Libguestfs - Nov 2021 - [PATCH v2v] convert/convert_windows.ml: Handle date formats with dots instead of /

If the ShortDatePattern is yy.M.d (as can happen for US locale) we may
not always reformat the date for schtasks.exe correctly.  For
explanation and testing see:

https://bugzilla.redhat.com/show_bug.cgi?id=1895323#c46
https://bugzilla.redhat.com/show_bug.cgi?id=1895323#c47
https://bugzilla.redhat.com/show_bug.cgi?id=1895323#c48

Thanks: Xiaodai Wang for testing and bug fix suggestions
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1895323
---
 convert/convert_windows.ml | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/convert/convert_windows.ml b/convert/convert_windows.ml
index 31e16723ba..eb614c8e95 100644
--- a/convert/convert_windows.ml
+++ b/convert/convert_windows.ml
@@ -400,12 +400,15 @@ popd
  and configure_qemu_ga files     List.iter (
      fun msi_path ->
-       (* Windows is a trashfire. https://stackoverflow.com/a/18730884 *)
+       (* Windows is a trashfire.
+        * https://stackoverflow.com/a/18730884
+        * https://bugzilla.redhat.com/show_bug.cgi?id=1895323
+        *)
        let fb_script = sprintf "\
 echo Removing any previously scheduled qemu-ga installation
 schtasks.exe /Delete /TN Firstboot-qemu-ga /F
 echo Scheduling delayed installation of qemu-ga from %s
-powershell.exe -command \"$d = (get-date).AddSeconds(120); $FormatHack =
($([System.Globalization.DateTimeFormatInfo]::CurrentInfo.ShortDatePattern)
-replace 'M+/', 'MM/') -replace 'd+/', 'dd/';
schtasks.exe /Create /SC ONCE /ST $d.ToString('HH:mm') /SD
$d.ToString($FormatHack) /RU SYSTEM /TN Firstboot-qemu-ga /TR \\\"C:\\%s
/forcerestart /qn /l+*vx C:\\%s.log\\\"\"
+powershell.exe -command \"$d = (get-date).AddSeconds(120); $FormatHack =
($([System.Globalization.DateTimeFormatInfo]::CurrentInfo.ShortDatePattern)
-replace 'M+', 'MM') -replace 'd+', 'dd';
schtasks.exe /Create /SC ONCE /ST $d.ToString('HH:mm') /SD
$d.ToString($FormatHack) /RU SYSTEM /TN Firstboot-qemu-ga /TR \\\"C:\\%s
/forcerestart /qn /l+*vx C:\\%s.log\\\"\"
       "
       msi_path msi_path msi_path in
       Firstboot.add_firstboot_script g inspect.i_root
-- 
2.32.0