Allow editable packages in requirements.in when using --generate-hashes

piptools/repositories/pypi.py

@@ -159,13 +159,16 @@ def get_dependencies(self, ireq):
 
     def get_hashes(self, ireq):
         """
-        Given a pinned InstallRequire, returns a set of hashes that represent
-        all of the files for a given requirement. It is not acceptable for an
-        editable or unpinned requirement to be passed to this function.
+        Given an InstallRequirement, return a set of hashes that represent all
+        of the files for a given requirement. Editable requirements return an
+        empty set. Unpinned requirements raise a TypeError.
         """
+        if ireq.editable:
+            return set()
+
         if not is_pinned_requirement(ireq):
             raise TypeError(
-                "Expected pinned requirement, not unpinned or editable, got {}".format(ireq))
+                "Expected pinned requirement, got {}".format(ireq))
 
         # We need to get all of the candidates that match our current version
         # pin, these will represent all of the files that could possibly

tests/test_cli.py

@@ -315,3 +315,26 @@ def test_upgrade_packages_option(tmpdir):
         assert out.exit_code == 0
         assert 'small-fake-a==0.1' in out.output
         assert 'small-fake-b==0.2' in out.output
+
+
+def test_generate_hashes_with_editable():
+    runner = CliRunner()
+    with runner.isolated_filesystem():
+        with open('requirements.in', 'w') as fp:
+            fp.write('-e git+https://github.com/django/django.git@1.11.1#egg=django\n')
+            fp.write('pytz==2017.2\n')
+        out = runner.invoke(cli, ['--generate-hashes'])
+    expected = (
+        '#\n'
+        '# This file is autogenerated by pip-compile\n'
+        '# To update, run:\n'
+        '#\n'
+        '#    pip-compile --generate-hashes --output-file requirements.txt requirements.in\n'
+        '#\n'
+        '-e git+https://github.com/django/django.git@1.11.1#egg=django\n'
+        'pytz==2017.2 \\\n'
+        '    --hash=sha256:d1d6729c85acea5423671382868627129432fba9a89ecbb248d8d1c7a9f01c67 \\\n'
+        '    --hash=sha256:f5c056e8f62d45ba8215e5cb8f50dfccb198b4b9fbea8500674f3443e4689589\n'
+    )
+    assert out.exit_code == 0
+    assert expected in out.output

tests/test_repository_pypi.py

@@ -63,3 +63,12 @@ def test_generate_hashes_without_interfering_with_each_other(from_line):
     repository = PyPIRepository(pip_options, session)
     repository.get_hashes(from_line('cffi==1.9.1'))
     repository.get_hashes(from_line('matplotlib==2.0.2'))
+
+
+def test_get_hashes_editable_empty_set(from_editable):
+    pip_command = get_pip_command()
+    pip_options, _ = pip_command.parse_args([])
+    session = pip_command._build_session(pip_options)
+    repository = PyPIRepository(pip_options, session)
+    ireq = from_editable('git+https://github.com/django/django.git#egg=django')
+    assert repository.get_hashes(ireq) == set()