Spack BundlePackage: a group of other packages (#11981)

This adds a special package type to Spack which is used to aggregate
a set of packages that a user might commonly install together; it
does not include any source code itself and does not require a
download URL like other Spack packages. It may include an 'install'
method to generate scripts, and Spack will run post-install hooks
(including module generation).

* Add new BundlePackage type
* Update the Xsdk package to be a BundlePackage and remove the
  'install' method (previously it had a noop install method)
* "spack create --template" now takes "bundle" as an option
* Rename cmd_create_repo fixture to "mock_test_repo" and relocate it
  to shared pytest fixtures
* Add unit tests for BundlePackage behavior

1 files changed, 19 insertions, 0 deletions

diff --git a/var/spack/repos/builtin.mock/packages/noversion/package.py b/var/spack/repos/builtin.mock/packages/noversion/package.py
new file mode 100644
index 0000000000..40889a6a11
--- /dev/null
+++ b/var/spack/repos/builtin.mock/packages/noversion/package.py
@@ -0,0 +1,19 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class Noversion(Package):
+    """
+    Simple package with no version, which should be rejected since a version
+    is required.
+    """
+
+    homepage = "http://www.example.com"
+    url      = "http://www.example.com/a-1.0.tar.gz"
+
+    def install(self, spec, prefix):
+        touch(join_path(prefix, 'an_installation_file'))