On 11/27/20 2:50 AM, Mayavimmer wrote:
Why only use NAME and ARCH?
As long as the source system is fully up-to-date, the EVR is probably ok
and ARCH would only be necessary if you have some multi-arch packages
installed, like for wine. Otherwise, just "NAME" is the best option.
Then you don't have to worry about packages getting updated in the meantime.
Anyway, summary of interesting points, so far:
* There is probably no ready made script, then write one.
* Let's call the two hosts Master and Clone.
* Should probably install Master-only packages first, then remove
Clone-only ones.
* Clone the Master repo configuration, possibly removing Clone-only repos?
Why or how do the two systems have different repo configurations? Are
you adding third-party repos (other than rpmfusion)?
.... But could have problems removing rpms!
Removing rpms doesn't require the source repo config.
.... And may not want redundant repos??
repos generally have fixed filenames, unless you're doing something
custom, so this won't happen.
.... Maybe solve this problem by inverting the order like this:
........ 1. Remove Clone-only rpms (ugh, could remove too much!)
........ 2. Zero Clone repo config and replace with Master repo config
........ 3. Install
* Prepare rpmlist for easy parsing, maybe use the tilde char:
.... rpm -qa --qf="%{NAME}-%{EVR}.%{ARCH}\n" # almost same as rpm -qa
.... rpm -qa --qf="%{NAME}~%{EVR}~%{ARCH}\n" # almost same as rpm -qa
* Identify special rpms to exclude from cloning:
.... *-gpg-pubkey-*
.... Some xorg rpm tied to a non default graphics card
This doesn't matter.
.... Other rpms that were installed non from repo in Master
* What to do when downgrading some rpms??
Avoid this potential issue by not including the EVR.
* Ok, here is a first attempt at the install-first-then-remove case:
.... 1. Ensure Clone repo config is the same Master's.
.... 2. Master # rpm -qa --qf="%{NAME}~%{EVR}~%{ARCH}\n"
........ | sort | grep -v gpg-pubkey > master-rpms
........ # Note: still not exactly the same as rpm -qa
.... 3. Clone # rpm -qa --qf="%{NAME}~%{EVR}~%{ARCH}\n"
........ | sort | grep -v gpg-pubkey > clone-rpms
.... 4. Compare the two lists in various ways, using tilde fields.
.... 4. Edit master-rpms to eliminate unwanted rpms.
.... 5. Clone # dnf install $(<edited-master-rpms)
.... # Now do it again to compare
.... 6. Clone # rpm -qa --qf="%{NAME}~%{EVR}~%{ARCH}\n"
........ | sort | grep -v gpg-pubkey > clone-rpms
.... 7. Clone # vimdiff edited-master-rpms clone-rpms
.... 8. Repeat until all differences are sorted out
When you get to point of removing the extra rpms from the clone, I would
suggest using "--noautoremove" with the dnf command, otherwise it might
remove more than you expect.
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