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Diffstat (limited to 'contrib/bmake/mk/sys.clean-env.mk')
| -rw-r--r-- | contrib/bmake/mk/sys.clean-env.mk | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/contrib/bmake/mk/sys.clean-env.mk b/contrib/bmake/mk/sys.clean-env.mk new file mode 100644 index 0000000..b1867c3 --- /dev/null +++ b/contrib/bmake/mk/sys.clean-env.mk @@ -0,0 +1,119 @@ +# $Id: sys.clean-env.mk,v 1.20 2012/11/12 06:56:04 sjg Exp $ +# +# @(#) Copyright (c) 2009, Simon J. Gerraty +# +# This file is provided in the hope that it will +# be of use. There is absolutely NO WARRANTY. +# Permission to copy, redistribute or otherwise +# use this file is hereby granted provided that +# the above copyright notice and this notice are +# left intact. +# +# Please send copies of changes and bug-fixes to: +# sjg@crufty.net +# + +# This makefile would normally be included by sys.env.mk + +# The variables used by this makefile include: +# +# MAKE_ENV_SAVE_VAR_LIST +# The actuall list of variables from the environment that will be +# preserved. +# MAKE_ENV_SAVE_PREFIX_LIST +# A list of prefixes to match against the environment - the results +# are added to MAKE_ENV_SAVE_VAR_LIST after being filtered by... +# MAKE_ENV_SAVE_EXCLUDE_LIST +# A list of words or patterns which is turned into a list of :N +# modifiers. + +.if ${.MAKE.LEVEL} == 0 && ${MAKE_VERSION} >= 20100606 +# We save any env var that starts with the words in MAKE_ENV_SAVE_PREFIX_LIST. +# This gets expanded to an egrep expression like '^(A|B|C...)' +# and added to MAKE_ENV_SAVE_VAR_LIST below. +# If any of these end up being too greedy, MAKE_ENV_SAVE_EXCLUDE_LIST +# can be used to filter. +MAKE_ENV_SAVE_PREFIX_LIST += \ + CCACHE \ + CVS \ + DEBUG \ + DISTCC \ + HOST \ + MACHINE \ + MAKE \ + MK \ + NEED_ \ + SB_ \ + SSH \ + SVN \ + USE_ \ + WITH_ \ + WITHOUT_ \ + + +# This could be a list of vars or patterns to explicitly exclude. +MAKE_ENV_SAVE_EXCLUDE_LIST ?= _ + +# This is the actual list that we will save +# HOME is probably something worth clobbering eg. +# HOME=/var/empty +MAKE_ENV_SAVE_VAR_LIST += \ + HOME \ + LOGNAME \ + OBJROOT \ + OBJTOP \ + PATH \ + SB \ + SRCTOP \ + USER \ + ${_env_vars:${MAKE_ENV_SAVE_EXCLUDE_LIST:${M_ListToSkip}}} + +_env_vars != env | egrep '^(${MAKE_ENV_SAVE_PREFIX_LIST:ts|})' | sed 's,=.*,,'; echo + +_export_list = +.for v in ${MAKE_ENV_SAVE_VAR_LIST:O:u} +.if defined($v) +_export_list += $v +# Save current value +$v := ${$v} +.endif +.endfor + +# Now, clobber the environment +.unexport-env + +# This is a list of vars that we handle specially below +_tricky_env_vars = MAKEOBJDIR OBJTOP +# Export our selection - sans tricky ones +.export ${_export_list:${_tricky_env_vars:${M_ListToSkip}}} + +# This next bit may need tweaking +# if you don't happen to like the way I set it. +.if defined(MAKEOBJDIR) +# We are going to set this to the equivalent of the shell's +# MAKEOBJDIR='${.CURDIR:S,${SRCTOP},${OBJTOP},}' +_srctop := ${SRCTOP:U${SB_SRC:U${SB}/src}} +_objroot := ${OBJROOT:U${SB_OBJROOT:U${SB}/${SB_OBJPREFIX}}} +_objtop := ${OBJTOP:U${_objroot}${MACHINE}} +# Take care of ${MACHINE} +.if ${MACHINE} == "host" || ${OBJTOP} == ${HOST_OBJTOP:Uno} +OBJTOP = ${_objtop:S,${HOST_TARGET}$,\${MACHINE},} +.else +OBJTOP = ${_objtop:S,${MACHINE}$,\${MACHINE},} +.endif +# Export like this +MAKEOBJDIR = $${.CURDIR:S,${_srctop},$${OBJTOP},} +#.info ${MAKE_SAVE_ENV_VARS _srctop _objroot _objtop OBJTOP MAKEOBJDIR:L:@v@${.newline}$v=${$v}@} + +# Export these as-is, and do not track... +# otherwise the environment will be ruined when we evaluate them below. +.export-env ${_tricky_env_vars} + +# Now evaluate for ourselves +.for v in ${_tricky_env_vars} +$v := ${$v} +.endfor +#.info ${_tricky_env_vars:@v@${.newline}$v=${$v}@} + +.endif # MAKEOBJDIR +.endif # level 0 |
