Find excluded files no vcs (#590)

* Add a new test for the case where no vcs is detected

It can happens with unsupported VCS or no VCS at all (building from an
archive).
I copy the test_complete test and run it in a temporary directory where no VCS
should be detected.
I also modified the complete directory fixture directory, I can create a new
one if it's better

* Fix find_excluded_files to works without vcs

Fix #585

poetry/masonry/builders/builder.py

@@ -43,14 +43,16 @@ class Builder(object):
         # Checking VCS
         vcs = get_vcs(self._path)
         if not vcs:
-            return []
+            vcs_ignored_files = []
+        else:
+            vcs_ignored_files = vcs.get_ignored_files()
 
         explicitely_excluded = []
         for excluded_glob in self._package.exclude:
             for excluded in self._path.glob(excluded_glob):
                 explicitely_excluded.append(excluded)
 
-        ignored = vcs.get_ignored_files() + explicitely_excluded
+        ignored = vcs_ignored_files + explicitely_excluded
         result = []
         for file in ignored:
             try:

tests/masonry/builders/fixtures/complete/pyproject.toml

@@ -20,6 +20,10 @@ classifiers = [
     "Topic :: Software Development :: Libraries :: Python Modules"
 ]
 
+exclude = [
+    "**/*.xml"
+]
+
 # Requirements
 [tool.poetry.dependencies]
 python = "^3.6"

tests/masonry/builders/test_complete.py

@@ -7,6 +7,7 @@ import shutil
 import sys
 import tarfile
 import zipfile
+import tempfile
 
 from poetry import __version__
 from poetry.io import NullIO
@@ -164,6 +165,105 @@ My Package
         zip.close()
 
 
+def test_complete_no_vcs():
+    # Copy the complete fixtures dir to a temporary directory
+    module_path = fixtures_dir / "complete"
+    temporary_dir = Path(tempfile.mkdtemp()) / "complete"
+
+    shutil.copytree(module_path.as_posix(), temporary_dir.as_posix())
+
+    builder = CompleteBuilder(
+        Poetry.create(temporary_dir), NullEnv(execute=True), NullIO()
+    )
+    builder.build()
+
+    whl = temporary_dir / "dist" / "my_package-1.2.3-py3-none-any.whl"
+
+    assert whl.exists()
+
+    zip = zipfile.ZipFile(str(whl))
+
+    # Check the zipped file to be sure that included and excluded files are
+    # correctly taken account of without vcs
+    expected_name_list = [
+        "my_package/__init__.py",
+        "my_package/data1/test.json",
+        "my_package/sub_pkg1/__init__.py",
+        "my_package/sub_pkg2/__init__.py",
+        "my_package/sub_pkg2/data2/data.json",
+        "my_package-1.2.3.dist-info/entry_points.txt",
+        "my_package-1.2.3.dist-info/LICENSE",
+        "my_package-1.2.3.dist-info/WHEEL",
+        "my_package-1.2.3.dist-info/METADATA",
+        "my_package-1.2.3.dist-info/RECORD",
+    ]
+
+    assert sorted(zip.namelist()) == sorted(expected_name_list)
+
+    try:
+        entry_points = zip.read("my_package-1.2.3.dist-info/entry_points.txt")
+
+        assert (
+            decode(entry_points.decode())
+            == """\
+[console_scripts]
+extra-script=my_package.extra:main[time]
+my-2nd-script=my_package:main2
+my-script=my_package:main
+
+"""
+        )
+        wheel_data = decode(zip.read("my_package-1.2.3.dist-info/WHEEL"))
+
+        assert (
+            wheel_data
+            == """\
+Wheel-Version: 1.0
+Generator: poetry {}
+Root-Is-Purelib: true
+Tag: py3-none-any
+""".format(
+                __version__
+            )
+        )
+        wheel_data = decode(zip.read("my_package-1.2.3.dist-info/METADATA"))
+
+        assert (
+            wheel_data
+            == """\
+Metadata-Version: 2.1
+Name: my-package
+Version: 1.2.3
+Summary: Some description.
+Home-page: https://poetry.eustace.io/
+License: MIT
+Keywords: packaging,dependency,poetry
+Author: Sébastien Eustace
+Author-email: sebastien@eustace.io
+Requires-Python: >=3.6,<4.0
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Topic :: Software Development :: Build Tools
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Provides-Extra: time
+Requires-Dist: cachy[msgpack] (>=0.2.0,<0.3.0)
+Requires-Dist: cleo (>=0.6,<0.7)
+Requires-Dist: pendulum (>=1.4,<2.0); extra == "time"
+Project-URL: Documentation, https://poetry.eustace.io/docs
+Project-URL: Repository, https://github.com/sdispater/poetry
+Description-Content-Type: text/x-rst
+
+My Package
+==========
+
+"""
+        )
+    finally:
+        zip.close()
+
+
 def test_module_src():
     module_path = fixtures_dir / "source_file"
     builder = CompleteBuilder(