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Description of problem:

createrepo_c cannot generate drpm repos on rhel8 as it requires /usr/bin/makedeltarpm from deltarpm package, however this package is not available in RHEL-8 and has been replaced with drpm (which is only a library).

$ createrepo --database --deltas --oldpackagedirs=/var/www/html/deltarpm-test-old/ /var/www/html/deltarpm-test-new/
Directory walk started
Directory walk done - 1 packages
Temporary output repo path: /var/www/html/deltarpm-test-new/.repodata/
Preparing sqlite DBs
Pool started (with 5 workers)
Pool finished
C_CREATEREPOLIB: Warning: Cannot generate delta /var/www/html/deltarpm-test-old/deltarpm-test-pkg-1.0-1.noarch.rpm -> /var/www/html/deltarpm-test-new/deltarpm-test-pkg-2.0-1.noarch.rpm : Failed to execute child process ?/usr/bin/makedeltarpm? (No such file or directory)

Either createrepo_c should be tought how to work with drpm, or it should not support creating deltas or we should pull deltarpm back.


Version-Release number of selected component (if applicable):
createrepo_c-0.11.0-1.el8.x86_64

*** Bug 1689205 has been marked as a duplicate of this bug. ***

I created a PR: https://github.com/rpm-software-management/createrepo_c/pull/172 that switches from deltarpm to drpm.

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, 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/RHBA-2020:1620