pass = true;
pwd = true;
};
+local optimal_line_length = 65;
-local function get_locals_table(level)
+local termcolours = require "util.termcolours";
+local getstring = termcolours.getstring;
+local styles;
+do
+ _ = termcolours.getstyle;
+ styles = {
+ boundary_padding = _("bright");
+ filename = _("bright", "blue");
+ level_num = _("green");
+ funcname = _("yellow");
+ location = _("yellow");
+ };
+end
+module("debugx", package.seeall);
+
+function get_locals_table(thread, level)
local locals = {};
for local_num = 1, math.huge do
- local name, value = debug.getlocal(level, local_num);
+ local name, value;
+ if thread then
+ name, value = debug.getlocal(thread, level, local_num);
+ else
+ name, value = debug.getlocal(level+1, local_num);
+ end
if not name then break; end
table.insert(locals, { name = name, value = value });
end
return locals;
end
-local function get_upvalues_table(func)
+function get_upvalues_table(func)
local upvalues = {};
- for upvalue_num = 1, math.huge do
- local name, value = debug.getupvalue(func, upvalue_num);
- if not name then break; end
- table.insert(upvalues, { name = name, value = value });
+ if func then
+ for upvalue_num = 1, math.huge do
+ local name, value = debug.getupvalue(func, upvalue_num);
+ if not name then break; end
+ table.insert(upvalues, { name = name, value = value });
+ end
end
return upvalues;
end
-local function string_from_var_table(var_table, max_line_len, indent_str)
+function string_from_var_table(var_table, max_line_len, indent_str)
local var_string = {};
local col_pos = 0;
max_line_len = max_line_len or math.huge;
if thread then
info = debug.getinfo(thread, level);
else
- info = debug.getinfo(level);
+ info = debug.getinfo(level+1);
end
if not info then break; end
-
+
levels[(level-start_level)+1] = {
level = level;
info = info;
- locals = get_locals_table(level);
+ locals = get_locals_table(thread, level+(thread and 0 or 1));
upvalues = get_upvalues_table(info.func);
};
- end
+ end
return levels;
end
-function debug.traceback(thread, message, level)
- if type(thread) ~= "thread" then
- thread, message, level = coroutine.running(), thread, message;
+function traceback(...)
+ local ok, ret = pcall(_traceback, ...);
+ if not ok then
+ return "Error in error handling: "..ret;
end
- if level and type(message) ~= "string" then
- return nil, "invalid message";
- elseif not level then
- level = message or 2;
+ return ret;
+end
+
+local function build_source_boundary_marker(last_source_desc)
+ local padding = string.rep("-", math.floor(((optimal_line_length - 6) - #last_source_desc)/2));
+ return getstring(styles.boundary_padding, "v"..padding).." "..getstring(styles.filename, last_source_desc).." "..getstring(styles.boundary_padding, padding..(#last_source_desc%2==0 and "-v" or "v "));
+end
+
+function _traceback(thread, message, level)
+
+ -- Lua manual says: debug.traceback ([thread,] [message [, level]])
+ -- I fathom this to mean one of:
+ -- ()
+ -- (thread)
+ -- (message, level)
+ -- (thread, message, level)
+
+ if thread == nil then -- Defaults
+ thread, message, level = coroutine.running(), message, level;
+ elseif type(thread) == "string" then
+ thread, message, level = coroutine.running(), thread, message;
+ elseif type(thread) ~= "thread" then
+ return nil; -- debug.traceback() does this
end
-
+
+ level = level or 0;
+
message = message and (message.."\n") or "";
-
- local levels = get_traceback_table(thread, level+2);
-
+
+ -- +3 counts for this function, and the pcall() and wrapper above us, the +1... I don't know.
+ local levels = get_traceback_table(thread, level+(thread == nil and 4 or 0));
+
+ local last_source_desc;
+
local lines = {};
for nlevel, level in ipairs(levels) do
local info = level.info;
local line = "...";
local func_type = info.namewhat.." ";
+ local source_desc = (info.short_src == "[C]" and "C code") or info.short_src or "Unknown";
if func_type == " " then func_type = ""; end;
if info.short_src == "[C]" then
- line = "[ C ] "..func_type.."C function "..(info.name and ("%q"):format(info.name) or "(unknown name)")
+ line = "[ C ] "..func_type.."C function "..getstring(styles.location, (info.name and ("%q"):format(info.name) or "(unknown name)"));
elseif info.what == "main" then
- line = "[Lua] "..info.short_src.." line "..info.currentline;
+ line = "[Lua] "..getstring(styles.location, info.short_src.." line "..info.currentline);
else
local name = info.name or " ";
if name ~= " " then
if func_type == "global " or func_type == "local " then
func_type = func_type.."function ";
end
- line = "[Lua] "..info.short_src.." line "..info.currentline.." in "..func_type..name.." defined on line "..info.linedefined;
+ line = "[Lua] "..getstring(styles.location, info.short_src.." line "..info.currentline).." in "..func_type..getstring(styles.funcname, name).." (defined on line "..info.linedefined..")";
+ end
+ if source_desc ~= last_source_desc then -- Venturing into a new source, add marker for previous
+ last_source_desc = source_desc;
+ table.insert(lines, "\t "..build_source_boundary_marker(last_source_desc));
end
nlevel = nlevel-1;
- table.insert(lines, "\t"..(nlevel==0 and ">" or " ").."("..nlevel..") "..line);
+ table.insert(lines, "\t"..(nlevel==0 and ">" or " ")..getstring(styles.level_num, "("..nlevel..") ")..line);
local npadding = (" "):rep(#tostring(nlevel));
- local locals_str = string_from_var_table(level.locals, 65, "\t "..npadding);
- if locals_str then
- table.insert(lines, "\t "..npadding.."Locals: "..locals_str);
+ if level.locals then
+ local locals_str = string_from_var_table(level.locals, optimal_line_length, "\t "..npadding);
+ if locals_str then
+ table.insert(lines, "\t "..npadding.."Locals: "..locals_str);
+ end
end
- local upvalues_str = string_from_var_table(level.upvalues, 65, "\t "..npadding);
+ local upvalues_str = string_from_var_table(level.upvalues, optimal_line_length, "\t "..npadding);
if upvalues_str then
table.insert(lines, "\t "..npadding.."Upvals: "..upvalues_str);
end
end
+
+-- table.insert(lines, "\t "..build_source_boundary_marker(last_source_desc));
+
return message.."stack traceback:\n"..table.concat(lines, "\n");
end
+
+function use()
+ debug.traceback = traceback;
+end
+
+return _M;
projects / prosody.git / blobdiff