correct return value if vivado fails

vivado-wrapper

@@ -3,7 +3,7 @@
 _vw_bin_name="$0"
 
 _vw_version_major="1"
-_vw_version_minor="2"
+_vw_version_minor="3"
 _vw_version="${_vw_version_major}.${_vw_version_minor}"
 
 [[ $_vw_version_major == 0 ]] && echo "Vivado wrapper is unfinished, and unable to work." && exit 11
@@ -132,7 +132,7 @@ function vivado_check_and_init_template () {
     [[ -z "$board" ]] && echo "You must set variable 'board'. Try \`vivadow init\` again." && return 4
     [[ -d "$my_path/template/$board" ]] && return 0
     "$my_path/gen_tcl.sh" init-project temp_project "$my_path/template/$board" "$board" > $temp_dir/sh.tcl
-    "$vivado_exec" -mode batch -source "$temp_dir/sh.tcl" -nojournal -nolog
+    "$vivado_exec" -mode batch -source "$temp_dir/sh.tcl" -nojournal -nolog || return $?
     rm "$my_path/template/$board/temp_project.srcs/constrs_1/new/constraint.xdc"
     rm -rf "$my_path/template/$board/temp_project.cache/"*
 }
@@ -180,12 +180,15 @@ function do_init () {
 
 function do_build () {
     generate_real_project
-    [[ $? -ne 0 ]] && echo "Generate real project failed." && clean_real_project && exit 4
+    [[ $? -ne 0 ]] && echo "Generate real project failed." && clean_real_project && return 4
 
     "$my_path/gen_tcl.sh" build "$temp_dir/project/temp_project.xpr" synth_1 impl_1 write_bitstream "$top_module" $thread_num > $temp_dir/sh.tcl
     "$vivado_exec" -mode batch -source "$temp_dir/sh.tcl" -nojournal -nolog
+    _ret=$?
+    [[ $_ret -ne 0 ]] && echo2 "vivado-wrapper: Error: Build failed. Please check previous error report." && clean_real_project && return $_ret
     _bit_file="$temp_dir/project/temp_project.runs/impl_1/$top_module.bit"
-    [[ -e "$_bit_file" ]] && cp "$_bit_file" "$bit_dir/$top_module.bit" || echo "vivado-wrapper: Error: Build failed. Please check previous error report."
+    [[ -e "$_bit_file" ]] && cp "$_bit_file" "$bit_dir/$top_module.bit"
+    [[ $? -ne 0 ]] && echo2 "vivado-wrapper: Error: Build failed. Please check previous error report." && clean_real_project && return 5
 
     clean_real_project
 }
@@ -194,6 +197,7 @@ function burn_file () {
     file_to_burn="$1"
     "$my_path/gen_tcl.sh" burn-file "$file_to_burn" "$device_name" > $temp_dir/sh.tcl
     "$vivado_exec" -mode batch -source "$temp_dir/sh.tcl" -nojournal -nolog
+    return $?
 }
 
 function do_burn () {
@@ -245,3 +249,4 @@ case $vw_cmd in
         ;;
 esac
 
+exit $?