Fix local package installation

When packaging the dependencies only the first local package would be
included in the final bundle. This change adds support for any number
of local directory links to be treated as buildable dependencies. Tests
were also added for the case of 1 or 2 local directory links specified
in the requirements.txt.

chalice/deploy/packager.py

@@ -743,8 +743,8 @@ def download_all_dependencies(self, requirements_filename, directory):
                 raise NoSuchPackageError(str(package_name))
             raise PackageDownloadError(error)
         stdout = out.decode()
-        match = re.search(self._LINK_IS_DIR_PATTERN, stdout)
-        if match:
+        matches = re.finditer(self._LINK_IS_DIR_PATTERN, stdout)
+        for match in matches:
             wheel_package_path = str(match.group(1))
             # Looks odd we do not check on the error status of building the
             # wheel here. We can assume this is a valid package path since

tests/unit/deploy/test_packager.py

@@ -208,6 +208,36 @@ def test_download_wheels_no_wheels(self, pip_factory):
         runner.download_manylinux_wheels('cp36m', [], 'directory')
         assert len(pip.calls) == 0
 
+    def test_does_find_local_directory(self, pip_factory):
+        pip, runner = pip_factory()
+        pip.add_return((0,
+                        (b"Processing ../local-dir\n"
+                         b"  Link is a directory,"
+                         b" ignoring download_dir"),
+                        b''))
+        runner.download_all_dependencies('requirements.txt', 'directory')
+        assert len(pip.calls) == 2
+        assert pip.calls[1].args == ['wheel', '--no-deps', '--wheel-dir',
+                                     'directory', '../local-dir']
+
+    def test_does_find_multiple_local_directories(self, pip_factory):
+        pip, runner = pip_factory()
+        pip.add_return((0,
+                        (b"Processing ../local-dir-1\n"
+                         b"  Link is a directory,"
+                         b" ignoring download_dir"
+                         b"\nsome pip output...\n"
+                         b"Processing ../local-dir-2\n"
+                         b"  Link is a directory,"
+                         b" ignoring download_dir"),
+                        b''))
+        runner.download_all_dependencies('requirements.txt', 'directory')
+        assert len(pip.calls) == 3
+        assert pip.calls[1].args == ['wheel', '--no-deps', '--wheel-dir',
+                                     'directory', '../local-dir-1']
+        assert pip.calls[2].args == ['wheel', '--no-deps', '--wheel-dir',
+                                     'directory', '../local-dir-2']
+
     def test_raise_no_such_package_error(self, pip_factory):
         pip, runner = pip_factory()
         pip.add_return((1, b'',