summaryrefslogtreecommitdiff
path: root/mk/subst.mk
blob: ff162528eecc06c11f50105956fca818238d5bf4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
# $NetBSD: subst.mk,v 1.17 2005/04/30 15:05:06 jlam 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>}.
#
# SUBST_POSTCMD.<class>
#	command to clean up after sed(1). Defaults to ${RM} -f
#	$$file${_SUBST_BACKUP_SUFFIX}. For debugging, set it to ${DO_NADA}.

ECHO_SUBST_MSG?=	${ECHO}

# _SUBST_IS_TEXT_FILE returns 0 if $${file} is a text file.
_SUBST_IS_TEXT_FILE?= \
	${FILE_CMD} $${file} | ${EGREP} "(executable .* script|shell script|text)" >/dev/null 2>&1

_SUBST_BACKUP_SUFFIX=	.subst.sav

.for _class_ in ${SUBST_CLASSES}
_SUBST_COOKIE.${_class_}=	${WRKDIR}/.subst_${_class_}_done

SUBST_FILTER_CMD.${_class_}?=	${SED} ${SUBST_SED.${_class_}}
SUBST_POSTCMD.${_class_}?=	${RM} -f $$file${_SUBST_BACKUP_SUFFIX}

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_}}:
	${_PKG_SILENT}${_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_BACKUP_SUFFIX} || exit 1; \
				${CAT} $$file${_SUBST_BACKUP_SUFFIX}	\
					| ${SUBST_FILTER_CMD.${_class_}} \
					> $$file;			\
				if [ -x $$file${_SUBST_BACKUP_SUFFIX} ]; then \
					${CHMOD} +x $$file;		\
				fi;					\
				if ${CMP} -s $$file${_SUBST_BACKUP_SUFFIX} $$file; then \
					${MV} -f $$file${_SUBST_BACKUP_SUFFIX} $$file; \
				else					\
					${SUBST_POSTCMD.${_class_}};	\
					${ECHO} $$file >> ${.TARGET};	\
				fi;					\
			fi;						\
		done ;;							\
	esac
.endfor