From 72928bb96c0779f6ce05b5662835f6f1c4f1c1f0 Mon Sep 17 00:00:00 2001
From: Jan Macku <jamacku@redhat.com>
Date: Tue, 3 Oct 2023 13:21:44 +0200
Subject: [PATCH 1/2] fix: drop support for DEBUG in grep

It actually doesn't work as expected. Also the debug output is not very useful.
---
 src/functions.sh | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/functions.sh b/src/functions.sh
index 2bc439cf..5e960285 100644
--- a/src/functions.sh
+++ b/src/functions.sh
@@ -132,22 +132,22 @@ has_shebang () {
   local file="$1"
 
   # shell shebangs detection
-  if head -n1 "${file}" | grep ${RUNNER_DEBUG:+"--quiet"} -E '^\s*((#|!)|(#\s*!)|(!\s*#))\s*(/usr(/local)?)?/bin/(env\s+)?(sh|ash|bash|dash|ksh|bats)\b'; then
+  if head -n1 "${file}" | grep --quiet -E '^\s*((#|!)|(#\s*!)|(!\s*#))\s*(/usr(/local)?)?/bin/(env\s+)?(sh|ash|bash|dash|ksh|bats)\b'; then
     return 0
   fi
 
   # ShellCheck shell directive detection
-  if grep  ${RUNNER_DEBUG:+"--quiet"} -E '^\s*#\s*shellcheck\s+shell=(sh|ash|bash|dash|ksh|bats)\s*' "${file}"; then
+  if grep --quiet -E '^\s*#\s*shellcheck\s+shell=(sh|ash|bash|dash|ksh|bats)\s*' "${file}"; then
     return 0
   fi
 
   # Emacs mode detection
-  if grep  ${RUNNER_DEBUG:+"--quiet"} -E '^\s*#\s+-\*-\s+(sh|ash|bash|dash|ksh|bats)\s+-\*-\s*' "${file}"; then
+  if grep --quiet -E '^\s*#\s+-\*-\s+(sh|ash|bash|dash|ksh|bats)\s+-\*-\s*' "${file}"; then
     return 0
   fi
 
   # Vi and Vim modeline filetype detection
-  if grep  ${RUNNER_DEBUG:+"--quiet"} -E '^\s*#\s+vim?:\s+(set\s+)?(ft|filetype)=(sh|ash|bash|dash|ksh|bats)\s*' "${file}"; then
+  if grep --quiet -E '^\s*#\s+vim?:\s+(set\s+)?(ft|filetype)=(sh|ash|bash|dash|ksh|bats)\s*' "${file}"; then
     return 0
   fi
 

From 9536bc8fec6791209cadbd0c6dd5f6817a5de559 Mon Sep 17 00:00:00 2001
From: Jan Macku <jamacku@redhat.com>
Date: Wed, 4 Oct 2023 12:37:15 +0200
Subject: [PATCH 2/2] fix: uninitialized variable RUNNER_DEBUG

---
 src/functions.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/functions.sh b/src/functions.sh
index 5e960285..f113ce20 100644
--- a/src/functions.sh
+++ b/src/functions.sh
@@ -292,7 +292,7 @@ execute_shellcheck () {
 # Function to check if the action is run in a Debug mode
 is_debug () {
   local result
-  result=$(is_true "${RUNNER_DEBUG}")
+  result=$(is_true "${RUNNER_DEBUG:-0}")
 
   # shellcheck disable=SC2086
   # return require numeric value