use more precise matching for group detection

Author: jordancarlin

bin/build_container

@@ -36,10 +36,11 @@ if [ $NEED_SUDO -eq 0 ]; then
   FAKEROOT=--fakeroot
   echo "Using fakeroot"
 else
-  if [[ ! -z "$GITHUB_RUN_ID" || `groups` == *"sudo"* || `groups` == *"wheel"* ]]; then
+  if [[ -n "$GITHUB_RUN_ID" || $(groups) =~ (^|[[:space:]])(sudo|wheel)([[:space:]]|$) ]]; then
     # user has sudo permission
     SUDO=sudo
     FAKEROOT=""
+    echo "Using sudo"
   else
     echo "You appear to have neither namespace or sudo permission. You need one to build."
     echo "  Either: "
@@ -51,6 +52,8 @@ else
   fi
 fi
 
+exit
+
 # make container home directory (~)
 if [ ! -d "${ROOT}/.home" ]; then
   mkdir -p ${ROOT}/.home