mirror of
https://github.com/opnsense/src.git
synced 2026-03-03 13:51:30 -05:00
2c3632d14f
Lots of code refactoring, simplification and cleanup. Lots of new unit-tests providing much higher code coverage. All courtesy of rillig at netbsd. Other significant changes: o new read-only variable .SHELL which provides the path of the shell used to run scripts (as defined by the .SHELL target). o variable parsing detects more errors. o new debug option -dl: LINT mode, does the equivalent of := for all variable assignments so that file and line number are reported for variable parse errors.
97 lines
2.6 KiB
Makefile
Executable file
97 lines
2.6 KiB
Makefile
Executable file
# $NetBSD: directive-for.mk,v 1.2 2020/09/02 22:58:59 rillig Exp $
|
|
#
|
|
# Tests for the .for directive.
|
|
|
|
# Using the .for loop, lists of values can be produced.
|
|
# In simple cases, the :@var@${var}@ variable modifier can be used to
|
|
# reach the same effects.
|
|
#
|
|
.undef NUMBERS
|
|
.for num in 1 2 3
|
|
NUMBERS+= ${num}
|
|
.endfor
|
|
.if ${NUMBERS} != "1 2 3"
|
|
. error
|
|
.endif
|
|
|
|
# The .for loop also works for multiple iteration variables.
|
|
.for name value in VARNAME value NAME2 value2
|
|
${name}= ${value}
|
|
.endfor
|
|
.if ${VARNAME} != "value" || ${NAME2} != "value2"
|
|
. error
|
|
.endif
|
|
|
|
# The .for loop splits the items at whitespace, taking quotes into account,
|
|
# just like the :M or :S variable modifiers.
|
|
#
|
|
# Until 2012-06-03, it had split the items exactly at whitespace, without
|
|
# taking the quotes into account.
|
|
#
|
|
.undef WORDS
|
|
.for var in one t\ w\ o "three three" 'four four' `five six`
|
|
WORDS+= counted
|
|
.endfor
|
|
.if ${WORDS:[#]} != 6
|
|
. error
|
|
.endif
|
|
|
|
# In the body of the .for loop, the iteration variables can be accessed
|
|
# like normal variables, even though they are not really variables.
|
|
#
|
|
# Instead, the expression ${var} is transformed into ${:U1}, ${:U2} and so
|
|
# on, before the loop body is evaluated.
|
|
#
|
|
# A notable effect of this implementation technique is that the .for
|
|
# iteration variables and the normal global variables live in separate
|
|
# namespaces and do not influence each other.
|
|
#
|
|
var= value before
|
|
var2= value before
|
|
.for var var2 in 1 2 3 4
|
|
.endfor
|
|
.if ${var} != "value before"
|
|
. warning After the .for loop, var must still have its original value.
|
|
.endif
|
|
.if ${var2} != "value before"
|
|
. warning After the .for loop, var2 must still have its original value.
|
|
.endif
|
|
|
|
# Everything from the paragraph above also applies if the loop body is
|
|
# empty, even if there is no actual iteration since the loop items are
|
|
# also empty.
|
|
#
|
|
var= value before
|
|
var2= value before
|
|
.for var var2 in ${:U}
|
|
.endfor
|
|
.if ${var} != "value before"
|
|
. warning After the .for loop, var must still have its original value.
|
|
.endif
|
|
.if ${var2} != "value before"
|
|
. warning After the .for loop, var2 must still have its original value.
|
|
.endif
|
|
|
|
# Until 2008-12-21, the values of the iteration variables were simply
|
|
# inserted as plain text and then parsed as usual, which made it possible
|
|
# to achieve all kinds of strange effects.
|
|
#
|
|
# Before that date, the .for loop expanded to:
|
|
# EXPANSION+= value
|
|
# Since that date, the .for loop expands to:
|
|
# EXPANSION${:U+}= value
|
|
#
|
|
EXPANSION= before
|
|
EXPANSION+ = before
|
|
.for plus in +
|
|
EXPANSION${plus}= value
|
|
.endfor
|
|
.if ${EXPANSION} != "before"
|
|
. error This must be a make from before 2009.
|
|
.endif
|
|
.if ${EXPANSION+} != "value"
|
|
. error This must be a make from before 2009.
|
|
.endif
|
|
|
|
all:
|
|
@:;
|