1 files changed, 16 insertions, 0 deletions
diff --git a/tests/cluster/tests/helpers/onlydots.tcl b/tests/cluster/tests/helpers/onlydots.tcl
new file mode 100644
index 0000000..4a6d1ae
--- /dev/null
+++ b/tests/cluster/tests/helpers/onlydots.tcl
@@ -0,0 +1,16 @@
+# Read the standard input and only shows dots in the output, filtering out
+# all the other characters. Designed to avoid bufferization so that when
+# we get the output of redis-trib and want to show just the dots, we'll see
+# the dots as soon as redis-trib will output them.
+
+fconfigure stdin -buffering none
+
+while 1 {
+    set c [read stdin 1]
+    if {$c eq {}} {
+        exit 0; # EOF
+    } elseif {$c eq {.}} {
+        puts -nonewline .
+        flush stdout
+    }
+}