1# $NetBSD: modmisc.mk,v 1.53 2023/06/16 07:20:45 rillig Exp $ 2# 3# miscellaneous modifier tests 4 5# do not put any dirs in this list which exist on some 6# but not all target systems - an exists() check is below. 7path= :/bin:/tmp::/:.:/no/such/dir:. 8# strip cwd from path. 9MOD_NODOT= S/:/ /g:N.:ts: 10# and decorate, note that $'s need to be doubled. Also note that 11# the modifier_variable can be used with other modifiers. 12MOD_NODOTX= S/:/ /g:N.:@d@'$$d'@ 13# another mod - pretend it is more interesting 14MOD_HOMES= S,/home/,/homes/, 15MOD_OPT= @d@$${exists($$d):?$$d:$${d:S,/usr,/opt,}}@ 16MOD_SEP= S,:, ,g 17 18all: modvar modvarloop emptyvar undefvar 19all: mod-quote 20all: mod-break-many-words 21 22# Demonstrates modifiers that are given indirectly from a variable. 23modvar: 24 @echo "path='${path}'" 25 @echo "path='${path:${MOD_NODOT}}'" 26 @echo "path='${path:S,home,homes,:${MOD_NODOT}}'" 27 @echo "path=${path:${MOD_NODOTX}:ts:}" 28 @echo "path=${path:${MOD_HOMES}:${MOD_NODOTX}:ts:}" 29 30.for d in ${path:${MOD_SEP}:N.} /usr/xbin 31path_$d?= ${d:${MOD_OPT}:${MOD_HOMES}}/ 32paths+= ${d:${MOD_OPT}:${MOD_HOMES}} 33.endfor 34 35modvarloop: 36 @echo "path_/usr/xbin=${path_/usr/xbin}" 37 @echo "paths=${paths}" 38 @echo "PATHS=${paths:tu}" 39 40# When a modifier is applied to the "" variable, the result is discarded. 41emptyvar: 42 @echo S:${:S,^$,empty,} 43 @echo C:${:C,^$,empty,} 44 @echo @:${:@var@${var}@} 45 46# The :U modifier turns even the "" variable into something that has a value. 47# The value of the resulting expression is empty, but is still considered to 48# contain a single empty word. This word can be accessed by the :S and :C 49# modifiers, but not by the :@ modifier since it explicitly skips empty words. 50undefvar: 51 @echo S:${:U:S,^$,empty,} 52 @echo C:${:U:C,^$,empty,} 53 @echo @:${:U:@var@empty@} 54 55 56mod-quote: 57 @echo $@: new${.newline:Q}${.newline:Q}line 58 59# Cover the bmake_realloc in Substring_Words. 60mod-break-many-words: 61 @echo $@: ${UNDEF:U:range=500:[#]} 62