From d48517c974ac0bb51a8a1a5dae52a39d489c20ff Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <asulfrian@zedat.fu-berlin.de>
Date: Sun, 16 Jan 2022 09:26:44 +0100
Subject: Packages: Add 'dummy' packages backend

This backend will not add any packages.
---
 schemas/packages.xsd                              |  1 +
 src/lib/Bcfg2/Server/Plugins/Packages/Dummy.py    | 35 +++++++++++++++++++++++
 src/lib/Bcfg2/Server/Plugins/Packages/__init__.py |  2 +-
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 src/lib/Bcfg2/Server/Plugins/Packages/Dummy.py

diff --git a/schemas/packages.xsd b/schemas/packages.xsd
index fc5a1356c..849be41e2 100644
--- a/schemas/packages.xsd
+++ b/schemas/packages.xsd
@@ -18,6 +18,7 @@
       <xsd:enumeration value="apt"/>
       <xsd:enumeration value="pac"/>
       <xsd:enumeration value="pkgng"/>
+      <xsd:enumeration value="dummy"/>
     </xsd:restriction>
   </xsd:simpleType>
 
diff --git a/src/lib/Bcfg2/Server/Plugins/Packages/Dummy.py b/src/lib/Bcfg2/Server/Plugins/Packages/Dummy.py
new file mode 100644
index 000000000..f47b8f22c
--- /dev/null
+++ b/src/lib/Bcfg2/Server/Plugins/Packages/Dummy.py
@@ -0,0 +1,35 @@
+""" Dummy backend for :mod:`Bcfg2.Server.Plugins.Packages` """
+
+from Bcfg2.Server.Plugins.Packages.Collection import Collection
+from Bcfg2.Server.Plugins.Packages.Source import Source
+
+
+class DummyCollection(Collection):
+    """ Handle collections of Dummy sources.  This is a no-op object
+    that simply inherits from
+    :class:`Bcfg2.Server.Plugins.Packages.Collection.Collection`,
+    overrides nothing, and defers all operations to :class:`PacSource`
+    """
+
+    def __init__(self, metadata, sources, cachepath, basepath, debug=False):
+        # we define an __init__ that just calls the parent __init__,
+        # so that we can set the docstring on __init__ to something
+        # different from the parent __init__ -- namely, the parent
+        # __init__ docstring, minus everything after ``.. -----``,
+        # which we use to delineate the actual docs from the
+        # .. autoattribute hacks we have to do to get private
+        # attributes included in sphinx 1.0 """
+        Collection.__init__(self, metadata, sources, cachepath, basepath,
+                            debug=debug)
+    __init__.__doc__ = Collection.__init__.__doc__.split(".. -----")[0]
+
+
+class DummySource(Source):
+    """ Handle Dummy sources """
+
+    #: DummySource sets the ``type`` on Package entries to "dummy"
+    ptype = 'dummy'
+
+    def __init__(self, basepath, xsource):
+        xsource.set('rawurl', 'http://example.com/')
+        Source.__init__(self, basepath, xsource)
diff --git a/src/lib/Bcfg2/Server/Plugins/Packages/__init__.py b/src/lib/Bcfg2/Server/Plugins/Packages/__init__.py
index 23ccd7b8e..95b4baa3e 100644
--- a/src/lib/Bcfg2/Server/Plugins/Packages/__init__.py
+++ b/src/lib/Bcfg2/Server/Plugins/Packages/__init__.py
@@ -57,7 +57,7 @@ class Packages(Bcfg2.Server.Plugin.Plugin,
             help="Packages backends to load",
             type=Bcfg2.Options.Types.comma_list,
             action=PackagesBackendAction,
-            default=['Yum', 'Apt', 'Pac', 'Pkgng']),
+            default=['Yum', 'Apt', 'Pac', 'Pkgng', 'Dummy']),
         Bcfg2.Options.PathOption(
             cf=("packages", "cache"), dest="packages_cache",
             help="Path to the Packages cache",
-- 
cgit v1.2.3-1-g7c22