tg update: Do not use ${:n:m} substitution (bash extension)

diff --git a/tg-update.sh b/tg-update.sh
index 563a62d8fbb293b4140fdd17067caf552d215e9c..27a8e81086f7eb71ba4c4c4d0e19aeabd6842a09 100644 (file)
--- a/tg-update.sh
+++ b/tg-update.sh
@@ -39,8 +39,8 @@ if [ -s "$depcheck" ]; then
                sed 's/^\([^+]\)/-\1/' | # now each line is +branch or -branch (+ == recurse)
                uniq -s 1 | # fold branch lines; + always comes before - and thus wins within uniq
                while read depline; do
-                       action="${depline:0:1}"
-                       dep="${depline:1}"
+                       action="$(echo "$depline" | cut -c 1)"
+                       dep="$(echo "$depline" | cut -c 2-)"
 
                        # We do not distinguish between dependencies out-of-date
                        # and base out-of-date cases for $dep here, but thanks