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local debug_getinfo = debug.getinfo
local Files = require("files")
local C = require("colors")
local pretty_error = require("pretty_errors")
local ok, to_lua = pcall(function()
return require('moonscript.base').to_lua
end)
if not ok then
to_lua = function()
return nil
end
end
local MOON_SOURCE_MAP = setmetatable({ }, {
__index = function(self, file)
local _, line_table = to_lua(file)
self[file] = line_table or false
return line_table or false
end
})
debug.getinfo = function(thread, f, what)
if what == nil then
f, what, thread = thread, f, nil
end
if type(f) == 'number' then
f = f + 1
end
local info
if thread == nil then
info = debug_getinfo(f, what)
else
info = debug_getinfo(thread, f, what)
end
if not info or not info.func then
return info
end
if info.short_src or info.source or info.linedefine or info.currentline then
do
local map = SOURCE_MAP[info.source]
if map then
if info.currentline then
info.currentline = assert(map[info.currentline])
end
if info.linedefined then
info.linedefined = assert(map[info.linedefined])
end
if info.lastlinedefined then
info.lastlinedefined = assert(map[info.lastlinedefined])
end
info.short_src = info.source:match('@([^[]*)') or info.short_src
if info.name then
info.name = "action '" .. tostring(info.name:from_lua_id()) .. "'"
else
info.name = "main chunk"
end
end
end
end
return info
end
local enhance_error
enhance_error = function(error_message, start_fn, stop_fn)
if not (error_message and error_message:match("%d|")) then
error_message = error_message or ""
do
local fn = (error_message:match("attempt to call a nil value %(global '(.*)'%)") or error_message:match("attempt to call global '(.*)' %(a nil value%)"))
if fn then
error_message = "The action '" .. tostring(fn:from_lua_id()) .. "' is not defined."
end
end
local level = 2
while true do
local calling_fn = debug_getinfo(level)
if not calling_fn then
break
end
level = level + 1
local filename, file, line_num
do
local map = SOURCE_MAP and SOURCE_MAP[calling_fn.source]
if map then
if calling_fn.currentline then
line_num = assert(map[calling_fn.currentline])
end
local start, stop
filename, start, stop = calling_fn.source:match('@([^[]*)%[([0-9]+):([0-9]+)]')
if not filename then
filename, start = calling_fn.source:match('@([^[]*)%[([0-9]+)]')
end
assert(filename)
file = Files.read(filename)
else
filename = calling_fn.short_src
file = Files.read(filename)
if calling_fn.short_src:match("%.moon$") and type(MOON_SOURCE_MAP[file]) == 'table' then
local char = MOON_SOURCE_MAP[file][calling_fn.currentline]
line_num = file:line_number_at(char)
else
line_num = calling_fn.currentline
end
end
end
if file and filename and line_num then
local start = 1
local lines = file:lines()
for i = 1, line_num - 1 do
start = start + #lines[i] + 1
end
local stop = start + #lines[line_num]
start = start + #lines[line_num]:match("^ *")
error_message = pretty_error({
title = "Error",
error = error_message,
source = file,
start = start,
stop = stop,
filename = filename
})
break
end
if calling_fn.func == xpcall then
break
end
end
end
local ret = {
C('bold red', error_message or "Error"),
"stack traceback:"
}
local level = 2
while true do
local _continue_0 = false
repeat
local calling_fn = debug_getinfo(level)
if not calling_fn then
break
end
if calling_fn.func == xpcall then
break
end
level = level + 1
local name = calling_fn.name and "function '" .. tostring(calling_fn.name) .. "'" or nil
if calling_fn.linedefined == 0 then
name = "main chunk"
end
if name == "function 'run_lua_fn'" then
_continue_0 = true
break
end
local line = nil
do
local map = SOURCE_MAP and SOURCE_MAP[calling_fn.source]
if map then
if calling_fn.currentline then
calling_fn.currentline = assert(map[calling_fn.currentline])
end
if calling_fn.linedefined then
calling_fn.linedefined = assert(map[calling_fn.linedefined])
end
if calling_fn.lastlinedefined then
calling_fn.lastlinedefined = assert(map[calling_fn.lastlinedefined])
end
local filename, start, stop = calling_fn.source:match('@([^[]*)%[([0-9]+):([0-9]+)]')
if not filename then
filename, start = calling_fn.source:match('@([^[]*)%[([0-9]+)]')
end
assert(filename)
if calling_fn.name then
name = "action '" .. tostring(calling_fn.name:from_lua_id()) .. "'"
else
name = "main chunk"
end
local file = Files.read(filename)
local lines = file and file:lines() or { }
do
local err_line = lines[calling_fn.currentline]
if err_line then
local offending_statement = C('bright red', err_line:match("^[ ]*(.*)"))
line = C('yellow', tostring(filename) .. ":" .. tostring(calling_fn.currentline) .. " in " .. tostring(name) .. "\n " .. tostring(offending_statement))
else
line = C('yellow', tostring(filename) .. ":" .. tostring(calling_fn.currentline) .. " in " .. tostring(name))
end
end
else
local line_num
if name == nil then
local search_level = level
local _info = debug.getinfo(search_level)
while true do
search_level = search_level + 1
_info = debug.getinfo(search_level)
if not (_info) then
break
end
for i = 1, 999 do
local varname, val = debug.getlocal(search_level, i)
if not varname then
break
end
if val == calling_fn.func then
name = "local '" .. tostring(varname) .. "'"
if not varname:match("%(") then
break
end
end
end
if not (name) then
for i = 1, _info.nups do
local varname, val = debug.getupvalue(_info.func, i)
if not varname then
break
end
if val == calling_fn.func then
name = "upvalue '" .. tostring(varname) .. "'"
if not varname:match("%(") then
break
end
end
end
end
end
end
local file, lines
do
file = Files.read(calling_fn.short_src)
if file then
lines = file:lines()
end
end
if file and (calling_fn.short_src:match("%.moon$") or file:match("^#![^\n]*moon\n")) and type(MOON_SOURCE_MAP[file]) == 'table' then
local char = MOON_SOURCE_MAP[file][calling_fn.currentline]
line_num = file:line_number_at(char)
line = C('cyan', tostring(calling_fn.short_src) .. ":" .. tostring(line_num) .. " in " .. tostring(name or '?'))
else
line_num = calling_fn.currentline
if calling_fn.short_src == '[C]' then
line = C('green', tostring(calling_fn.short_src) .. " in " .. tostring(name or '?'))
else
line = C('blue', tostring(calling_fn.short_src) .. ":" .. tostring(calling_fn.currentline) .. " in " .. tostring(name or '?'))
end
end
if file then
do
local err_line = lines[line_num]
if err_line then
local offending_statement = C('bright red', tostring(err_line:match("^[ ]*(.*)$")))
line = line .. ("\n " .. offending_statement)
end
end
end
end
end
table.insert(ret, line)
if calling_fn.istailcall then
table.insert(ret, C('dim', " (...tail calls...)"))
end
_continue_0 = true
until true
if not _continue_0 then
break
end
end
return table.concat(ret, "\n")
end
local guard
guard = function(fn)
local err
ok, err = xpcall(fn, enhance_error)
if not ok then
io.stderr:write(err)
io.stderr:flush()
return os.exit(1)
end
end
return {
guard = guard,
enhance_error = enhance_error,
print_error = print_error
}
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