tests/checks/check-completions: fix for embed-data builds

share/functions/__fish_list_files.fish

@@ -0,0 +1,16 @@
+# localization: skip(private)
+function __fish_list_files
+    set -l dir $argv[1]
+    if set -q __fish_data_dir[1]
+        # Construct a directory prefix without trailing slash.
+        if test -n "$dir"
+            set dir $__fish_data_dir/$dir
+        else
+            set dir $__fish_data_dir
+        end
+        set -l files $dir/**
+        string replace -- $dir/ '' $files
+    else
+        status list-files $dir
+    end
+end

share/functions/__fish_with_file.fish

@@ -0,0 +1,10 @@
+# localization: skip(private)
+function __fish_with_file
+    set -l file $argv[1]
+    set -l cmd $argv[2..]
+    if set -q __fish_data_dir[1]
+        $cmd $__fish_data_dir/$file
+    else
+        status get-file $file | $cmd
+    end
+end