+######################################################################
+##
+## Tcl/Tk sanity check
+
+if {[catch {package require Tcl 8.4} err]
+ || [catch {package require Tk 8.4} err]
+} {
+ catch {wm withdraw .}
+ tk_messageBox \
+ -icon error \
+ -type ok \
+ -title "git-gui: fatal error" \
+ -message $err
+ exit 1
+}
+
+######################################################################
+##
+## enable verbose loading?
+
+if {![catch {set _verbose $env(GITGUI_VERBOSE)}]} {
+ unset _verbose
+ rename auto_load real__auto_load
+ proc auto_load {name args} {
+ puts stderr "auto_load $name"
+ return [uplevel 1 real__auto_load $name $args]
+ }
+ rename source real__source
+ proc source {name} {
+ puts stderr "source $name"
+ uplevel 1 real__source $name
+ }
+}
+