fix: invalid message when no file pattern is used (#173)

Author: jackton1

entrypoint.sh

@@ -4,12 +4,19 @@ set -e
 
 git config --local core.autocrlf "$INPUT_AUTO_CRLF"
 
-echo "Checking for file changes: \"${INPUT_FILES}\"..."
+if [[ -n "$INPUT_FILES" ]]; then
+  echo "Checking for file changes: \"${INPUT_FILES}\"..."
+  
+  TRACKED_FILES=$(git diff --diff-filter=ACMUXTR --name-only | grep -E "(${INPUT_FILES})" | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')
 
-TRACKED_FILES=$(git diff --diff-filter=ACMUXTR --name-only | grep -E "(${INPUT_FILES})" | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')
+  # Find untracked changes
+  UNTRACKED_FILES=$(git ls-files --others --exclude-standard | grep -E "(${INPUT_FILES})" | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')
+else
+  TRACKED_FILES=$(git diff --diff-filter=ACMUXTR --name-only | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')
 
-# Find untracked changes
-UNTRACKED_FILES=$(git ls-files --others --exclude-standard | grep -E "(${INPUT_FILES})" | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')
+  # Find untracked changes
+  UNTRACKED_FILES=$(git ls-files --others --exclude-standard | awk -v d="|" '{s=(NR==1?s:s d)$0}END{print s}')
+fi
 
 CHANGED_FILES=""