Add retries to the wp theme list command

[weiiwang01]

Overview

The feedwordpress plugin, version 2022.0222, intermittently causes failures when executing the wp theme list command. To address this issue, add retries to the command execution.

Juju Events Changes

None

Module Changes

None

Library Changes

None

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated.
• The PR is tagged with appropriate label (urgent, trivial, complex)

[mthaddon]

Thx for the quick fix. We should circle back at some point, as the charm is currently sitting in blocked idle if this fails, without giving the user a way to proceed. But given this is somewhat time sensitive, I think it makes sense to land as is and address that later.

[mthaddon]

I've created #143 to ensure we follow up on this at some point (the blocked idle issue, if the reconcile loop fails).

[github-actions]

Test coverage for e8a3c2e

Name                Stmts   Miss Branch BrPart  Cover   Missing
---------------------------------------------------------------
src/charm.py          521     37    168     29    90%   197-200, 551, 582, 628, 663-664, 715-722, 727, 829->834, 833, 835, 840-841, 901, 919, 926, 1018, 1027, 1039, 1060, 1069, 1088, 1092, 1121, 1174, 1306, 1328, 1335->1337, 1380->exit, 1392, 1424, 1433-1434
src/cos.py             15      0      0      0   100%
src/exceptions.py      17      1      2      1    89%   41
src/types_.py          15      0      0      0   100%
---------------------------------------------------------------
TOTAL                 568     38    170     30    90%

Static code analysis report

Run started:2023-10-13 11:58:40.819633

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 4250
  Total lines skipped (#nosec): 1
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):