built from the data provided by the [Software Heriage Archive](https://archive.softwareheritage.org/), so it may include repositories that are no longer present on GitHub.
 """
 
 opt_out_text_template = """\
@@ -68,9 +70,15 @@ def check_username(username, version):
     if username in usernames[version] and len(usernames[version][username])>0:
         repos = usernames[version][username]
         repo_word = "repository" if len(repos)==1 else "repositories"
-        output_md += f"**Yes**, there is code from **{len(repos)} {repo_word}** in The Stack:\n\n"
+        if version[:2] == "v2":
+            output_md += f"**Yes**, there is code from **{len(repos)} {repo_word}** in The Stack. Check the links to see when it was archived by Software Heritage:\n\n"
+        else:
+            output_md += f"**Yes**, there is code from **{len(repos)} {repo_word}** in The Stack:\n\n"
         for repo in repos:
-            output_md += f"_{repo}_\n\n"
+            if version[:2] == "v2":
+                output_md += f"[{repo}](https://archive.softwareheritage.org/browse/origin/visits/?origin_url=https://github.com/{repo})\n\n"
+            else:
+                output_md += f"_{repo}_\n\n"
 
         return output_md.strip(), issue_url(username, repos)
     else: