Fix the show command

poetry/console/commands/show.py

@@ -35,8 +35,11 @@ lists all packages available."""
     def handle(self):
         from clikit.utils.terminal import Terminal
 
-        from poetry.core.semver import Version
+        from poetry.io.null_io import NullIO
+        from poetry.puzzle.solver import Solver
         from poetry.repositories.installed_repository import InstalledRepository
+        from poetry.repositories.pool import Pool
+        from poetry.repositories.repository import Repository
         from poetry.utils.helpers import get_package_version_display_string
 
         package = self.argument("package")
@@ -48,7 +51,7 @@ lists all packages available."""
             self._args.set_option("latest", True)
 
         include_dev = not self.option("no-dev")
-        locked_repo = self.poetry.locker.locked_repository(include_dev)
+        locked_repo = self.poetry.locker.locked_repository(True)
 
         # Show tree view if requested
         if self.option("tree") and not package:
@@ -65,6 +68,25 @@ lists all packages available."""
         table = self.table(style="compact")
         # table.style.line_vc_char = ""
         locked_packages = locked_repo.packages
+        pool = Pool()
+        pool.add_repository(locked_repo)
+        solver = Solver(
+            self.poetry.package,
+            pool=pool,
+            installed=Repository(),
+            locked=locked_repo,
+            io=NullIO(),
+        )
+        solver.provider.load_deferred(False)
+        with solver.use_environment(self.env):
+            ops = solver.solve()
+
+        required_locked_packages = set([op.package for op in ops if not op.skipped])
+
+        if self.option("no-dev"):
+            required_locked_packages = [
+                p for p in locked_packages if p.category == "main"
+            ]
 
         if package:
             pkg = None
@@ -110,19 +132,10 @@ lists all packages available."""
         latest_packages = {}
         latest_statuses = {}
         installed_repo = InstalledRepository.load(self.env)
-        skipped = []
-
-        python = Version.parse(".".join([str(i) for i in self.env.version_info[:3]]))
 
         # Computing widths
         for locked in locked_packages:
-            python_constraint = locked.python_constraint
-            if not python_constraint.allows(python) or not self.env.is_valid_for_marker(
-                locked.marker
-            ):
-                skipped.append(locked)
-
-                if not show_all:
+            if locked not in required_locked_packages and not show_all:
                 continue
 
             current_length = len(locked.pretty_name)
@@ -179,7 +192,7 @@ lists all packages available."""
             color = "cyan"
             name = locked.pretty_name
             install_marker = ""
-            if locked in skipped:
+            if locked not in required_locked_packages:
                 if not show_all:
                     continue
 

poetry/mixology/version_solver.py

@@ -340,7 +340,12 @@ class VersionSolver:
                 # only has one version to choose from.
                 return 1
 
-            if dependency.name in self._locked:
+            locked = self._get_locked(dependency)
+            if locked and (
+                dependency.constraint.allows(locked.version)
+                or locked.is_prerelease()
+                and dependency.constraint.allows(locked.version.next_patch)
+            ):
                 return 1
 
             # VCS, URL, File or Directory dependencies
@@ -377,8 +382,6 @@ class VersionSolver:
                 version = packages[0]
             except IndexError:
                 version = None
-        else:
-            version = locked
 
             if version is None:
                 # If there are no versions that satisfy the constraint,
@@ -388,6 +391,8 @@ class VersionSolver:
                 )
 
                 return dependency.complete_name
+        else:
+            version = locked
 
         version = self._provider.complete_package(version)
 
@@ -451,10 +456,10 @@ class VersionSolver:
             )
 
     def _get_locked(self, dependency):  # type: (Dependency) -> Union[Package, None]
-        if dependency.complete_name in self._use_latest:
+        if dependency.name in self._use_latest:
             return
 
-        locked = self._locked.get(dependency.complete_name)
+        locked = self._locked.get(dependency.name)
         if not locked:
             return
 

poetry/puzzle/provider.py

@@ -67,6 +67,7 @@ class Provider:
         self._in_progress = False
         self._overrides = {}
         self._deferred_cache = {}
+        self._load_deferred = True
 
     @property
     def pool(self):  # type: () -> Pool
@@ -78,6 +79,9 @@ class Provider:
     def set_overrides(self, overrides):
         self._overrides = overrides
 
+    def load_deferred(self, load_deferred):  # type: (bool) -> None
+        self._load_deferred = load_deferred
+
     @contextmanager
     def use_environment(self, env):  # type: (Env) -> Provider
         original_env = self._env
@@ -436,6 +440,7 @@ class Provider:
         else:
             requires = package.requires
 
