Module Name: src
Committed By: rillig
Date: Mon Feb 1 20:31:41 UTC 2021
Modified Files:
src/distrib/sets/lists/tests: mi
src/usr.bin/make/unit-tests: Makefile
Added Files:
src/usr.bin/make/unit-tests: cmdline-redirect-stdin.exp
cmdline-redirect-stdin.mk
Log Message:
make: add test for reading from make's stdin
Just out of curiosity whether that really works. It does.
To generate a diff of this commit:
cvs rdiff -u -r1.1014 -r1.1015 src/distrib/sets/lists/tests/mi
cvs rdiff -u -r1.264 -r1.265 src/usr.bin/make/unit-tests/Makefile
cvs rdiff -u -r0 -r1.1 src/usr.bin/make/unit-tests/cmdline-redirect-stdin.exp \
src/usr.bin/make/unit-tests/cmdline-redirect-stdin.mk
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/distrib/sets/lists/tests/mi
diff -u src/distrib/sets/lists/tests/mi:1.1014 src/distrib/sets/lists/tests/mi:1.1015
--- src/distrib/sets/lists/tests/mi:1.1014 Sat Jan 30 12:46:38 2021
+++ src/distrib/sets/lists/tests/mi Mon Feb 1 20:31:41 2021
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.1014 2021/01/30 12:46:38 rillig Exp $
+# $NetBSD: mi,v 1.1015 2021/02/01 20:31:41 rillig Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
#
@@ -4826,6 +4826,8 @@
./usr/tests/usr.bin/make/unit-tests/cmd-errors.mk tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/make/unit-tests/cmd-interrupt.exp tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/make/unit-tests/cmd-interrupt.mk tests-usr.bin-tests compattestfile,atf
+./usr/tests/usr.bin/make/unit-tests/cmdline-redirect-stdin.exp tests-usr.bin-tests compattestfile,atf
+./usr/tests/usr.bin/make/unit-tests/cmdline-redirect-stdin.mk tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/make/unit-tests/cmdline-undefined.exp tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/make/unit-tests/cmdline-undefined.mk tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/make/unit-tests/cmdline.exp tests-usr.bin-tests compattestfile,atf
Index: src/usr.bin/make/unit-tests/Makefile
diff -u src/usr.bin/make/unit-tests/Makefile:1.264 src/usr.bin/make/unit-tests/Makefile:1.265
--- src/usr.bin/make/unit-tests/Makefile:1.264 Sat Jan 30 12:46:38 2021
+++ src/usr.bin/make/unit-tests/Makefile Mon Feb 1 20:31:41 2021
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.264 2021/01/30 12:46:38 rillig Exp $
+# $NetBSD: Makefile,v 1.265 2021/02/01 20:31:41 rillig Exp $
#
# Unit tests for make(1)
#
@@ -46,6 +46,7 @@ TESTS+= cmd-errors-jobs
TESTS+= cmd-errors-lint
TESTS+= cmd-interrupt
TESTS+= cmdline
+TESTS+= cmdline-redirect-stdin
TESTS+= cmdline-undefined
TESTS+= comment
TESTS+= compat-error
Added files:
Index: src/usr.bin/make/unit-tests/cmdline-redirect-stdin.exp
diff -u /dev/null src/usr.bin/make/unit-tests/cmdline-redirect-stdin.exp:1.1
--- /dev/null Mon Feb 1 20:31:41 2021
+++ src/usr.bin/make/unit-tests/cmdline-redirect-stdin.exp Mon Feb 1 20:31:41 2021
@@ -0,0 +1 @@
+exit status 0
Index: src/usr.bin/make/unit-tests/cmdline-redirect-stdin.mk
diff -u /dev/null src/usr.bin/make/unit-tests/cmdline-redirect-stdin.mk:1.1
--- /dev/null Mon Feb 1 20:31:41 2021
+++ src/usr.bin/make/unit-tests/cmdline-redirect-stdin.mk Mon Feb 1 20:31:41 2021
@@ -0,0 +1,34 @@
+# $NetBSD: cmdline-redirect-stdin.mk,v 1.1 2021/02/01 20:31:41 rillig Exp $
+#
+# Demonstrate that the '!=' assignment operator can read individual lines
+# from make's stdin.
+#
+# This edge case is an implementation detail that has no practical
+# application.
+
+all: .PHONY
+ @printf '%s\n' "first line" "second line" \
+ | ${MAKE} -f ${MAKEFILE} read-lines
+
+.if make(read-lines)
+line1!= read line; echo "$$line"
+line2!= read line; echo "$$line"
+
+.if ${line1} != "first line"
+. error line1="${line1}"
+
+.elif ${line2} == ""
+# If this branch is ever reached, the shell from the assignment to line1
+# probably buffers its input. Most shells use unbuffered stdin, and this
+# is actually specified by POSIX, which says that "The read utility shall
+# read a single line from standard input". This is the reason why the shell
+# reads its input byte by byte, which makes it terribly slow for practical
+# applications.
+. error The shell's read command does not read a single line.
+
+.elif ${line2} != "second line"
+. error line2="${line2}"
+.endif
+
+read-lines: .PHONY
+.endif
