/[gentoo-x86]/eclass/check-reqs.eclass
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1# Copyright 1999-2011 Gentoo Foundation 1# Copyright 1999-2012 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/check-reqs.eclass,v 1.8 2011/08/22 04:46:31 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/check-reqs.eclass,v 1.12 2012/10/19 02:44:21 patrick Exp $
4 4
5# @ECLASS: check-reqs.eclass 5# @ECLASS: check-reqs.eclass
6# @MAINTAINER: 6# @MAINTAINER:
7# QA Team <qa@gentoo.org>
8# @AUTHOR:
7# Bo ├śrsted Andresen <zlin@gentoo.org> 9# Bo ├śrsted Andresen <zlin@gentoo.org>
8# @AUTHOR:
9# Original Author: Ciaran McCreesh <ciaranm@gentoo.org> 10# Original Author: Ciaran McCreesh <ciaranm@gentoo.org>
10# @BLURB: Provides a uniform way of handling ebuild which have very high build requirements 11# @BLURB: Provides a uniform way of handling ebuild which have very high build requirements
11# @DESCRIPTION: 12# @DESCRIPTION:
12# This eclass provides a uniform way of handling ebuilds which have very high 13# This eclass provides a uniform way of handling ebuilds which have very high
13# build requirements in terms of memory or disk space. It provides a function 14# build requirements in terms of memory or disk space. It provides a function
14# which should usually be called during pkg_setup(). 15# which should usually be called during pkg_setup().
15# 16#
16# From a user perspective, the variable CHECKREQS_ACTION can be set to:
17# * "warn" (default), which will display a warning and wait for 15s
18# * "error", which will make the ebuild error out
19# * "ignore", which will not take any action
20#
21# The chosen action only happens when the system's resources are detected 17# The chosen action only happens when the system's resources are detected
22# correctly and only if they are below the threshold specified by the package. 18# correctly and only if they are below the threshold specified by the package.
23# 19#
24# For ebuild authors: only use this eclass if you reaaalllllly have stupidly
25# high build requirements. At an absolute minimum, you shouldn't be using this
26# unless the ebuild needs >256MBytes RAM or >1GByte temporary or install space.
27# The code should look something like:
28#
29# @CODE 20# @CODE
30# pkg_setup() {
31# # values in MBytes
32#
33# # need this much memory (does *not* check swap) 21# # need this much memory (does *not* check swap)
34# CHECKREQS_MEMORY="256" 22# CHECKREQS_MEMORY="256M"
35# 23#
36# # need this much temporary build space 24# # need this much temporary build space
37# CHECKREQS_DISK_BUILD="2048" 25# CHECKREQS_DISK_BUILD="2G"
38# 26#
39# # install will need this much space in /usr 27# # install will need this much space in /usr
40# CHECKREQS_DISK_USR="1024" 28# CHECKREQS_DISK_USR="1G"
41# 29#
42# # install will need this much space in /var 30# # install will need this much space in /var
43# CHECKREQS_DISK_VAR="1024" 31# CHECKREQS_DISK_VAR="1024M"
44# 32#
45# # go!
46# check_reqs
47# }
48# @CODE 33# @CODE
49# 34#
50# Alternatively, the check_reqs_conditional function can be used to carry out
51# alternate actions (e.g. using a much slower but far less memory intensive
52# build option that gives the same end result).
53#
54# You should *not* override the user's CHECKREQS_ACTION setting, nor should you
55# attempt to provide a value if it is unset. Note that the environment variables
56# are used rather than parameters for a few reasons:
57# * easier to do if use blah ; then things
58# * we might add in additional requirements things later
59# If you don't specify a value for, say, CHECKREQS_MEMORY, then the test is not 35# If you don't specify a value for, say, CHECKREQS_MEMORY, then the test is not
60# carried out. 36# carried out.
61# 37#
62# These checks should probably mostly work on non-Linux, and they should 38# These checks should probably mostly work on non-Linux, and they should
63# probably degrade gracefully if they don't. Probably. 39# probably degrade gracefully if they don't. Probably.
