new: implement --checkpoint for mp-check

mp-check/mp-check.sh

@@ -70,6 +70,7 @@ help_cmd() {
   info  "MatterLinux package check script (mtsc ${MTSC_VERSION})" # sourced from mtsc-common
   info  "Usage: ${0} <options> [archive file/source dir]"
   info  "Options:"
+  echo_color "   $BOLD--checkpoint$RESET: specify a starting point for the check"
   echo_color "   $BOLD--fail-warn$RESET:  fail on a warning"
   echo_color "   $BOLD--no-warn$RESET:    ignore warnings"
   echo
@@ -316,6 +317,7 @@ check_source(){
 #################
 ## main script ##
 #################
+OPT_CHECKPOINT=""
 OPT_FAIL_WARN=0
 OPT_NO_WARN=0
 OPT_TARGET=()
@@ -325,6 +327,8 @@ for arg in "$@"; do
     "--help")
       help_cmd
       exit 0 ;;
+    "--checkpoint"*)
+      OPT_CHECKPOINT="$(echo "${arg}" | cut -d '=' -f2)" ;;
     "--fail-warn")
       OPT_FAIL_WARN=1 ;;
     "--no-warn")
@@ -348,6 +352,11 @@ if [ $OPT_FAIL_WARN -eq 1 ] && [ $OPT_NO_WARN -eq 1 ]; then
 fi
 
 info    "Running mp-check with the options:"
+if [ -z "${OPT_CHECKPOINT}" ]; then
+  print   " $BOLD CHECKPOINT  = NONE"
+else
+  print   " $BOLD CHECKPOINT  = ${OPT_CHECKPOINT}"
+fi
 print   " $BOLD FAIL_WARN   = $(itoyn $OPT_FAIL_WARN)"
 print   " $BOLD NO_WARN     = $(itoyn $OPT_NO_WARN)"
 
@@ -359,12 +368,19 @@ for target in "${OPT_TARGET[@]}"; do
 done
 
 tc="${#OPT_TARGET[@]}"
+got_checkpoint=0
 ti=0
 
 for target in "${OPT_TARGET[@]}"; do
   unset_indent
   ti=$((ti + 1))
 
+  if [ -z "${OPT_CHECKPOINT}" ] || [ "${target}" == "${OPT_CHECKPOINT}" ]; then
+    got_checkpoint=1
+  fi
+
+  [ $got_checkpoint -eq 0 ] && continue
+
   if [ -f "${target}" ]; then
     info "(${ti}/${tc}) Checking the archive: ${target}"
     set_indent