update: better version and empty root directory checking for mp-build and mp-check

mp-check/main.sh

@@ -174,6 +174,26 @@ check_archive(){
         fail_check
       fi
     fi
+
+    if [ "${k}" == "size" ]; then
+      if [ ! -z "${line_1}" ]; then
+        size="$(echo "${line_1}" | sed 's/size= //g')"
+        size="$(echo "${size}" | sed 's/size=//g')"
+      else
+        size="$(echo "${line_2}" | sed 's/size = //g')"
+        size="$(echo "${size}" | sed 's/size =//g')"
+      fi
+
+      if [ -z "${size}" ]; then
+        error "Failed to obtain package size information"
+        fail_check
+      fi
+
+      if [ "${size}" == "0" ]; then
+        error "Package size information is set as 0, is the package empty?"
+        fail_check
+      fi
+    fi
   done
 
   name="$(head -n1 "${tmpdir}/DATA" | sed 's/\[//g')"
@@ -184,6 +204,24 @@ check_archive(){
     fail_check
   fi
 
+  case "${name}" in
+    *_*)
+      error "Package name contains an invalid character: \"_\""
+      fail_check ;;
+    *" "*)
+      error "Package name contains an invalid character: \" \""
+      fail_check ;;
+  esac
+
+  case "${version}" in
+    *_*)
+      error "Package version contains an invalid character: \"_\""
+      fail_check ;;
+    *" "*)
+      error "Package version contains an invalid character: \" \""
+      fail_check ;;
+  esac
+
   filename="${name}_${version}.mpf"
 
   info "Checking HASHES file"
@@ -208,8 +246,15 @@ check_archive(){
   done < "${tmpdir}/HASHES"
 
   info "Checking files.tar.gz archive"
+  filec=0
 
   while read p; do
+    if [ -z "${p}" ]; then
+      continue
+    fi
+
+    filec=$((filec + 1))
+
     if [ "${p:0:1}" == "." ] || [ "${p:0:1}" == "/" ]; then
       error "Root file location is invalid (${p:0:1})"
       fail_check
@@ -231,6 +276,11 @@ check_archive(){
     fi
   done < <(tar tf "${tmpdir}/files.tar.gz")
 
+  if [ "${filec}" == "0" ]; then
+    error "Package file archive is empty (no files)"
+    fail_check
+  fi
+
   info "Checking INSTALL file"
 
   if [ -f "${tmpdir}/INSTALL" ] && ! grep -q . "${tmpdir}/INSTALL"; then