3 files changed, 20 insertions, 5 deletions
diff --git a/lib/spack/spack/environment.py b/lib/spack/spack/environment.py
index 18bf998438..ad95949d90 100644
--- a/lib/spack/spack/environment.py
+++ b/lib/spack/spack/environment.py
@@ -232,10 +232,15 @@ def get_env(args, cmd_name, required=False):
             '    spack -e ENV %s ...' % cmd_name)
 
 
+def _root(name):
+    """Non-validating version of root(), to be used internally."""
+    return os.path.join(env_path, name)
+
+
 def root(name):
     """Get the root directory for an environment by name."""
     validate_env_name(name)
-    return os.path.join(env_path, name)
+    return _root(name)
 
 
 def exists(name):
@@ -288,7 +293,7 @@ def all_environment_names():
     candidates = sorted(os.listdir(env_path))
     names = []
     for candidate in candidates:
-        yaml_path = os.path.join(root(candidate), manifest_name)
+        yaml_path = os.path.join(_root(candidate), manifest_name)
         if valid_env_name(candidate) and os.path.exists(yaml_path):
             names.append(candidate)
     return names
diff --git a/lib/spack/spack/test/cmd/env.py b/lib/spack/spack/test/cmd/env.py
index 76210bc562..7085373392 100644
--- a/lib/spack/spack/test/cmd/env.py
+++ b/lib/spack/spack/test/cmd/env.py
@@ -37,7 +37,7 @@ def test_add():
     assert Spec('mpileaks') in e.user_specs
 
 
-def test_env_list():
+def test_env_list(mutable_mock_env_path):
     env('create', 'foo')
     env('create', 'bar')
     env('create', 'baz')
@@ -48,6 +48,15 @@ def test_env_list():
     assert 'bar' in out
     assert 'baz' in out
 
+    # make sure `spack env list` skips invalid things in var/spack/env
+    mutable_mock_env_path.join('.DS_Store').ensure(file=True)
+    out = env('list')
+
+    assert 'foo' in out
+    assert 'bar' in out
+    assert 'baz' in out
+    assert '.DS_Store' not in out
+
 
 def test_env_remove(capfd):
     env('create', 'foo')
diff --git a/lib/spack/spack/test/conftest.py b/lib/spack/spack/test/conftest.py
index ad0644da3e..afa210a87a 100644
--- a/lib/spack/spack/test/conftest.py
+++ b/lib/spack/spack/test/conftest.py
@@ -703,8 +703,9 @@ def mock_svn_repository(tmpdir_factory):
 def mutable_mock_env_path(tmpdir_factory):
     """Fixture for mocking the internal spack environments directory."""
     saved_path = spack.environment.env_path
-    spack.environment.env_path = str(tmpdir_factory.mktemp('mock-env-path'))
-    yield spack.environment.env_path
+    mock_path = tmpdir_factory.mktemp('mock-env-path')
+    spack.environment.env_path = str(mock_path)
+    yield mock_path
     spack.environment.env_path = saved_path