diff options
Diffstat (limited to 'contrib/bmake/unit-tests/directive-export.mk')
| -rw-r--r-- | contrib/bmake/unit-tests/directive-export.mk | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/contrib/bmake/unit-tests/directive-export.mk b/contrib/bmake/unit-tests/directive-export.mk index 942d4b371bbd..08109814bcfd 100644 --- a/contrib/bmake/unit-tests/directive-export.mk +++ b/contrib/bmake/unit-tests/directive-export.mk @@ -1,4 +1,4 @@ -# $NetBSD: directive-export.mk,v 1.8 2021/02/16 19:01:18 rillig Exp $ +# $NetBSD: directive-export.mk,v 1.10 2023/11/19 09:45:19 rillig Exp $ # # Tests for the .export directive. # @@ -35,10 +35,33 @@ VAR= value $$ ${INDIRECT} .export ${:U} -# Trigger the "This isn't going to end well" in ExportVarEnv. +# Before a child process is started, whether for the '!=' assignment operator +# or for the ':sh' modifier, all variables that were marked for being exported +# are expanded and then exported. If expanding such a variable requires +# running a child command, the marked-as-exported variables would need to be +# exported first, ending in an endless loop. To avoid this endless loop, +# don't export the variables while preparing a child process, see +# ExportVarEnv. EMPTY_SHELL= ${:sh} .export EMPTY_SHELL # only marked for export at this point _!= :;: # Force the variable to be actually exported. +# If the '.export' directive exports a variable whose value contains a '$', +# the actual export action is deferred until a subprocess is started, assuming +# that only subprocesses access the environment variables. The ':localtime' +# modifier depends on the 'TZ' environment variable, without any subprocess. +export TZ=${UTC} +# expect+1: 00:00:00 +.info ${%T:L:localtime=86400} +INDIRECT_TZ= ${:UAmerica/Los_Angeles} +TZ= ${INDIRECT_TZ} +.export TZ +# expect+1: 00:00:00 +.info ${%T:L:localtime=86400} +_!= echo 'force exporting the environment variables' +# expect+1: 16:00:00 +.info ${%T:L:localtime=86400} + + all: |