apt_rpm: fix upgrade of local RPM not present in repository (#9161) (#12039)

changelogs/fragments/9161-apt-rpm-local-rpm-upgrade.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "apt_rpm - fix upgrade of local RPM not present in repository (https://github.com/ansible-collections/community.general/issues/9161, https://github.com/ansible-collections/community.general/pull/12039)."

plugins/modules/apt_rpm.py

@@ -151,17 +151,30 @@ def local_rpm_package_name(path):
     """return package name of a local rpm passed in.
     Inspired by ansible.builtin.yum"""
 
+    header = get_local_rpm_header(path)
+    if header is None:
+        return None
+
+    return to_native(header[rpm.RPMTAG_NAME])
+
+
+def get_local_rpm_header(path):
+    """return rpm header of a local rpm file."""
     ts = rpm.TransactionSet()
     ts.setVSFlags(rpm._RPMVSF_NOSIGNATURES)
     fd = os.open(path, os.O_RDONLY)
     try:
-        header = ts.hdrFromFdno(fd)
+        return ts.hdrFromFdno(fd)
     except rpm.error:
         return None
     finally:
         os.close(fd)
 
-    return to_native(header[rpm.RPMTAG_NAME])
+
+def get_installed_rpm_header(name):
+    """return rpm header of an installed package."""
+    ts = rpm.TransactionSet()
+    return next(ts.dbMatch(rpm.RPMTAG_NAME, name), None)
 
 
 def query_package(module, name):
@@ -171,20 +184,31 @@ def query_package(module, name):
     return rc == 0
 
 
-def check_package_version(module, name):
+def check_package_version(module, name, local_rpm_path):
     # compare installed and candidate version
     # if newest version already installed return True
     # otherwise return False
 
-    rc, out, err = module.run_command([APT_CACHE, "policy", name], environ_update={"LANGUAGE": "C", "LC_ALL": "C"})
-    installed = re.split("\n |: ", out)[2]
-    candidate = re.split("\n |: ", out)[4]
-    return installed >= candidate
+    if local_rpm_path is not None:
+        local_hdr = get_local_rpm_header(local_rpm_path)
+        if local_hdr is None:
+            module.fail_json(msg=f"Failed to read version from local RPM file: {local_rpm_path}")
+        inst_hdr = get_installed_rpm_header(name)
+        if inst_hdr is None:
+            return False
+        result = rpm.versionCompare(inst_hdr, local_hdr)
+        return result >= 0
+    else:
+        rc, out, err = module.run_command([APT_CACHE, "policy", name], environ_update={"LANGUAGE": "C", "LC_ALL": "C"})
+        installed = re.split("\n |: ", out)[2]
+        candidate = re.split("\n |: ", out)[4]
+        return installed >= candidate
 
 
 def query_package_provides(module, name, allow_upgrade=False):
     # rpm -q returns 0 if the package is installed,
     # 1 if it is not installed
+    local_rpm_path = None
     if name.endswith(".rpm"):
         # Likely a local RPM file
         if not HAS_RPM_PYTHON:
@@ -193,13 +217,14 @@ def query_package_provides(module, name, allow_upgrade=False):
                 exception=RPM_PYTHON_IMPORT_ERROR,
             )
 
+        local_rpm_path = name
         name = local_rpm_package_name(name)
 
     rc, out, err = module.run_command([RPM_PATH, "-q", "--provides", name])
     if rc == 0:
         if not allow_upgrade:
             return True
-        if check_package_version(module, name):
+        if check_package_version(module, name, local_rpm_path):
             return True
     return False