From bab4ad2d85896e1552f9368584773a19fa223805 Mon Sep 17 00:00:00 2001
From: Robert Schmidt <robert.schmidt@openairinterface.org>
Date: Tue, 17 Oct 2023 07:16:47 +0200
Subject: [PATCH] Auto-detect if terminal supports colors

This enables build_oai to detect if the output terminal supports colors.
If it does, it will use colors in its output. If it does not, it will
just print the text, without color codes, improving legibility.
---
 cmake_targets/tools/build_helper | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/cmake_targets/tools/build_helper b/cmake_targets/tools/build_helper
index 2be24eef76..3028d9e56e 100755
--- a/cmake_targets/tools/build_helper
+++ b/cmake_targets/tools/build_helper
@@ -54,12 +54,17 @@ fi
 ###############################
 ## echo and  family
 ###############################
-red='\E[31m'
-green='\E[32m'
-yellow='\E[33m'
-blue='\E[1;34m'
-reset_color='\E[00m'
-COLORIZE=1
+# only emit color if connected to a terminal, and if it supports colors
+if [ -t 1 ]; then
+  num_colors=$(tput colors)
+  if [ -n "$num_colors" ] && [ "$num_colors" -ge 8 ]; then
+    red='\E[31m'
+    green='\E[32m'
+    yellow='\E[33m'
+    blue='\E[1;34m'
+    reset_color='\E[00m'
+  fi
+fi
 
 cecho()  {
     # Color-echo
@@ -68,8 +73,7 @@ cecho()  {
     local default_msg="No Message."
     message=${1:-$default_msg}
     color=${2:-$green}
-    [ "$COLORIZE" = "1" ] && message="$color$message$reset_color"
-    echo -e "$message"
+    echo -e "$color$message$reset_color"
     return
 }