Add support for .venv virtualenvs

CHANGELOG.md

@@ -8,6 +8,7 @@
 - Added support for `git` dependencies in the `add` command.
 - Added support for `file` dependencies in the `add` command.
 - Added support for `src/` layout for packages.
+- Added automatic detection of `.venv` virtualenvs.
 
 ### Changed
 

poetry/console/commands/venv_command.py

@@ -13,7 +13,10 @@ class VenvCommand(Command):
 
         super(VenvCommand, self).initialize(i, o)
 
-        self._venv = Venv.create(o, self.poetry.package.name)
+        self._venv = Venv.create(
+            o, self.poetry.package.name,
+            cwd=self.poetry.file.parent
+        )
 
         if self._venv.is_venv() and o.is_verbose():
             o.writeln(

poetry/utils/venv.py

@@ -47,10 +47,16 @@ class Venv(object):
         self._python_implementation = None
 
     @classmethod
-    def create(cls, io, name=None):  # type: (...) -> Venv
+    def create(cls, io, name=None, cwd=None):  # type: (...) -> Venv
         if 'VIRTUAL_ENV' not in os.environ:
             # Not in a virtualenv
             # Checking if we need to create one
+
+            # First we check if there is a .venv
+            # at the root of the project.
+            if cwd and (cwd / '.venv').exists():
+                venv = cwd / '.venv'
+            else:
                 config = Config.create('config.toml')
 
                 create_venv = config.setting('settings.virtualenvs.create')