pip installer: fix typing issues for http repos

src/poetry/installation/pip_installer.py

@@ -12,6 +12,7 @@ from typing import Any
 from poetry.core.pyproject.toml import PyProjectTOML
 from poetry.core.pyproject.toml import PyProjectTOML
 
 
 from poetry.installation.base_installer import BaseInstaller
 from poetry.installation.base_installer import BaseInstaller
+from poetry.repositories.http import HTTPRepository
 from poetry.utils._compat import encode
 from poetry.utils._compat import encode
 from poetry.utils.helpers import remove_directory
 from poetry.utils.helpers import remove_directory
 from poetry.utils.pip import pip_install
 from poetry.utils.pip import pip_install
@@ -57,6 +58,7 @@ class PipInstaller(BaseInstaller):
                 )
                 )
                 args += ["--trusted-host", parsed.hostname]
                 args += ["--trusted-host", parsed.hostname]
 
 
+            if isinstance(repository, HTTPRepository):
                 if repository.cert:
                 if repository.cert:
                     args += ["--cert", str(repository.cert)]
                     args += ["--cert", str(repository.cert)]
 
 
@@ -66,13 +68,17 @@ class PipInstaller(BaseInstaller):
                 index_url = repository.authenticated_url
                 index_url = repository.authenticated_url
 
 
                 args += ["--index-url", index_url]
                 args += ["--index-url", index_url]
+
             if (
             if (
                 self._pool.has_default()
                 self._pool.has_default()
                 and repository.name != self._pool.repositories[0].name
                 and repository.name != self._pool.repositories[0].name
             ):
             ):
+                first_repository = self._pool.repositories[0]
+
+                if isinstance(first_repository, HTTPRepository):
                     args += [
                     args += [
                         "--extra-index-url",
                         "--extra-index-url",
-                    self._pool.repositories[0].authenticated_url,
+                        first_repository.authenticated_url,
                     ]
                     ]
 
 
         if update:
         if update: