Fix lock downloads to use all lock info. (pex-tool#2396)

Previously, the lock target systems and requires python configuration
were left out, which could lead to critical Pip runtime patches being
left off; causing downloads to fail when they should not.

Fixes pex-tool#2395

CHANGES.md

@@ -1,5 +1,12 @@
 # Release Notes
 
+## 2.3.1
+
+This release fixes Pex to respect lock file interpreter constraints and
+target systems when downloading artifacts.
+
+* Fix lock downloads to use all lock info. (#2396)
+
 ## 2.3.0
 
 This release introduces `pex3 lock sync` as a higher-level tool that

pex/resolve/downloads.py

@@ -15,7 +15,7 @@
 from pex.pip.installation import get_pip
 from pex.pip.tool import PackageIndexConfiguration, Pip
 from pex.resolve import locker
-from pex.resolve.locked_resolve import Artifact, FileArtifact, LockConfiguration, LockStyle
+from pex.resolve.locked_resolve import Artifact, FileArtifact, LockConfiguration
 from pex.resolve.resolved_requirement import ArtifactURL, Fingerprint, PartialArtifact
 from pex.resolve.resolvers import Resolver
 from pex.result import Error
@@ -50,6 +50,7 @@ def get_downloads_dir(pex_root=None):
 @attr.s(frozen=True)
 class ArtifactDownloader(object):
     resolver = attr.ib()  # type: Resolver
+    lock_configuration = attr.ib()  # type: LockConfiguration
     target = attr.ib(factory=LocalInterpreter.create)  # type: Target
     package_index_configuration = attr.ib(
         factory=PackageIndexConfiguration.create
@@ -113,7 +114,7 @@ def _download(
         # restrictions.
         download_observer = DownloadObserver(
             analyzer=None,
-            patch_set=locker.patch(lock_configuration=LockConfiguration(style=LockStyle.UNIVERSAL)),
+            patch_set=locker.patch(lock_configuration=self.lock_configuration),
         )
         return self.pip.spawn_download_distributions(
             download_dir=download_dir,

pex/resolve/lock_resolver.py

@@ -27,6 +27,7 @@
     DownloadableArtifact,
     FileArtifact,
     LocalProjectArtifact,
+    LockConfiguration,
     VCSArtifact,
 )
 from pex.resolve.lockfile.download_manager import DownloadedArtifact, DownloadManager
@@ -281,6 +282,11 @@ def resolve_from_lock(
             file_lock_style=file_lock_style,
             downloader=ArtifactDownloader(
                 resolver=resolver,
+                lock_configuration=LockConfiguration(
+                    style=lock.style,
+                    requires_python=lock.requires_python,
+                    target_systems=lock.target_systems,
+                ),
                 target=resolved_subset.target,
                 package_index_configuration=PackageIndexConfiguration.create(
                     pip_version=pip_version,

pex/resolve/lockfile/create.py

@@ -331,6 +331,7 @@ def lock(self, downloaded):
                 dist_metadatas=dist_metadatas_by_target[target],
                 fingerprinter=ArtifactDownloader(
                     resolver=self.resolver,
+                    lock_configuration=self.lock_configuration,
                     target=target,
                     package_index_configuration=self.package_index_configuration,
                     max_parallel_jobs=self.max_parallel_jobs,

pex/version.py

@@ -1,4 +1,4 @@
 # Copyright 2015 Pex project contributors.
 # Licensed under the Apache License, Version 2.0 (see LICENSE).
 
-__version__ = "2.3.0"
+__version__ = "2.3.1"

testing/cli.py

@@ -1,28 +1,32 @@
 # Copyright 2022 Pex project contributors.
 # Licensed under the Apache License, Version 2.0 (see LICENSE).
 
-from __future__ import absolute_import, division, print_function, unicode_literals
+from __future__ import absolute_import
 
 import subprocess
 import sys
 
-from pex.typing import TYPE_CHECKING
+from pex.compatibility import to_unicode
+from pex.typing import TYPE_CHECKING, cast
 from testing import IntegResults
 
 if TYPE_CHECKING:
+    from typing import Text  # noqa
     from typing import Any
 
 
 def run_pex3(
     *args,  # type: str
-    **popen_kwargs  # type: Any
+    **kwargs  # type: Any
 ):
     # type: (...) -> IntegResults
+
+    python = cast("Text", kwargs.pop("python", to_unicode(sys.executable)))
     process = subprocess.Popen(
-        args=[sys.executable, "-mpex.cli"] + list(args),
+        args=[python, "-mpex.cli"] + list(args),
         stdout=subprocess.PIPE,
         stderr=subprocess.PIPE,
-        **popen_kwargs
+        **kwargs
     )
     stdout, stderr = process.communicate()
     return IntegResults(