diff options
Diffstat (limited to 'unit-tests/varmod-shell.mk')
| -rw-r--r-- | unit-tests/varmod-shell.mk | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/unit-tests/varmod-shell.mk b/unit-tests/varmod-shell.mk index 052968004f1b..db82e302f2a8 100644 --- a/unit-tests/varmod-shell.mk +++ b/unit-tests/varmod-shell.mk @@ -1,9 +1,35 @@ -# $NetBSD: varmod-shell.mk,v 1.2 2020/08/16 14:25:16 rillig Exp $ +# $NetBSD: varmod-shell.mk,v 1.5 2020/11/17 20:11:02 rillig Exp $ # # Tests for the :sh variable modifier, which runs the shell command # given by the variable value and returns its output. +# +# This modifier has been added on 2000-04-29. +# +# See also: +# ApplyModifier_ShellCommand # TODO: Implementation +# The command to be run is enclosed between exclamation marks. +# The previous value of the expression is irrelevant for this modifier. +# The :!cmd! modifier turns an undefined expression into a defined one. +.if ${:!echo word!} != "word" +. error +.endif + +# If the command exits with non-zero, an error message is printed. +# XXX: Processing continues as usual though. +# +# Between 2000-04-29 and 2020-11-17, the error message mentioned the previous +# value of the expression (which is usually an empty string) instead of the +# command that was executed. It's strange that such a simple bug could +# survive such a long time. +.if ${:!echo word; false!} != "word" +. error +.endif +.if ${:Uprevious value:!echo word; false!} != "word" +. error +.endif + all: @:; |