64 40
65inherit eutils 41inherit eutils
66 42
67# @ECLASS-VARIABLE: CHECKREQS_MEMORY 43# @ECLASS-VARIABLE: CHECKREQS_MEMORY
44# @DEFAULT_UNSET
68# @DESCRIPTION: 45# @DESCRIPTION:
69# How much RAM is needed in MB? 46# How much RAM is needed? Eg.: CHECKREQS_MEMORY=15M
70 47
71# @ECLASS-VARIABLE: CHECKREQS_DISK_BUILD 48# @ECLASS-VARIABLE: CHECKREQS_DISK_BUILD
49# @DEFAULT_UNSET
72# @DESCRIPTION: 50# @DESCRIPTION:
73# How much diskspace is needed to build the package? In MB 51# How much diskspace is needed to build the package? Eg.: CHECKREQS_DISK_BUILD=2T
74 52
75# @ECLASS-VARIABLE: CHECKREQS_DISK_USR 53# @ECLASS-VARIABLE: CHECKREQS_DISK_USR
54# @DEFAULT_UNSET
76# @DESCRIPTION: 55# @DESCRIPTION:
77# How much space in /usr is needed to install the package? In MB 56# How much space in /usr is needed to install the package? Eg.: CHECKREQS_DISK_USR=15G
78 57
79# @ECLASS-VARIABLE: CHECKREQS_DISK_VAR 58# @ECLASS-VARIABLE: CHECKREQS_DISK_VAR
59# @DEFAULT_UNSET
80# @DESCRIPTION: 60# @DESCRIPTION:
81# How much space is needed in /var? In MB 61# How much space is needed in /var? Eg.: CHECKREQS_DISK_VAR=3000M
62
63EXPORT_FUNCTIONS pkg_setup
64case "${EAPI:-0}" in
65 0|1|2|3) ;;
66 4|5) EXPORT_FUNCTIONS pkg_pretend ;;
67 *) die "EAPI=${EAPI} is not supported" ;;
68esac
82 69
83# @FUNCTION: check_reqs 70# @FUNCTION: check_reqs
84# @DESCRIPTION: 71# @DESCRIPTION:
85# Checks the requirements given in the specific variables. If not reached, 72# Obsolete function executing all the checks and priting out results
86# either prints a warning or dies.
87check_reqs() { 73check_reqs() {
88 [[ -n "${1}" ]] && die "Usage: check_reqs" 74 debug-print-function ${FUNCNAME} "$@"
89 75
90 export CHECKREQS_NEED_SLEEP="" CHECKREQS_NEED_DIE=""
91 if [[ "$CHECKREQS_ACTION" != "ignore" ]] ; then
92 [[ -n "$CHECKREQS_MEMORY" ]] && check_build_memory
93 [[ -n "$CHECKREQS_DISK_BUILD" ]] && check_build_disk \
94 "${T}" "${CHECKREQS_DISK_BUILD}"
95 [[ -n "$CHECKREQS_DISK_USR" ]] && check_build_disk \
96 "${ROOT}/usr" "${CHECKREQS_DISK_USR}"
97 [[ -n "$CHECKREQS_DISK_VAR" ]] && check_build_disk \
98 "${ROOT}/var" "${CHECKREQS_DISK_VAR}"
99 fi
100
101 if [[ -n "${CHECKREQS_NEED_SLEEP}" ]] ; then
102 echo 76 echo
103 ewarn "Bad things may happen! You may abort the build by pressing ctrl+c in" 77 ewarn "QA: Package calling old ${FUNCNAME} function."
104 ewarn "the next 15 seconds." 78 ewarn "QA: Please file a bug against the package."
105 ewarn " " 79 ewarn "QA: It should call check-reqs_pkg_pretend and check-reqs_pkg_setup"
106 einfo "To make this kind of warning a fatal error, add a line to /etc/make.conf" 80 ewarn "QA: and possibly use EAPI=4 or later."
107 einfo "setting CHECKREQS_ACTION=\"error\". To skip build requirements checking," 81 echo
108 einfo "set CHECKREQS_ACTION=\"ignore\"."
109 epause 15
110 fi
111 82
83 check-reqs_pkg_setup "$@"
84}
85
86# @FUNCTION: check-reqs_pkg_setup
87# @DESCRIPTION:
88# Exported function running the resources checks in pkg_setup phase.
89# It should be run in both phases to ensure condition changes between
90# pkg_pretend and pkg_setup won't affect the build.
91check-reqs_pkg_setup() {
92 debug-print-function ${FUNCNAME} "$@"
93
94 [[ ${MERGE_TYPE} == binary ]] && return
95
96 check-reqs_prepare
97 check-reqs_run
98 check-reqs_output
99}
100
101# @FUNCTION: check-reqs_pkg_pretend
102# @DESCRIPTION:
103# Exported function running the resources checks in pkg_pretend phase.
