xref: /freebsd/contrib/bmake/unit-tests/varmod-shell.mk (revision 56b17de1e8360fe131d425de20b5e75ff3ea897c)
1# $NetBSD: varmod-shell.mk,v 1.10 2024/07/05 19:47:22 rillig Exp $
2#
3# Tests for the ':!cmd!' variable modifier, which runs the shell command
4# given by the variable modifier and returns its output.
5#
6# This modifier has been added on 2000-04-29.
7#
8# See also:
9#	ApplyModifier_ShellCommand
10
11# The command to be run is enclosed between exclamation marks.
12# The previous value of the expression is irrelevant for this modifier.
13# The :!cmd! modifier turns an undefined expression into a defined one.
14.if ${:!echo word!} != "word"
15.  error
16.endif
17
18# If the command exits with non-zero, an error message is printed.
19# XXX: Processing continues as usual though.
20#
21# Between 2000-04-29 and 2020-11-17, the error message mentioned the previous
22# value of the expression (which is usually an empty string) instead of the
23# command that was executed.
24# expect+1: warning: while evaluating "${:!echo word; (exit 13)!} != "word"" with value "word": Command "echo word; (exit 13)" exited with status 13
25.if ${:!echo word; (exit 13)!} != "word"
26.  error
27.endif
28# expect+1: warning: while evaluating "${:Uprevious value:!echo word; (exit 13)!} != "word"" with value "word": Command "echo word; (exit 13)" exited with status 13
29.if ${:Uprevious value:!echo word; (exit 13)!} != "word"
30.  error
31.endif
32
33
34.MAKEFLAGS: -dv			# to see the "Capturing" debug output
35# expect+1: warning: while evaluating "${:!echo word; ${:U(exit 13)}!}" with value "word": Command "echo word; (exit 13)" exited with status 13
36_:=	${:!echo word; ${:U(exit 13)}!}
37.MAKEFLAGS: -d0
38
39
40all:
41