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# Copyright 1999-2004 Gentoo Foundation |
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# Distributed under the terms of the GNU General Public License v2 |
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# $Header: /var/cvsroot/gentoo-x86/eclass/versionator.eclass,v 1.2 2004/09/10 21:42:21 ciaranm Exp $ |
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# |
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# Original Author: Ciaran McCreesh <ciaranm@gentoo.org> |
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# |
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# This eclass provides a uniform way of handling ebuilds which have very high |
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# build requirements in terms of memory or disc space. It provides a function |
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# which should usually be called during pkg_setup(). |
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# |
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# From a user perspective, the variable BUILDREQS_ACTION can be set to: |
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# * "warn" (default), which will display a warning and wait for 15s |
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# * "error", which will make the ebuild error out |
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# * "ignore", which will not take any action |
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# The chosen action only happens when the system's resources are detected |
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# correctly and only if they are below the threshold specified by the package. |
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# |
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# For ebuild authors: only use this eclass if you reaaalllllly have stupidly |
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# high build requirements. At an absolute minimum, you shouldn't be using this |
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# unless the ebuild needs >256MBytes RAM or >1GByte temporary or install space. |
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# The code should look something like: |
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# |
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# pkg_setup() { |
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# # values in MBytes |
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# |
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# # need this much memory (does *not* check swap) |
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# BUILDREQS_MEMORY="256" |
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# |
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# # need this much temporary build space |
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# BUILDREQS_DISK_BUILD="2048" |
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# |
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# # install will need this much space in /usr |
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# BUILDREQS_DISK_USR="1024" |
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# |
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# # install will need this much space in /var |
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# BUILDREQS_DISK_VAR="1024" |
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# |
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# # go! |
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# check_reqs |
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# } |
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# |
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# You should *not* override the user's BUILDREQS_ACTION setting, nor should you |
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# attempt to provide a value if it is unset. Note that the environment variables |
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# are used rather than parameters for a few reasons: |
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# * easier to do if use blah ; then things |
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# * we might add in additional requirements things later |
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# If you don't specify a value for, say, BUILDREQS_MEMORY, then the test is not |
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# carried out. |
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# |
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# These checks should probably mostly work on non-Linux, and they should |
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# probably degrade gracefully if they don't. Probably. |
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|
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inherit eutils |
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|
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ECLASS=check-reqs |
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INHERITED="$INHERITED $ECLASS" |
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|
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check_reqs() { |
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[ -n "$1" ] && die "Usage: check_reqs" |
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|
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export BUILDREQS_NEED_SLEEP="" BUILDREQS_NEED_DIE="" |
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if [ "$BUILDREQS_ACTION" != "ignore" ] ; then |
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[ -n "$BUILDREQS_MEMORY" ] && check_build_memory |
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[ -n "$BUILDREQS_DISK_BUILD" ] && check_build_disk \ |
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"${PORTAGE_TMPDIR}" "\${PORTAGE_TMPDIR}" "${BUILDREQS_DISK_BUILD}" |
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[ -n "$BUILDREQS_DISK_USR" ] && check_build_disk \ |
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"${ROOT}/usr" "\${ROOT}/usr" "${BUILDREQS_DISK_USR}" |
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[ -n "$BUILDREQS_DISK_VAR" ] && check_build_disk \ |
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"${ROOT}/var" "\${ROOT}/var" "${BUILDREQS_DISK_VAR}" |
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fi |
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|
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if [ -n "${BUILDREQS_NEED_SLEEP}" ] ; then |
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echo |
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ewarn "Bad things may happen! You may abort the build by pressing ctrl+c in" |
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ewarn "the next 15 seconds." |
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ewarn " " |
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einfo "To make this kind of warning a fatal error, add a line to /etc/make.conf" |
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einfo "setting BUILDREQS_ACTION=\"error\". To skip build requirements checking," |
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einfo "set BUILDREQS_ACTION=\"ignore\"." |
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epause 15 |
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fi |
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|
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if [ -n "${BUILDREQS_NEED_DIE}" ] ; then |
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eerror "Bailing out as specified by BUILDREQS_ACTION" |
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die "Build requirements not met" |
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fi |
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} |
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|
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# internal use only! |
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check_build_memory() { |
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[ -n "$1" ] && die "Usage: check_build_memory" |
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check_build_msg_begin "${BUILDREQS_MEMORY}" "MBytes" "RAM" |
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if [ -r /proc/meminfo ] ; then |
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actual_memory=$(sed -n -e '/MemTotal:/s/^[^:]*: *\([0-9]\+\) kB/\1/p' \ |
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/proc/meminfo) |
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else |
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actual_memory=$(sysctl hw.physmem 2>/dev/null ) |
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[ "$?" == "0" ] && |
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actual_memory=$(echo $actual_memory | sed -e 's/^[^:=]*[:=]//' ) |
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fi |
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if [ -n "${actual_memory}" ] ; then |
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if [ ${actual_memory} -lt $((1024 * ${BUILDREQS_MEMORY})) ] ; then |
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eend 1 |
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check_build_msg_ick "${BUILDREQS_MEMORY}" "MBytes" "RAM" |
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else |
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eend 0 |
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fi |
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else |
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eend 1 |
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ewarn "Couldn't determine amount of memory, skipping ..." |
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fi |
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} |
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|
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# internal use only! |
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check_build_disk() { |
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[ -z "$3" ] && die "Usage: check_build_disk where name needed" |
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check_build_msg_begin "${3}" "MBytes" \ |
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"disk space at ${2}" |
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actual_space=$(df -Pm ${1} 2>/dev/null | sed -n \ |
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'$s/\(\S\+\s\+\)\{3\}\([0-9]\+\).*/\2/p' 2>/dev/null ) |
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if [ "$?" == "0" ] && [ -n "${actual_space}" ] ; then |
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if [ ${actual_space} -lt ${3} ] ; then |
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eend 1 |
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check_build_msg_ick "${3}" "MBytes" \ |
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"disk space at ${2}" |
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else |
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eend 0 |
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fi |
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else |
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eend 1 |
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ewarn "Couldn't figure out disk space, skipping ..." |
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fi |
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} |
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|
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# internal use only! |
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check_build_msg_begin() { |
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ebegin "Checking for at least ${1}${2} ${3}" |
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} |
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|
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# internal use only! |
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check_build_msg_skip() { |
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ewarn "Skipping check for at least ${1}${2} ${3}" |
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} |
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|
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# internal use only! |
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check_build_msg_ick() { |
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if [ "${BUILDREQS_ACTION}" == "error" ] ; then |
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eerror "Don't have at least ${1}${2} ${3}" |
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echo |
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export BUILDREQS_NEED_DIE="yes" |
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else |
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ewarn "Don't have at least ${1}${2} ${3}" |
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echo |
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export BUILDREQS_NEED_SLEEP="yes" |
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fi |
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} |
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