104check-reqs_pkg_pretend() {
105 debug-print-function ${FUNCNAME} "$@"
106
107 check-reqs_pkg_setup "$@"
108}
109
110# @FUNCTION: check-reqs_prepare
111# @DESCRIPTION:
112# Internal function that checks the variables that should be defined.
113check-reqs_prepare() {
114 debug-print-function ${FUNCNAME} "$@"
115
116 if [[ -z ${CHECKREQS_MEMORY} &&
117 -z ${CHECKREQS_DISK_BUILD} &&
118 -z ${CHECKREQS_DISK_USR} &&
119 -z ${CHECKREQS_DISK_VAR} ]]; then
120 eerror "Set some check-reqs eclass variables if you want to use it."
121 eerror "If you are user and see this message file a bug against the package."
122 die "${FUNCNAME}: check-reqs eclass called but not actualy used!"
123 fi
124}
125
126# @FUNCTION: check-reqs_run
127# @DESCRIPTION:
128# Internal function that runs the check based on variable settings.
129check-reqs_run() {
130 debug-print-function ${FUNCNAME} "$@"
131
132 # some people are *censored*
133 unset CHECKREQS_FAILED
134
135 [[ -n ${CHECKREQS_MEMORY} ]] && \
136 check-reqs_memory \
137 ${CHECKREQS_MEMORY}
138
139 [[ -n ${CHECKREQS_DISK_BUILD} ]] && \
140 check-reqs_disk \
141 "${T}" \
142 "${CHECKREQS_DISK_BUILD}"
143
144 [[ -n ${CHECKREQS_DISK_USR} ]] && \
145 check-reqs_disk \
146 "${EROOT}/usr" \
147 "${CHECKREQS_DISK_USR}"
148
149 [[ -n ${CHECKREQS_DISK_VAR} ]] && \
150 check-reqs_disk \
151 "${EROOT}/var" \
152 "${CHECKREQS_DISK_VAR}"
153}
154
155# @FUNCTION: check-reqs_get_mebibytes
156# @DESCRIPTION:
157# Internal function that returns number in mebibytes.
158# Converts from 1G=1024 or 1T=1048576
159check-reqs_get_mebibytes() {
160 debug-print-function ${FUNCNAME} "$@"
161
162 [[ -z ${1} ]] && die "Usage: ${FUNCNAME} [size]"
163
164 local unit=${1:(-1)}
165 local size=${1%[GMT]}
166
167 case ${unit} in
168 G) echo $((1024 * size)) ;;
169 [M0-9]) echo ${size} ;;
170 T) echo $((1024 * 1024 * size)) ;;
171 *)
172 die "${FUNCNAME}: Unknown unit: ${unit}"
173 ;;
174 esac
175}
176
177# @FUNCTION: check-reqs_get_number
178# @DESCRIPTION:
179# Internal function that returns number without the unit.
180# Converts from 1G=1 or 150T=150.
181check-reqs_get_number() {
182 debug-print-function ${FUNCNAME} "$@"
183
184 [[ -z ${1} ]] && die "Usage: ${FUNCNAME} [size]"
185
186 local unit=${1:(-1)}
187 local size=${1%[GMT]}
188
189 # Check for unset units and warn about them.
190 # Backcompat.
191 if [[ ${size} == ${1} ]]; then
192 ewarn "QA: Package does not specify unit for the size check"
193 ewarn "QA: Assuming mebibytes."
194 ewarn "QA: File bug against the package. It should specify the unit."
195 fi
196
197 echo ${size}
198}
199
200# @FUNCTION: check-reqs_get_unit
201# @DESCRIPTION:
202# Internal function that returns number without the unit.
203# Converts from 1G=1 or 150T=150.
204check-reqs_get_unit() {
205 debug-print-function ${FUNCNAME} "$@"
206
207 [[ -z ${1} ]] && die "Usage: ${FUNCNAME} [size]"
208
209 local unit=${1:(-1)}
210
211 case ${unit} in
212 G) echo "gibibytes" ;;
213 [M0-9]) echo "mebibytes" ;;
214 T) echo "tebibytes" ;;
215 *)
216 die "${FUNCNAME}: Unknown unit: ${unit}"
217 ;;
218 esac
219}
220
221# @FUNCTION: check-reqs_output
222# @DESCRIPTION:
223# Internal function that prints the warning and dies if required based on
224# the test results.
