From cdf09bfc4a6181ab2d39a612add7ad089c8045e2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Bidoul=20=28ACSONE=29?=
 <stephane.bidoul@acsone.eu>
Date: Tue, 29 Oct 2019 09:01:05 +0100
Subject: [PATCH] remove should_use_ephemeral_cache

---
 news/7268.trivial          |  1 +
 src/pip/_internal/wheel.py | 46 +++++-------------------
 tests/unit/test_wheel.py   | 72 --------------------------------------
 3 files changed, 10 insertions(+), 109 deletions(-)
 create mode 100644 news/7268.trivial

diff --git a/news/7268.trivial b/news/7268.trivial
new file mode 100644
index 00000000000..052c8279189
--- /dev/null
+++ b/news/7268.trivial
@@ -0,0 +1 @@
+refactoring: remove should_use_ephemeral_cache
diff --git a/src/pip/_internal/wheel.py b/src/pip/_internal/wheel.py
index 451ca57e8b2..d95ff66a474 100644
--- a/src/pip/_internal/wheel.py
+++ b/src/pip/_internal/wheel.py
@@ -838,35 +838,6 @@ def should_cache(
     return False
 
 
-def should_use_ephemeral_cache(
-    req,  # type: InstallRequirement
-    should_unpack,  # type: bool
-    cache_available,  # type: bool
-    check_binary_allowed,  # type: BinaryAllowedPredicate
-):
-    # type: (...) -> Optional[bool]
-    """Return whether to build an InstallRequirement object using the
-    ephemeral cache.
-
-    :param cache_available: whether a cache directory is available for the
-        should_unpack=True case.
-
-    :return: True or False to build the requirement with ephem_cache=True
-        or False, respectively; or None not to build the requirement.
-    """
-    if not should_build(req, not should_unpack, check_binary_allowed):
-        return None
-    if not should_unpack:
-        # i.e. pip wheel, not pip install;
-        # return False, knowing that the caller will never cache
-        # in this case anyway, so this return merely means "build it".
-        # TODO improve this behavior
-        return False
-    if not cache_available:
-        return True
-    return not should_cache(req, check_binary_allowed)
-
-
 def format_command_result(
     command_args,  # type: List[str]
     command_output,  # type: str
@@ -1106,23 +1077,24 @@ def build(
         cache_available = bool(self.wheel_cache.cache_dir)
 
         for req in requirements:
-            ephem_cache = should_use_ephemeral_cache(
+            if not should_build(
                 req,
-                should_unpack=should_unpack,
-                cache_available=cache_available,
+                need_wheel=not should_unpack,
                 check_binary_allowed=self.check_binary_allowed,
-            )
-            if ephem_cache is None:
+            ):
                 continue
 
             # Determine where the wheel should go.
             if should_unpack:
-                if ephem_cache:
+                if (
+                    cache_available and
+                    should_cache(req, self.check_binary_allowed)
+                ):
+                    output_dir = self.wheel_cache.get_path_for_link(req.link)
+                else:
                     output_dir = self.wheel_cache.get_ephem_path_for_link(
                         req.link
                     )
-                else:
-                    output_dir = self.wheel_cache.get_path_for_link(req.link)
             else:
                 output_dir = self._wheel_dir
 
diff --git a/tests/unit/test_wheel.py b/tests/unit/test_wheel.py
index b530bcb6920..05413f9074e 100644
--- a/tests/unit/test_wheel.py
+++ b/tests/unit/test_wheel.py
@@ -166,78 +166,6 @@ def check_binary_allowed(req):
     assert should_cache is expected
 
 
-@pytest.mark.parametrize(
-    "base_name, should_unpack, cache_available, expected",
-    [
-        ('pendulum-2.0.4', False, False, False),
-        # The following cases test should_unpack=True.
-        # Test _contains_egg_info() returning True.
-        ('pendulum-2.0.4', True, True, False),
-        ('pendulum-2.0.4', True, False, True),
-        # Test _contains_egg_info() returning False.
-        ('pendulum', True, True, True),
-        ('pendulum', True, False, True),
-    ],
-)
-def test_should_use_ephemeral_cache__issue_6197(
-    base_name, should_unpack, cache_available, expected,
-):
-    """
-    Regression test for: https://github.com/pypa/pip/issues/6197
-    """
-    req = make_test_install_req(base_name=base_name)
-    assert not req.is_wheel
-    assert not req.link.is_vcs
-
-    always_true = Mock(return_value=True)
-
-    ephem_cache = wheel.should_use_ephemeral_cache(
-        req, should_unpack=should_unpack,
-        cache_available=cache_available, check_binary_allowed=always_true,
-    )
-    assert ephem_cache is expected
-
-
-@pytest.mark.parametrize(
-    "disallow_binaries, expected",
-    [
-        # By default (i.e. when binaries are allowed), VCS requirements
-        # should be built.
-        (False, True),
-        # Disallowing binaries, however, should cause them not to be built.
-        (True, None),
-    ],
-)
-def test_should_use_ephemeral_cache__disallow_binaries_and_vcs_checkout(
-    disallow_binaries, expected,
-):
-    """
-    Test that disallowing binaries (e.g. from passing --global-option)
-    causes should_use_ephemeral_cache() to return None for VCS checkouts.
-    """
-    req = Requirement('pendulum')
-    link = Link(url='git+https://git.example.com/pendulum.git')
-    req = InstallRequirement(
-        req=req,
-        comes_from=None,
-        constraint=False,
-        editable=False,
-        link=link,
-        source_dir='/tmp/pip-install-9py5m2z1/pendulum',
-    )
-    assert not req.is_wheel
-    assert req.link.is_vcs
-
-    check_binary_allowed = Mock(return_value=not disallow_binaries)
-
-    # The cache_available value doesn't matter for this test.
-    ephem_cache = wheel.should_use_ephemeral_cache(
-        req, should_unpack=True,
-        cache_available=True, check_binary_allowed=check_binary_allowed,
-    )
-    assert ephem_cache is expected
-
-
 def test_format_command_result__INFO(caplog):
     caplog.set_level(logging.INFO)
     actual = wheel.format_command_result(