Fix installation with non-PyPI default repository

Co-authored-by: rusty <rusty@spoqa.com>

poetry/installation/pip_installer.py

@@ -3,10 +3,9 @@
 
 from subprocess import CalledProcessError
 
+from clikit.api.io import IO
 from clikit.io import NullIO
 
-from poetry.config import Config
-from poetry.utils.helpers import get_http_basic_auth
 from poetry.utils.helpers import safe_rmtree
 
 
@@ -15,19 +14,15 @@
 except ImportError:
     import urlparse
 
+from poetry.repositories.pool import Pool
 from poetry.utils._compat import encode
 from poetry.utils.env import Env
 
 from .base_installer import BaseInstaller
 
 
 class PipInstaller(BaseInstaller):
-    def __init__(
-        self,
-        env,  # type: Env
-        io,
-        pool,
-    ):  # type: (...) -> None
+    def __init__(self, env, io, pool):  # type: (Env, IO, Pool) -> None
         self._env = env
         self._io = io
         self._pool = pool
@@ -60,8 +55,11 @@ def install(self, package, update=False):
 
             args += ["--index-url", index_url]
             if self._pool.has_default():
-                if repository.name != self._pool.default.name:
-                    args += ["--extra-index-url", self._pool.default.authenticated_url]
+                if repository.name != self._pool.repositories[0].name:
+                    args += [
+                        "--extra-index-url",
+                        self._pool.repositories[0].authenticated_url,
+                    ]
 
         if update:
             args.append("-U")

tests/installation/test_pip_installer.py

@@ -1,6 +1,7 @@
 from poetry.installation.pip_installer import PipInstaller
 from poetry.io.null_io import NullIO
 from poetry.packages.package import Package
+from poetry.repositories.legacy_repository import LegacyRepository
 from poetry.repositories.pool import Pool
 from poetry.utils.env import NullEnv
 
@@ -23,3 +24,27 @@ def test_requirement():
     )
 
     assert expected == result
+
+
+def test_install_with_non_pypi_default_repository():
+    pool = Pool()
+
+    default = LegacyRepository("default", "https://default.com")
+    another = LegacyRepository("another", "https://another.com")
+
+    pool.add_repository(default, default=True)
+    pool.add_repository(another)
+
+    installer = PipInstaller(NullEnv(), NullIO(), pool)
+
+    foo = Package("foo", "0.0.0")
+    foo.source_type = "legacy"
+    foo.source_reference = default._name
+    foo.source_url = default._url
+    bar = Package("bar", "0.1.0")
+    bar.source_type = "legacy"
+    bar.source_reference = another._name
+    bar.source_url = another._url
+
+    installer.install(foo)
+    installer.install(bar)