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Bug 1693712 - Switch to a string for RPM calls
Summary: Switch to a string for RPM calls
Status: NEW
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: rpmlint
Version: 8.0
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: 8.0
Assignee: Thomas Woerner
QA Contact: BaseOS QE Security Team
Depends On:
Blocks: 1631292
TreeView+ depends on / blocked
Reported: 2019-03-28 14:11 UTC by Panu Matilainen
Modified: 2019-03-28 14:12 UTC (History)
0 users

Fixed In Version:
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Type: Bug
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Description Panu Matilainen 2019-03-28 14:11:46 UTC
Description of problem:

Rpm's python3 API has been totally braindamaged all this time but people are only noticing now that it's starting to get used. 

We're changing rpm to return all string data as surrogate-escaped utf-8 python strings everywhere (instead of bytes with unknown encoding that the API doesn't otherwise even accept, see bug 1631292). This makes most rpm-scripts written for python2 just work with python3 too (from the rpm pov).

Most software that has kept python2 compatibility are automatically compatible with the fixed API, but unfortunately python3-only users like rpmlint need fixing for the new behavior.

There's at least one affected place in rpmlint, which will after the change start failing with the following traceback:

Traceback (most recent call last):
  File "/usr/bin/rpmlint", line 378, in <module>
  File "/usr/bin/rpmlint", line 166, in main
  File "/usr/bin/rpmlint", line 223, in runChecks
  File "/usr/share/rpmlint/", line 695, in check
    self.check_summary(pkg, lang, ignored_words)
  File "/usr/share/rpmlint/", line 903, in check_summary
    if not Pkg.is_utf8_bytestr(summary):
  File "/usr/share/rpmlint/", line 168, in is_utf8_bytestr
AttributeError: 'str' object has no attribute 'decode'

As the broken rpm versions are widely in use, it's best to keep compatibility with both initially. One possible way to fix this is simply:

---	2019-03-28 16:06:54.491218904 +0200
+++	2019-03-28 16:07:13.412186582 +0200
@@ -168,6 +168,8 @@
     except UnicodeError:
         return False
+    except AttributeError:
+        return True
     return True

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