Bugfix: terminate if a spack.yaml include path does not exist (#18074)

lib/spack/spack/environment.py

@@ -812,6 +812,7 @@ def included_config_scopes(self):
         # load config scopes added via 'include:', in reverse so that
         # highest-precedence scopes are last.
         includes = config_dict(self.yaml).get('include', [])
+        missing = []
         for i, config_path in enumerate(reversed(includes)):
             # allow paths to contain spack config/environment variables, etc.
             config_path = substitute_path_variables(config_path)
@@ -826,15 +827,23 @@ def included_config_scopes(self):
                 config_name = 'env:%s:%s' % (
                     self.name, os.path.basename(config_path))
                 scope = spack.config.ConfigScope(config_name, config_path)
-            else:
+            elif os.path.exists(config_path):
                 # files are assumed to be SingleFileScopes
                 base, ext = os.path.splitext(os.path.basename(config_path))
                 config_name = 'env:%s:%s' % (self.name, base)
                 scope = spack.config.SingleFileScope(
                     config_name, config_path, spack.schema.merged.schema)
+            else:
+                missing.append(config_path)
+                continue
 
             scopes.append(scope)
 
+        if missing:
+            msg = 'Detected {0} missing include path(s):'.format(len(missing))
+            msg += '\n   {0}'.format('\n   '.join(missing))
+            tty.die('{0}\nPlease correct and try again.'.format(msg))
+
         return scopes
 
     def env_file_config_scope_name(self):

lib/spack/spack/test/cmd/env.py

@@ -525,6 +525,28 @@ def test_env_with_config():
                for x in e._get_environment_specs())
 
 
+def test_with_config_bad_include(env_deactivate, capfd):
+    env_name = 'test_bad_include'
+    test_config = """\
+spack:
+  include:
+  - /no/such/directory
+  - no/such/file.yaml
+"""
+    _env_create(env_name, StringIO(test_config))
+
+    e = ev.read(env_name)
+    with pytest.raises(SystemExit):
+        with e:
+            e.concretize()
+
+    out, err = capfd.readouterr()
+
+    assert 'missing include' in err
+    assert '/no/such/directory' in err
+    assert 'no/such/file.yaml' in err
+
+
 def test_env_with_included_config_file():
     test_config = """\
 env: