git-gui: Auto-rescan on activate

Do an automatic rescan whenever the git-gui window receives focus. Most other
GUI tools do this, and it's very convenient; no more pressing F5 manually.

People who don't like this behavior can turn it off in the Options dialog.

Signed-off-by: Stefan Haller <stefan@haller-berlin.de>
Signed-off-by: Pratyush Yadav <me@yadavpratyush.com>

Author: stefanhaller

git-gui.sh

@@ -906,6 +906,7 @@ set font_descs {
 }
 set default_config(gui.stageuntracked) ask
 set default_config(gui.displayuntracked) true
+set default_config(gui.autorescan) true
 
 ######################################################################
 ##
@@ -4007,6 +4008,10 @@ bind .   <Alt-Key-2> {focus_widget $::ui_index}
 bind .   <Alt-Key-3> {focus $::ui_diff}
 bind .   <Alt-Key-4> {focus $::ui_comm}
 
+if {[is_config_true gui.autorescan]} {
+	bind .   <FocusIn>  { if {"%W" eq "."} do_rescan }
+}
+
 set file_lists_last_clicked($ui_index) {}
 set file_lists_last_clicked($ui_workdir) {}
 

lib/option.tcl

@@ -145,6 +145,7 @@ proc do_options {} {
 		{b merge.diffstat {mc "Show Diffstat After Merge"}}
 		{t merge.tool {mc "Use Merge Tool"}}
 
+		{b gui.autorescan  {mc "Auto-Rescan On Activate"}}
 		{b gui.trustmtime  {mc "Trust File Modification Timestamps"}}
 		{b gui.pruneduringfetch {mc "Prune Tracking Branches During Fetch"}}
 		{b gui.matchtrackingbranch {mc "Match Tracking Branches"}}