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Description of problem:

dnf bash completion does not work without /usr/bin/python3

Version-Release number of selected component (if applicable):

4.2.7
How reproducible:

Steps to Reproduce:
1.Install system without python3 package and anything providing /usr/bin/python3
2.Ensure dnf and bash-completion are installed and enabled
3.start bash
4.type "dnf i" (with space)
5.press TAB 3 times


Actual results:
nothing

Expected results:
all subcommands beginning with "i" should be listed (including "info" and "install")

Additional info:

Caused by an upstream completion script, which use either /usr/bin/python3 or /usr/libexec/system-python for dnf-3. RHEL 8 uses /usr/libexec/platform-python instead.

I believe this was already fixed by: https://github.com/rpm-software-management/dnf/pull/1562

Yes, this is fixed upstream since 4.2.18.  It's still an issue in RHEL8's dnf pending a backport or a rebase.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (yum bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2020:4510