[policies] add auxiliary function _get_pkg_name_for_binary

In some cases, we need to determine what package provides given
binary. This auxiliary function implements it - so far it works
for and will be used by archive methods.

Related to: #1196

Signed-off-by: Pavel Moravec <pmoravec@redhat.com>

2 files changed, 12 insertions, 0 deletions

diff --git a/sos/policies/__init__.py b/sos/policies/__init__.py
index b5cfc819..047b646f 100644
--- a/sos/policies/__init__.py
+++ b/sos/policies/__init__.py
@@ -321,6 +321,12 @@ No changes will be made to system configuration.
         )
         return time.strftime(nstr)
 
+    # for some specific binaries like "xz", we need to determine package
+    # providing it; that is policy specific. By default return the binary
+    # name itself until particular policy overwrites it
+    def _get_pkg_name_for_binary(self, binary):
+        return binary
+
     def get_tmp_dir(self, opt_tmp_dir):
         if not opt_tmp_dir:
             return tempfile.gettempdir()
diff --git a/sos/policies/debian.py b/sos/policies/debian.py
index 15648d5d..358e831b 100644
--- a/sos/policies/debian.py
+++ b/sos/policies/debian.py
@@ -26,6 +26,12 @@ class DebianPolicy(LinuxPolicy):
 
         self.valid_subclasses = [DebianPlugin]
 
+    def _get_pkg_name_for_binary(self, binary):
+        # for binary not specified inside {..}, return binary itself
+        return {
+            "xz": "xz-utils"
+        }.get(binary, binary)
+
     @classmethod
     def check(cls):
         """This method checks to see if we are running on Debian.