Add os product tag based on /etc/os-release

Currently, content filter based on the product-tags only works for RHEL.
The content filter method should also be usable for other OSses, like
CentOS, SuSE or even Debian/Ubuntu. With this approach, a
[os-name]-[os-version] tag is created based on /etc/os-release. The tag
is only generated and added if the feature is activated by setting
use_os_release_product=1 in /etc/rhsm/rhsm.conf

src/subscription_manager/model/__init__.py

@@ -89,22 +89,28 @@ def __getitem__(self, key):
         return self._entitlements[key]
 
 
-def find_content(ent_source, content_type=None):
+def find_content(ent_source, content_type=None, use_os_release_product=False):
     """
     Scan all entitlements looking for content of the given type. (string)
     Type will be compared case insensitive.
+    If use_os_release_product is enabled, generate a os-product-version tag and
+    add it ot the list of product_tags
 
     Returns a list of model.Content.
     """
     entitled_content = []
     content_access_entitlement_content = {}
     content_labels = set()
+    if use_os_release_product:
+        all_product_tags = add_os_product_tags(ent_source.product_tags)
+    else:
+        all_product_tags = ent_source.product_tags
     log.debug("Searching for content of type: %s" % content_type)
     for entitlement in ent_source:
         for content in entitlement.contents:
             # this is basically matching_content from repolib
             if content.content_type.lower() == content_type.lower() and content_tag_match(
-                content.tags, ent_source.product_tags
+                content.tags, all_product_tags
             ):
                 if entitlement.entitlement_type == CONTENT_ACCESS_CERT_TYPE:
                     content_access_entitlement_content[content.label] = content
@@ -119,6 +125,19 @@ def find_content(ent_source, content_type=None):
     return entitled_content
 
 
+def add_os_product_tags(product_tags):
+    """Add [os-id]-[os-version] tag to product tag list based on /etc/os-release
+
+    Returns the product_tags including the os-product tag
+    """
+    all_tags = product_tags
+
+    dist_info = HardwareCollector().get_distribution()
+    os_product = "{name}-{version}".format(name=dist_info[4], version=dist_info[1])
+    all_tags.add(os_product)
+    return all_tags
+
+
 def content_tag_match(content_tags, product_tags):
     """See if content required tags are provided by installed products.
 

src/subscription_manager/repolib.py

@@ -493,13 +493,31 @@ def get_unique_content(self):
         # assumes items in content_list are hashable
         return set(content_list)
 
+    def use_os_release_product_enabled(self):
+        try:
+            use_os_release_product = conf["rhsm"].get_int("use_os_release_product")
+        except ValueError as e:
+            log.exception(e)
+            return False
+        except configparser.Error as e:
+            log.exception(e)
+            return False
+        else:
+            if use_os_release_product is None:
+                return False
+        return bool(use_os_release_product)
+
     # Expose as public API for RepoActionInvoker.is_managed, since that
     # is used by Openshift tooling.
     # See https://bugzilla.redhat.com/show_bug.cgi?id=1223038
     def matching_content(self):
         content = []
         for content_type in ALLOWED_CONTENT_TYPES:
-            content += model.find_content(self.ent_source, content_type=content_type)
+            content += model.find_content(
+                self.ent_source,
+                content_type=content_type,
+                use_os_release_product=self.use_os_release_product_enabled(),
+            )
         return content
 
     def get_all_content(self, baseurl, ca_cert):