Add template creation test, --skip-editor option (#11970)

* Add template creation test
* Added --skip-editor option to "spack create": normally
  "spack create" opens an editor for the user after generating a
  package file; when the --skip-editor option is used, "spack create"
  only generates the package file and does not open an editor
* Added --skip-editor option to bash completion

lib/spack/spack/cmd/create.py

@@ -393,6 +393,9 @@ def setup_parser(subparser):
     subparser.add_argument(
         '-f', '--force', action='store_true',
         help="overwrite any existing package file with the same name")
+    subparser.add_argument(
+        '--skip-editor', action='store_true',
+        help="skip the edit session for the package (e.g., automation)")
 
 
 class BuildSystemGuesser:
@@ -671,5 +674,6 @@ def create(parser, args):
     package.write(pkg_path)
     tty.msg("Created package file: {0}".format(pkg_path))
 
-    # Open up the new package file in your $EDITOR
+    # Optionally open up the new package file in your $EDITOR
+    if not args.skip_editor:
         editor(pkg_path)

lib/spack/spack/test/cmd/create.py

@@ -0,0 +1,57 @@
+# 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)
+
+import argparse
+import os
+import pytest
+
+import spack.cmd.create
+import spack.util.editor
+
+from spack.main import SpackCommand
+
+
+create = SpackCommand('create')
+
+
+@pytest.fixture("module")
+def cmd_create_repo(tmpdir_factory):
+    repo_namespace = 'cmd_create_repo'
+    repodir = tmpdir_factory.mktemp(repo_namespace)
+    repodir.ensure(spack.repo.packages_dir_name, dir=True)
+    yaml = repodir.join('repo.yaml')
+    yaml.write("""
+repo:
+    namespace: cmd_create_repo
+""")
+
+    repo = spack.repo.RepoPath(str(repodir))
+    with spack.repo.swap(repo):
+        yield repo, repodir
+
+
+@pytest.fixture(scope='module')
+def parser():
+    """Returns the parser for the module"""
+    prs = argparse.ArgumentParser()
+    spack.cmd.create.setup_parser(prs)
+    return prs
+
+
+def test_create_template(parser, cmd_create_repo):
+    """Test template creation."""
+    repo, repodir = cmd_create_repo
+
+    name = 'test-package'
+    args = parser.parse_args(['--skip-editor', name])
+    spack.cmd.create.create(parser, args)
+
+    filename = repo.filename_for_package_name(name)
+    assert os.path.exists(filename)
+
+    with open(filename, 'r') as package_file:
+        content = ' '.join(package_file.readlines())
+        for entry in [r'TestPackage(Package)', r'def install(self']:
+            assert content.find(entry) > -1

share/spack/spack-completion.bash

@@ -352,7 +352,7 @@ function _spack_create {
     if $list_options
     then
         compgen -W "-h --help --keep-stage -n --name -t --template -r --repo
-                    -N --namespace -f --force" -- "$cur"
+                    -N --namespace -f --force --skip-editor" -- "$cur"
     fi
 }