Made git_pat field mandatory only for private repo.

Author: nishgit

aidp_migration/git_download_and_extract_to_aidp.ipynb

@@ -28,7 +28,8 @@
         "\n",
         "**Note:** \n",
         "\n",
-        "- Replace all placeholders (e.g., `<GIT_USERNAME>`, `<GIT_PAT>`, `<AIDP_WORKSPACE_PATH>`, `<GIT_REPO_NAME>`, `<GIT_BRANCH>`  etc.) with values specific to your environment before running the notebook. \n",
+        "- Replace all placeholders (e.g., `<GIT_USERNAME>`, `<GIT_PAT>`, `<AIDP_WORKSPACE_PATH>`, `<GIT_REPO_NAME>`, `<GIT_BRANCH>`, `<IS_PRIVATE_REPO>`  etc.) with values specific to your environment before running the notebook. \n",
+        "- GIT_PAT is mandatory only for private repository.\n",
         "- Use with caution: Notebook is designed for downloading all files from repo and unarchive to provided workspace path.\n",
         "- This notebook should be executed from AIDP.\n",
         "- Hardcoding Git token into the notebook leaves credentials vulnerable. It is strongly advised to manage the token securely by loading it dynamically from an environment variable, a secure configuration file, or a OCI Vault."
@@ -49,14 +50,16 @@
       "source": [
         "# Username of Github\n",
         "git_username = \"<GIT_USERNAME>\"\n",
-        "# Access Token of Github\n",
+        "# Access Token of Github, needed for Private Repository.\n",
         "git_pat = \"<GIT_PAT>\"\n",
         "# AIDP Workspace path to download repository\n",
         "aidp_path = \"<AIDP_WORKSPACE_PATH>\"\n",
         "# Github Repository Name\n",
         "git_repo_name = \"<GIT_REPO_NAME>\"\n",
         "# Github Branch Name\n",
-        "git_branch = \"<GIT_BRANCH>\""
+        "git_branch = \"<GIT_BRANCH>\"\n",
+        "# Field 'is_private_repo' should be provided as a boolean (True/False).\n",
+        "is_private_repo = \"<IS_PRIVATE_REPO>\""
       ]
     },
     {
@@ -76,18 +79,19 @@
         "import zipfile\n",
         "import io\n",
         "\n",
-        "if not git_pat:\n",
-        "    raise ValueError(\"GIT_PERSONAL_ACCESS_TOKEN not set\")\n",
-        "\n",
         "zip_url = f\"https://api.github.com/repos/{git_username}/{git_repo_name}/zipball/{git_branch}\"\n",
         "\n",
         "try:\n",
-        "    # Headers for PAT authentication\n",
         "    headers = {\n",
-        "        \"Authorization\": f\"token {git_pat}\",\n",
         "        \"Accept\": \"application/vnd.github.v3+json\"\n",
         "    }\n",
         "\n",
+        "    #Authorization requires only for Private Repo.\n",
+        "    if is_private_repo:\n",
+        "        if not git_pat:\n",
+        "            raise ValueError(\"GIT_PERSONAL_ACCESS_TOKEN not set\")\n",
+        "        headers[\"Authorization\"] = f\"token {git_pat}\"\n",
+        "        \n",
         "    print(f\"Downloading ZIP from {zip_url}...\")\n",
         "    response = requests.get(zip_url, headers=headers, stream=True)\n",
         "    response.raise_for_status()\n",
@@ -105,7 +109,7 @@
         "except zipfile.BadZipFile:\n",
         "    print(\"Downloaded file is not a valid ZIP file.\")\n",
         "except Exception as e:\n",
-        "    print(f\"An unexpected error occurred: {e}\")\n"
+        "    print(f\"An unexpected error occurred: {e}\")"
       ]
     }
   ],