Re: [gentoo-user] New profile 17: How urgent is the rebuild of world technically?

[Neil Bothwick]

On Thu, 7 Dec 2017 00:59:33 +0100, Frank Steinmetzger wrote:

> > How does a restarted emerge @world recognizes packages, which are
> > already compiled according to the new standard?  
> 
> I “circumvent” those questions by doing:
> emerge -pveD world > worldlist
> emerge -1O $(cat worldlist)
> 
> If the system for whatever reason fails and I need to interrupt the
> merge, I simply remove the lines from worldlist that have already been
> built and then repeat the last command. Plus I can exclude some
> packages that don’t need a rebuild: -bins, -docs, virtuals, most perl
> and tex packages and so on. This saves a bit of time on the slower
> laptop.

I wrote a script to handle this some years ago, and it has come in handy
this week. It emerges all packages that have not been done since a given
time.

In this case, I run

mergeolderthan -r glibc

since glibc was emerged right before the world emerge

#!/bin/bash

EMERGE_ARGS="--oneshot --keep-going"

usage() {
        echo -e "\nUsage: $(basename $0) [-f file] [-r 
category/package[-version] [-h]"
        echo "    -f re-emerge all packages older than this file"
        echo "    -r re-emerge all packages older than this package"
        echo "    -h Show this text"
        echo -e "\n    All other options are passed to the emerge command"
        echo -e "$*"
        exit
        }

while getopts f:r:pvlh ARG; do
        case "${ARG}" in
                f) REFFILE=${OPTARG} ;;
                r) REFFILE=$(ls -1 /var/db/pkg/${OPTARG}*/environment.bz2 | 
head -n 1) ;;
                p) EMERGE_ARGS="${EMERGE_ARGS} --pretend" ;;
                v) EMERGE_ARGS="${EMERGE_ARGS} --verbose" ;;
                l) LIST="y" ;;
                h) usage ;;
                esac
        done
shift $(expr ${OPTIND} - 1)

[[ "${REFFILE}" ]] || usage "\nYou must specify a reference with -f or -r\n"
[[ -f ${REFFILE} ]] || usage "\n${REFFILE} not found\n"

PKGLIST=$(mktemp -t mergeolderthan.XXXXXXXX)

emerge -ep --exclude gentoo-sources @world | grep -v sys-kernel/gentoo-sources 
| awk -F] '/^\[ebuild/ {print $2}' | awk '{print $1}' | while read PKG; do
        if [[ /var/db/pkg/${PKG}/environment.bz2 -ot ${REFFILE} ]]; then
                echo "=${PKG}" >>$PKGLIST
                fi
        done

if [[ "${LIST}" ]]; then
        cat ${PKGLIST} && rm -f ${PKGLIST}
else
        cat ${PKGLIST} | xargs --no-run-if-empty emerge ${EMERGE_ARGS} && rm -f 
${PKGLIST}
        fi



-- 
Neil Bothwick

Hickory Dickory Dock, The mice ran up the clock, The clock struck one, The
others escaped with minor injuries.

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