bugfix: install --only dependencies works in env (#13090)

* bugfix: install --only dependents works in env

includes regression testing

lib/spack/spack/cmd/install.py

@@ -39,8 +39,15 @@ def update_kwargs_from_args(args, kwargs):
         'fake': args.fake,
         'dirty': args.dirty,
         'use_cache': args.use_cache,
-        'cache_only': args.cache_only
+        'cache_only': args.cache_only,
+        'explicit': True  # Always true for install command
     })
+
+    kwargs.update({
+        'install_dependencies': ('dependencies' in args.things_to_install),
+        'install_package': ('package' in args.things_to_install)
+    })
+
     if hasattr(args, 'setup'):
         setups = set()
         for arglist_s in args.setup:
@@ -188,8 +195,8 @@ def default_log_file(spec):
 def install_spec(cli_args, kwargs, abstract_spec, spec):
     """Do the actual installation."""
 
+    try:
         # handle active environment, if any
-    def install(spec, kwargs):
         env = ev.get_env(cli_args, 'install')
         if env:
             env.install(abstract_spec, spec, **kwargs)
@@ -197,17 +204,6 @@ def install(spec, kwargs):
         else:
             spec.package.do_install(**kwargs)
 
-    try:
-        if cli_args.things_to_install == 'dependencies':
-            # Install dependencies as-if they were installed
-            # for root (explicit=False in the DB)
-            kwargs['explicit'] = False
-            for s in spec.dependencies():
-                install(s, kwargs)
-        else:
-            kwargs['explicit'] = True
-            install(spec, kwargs)
-
     except spack.build_environment.InstallError as e:
         if cli_args.show_log_on_error:
             e.print_context()
@@ -242,10 +238,6 @@ def install(parser, args, **kwargs):
     # Parse cli arguments and construct a dictionary
     # that will be passed to Package.do_install API
     update_kwargs_from_args(args, kwargs)
-    kwargs.update({
-        'install_dependencies': ('dependencies' in args.things_to_install),
-        'install_package': ('package' in args.things_to_install)
-    })
 
     if args.run_tests:
         tty.warn("Deprecated option: --run-tests: use --test=all instead")

lib/spack/spack/package.py

@@ -1519,6 +1519,15 @@ def do_install(self, **kwargs):
         dirty = kwargs.get('dirty', False)
         restage = kwargs.get('restage', False)
 
+        # install_self defaults True and is popped so that dependencies are
+        # always installed regardless of whether the root was installed
+        install_self = kwargs.pop('install_package', True)
+        # explicit defaults False so that dependents are implicit regardless
+        # of whether their dependents are implicitly or explicitly installed.
+        # Spack ensures root packages of install commands are always marked to
+        # install explicit
+        explicit = kwargs.pop('explicit', False)
+
         # For external packages the workflow is simplified, and basically
         # consists in module file generation and registration in the DB
         if self.spec.external:
@@ -1568,6 +1577,9 @@ def do_install(self, **kwargs):
         if install_deps:
             Package._install_bootstrap_compiler(self, **kwargs)
 
+        if not install_self:
+            return
+
         # Then, install the package proper
         tty.msg(colorize('@*{Installing} @*g{%s}' % self.name))
 

lib/spack/spack/test/cmd/install.py

@@ -21,10 +21,13 @@
 from spack.error import SpackError
 from spack.spec import Spec
 from spack.main import SpackCommand
+import spack.environment as ev
 
 from six.moves.urllib.error import HTTPError, URLError
 
 install = SpackCommand('install')
+env = SpackCommand('env')
+add = SpackCommand('add')
 
 
 @pytest.fixture(scope='module')
@@ -600,3 +603,48 @@ def test_cache_only_fails(tmpdir, mock_fetch, install_mockery, capfd):
             assert False
         except spack.main.SpackCommandError:
             pass
+
+
+def test_install_only_dependencies(tmpdir, mock_fetch, install_mockery):
+    dep = Spec('dependency-install').concretized()
+    root = Spec('dependent-install').concretized()
+
+    install('--only', 'dependencies', 'dependent-install')
+
+    assert os.path.exists(dep.prefix)
+    assert not os.path.exists(root.prefix)
+
+
+@pytest.mark.regression('12002')
+def test_install_only_dependencies_in_env(tmpdir, mock_fetch, install_mockery,
+                                          mutable_mock_env_path):
+    env('create', 'test')
+
+    with ev.read('test'):
+        dep = Spec('dependency-install').concretized()
+        root = Spec('dependent-install').concretized()
+
+        install('-v', '--only', 'dependencies', 'dependent-install')
+
+        assert os.path.exists(dep.prefix)
+        assert not os.path.exists(root.prefix)
+
+
+@pytest.mark.regression('12002')
+def test_install_only_dependencies_of_all_in_env(
+    tmpdir, mock_fetch, install_mockery, mutable_mock_env_path
+):
+    env('create', '--without-view', 'test')
+
+    with ev.read('test'):
+        roots = [Spec('dependent-install@1.0').concretized(),
+                 Spec('dependent-install@2.0').concretized()]
+
+        add('dependent-install@1.0')
+        add('dependent-install@2.0')
+        install('--only', 'dependencies')
+
+        for root in roots:
+            assert not os.path.exists(root.prefix)
+            for dep in root.traverse(root=False):
+                assert os.path.exists(dep.prefix)

var/spack/repos/builtin.mock/packages/dependent-install/package.py

@@ -13,8 +13,10 @@ class DependentInstall(Package):
     url      = "http://www.example.com/a-1.0.tar.gz"
 
     version('1.0', '0123456789abcdef0123456789abcdef')
+    version('2.0', '0123456789abcdef0123456789abcdef')
 
-    depends_on('dependency-install')
+    depends_on('dependency-install@2.0', when='@2.0')
+    depends_on('dependency-install@1.0', when='@1.0')
 
     def install(self, spec, prefix):
         touch(join_path(prefix, 'an_installation_file'))