Revert "test-lib: support running tests under valgrind in parallel"

This reverts commit ad0e623.

--valgrind-parallel was broken from the start: during review I made
the whole valgrind setup code conditional on not being a
--valgrind-parallel worker child.  But even the children crucially
need $GIT_VALGRIND to be set; it should therefore have been set
outside the conditional.

The fix would be a two-liner, but since the introduction of the
feature, almost four months have passed without anyone noticing that
it is broken.  So this feature is not worth the about hundred lines of
test-lib.sh complexity.  Revert it.

Signed-off-by: Thomas Rast <tr@thomasrast.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/test-lib.sh

@@ -205,15 +205,6 @@ do
 	--valgrind-only=*)
 		valgrind_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
 		shift ;;
-	--valgrind-parallel=*)
-		valgrind_parallel=$(expr "z$1" : 'z[^=]*=\(.*\)')
-		shift ;;
-	--valgrind-only-stride=*)
-		valgrind_only_stride=$(expr "z$1" : 'z[^=]*=\(.*\)')
-		shift ;;
-	--valgrind-only-offset=*)
-		valgrind_only_offset=$(expr "z$1" : 'z[^=]*=\(.*\)')
-		shift ;;
 	--tee)
 		shift ;; # was handled already
 	--root=*)
@@ -227,7 +218,7 @@ do
 	esac
 done
 
-if test -n "$valgrind_only" || test -n "$valgrind_only_stride"
+if test -n "$valgrind_only"
 then
 	test -z "$valgrind" && valgrind=memcheck
 	test -z "$verbose" && verbose_only="$valgrind_only"
@@ -377,9 +368,7 @@ maybe_teardown_verbose () {
 last_verbose=t
 maybe_setup_verbose () {
 	test -z "$verbose_only" && return
-	if match_pattern_list $test_count $verbose_only ||
-		{ test -n "$valgrind_only_stride" &&
-		expr $test_count "%" $valgrind_only_stride - $valgrind_only_offset = 0 >/dev/null; }
+	if match_pattern_list $test_count $verbose_only
 	then
 		exec 4>&2 3>&1
 		# Emit a delimiting blank line when going from
@@ -403,17 +392,13 @@ maybe_teardown_valgrind () {
 
 maybe_setup_valgrind () {
 	test -z "$GIT_VALGRIND" && return
-	if test -z "$valgrind_only" && test -z "$valgrind_only_stride"
+	if test -z "$valgrind_only"
 	then
 		GIT_VALGRIND_ENABLED=t
 		return
 	fi
 	GIT_VALGRIND_ENABLED=
 	if match_pattern_list $test_count $valgrind_only
-	then
-		GIT_VALGRIND_ENABLED=t
-	elif test -n "$valgrind_only_stride" &&
-		expr $test_count "%" $valgrind_only_stride - $valgrind_only_offset = 0 >/dev/null
 	then
 		GIT_VALGRIND_ENABLED=t
 	fi
@@ -568,9 +553,6 @@ test_done () {
 	esac
 }
 
-
-# Set up a directory that we can put in PATH which redirects all git
-# calls to 'valgrind git ...'.
 if test -n "$valgrind"
 then
 	make_symlink () {
@@ -618,42 +600,33 @@ then
 		make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 	}
 
-	# In the case of --valgrind-parallel, we only need to do the
-	# wrapping once, in the main script.  The worker children all
-	# have $valgrind_only_stride set, so we can skip based on that.
-	if test -z "$valgrind_only_stride"
-	then
-		# override all git executables in TEST_DIRECTORY/..
-		GIT_VALGRIND=$TEST_DIRECTORY/valgrind
-		mkdir -p "$GIT_VALGRIND"/bin
-		for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
-		do
-			make_valgrind_symlink $file
-		done
-		# special-case the mergetools loadables
-		make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
-		OLDIFS=$IFS
-		IFS=:
-		for path in $PATH
+	# override all git executables in TEST_DIRECTORY/..
+	GIT_VALGRIND=$TEST_DIRECTORY/valgrind
+	mkdir -p "$GIT_VALGRIND"/bin
+	for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
+	do
+		make_valgrind_symlink $file
+	done
+	# special-case the mergetools loadables
+	make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
+	OLDIFS=$IFS
+	IFS=:
+	for path in $PATH
+	do
+		ls "$path"/git-* 2> /dev/null |
+		while read file
 		do
-			ls "$path"/git-* 2> /dev/null |
-			while read file
-			do
-				make_valgrind_symlink "$file"
-			done
+			make_valgrind_symlink "$file"
 		done
-		IFS=$OLDIFS
-	fi
+	done
+	IFS=$OLDIFS
 	PATH=$GIT_VALGRIND/bin:$PATH
 	GIT_EXEC_PATH=$GIT_VALGRIND/bin
 	export GIT_VALGRIND
 	GIT_VALGRIND_MODE="$valgrind"
 	export GIT_VALGRIND_MODE
 	GIT_VALGRIND_ENABLED=t
-	if test -n "$valgrind_only" || test -n "$valgrind_only_stride"
-	then
-		GIT_VALGRIND_ENABLED=
-	fi
+	test -n "$valgrind_only" && GIT_VALGRIND_ENABLED=
 	export GIT_VALGRIND_ENABLED
 elif test -n "$GIT_TEST_INSTALLED"
 then
@@ -739,41 +712,6 @@ then
 else
 	mkdir -p "$TRASH_DIRECTORY"
 fi
-
-# Gross hack to spawn N sub-instances of the tests in parallel, and
-# summarize the results.  Note that if this is enabled, the script
-# terminates at the end of this 'if' block.
-if test -n "$valgrind_parallel"
-then
-	for i in $(test_seq 1 $valgrind_parallel)
-	do
-		root="$TRASH_DIRECTORY/vgparallel-$i"
-		mkdir "$root"
-		TEST_OUTPUT_DIRECTORY="$root" \
-			${SHELL_PATH} "$0" \
-			--root="$root" --statusprefix="[$i] " \
-			--valgrind="$valgrind" \
-			--valgrind-only-stride="$valgrind_parallel" \
-			--valgrind-only-offset="$i" &
-		pids="$pids $!"
-	done
-	trap "kill $pids" INT TERM HUP
-	wait $pids
-	trap - INT TERM HUP
-	for i in $(test_seq 1 $valgrind_parallel)
-	do
-		root="$TRASH_DIRECTORY/vgparallel-$i"
-		eval "$(cat "$root/test-results/$(basename "$0" .sh)"-*.counts |
-			sed 's/^\([a-z][a-z]*\) \([0-9][0-9]*\)/inner_\1=\2/')"
-		test_count=$(expr $test_count + $inner_total)
-		test_success=$(expr $test_success + $inner_success)
-		test_fixed=$(expr $test_fixed + $inner_fixed)
-		test_broken=$(expr $test_broken + $inner_broken)
-		test_failure=$(expr $test_failure + $inner_failed)
-	done
-	test_done
-fi
-
 # Use -P to resolve symlinks in our working directory so that the cwd
 # in subprocesses like git equals our $PWD (for pathname comparisons).
 cd -P "$TRASH_DIRECTORY" || exit 1