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.