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# $NetBSD: help.mk,v 1.13 2017/10/31 16:24:42 rillig Exp $
#
# This is the integrated pkgsrc online help system. To query for the
# meaning of a variable, run "make help TOPIC=VARNAME". All variables from
# certain pkgsrc Makefile fragments that have inline comments are eligible
# for querying.
_HELP_FILES= Makefile
_HELP_FILES+= mk/*.mk mk/*/*.mk mk/*/*/*.mk
_HELP_FILES+= mk/defaults/mk.conf
_HELP_FILES+= lang/go/*.mk
_HELP_FILES+= lang/perl5/*.mk lang/php/*.mk lang/python/*.mk
_HELP_FILES+= lang/ruby/*.mk
_HELP_FILES+= print/texlive/*.mk
_HELP_FILES+= mk/*/*.help
.if exists(${.PARSEDIR}/../../wip/mk)
_HELP_FILES+= wip/mk/*.mk
.endif
.if defined(VARNAME)
TOPIC?= ${VARNAME}
.endif
.if defined(topic)
TOPIC?= ${topic}
.endif
.PHONY: help
help:
.if !defined(TOPIC)
@${ECHO} "usage: "${MAKE:Q}" help topic=<topic>"
@${ECHO} ""
@${ECHO} " <topic> may be a variable name or a make target,"
@${ECHO} " for example CONFIGURE_DIRS or patch."
@${ECHO} ""
@${ECHO} " For convenience, all-uppercase topics such as variable"
@${ECHO} " names may also be given in all-lowercase."
@${ECHO} ""
@${ECHO} " The special topic :index lists all available topics."
@${ECHO} ""
.else
${RUN} cd ${PKGSRCDIR}; \
env TOPIC=${TOPIC:Q} ${AWK} -f ${PKGSRCDIR}/mk/help/help.awk ${_HELP_FILES}
.endif
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