emerge --resume package list save/restore ?

[Brane2]

Is there some simple way to save the list of packages that "emerge --resume" would install and to load that list back later ?

[fedeliallalinea]

One possible solution

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$ emerge -p --resume | awk 'match($0, /\[.*\]\s(.*)\sUSE.*/, group) {print "="group[1]}' > list_package_resume.txt
# cat list_package_resume.txt | xargs emerge --oneshot -p

[sammy1]

One possible solution

Code: Select all

$ emerge -p --resume | awk 'match($0, /\[.*\]\s(.*)\sUSE.*/, group) {print "="group[1]}' > list_package_resume.txt
# cat list_package_resume.txt | xargs emerge --oneshot -p

Brilliant, that does the job pretty good.

[[n00b@localhost]]

Portage is written in Python. You can access the list with the following couple of lines:

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import portage
print('\n'.join([ item[2] for item in portage.mtimedb['resume']['mergelist'] ]))

[Brane2]

One possible solution

Code: Select all

$ emerge -p --resume | awk 'match($0, /\[.*\]\s(.*)\sUSE.*/, group) {print "="group[1]}' > list_package_resume.txt
# cat list_package_resume.txt | xargs emerge --oneshot -p

I did this in the past, but:

- you get the list, but not sequence. IOW, actual original merge could ( and probably would) merge files in different sequence, which could affect the outcome. e.g. it's not the same if package X gets to be emerged before or after library Y that it depends upon.

- it's strictly serial and as such dog slow. Packages get emerged one after another, with no overlap. Original emerge would try to do them in parallel as much as possible.

You can aggregate all packages into one argument, but that tends to choke emerge, if the list is very long.

[Massimo B.]

For those having lost the resume list for any reason, I did...

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# eix '-I*' --format '<installedversions:DATESORT>' | sort -nr | cut -f2-3 > resumelist

...and manually removed the most recent lines sorted by date and the date column for getting a list of the packages not re-build by the last emerge --emptytree.
Then run...

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# emerge --oneshot -atv $(< resumelist)