From 1bf778020ae4b700f66ea4bcdecab9720e96b4b9 Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@midokura.com>
Date: Thu, 26 Sep 2024 21:18:14 +0900
Subject: [PATCH] tools/btdecode.sh: make grep overridable

This script seems to assume GNU grep, which is not commonly
available as "grep" on some platforms.  For examples, it's
more common to have it named "ggrep" on BSD-based systems
including macOS.

Ideally, I suppose we should avoid GNU dependencies like this
in general.  But I'm not motivated enough to rewrite this script
in a portable way today.

cf. https://www.gnu.org/software/grep/manual/grep.html#grep-Programs-1
---
 tools/btdecode.sh | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/btdecode.sh b/tools/btdecode.sh
index 964b0a3d0d..d5e04f699e 100755
--- a/tools/btdecode.sh
+++ b/tools/btdecode.sh
@@ -40,6 +40,8 @@ USAGE="USAGE: ${0} chip|toolchain-addr2line backtrace_file
 If the first argument contains 'addr2line', it will be used as the toolchain's addr2line tool.
 Otherwise, the script will try to identify the toolchain based on the chip name."
 
+GREP=${GREP:-grep}
+
 VALID_CHIPS=(
   "esp32"
   "esp32s2"
@@ -119,8 +121,8 @@ while read -r line; do
   fi
 
   if [[ $line =~ (\[CPU[0-9]+\]\ )?sched_dumpstack: ]]; then
-    task_id=$(echo $line | grep -oP 'backtrace\|\s*\K\d+')
-    addresses=$(echo $line | grep -oP '0x[0-9a-fA-F]+')
+    task_id=$(echo $line | ${GREP} -oP 'backtrace\|\s*\K\d+')
+    addresses=$(echo $line | ${GREP} -oP '0x[0-9a-fA-F]+')
     if $in_dump_tasks_section; then
       if [[ -n "${backtraces_after[$task_id]}" ]]; then
         backtraces_after[$task_id]="${backtraces_after[$task_id]} $addresses"
@@ -155,4 +157,4 @@ if $in_dump_tasks_section; then
     done
     echo ""
   done
-fi
\ No newline at end of file
+fi