+# Wait for the specified condition to be true, with the specified number of
+# max retries and delay between retries. Otherwise the 'elsescript' is
+# executed.
+proc wait_for_condition {maxtries delay e _else_ elsescript} {
+ while {[incr maxtries -1] >= 0} {
+ if {[uplevel 1 [list expr $e]]} break
+ after $delay
+ }
+ if {$maxtries == -1} {
+ uplevel 1 $elsescript
+ }
+}
+
+# Test if TERM looks like to support colors
+proc color_term {} {
+ expr {[info exists ::env(TERM)] && [string match *xterm* $::env(TERM)]}
+}
+
+proc colorstr {color str} {
+ if {[color_term]} {
+ set b 0
+ if {[string range $color 0 4] eq {bold-}} {
+ set b 1
+ set color [string range $color 5 end]
+ }
+ switch $color {
+ red {set colorcode {31}}
+ green {set colorcode {32}}
+ yellow {set colorcode {33}}
+ blue {set colorcode {34}}
+ magenta {set colorcode {35}}
+ cyan {set colorcode {36}}
+ white {set colorcode {37}}
+ default {set colorcode {37}}
+ }
+ if {$colorcode ne {}} {
+ return "\033\[$b;${colorcode};40m$str\033\[0m"
+ }
+ } else {
+ return $str
+ }
+}
+