Merge branch 'ml/git-gui-exec-path-fix' into next

Fix recent regression in Git-GUI that fails to run hook scripts at
all.

* ml/git-gui-exec-path-fix:
  git-gui - use git-hook, honor core.hooksPath
  git-gui - re-enable use of hook scripts

git-gui/git-gui.sh

@@ -118,7 +118,7 @@ proc sanitize_command_line {command_line from_index} {
  set i $from_index
  while {$i < [llength $command_line]} {
  set cmd [lindex $command_line $i]
- if {[file pathtype $cmd] ne "absolute"} {
+ if {[llength [file split $cmd]] < 2} {
  set fullpath [_which $cmd]
  if {$fullpath eq ""} {
  throw {NOT-FOUND} "$cmd not found in PATH"
@@ -661,31 +661,8 @@ proc git_write {args} {
 }
 
 proc githook_read {hook_name args} {
- set pchook [gitdir hooks $hook_name]
- lappend args 2>@1
-
- # On Windows [file executable] might lie so we need to ask
- # the shell if the hook is executable. Yes that's annoying.
- #
- if {[is_Windows]} {
- upvar #0 _sh interp
- if {![info exists interp]} {
- set interp [_which sh]
- }
- if {$interp eq {}} {
- error "hook execution requires sh (not in PATH)"
- }
-
- set scr {if test -x "$1";then exec "$@";fi}
- set sh_c [list $interp -c $scr $interp $pchook]
- return [_open_stdout_stderr [concat $sh_c $args]]
- }
-
- if {[file executable $pchook]} {
- return [_open_stdout_stderr [concat [list $pchook] $args]]
- }
-
- return {}
+ set cmd [concat git hook run --ignore-missing $hook_name -- $args 2>@1]
+ return [_open_stdout_stderr $cmd]
 }
 
 proc kill_file_process {fd} {