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# $NetBSD: help.mk,v 1.1 2006/10/23 14:40:15 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.
.if !defined(_PKGSRC_HELP_MK)
_PKGSRC_HELP_MK= # defined
_HELP_FILES= mk/*.mk mk/*/*.mk
.if defined(VARNAME)
TOPIC?= ${VARNAME}
.endif
.if defined(topic)
TOPIC?= ${topic}
.endif
.PHONY: help
help:
.if !defined(TOPIC)
@${PRINTF} "usage: %s help topic=<topic>\\n" ${MAKE:Q}
@${PRINTF} "\\n"
@${PRINTF} "\\t<topic> may be a variable name or a make target,\\n"
@${PRINTF} "\\tfor example CONFIGURE_DIRS or patch. For convenience,\\n"
@${PRINTF} "\\tyou don't need to use uppercase letters when typing\\n"
@${PRINTF} "\\tvariable names.\\n"
@${PRINTF} "\\n"
.else
${_PKG_SILENT}${_PKG_DEBUG} set -e; \
cd ${PKGSRCDIR}; \
{ for i in ${_HELP_FILES}; do ${CAT} "$$i"; ${ECHO} ""; done; } \
| env TOPIC=${TOPIC:Q} ${AWK} -f ${PKGSRCDIR}/mk/help/help.awk
.endif
.endif
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