make color setup safe in non-interactive environmentsHEADmain

When run by cron, TERM may be unset, which causes tput to fail with:

  tput: No value for $TERM and no -T specified

Initialize color variables to empty strings by default, then apply
tput-based colors only when terminal capabilities are available. This
prevents startup failure in non-interactive runs while preserving
colored output in interactive shells.

1 files changed, 9 insertions, 3 deletions

diff --git a/iptv.sh b/iptv.sh
index e702a55..78e1484 100755
--- a/iptv.sh
+++ b/iptv.sh
@@ -5,9 +5,15 @@ set -euo pipefail
 CURL_ARGS=(--silent --max-time 6)
 
 # Color definitions
-COLOR_DANGER=$(tput setaf 1)
-COLOR_SUCCESS=$(tput setaf 2)
-COLOR_RESET=$(tput sgr0)
+COLOR_DANGER=''
+COLOR_SUCCESS=''
+COLOR_RESET=''
+
+if [[ -n "${TERM-}" ]] && command -v tput &>/dev/null && tput sgr0 &>/dev/null; then
+  COLOR_DANGER=$(tput setaf 1)
+  COLOR_SUCCESS=$(tput setaf 2)
+  COLOR_RESET=$(tput sgr0)
+fi
 
 show_usage () {
   echo "Usage: $0 [COMMAND] [OPTIONS]"