pass tags to filter and match via arguments

Makefile

@@ -88,7 +88,7 @@ staticsymbols:
 	tclsh utils/build-static-symbols.tcl > staticsymbols.h
 
 test:
-	tclsh8.5 tests/test_helper.tcl
+	tclsh8.5 tests/test_helper.tcl --tags "${TAGS}"
 
 bench:
 	./redis-benchmark

tests/support/test.tcl

@@ -15,7 +15,7 @@ proc test {name code okpattern} {
     if {[llength $::allowtags] > 0} {
         set matched 0
         foreach tag $::allowtags {
-            if {[lsearch $::tags $tag]} {
+            if {[lsearch $::tags $tag] >= 0} {
                 incr matched
             }
         }

tests/test_helper.tcl

@@ -91,6 +91,25 @@ proc main {} {
     cleanup
 }
 
+# parse arguments
+for {set j 0} {$j < [llength $argv]} {incr j} {
+    set opt [lindex $argv $j]
+    set arg [lindex $argv [expr $j+1]]
+    if {$opt eq {--tags}} {
+        foreach tag $arg {
+            if {[string index $tag 0] eq "-"} {
+                lappend ::denytags [string range $tag 1 end]
+            } else {
+                lappend ::allowtags $tag
+            }
+        }
+        incr j
+    } else {
+        puts "Wrong argument: $opt"
+        exit 1
+    }
+}
+
 if {[catch { main } err]} {
     if {[string length $err] > 0} {
         # only display error when not generated by the test suite