225check-reqs_output() {
226 debug-print-function ${FUNCNAME} "$@"
227
228 local msg="ewarn"
229
230 [[ ${EBUILD_PHASE} == "pretend" && -z ${I_KNOW_WHAT_I_AM_DOING} ]] && msg="eerror"
112 if [[ -n "${CHECKREQS_NEED_DIE}" ]] ; then 231 if [[ -n ${CHECKREQS_FAILED} ]]; then
113 eerror "Bailing out as specified by CHECKREQS_ACTION" 232 ${msg}
233 ${msg} "Space constrains set in the ebuild were not met!"
234 ${msg} "The build will most probably fail, you should enhance the space"
235 ${msg} "as per failed tests."
236 ${msg}
237
238 [[ ${EBUILD_PHASE} == "pretend" && -z ${I_KNOW_WHAT_I_AM_DOING} ]] && \
114 die "Build requirements not met" 239 die "Build requirements not met!"
115 fi 240 fi
116} 241}
117 242
118# @FUNCTION: check_reqs_conditional 243# @FUNCTION: check-reqs_memory
119# @RETURN: True if requirements check passed, else False
120# @DESCRIPTION: 244# @DESCRIPTION:
121# Checks the requirements given in the specific variables 245# Internal function that checks size of RAM.
122check_reqs_conditional() { 246check-reqs_memory() {
123 [[ -n "${1}" ]] && die "Usage: check_reqs" 247 debug-print-function ${FUNCNAME} "$@"
124 248
125 export CHECKREQS_NEED_SLEEP="" CHECKREQS_NEED_DIE="" 249 [[ -z ${1} ]] && die "Usage: ${FUNCNAME} [size]"
126 if [[ "$CHECKREQS_ACTION" != "ignore" ]] ; then
127 [[ -n "$CHECKREQS_MEMORY" ]] && check_build_memory
128 [[ -n "$CHECKREQS_DISK_BUILD" ]] && check_build_disk \
129 "${T}" "${CHECKREQS_DISK_BUILD}"
130 [[ -n "$CHECKREQS_DISK_USR" ]] && check_build_disk \
131 "${ROOT}/usr" "${CHECKREQS_DISK_USR}"
132 [[ -n "$CHECKREQS_DISK_VAR" ]] && check_build_disk \
133 "${ROOT}/var" "${CHECKREQS_DISK_VAR}"
134 fi
135 250
136 [[ -z "${CHECKREQS_NEED_SLEEP}" && -z "${CHECKREQS_NEED_DIE}" ]] 251 local size=${1}
137} 252 local actual_memory
138 253
139# internal use only! 254 check-reqs_start_phase \
140check_build_memory() { 255 ${size} \
141 [[ -n "${1}" ]] && die "Usage: check_build_memory" 256 "RAM"
142 check_build_msg_begin "${CHECKREQS_MEMORY}" "MBytes" "RAM" 257
143 if [[ -r /proc/meminfo ]] ; then 258 if [[ -r /proc/meminfo ]] ; then
144 actual_memory=$(sed -n -e '/MemTotal:/s/^[^:]*: *\([0-9]\+\) kB/\1/p' \ 259 actual_memory=$(awk '/MemTotal/ { print $2 }' /proc/meminfo)
145 /proc/meminfo)
146 else 260 else
147 actual_memory=$(sysctl hw.physmem 2>/dev/null ) 261 actual_memory=$(sysctl hw.physmem 2>/dev/null )
148 [[ "$?" == "0" ]] && 262 [[ "$?" == "0" ]] &&
149 actual_memory=$(echo $actual_memory | sed -e 's/^[^:=]*[:=]//' ) 263 actual_memory=$(echo $actual_memory | sed -e 's/^[^:=]*[:=]//' )
150 fi 264 fi
151 if [[ -n "${actual_memory}" ]] ; then 265 if [[ -n ${actual_memory} ]] ; then
152 if [[ ${actual_memory} -lt $((1024 * ${CHECKREQS_MEMORY})) ]] ; then 266 if [[ ${actual_memory} -lt $((1024 * $(check-reqs_get_mebibytes ${size}))) ]] ; then
153 eend 1 267 eend 1
154 check_build_msg_ick "${CHECKREQS_MEMORY}" "MBytes" "RAM" 268 check-reqs_unsatisfied \
269 ${size} \
270 "RAM"
155 else 271 else
156 eend 0 272 eend 0
157 fi 273 fi
158 else 274 else
159 eend 1 275 eend 1
160 ewarn "Couldn't determine amount of memory, skipping ..." 276 ewarn "Couldn't determine amount of memory, skipping..."
