[latex3-commits] [git/LaTeX3-latex3-latex3] main: Avoid blank entry in seq if "ls" gives nothing (2002c197a)

[Joseph Wright]

Repository : https://github.com/latex3/latex3
On branch  : main
Link       : https://github.com/latex3/latex3/commit/2002c197aae89a53f496b7344eb0278e617ceb6a

>---------------------------------------------------------------

commit 2002c197aae89a53f496b7344eb0278e617ceb6a
Author: Joseph Wright <joseph.wright at morningstar2.co.uk>
Date:   Wed Apr 6 07:38:50 2022 +0100

    Avoid blank entry in seq if "ls" gives nothing


>---------------------------------------------------------------

2002c197aae89a53f496b7344eb0278e617ceb6a
 l3experimental/CHANGELOG.md                | 4 ++++
 l3experimental/l3sys-shell/l3sys-shell.dtx | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/l3experimental/CHANGELOG.md b/l3experimental/CHANGELOG.md
index adb32cd3b..b12532edd 100644
--- a/l3experimental/CHANGELOG.md
+++ b/l3experimental/CHANGELOG.md
@@ -7,6 +7,10 @@ this project uses date-based 'snapshot' version identifiers.
 
 ## [Unreleased]
 
+### Changed
+- Return an empty `seq` when `\sys_shell_split_ls:nN` is applied with a
+  glob which matched no entries
+
 ## [2022-02-05]
 
 ### Changed
diff --git a/l3experimental/l3sys-shell/l3sys-shell.dtx b/l3experimental/l3sys-shell/l3sys-shell.dtx
index cf8ecdf18..6975f65d0 100644
--- a/l3experimental/l3sys-shell/l3sys-shell.dtx
+++ b/l3experimental/l3sys-shell/l3sys-shell.dtx
@@ -393,6 +393,8 @@
         \seq_set_split:NnV #2 { \char_generate:nn { `\^^M } { 12 } }
           \exp_not:N \l_@@_tmp_tl
         \seq_pop_right:NN #2 \exp_not:N \l_@@_tmp_tl
+        \exp_not:N \tl_if_blank:eTF { \exp_not:N \seq_item:Nn #2 { 1 } }
+          { \seq_clear:N #2 }
       }
   }
 %    \end{macrocode}