+        if self._load_deferred:
             # Retrieving constraints for deferred dependencies
             for r in requires:
                 if r.is_directory():

poetry/puzzle/solver.py

@@ -386,9 +386,11 @@ class PackageNode(DFSNode):
                 continue
 
             for pkg in self.packages:
-                if (
-                    pkg.complete_name == dependency.complete_name
-                    and dependency.constraint.allows(pkg.version)
+                if pkg.complete_name == dependency.complete_name and (
+                    dependency.constraint.allows(pkg.version)
+                    or dependency.allows_prereleases()
+                    and pkg.version.is_prerelease()
+                    and dependency.constraint.allows(pkg.version.stable)
                 ):
                     # If there is already a child with this name
                     # we merge the requirements

poetry/repositories/repository.py

@@ -44,7 +44,7 @@ class Repository(BaseRepository):
         if not isinstance(constraint, VersionConstraint):
             constraint = parse_constraint(constraint)
 
-        allow_prereleases = dependency.allows_prereleases
+        allow_prereleases = dependency.allows_prereleases()
         if isinstance(constraint, VersionRange):
             if (
                 constraint.max is not None
@@ -68,7 +68,10 @@ class Repository(BaseRepository):
                         ignored_pre_release_packages.append(package)
                     continue
 
-                if constraint.allows(package.version):
+                if constraint.allows(package.version) or (
+                    package.is_prerelease()
+                    and constraint.allows(package.version.next_patch)
+                ):
                     packages.append(package)
 
         return packages or ignored_pre_release_packages

tests/fixtures/project_with_local_dependencies/pyproject.toml

@@ -27,7 +27,7 @@ python = "~2.7 || ^3.4"
 demo = { path = "../distributions/demo-0.1.0-py2.py3-none-any.whl" }
 
 # Dir dependency with setup.py
-my-package = { path = "../project_with_setup/" }
+project-with-setup = { path = "../project_with_setup/" }
 
 
 [tool.poetry.scripts]

tests/fixtures/project_with_setup/my_package.egg-info/PKG-INFO → tests/fixtures/project_with_setup/project_with_setup.egg-info/PKG-INFO

 Metadata-Version: 1.0
-Name: my-package
+Name: project-with-setup
 Version: 0.1.2
 Summary: Demo project.
 Home-page: https://github.com/demo/demo

tests/fixtures/project_with_setup/setup.py

@@ -4,7 +4,7 @@ from setuptools import setup
 
 
 kwargs = dict(
-    name="my-package",
+    name="project-with-setup",
     license="MIT",
     version="0.1.2",
     description="Demo project.",

tests/installation/fixtures/with-directory-dependency-setuptools.test

@@ -7,7 +7,15 @@ optional = false
 python-versions = "*"
 
 [[package]]
-name = "my-package"
+name = "pendulum"
+version = "1.4.4"
+description = ""
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "project-with-setup"
 version = "0.1.2"
 develop = false
 description = "Demo project."
@@ -23,14 +31,6 @@ url = "tests/fixtures/project_with_setup"
 cachy = {version = ">=0.2.0", extras = ["msgpack"]}
 pendulum = ">=1.4.4"
 
-[[package]]
-name = "pendulum"
-version = "1.4.4"
-description = ""
-category = "main"
-optional = false
-python-versions = "*"
-
 [metadata]
 python-versions = "*"
 lock-version = "1.1"
@@ -38,5 +38,5 @@ content-hash = "123456789"
 
 [metadata.files]
 cachy = []
-my-package = []
+project-with-setup = []
 pendulum = []

tests/installation/test_installer.py

@@ -891,7 +891,7 @@ def test_run_installs_with_local_setuptools_directory(
 ):
     file_path = fixtures_dir / "project_with_setup/"
     package.add_dependency(
-        Factory.create_dependency("my-package", {"path": str(file_path)})
+        Factory.create_dependency("project-with-setup", {"path": str(file_path)})
     )
 
     repo.add_package(get_package("pendulum", "1.4.4"))

tests/installation/test_installer_old.py

@@ -859,7 +859,7 @@ def test_run_installs_with_local_setuptools_directory(
 ):
     file_path = fixtures_dir / "project_with_setup/"
     package.add_dependency(
-        Factory.create_dependency("my-package", {"path": str(file_path)})
+        Factory.create_dependency("project-with-setup", {"path": str(file_path)})
     )
 
     repo.add_package(get_package("pendulum", "1.4.4"))