161 fi 277 fi
162} 278}
163 279
164# internal use only! 280# @FUNCTION: check-reqs_disk
165check_build_disk() { 281# @DESCRIPTION:
166 [[ -z "${2}" ]] && die "Usage: check_build_disk where name needed" 282# Internal function that checks space on the harddrive.
167 check_build_msg_begin "${2}" "MBytes" \ 283check-reqs_disk() {
284 debug-print-function ${FUNCNAME} "$@"
285
286 [[ -z ${2} ]] && die "Usage: ${FUNCNAME} [path] [size]"
287
288 local path=${1}
289 local size=${2}
290 local space_megs
291
292 check-reqs_start_phase \
293 ${size} \
168 "disk space at ${1}" 294 "disk space at \"${path}\""
169 actual_space=$(df -Pm ${1} 2>/dev/null | sed -n \ 295
170 '$s/\(\S\+\s\+\)\{3\}\([0-9]\+\).*/\2/p' 2>/dev/null ) 296 space_megs=$(df -Pm "${1}" 2>/dev/null | awk 'FNR == 2 {print $4}')
297
171 if [[ "$?" == "0" && -n "${actual_space}" ]] ; then 298 if [[ $? == 0 && -n ${space_megs} ]] ; then
172 if [[ ${actual_space} -lt ${2} ]] ; then 299 if [[ ${space_megs} -lt $(check-reqs_get_mebibytes ${size}) ]] ; then
173 eend 1 300 eend 1
174 check_build_msg_ick "${2}" "MBytes" \ 301 check-reqs_unsatisfied \
302 ${size} \
175 "disk space at ${1}" 303 "disk space at \"${path}\""
176 else 304 else
177 eend 0 305 eend 0
178 fi 306 fi
179 else 307 else
180 eend 1 308 eend 1
181 ewarn "Couldn't figure out disk space, skipping ..." 309 ewarn "Couldn't determine disk space, skipping..."
182 fi 310 fi
183} 311}
184 312
185# internal use only! 313# @FUNCTION: check-reqs_start_phase
186check_build_msg_begin() { 314# @DESCRIPTION:
315# Internal function that inform about started check
316check-reqs_start_phase() {
317 debug-print-function ${FUNCNAME} "$@"
318
319 [[ -z ${2} ]] && die "Usage: ${FUNCNAME} [size] [location]"
320
321 local size=${1}
322 local location=${2}
323 local sizeunit="$(check-reqs_get_number ${size}) $(check-reqs_get_unit ${size})"
324
187 ebegin "Checking for at least ${1}${2} ${3}" 325 ebegin "Checking for at least ${sizeunit} ${location}"
188} 326}
189 327
190# internal use only! 328# @FUNCTION: check-reqs_unsatisfied
191check_build_msg_skip() { 329# @DESCRIPTION:
192 ewarn "Skipping check for at least ${1}${2} ${3}" 330# Internal function that inform about check result.
193} 331# It has different output between pretend and setup phase,
332# where in pretend phase it is fatal.
333check-reqs_unsatisfied() {
334 debug-print-function ${FUNCNAME} "$@"
194 335
195# internal use only! 336 [[ -z ${2} ]] && die "Usage: ${FUNCNAME} [size] [location]"
196check_build_msg_ick() {
197 if [[ "${CHECKREQS_ACTION}" == "error" ]] ; then
198 eerror "Don't have at least ${1}${2} ${3}"
199 echo
200 export CHECKREQS_NEED_DIE="yes"
201 else
202 ewarn "Don't have at least ${1}${2} ${3}"
203 echo
204 export CHECKREQS_NEED_SLEEP="yes"
205 fi
206}
207 337
338 local msg="ewarn"
339 local size=${1}
340 local location=${2}
341 local sizeunit="$(check-reqs_get_number ${size}) $(check-reqs_get_unit ${size})"
342
343 [[ ${EBUILD_PHASE} == "pretend" && -z ${I_KNOW_WHAT_I_AM_DOING} ]] && msg="eerror"
344 ${msg} "There is NOT at least ${sizeunit} ${location}"
345
346 # @ECLASS-VARIABLE: CHECKREQS_FAILED
347 # @DESCRIPTION:
348 # @INTERNAL
349 # If set the checks failed and eclass should abort the build.
350 # Internal, do not set yourself.
351 CHECKREQS_FAILED="true"
352}
353

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