diff options
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/template.source.sh | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/lib/template.source.sh b/src/lib/template.source.sh index cd44a45..cfa826e 100644 --- a/src/lib/template.source.sh +++ b/src/lib/template.source.sh @@ -582,7 +582,12 @@ prepare_template_render_var__preview_num_next_html() { local context_value template_context_value_to context_value "$context_name" "$source_name" - if [ -n "$context_value" ]; then + # Guard the arithmetic: only a non-negative integer is safe to feed to + # $(( )). An empty or non-numeric context value (e.g. a stray string) would + # otherwise throw a bash arithmetic syntax error and, under set -e, abort the + # whole script. Treat any invalid/missing preview_num as "no neighbour" and + # emit an empty render value, matching the missing-value behaviour. + if [[ "$context_value" =~ ^[0-9]+$ ]]; then html_escape_to out_ref "$(( context_value + 1 ))" else out_ref='' @@ -598,7 +603,12 @@ prepare_template_render_var__preview_num_prev_html() { local context_value template_context_value_to context_value "$context_name" "$source_name" - if [ -n "$context_value" ]; then + # Guard the arithmetic: only a non-negative integer is safe to feed to + # $(( )). An empty or non-numeric context value would otherwise throw a bash + # arithmetic syntax error and, under set -e, abort the whole script. Treat + # any invalid/missing preview_num as "no neighbour" and emit an empty render + # value, mirroring the next-html handler. + if [[ "$context_value" =~ ^[0-9]+$ ]]; then html_escape_to out_ref "$(( context_value - 1 ))" else out_ref='' |