Removed experimental -z flag and old version check code

dockcheck.sh

@@ -34,7 +34,6 @@ Help() {
   echo "-s     Include stopped containers in the check. (Logic: docker ps -a)."
   echo "-t     Set a timeout (in seconds) per container for registry checkups, 10 is default."
   echo "-v     Prints current version."
-  echo "-z     [Experimental] Check images asynchrously for increased performance."
   echo
   echo "Project source: $Github"
 }
@@ -49,7 +48,7 @@ c_reset="\033[0m"
 
 Timeout=10
 Stopped=""
-while getopts "aynpfrhlisvmzc:e:d:t:" options; do
+while getopts "aynpfrhlisvmc:e:d:t:" options; do
   case "${options}" in
     a|y) AutoUp="yes" ;;
     c)   CollectorTextFileDirectory="${OPTARG}"
@@ -65,7 +64,6 @@ while getopts "aynpfrhlisvmzc:e:d:t:" options; do
     s)   Stopped="-a" ;;
     t)   Timeout="${OPTARG}" ;;
     v)   printf "%s\n" "$VERSION" ; exit 0 ;;
-    z)   ParallelCheck=1 ;;
     d)   DaysOld=${OPTARG}
          if ! [[ $DaysOld =~ ^[0-9]+$ ]] ; then { printf "Days -d argument given (%s) is not a number.\n" "${DaysOld}" ; exit 2 ; } ; fi ;;
     h|*) Help ; exit 2 ;;
@@ -284,34 +282,7 @@ if [[ $t_out ]]; then
 else t_out=""
 fi
 
-if [[ $ParallelCheck -ne 1 ]]; then
+check_image() {
-  # Check the image-hash of every running container VS the registry
-  for i in $(docker ps $Stopped --filter "name=$SearchName" --format '{{.Names}}') ; do
-    ((RegCheckQue+=1))
-    progress_bar "$RegCheckQue" "$ContCount"
-    # Looping every item over the list of excluded names and skipping
-    for e in "${Excludes[@]}" ; do [[ "$i" == "$e" ]] && continue 2 ; done
-    ImageId=$(docker inspect "$i" --format='{{.Image}}')
-    RepoUrl=$(docker inspect "$i" --format='{{.Config.Image}}')
-    LocalHash=$(docker image inspect "$ImageId" --format '{{.RepoDigests}}')
-    # Checking for errors while setting the variable
-    if RegHash=$(${t_out} $regbin -v error image digest --list "$RepoUrl" 2>&1) ; then
-      if [[ "$LocalHash" = *"$RegHash"* ]] ; then
-        NoUpdates+=("$i")
-      else
-        if [[ -n "$DaysOld" ]] && ! datecheck ; then
-          NoUpdates+=("+$i ${ImageAge}d")
-        else
-          GotUpdates+=("$i")
-        fi
-      fi
-    else
-      # Here the RegHash is the result of an error code
-      GotErrors+=("$i - ${RegHash}")
-    fi
-  done
-else
-  check_image() {
   i="$1"
   local Excludes=($Excludes_string)
   local skip
@@ -342,14 +313,15 @@ else
     # Here the RegHash is the result of an error code
     echo GotErrors "$i - ${RegHash}"
   fi
-  }
+}
 
-  export -f check_image datecheck
+# Make required functions and variables available to subprocesses
-  export Excludes_string="${Excludes[@]}" # Can only export scalar variables
+export -f check_image datecheck
-  export t_out regbin RepoUrl DaysOld
+export Excludes_string="${Excludes[@]}" # Can only export scalar variables
+export t_out regbin RepoUrl DaysOld
 
-  # Asynchronously check the image-hash of every running container VS the registry
+# Asynchronously check the image-hash of every running container VS the registry
-  while read -r line; do
+while read -r line; do
   ((RegCheckQue+=1))
   progress_bar "$RegCheckQue" "$ContCount"
 
@@ -363,11 +335,10 @@ else
     Skip) ;;
     *) echo "Error! Unexpected output from subprocess: ${line}" ;;
   esac
-  done < <( \
+done < <( \
   docker ps $Stopped --filter "name=$SearchName" --format '{{.Names}}' | \
   xargs -P 32 -I {} bash -c 'check_image "{}"' \
-  )
+)
-fi
 
 # Sort arrays alphabetically
 IFS=$'\n'