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action_utils: Workaround problem with setting debconf answers

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Closes: #1303.

Test:

Reproduce the problem with debconf-set-selections. Install tt-rss. run
debconf-set

apt install tt-rss
echo 'tt-rss tt-rss/database-type string pgsql' | debconf-set-selections
apt purge tt-rss
echo 'tt-rss tt-rss/database-type string pgsql' | debconf-set-selections
error: Cannot find a question for tt-rss/database-type

Then run try to install ttrss without patch and observe that it fails. Apply
the patch and see that ttrss is installed properly. Observe that database
configured in /etc/ttrss/database.php is 'pgsql'.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>
This commit is contained in:
Sunil Mohan Adapa 2019-08-21 15:53:17 -07:00 committed by James Valleroy
parent ca8ea9427c
commit 1de2b96bc4
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GPG Key ID: 77C0C75E7B650808
1 changed files with 8 additions and 0 deletions
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8
plinth/action_utils.py
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@ -531,6 +531,14 @@ Owners: {package}
def debconf_set_selections(presets):
"""Answer debconf questions before installing a package."""
try:
# Workaround Debian Bug #487300. In some situations, debconf complains
# it can't find the question being answered even though it is supposed
# to create a dummy question for it.
subprocess.run(['/usr/share/debconf/fix_db.pl'], check=True)
except (FileNotFoundError, PermissionError):
pass
presets = '\n'.join(presets)
subprocess.check_output(['debconf-set-selections'], input=presets.encode())