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# $NetBSD: subst.mk,v 1.10 2004/03/01 09:57:10 uebayasi Exp $
#
# This Makefile fragment implements a general text replacement facility.
# Package makefiles define a ``class'', for each of which a paricular
# substitution description can be defined. For each class of files, a
# target subst-<class> is created to perform the text replacement.
#
# The following variables are used:
#
# SUBST_CLASSES
# A list of class names. A new class name must be appended (+=).
#
# SUBST_STAGE.<class>
# "stage" at which we do the text replacement, e.g. pre-configure,
# post-build, etc.
#
# SUBST_MESSAGE.<class>
# message to display, noting what is being substituted
#
# SUBST_FILES.<class>
# files on which to run the substitution; these are relative to
# ${WRKSRC}
#
# SUBST_SED.<class>
# sed(1) substitution expression to run on the specified files
#
# SUBST_FILTER_CMD.<class>
# filter used to perform the actual substitution on the specified
# files. Defaults to ${SED} ${SUBST_SED.<class>}.
ECHO_SUBST_MSG?= ${ECHO}
# _SUBST_IS_TEXT_FILE returns 0 if $${file} is a text file.
_SUBST_IS_TEXT_FILE?= \
${FILE_CMD} $${file} | ${EGREP} "(shell script|text)" >/dev/null 2>&1
.for _class_ in ${SUBST_CLASSES}
_SUBST_COOKIE.${_class_}= ${WRKDIR}/.subst_${_class_}_done
. if defined(SUBST_SED.${_class_}) && !empty(SUBST_SED.${_class_})
SUBST_FILTER_CMD.${_class_}?= ${SED} ${SUBST_SED.${_class_}}
. else
SUBST_FILTER_CMD.${_class_}?= # empty
. endif
SUBST_TARGETS+= subst-${_class_}
_SUBST_TARGETS.${_class_}= subst-${_class_}-message
_SUBST_TARGETS.${_class_}+= ${_SUBST_COOKIE.${_class_}}
_SUBST_TARGETS.${_class_}+= subst-${_class_}-cookie
.ORDER: ${_SUBST_TARGETS.${_class_}}
. if defined(SUBST_STAGE.${_class_})
${SUBST_STAGE.${_class_}}: subst-${_class_}
. endif
.PHONY: subst-${_class_}
subst-${_class_}: ${_SUBST_TARGETS.${_class_}}
.PHONY: subst-${_class_}-message
subst-${_class_}-message:
. if defined(SUBST_MESSAGE.${_class_})
${_PKG_SILENT}${_PKG_DEBUG} \
${ECHO_SUBST_MSG} "=> ${SUBST_MESSAGE.${_class_}}"
. endif
.PHONY: subst-${_class_}-cookie
subst-${_class_}-cookie:
${_PKG_SILENT}${_PKG_DEBUG} \
${TOUCH} ${TOUCH_FLAGS} ${_SUBST_COOKIE.${_class_}}
${_SUBST_COOKIE.${_class_}}:
. if !empty(SUBST_FILTER_CMD.${_class_})
${_PKG_SILENT}${_PKG_DEBUG} \
cd ${WRKSRC}; \
files="${SUBST_FILES.${_class_}}"; \
case "$$files" in \
"") ;; \
*) for file in $${files}; do \
if ${_SUBST_IS_TEXT_FILE}; then \
${MV} -f $$file $$file.subst.sav || exit 1; \
${CAT} $$file.subst.sav \
| ${SUBST_FILTER_CMD.${_class_}} \
> $$file; \
if [ -x $$file.subst.sav ]; then \
${CHMOD} +x $$file; \
fi; \
if ${CMP} -s $$file.subst.sav $$file; then \
${MV} -f $$file.subst.sav $$file; \
else \
${ECHO} $$file >> ${.TARGET}; \
fi; \
fi; \
done ;; \
esac
. endif
.endfor
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