Bruce Hill
bc41cc3a24
running files leaking when errors occurred (causing spurious circular import errors), and improved tutorial.
279 lines
8.9 KiB
Lua
279 lines
8.9 KiB
Lua
local debug_getinfo = debug.getinfo
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local Files = require("files")
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local C = require("colors")
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local pretty_error = require("pretty_errors")
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local ok, to_lua = pcall(function()
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return require('moonscript.base').to_lua
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end)
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if not ok then
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to_lua = function()
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return nil
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end
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end
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local MOON_SOURCE_MAP = setmetatable({ }, {
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__index = function(self, file)
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local _, line_table = to_lua(file)
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self[file] = line_table or false
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return line_table or false
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end
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})
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debug.getinfo = function(thread, f, what)
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if what == nil then
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f, what, thread = thread, f, nil
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end
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if type(f) == 'number' then
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f = f + 1
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end
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local info
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if thread == nil then
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info = debug_getinfo(f, what)
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else
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info = debug_getinfo(thread, f, what)
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end
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if not info or not info.func then
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return info
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end
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if info.short_src or info.source or info.linedefine or info.currentline then
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do
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local map = SOURCE_MAP[info.source]
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if map then
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if info.currentline then
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info.currentline = assert(map[info.currentline])
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end
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if info.linedefined then
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info.linedefined = assert(map[info.linedefined])
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end
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if info.lastlinedefined then
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info.lastlinedefined = assert(map[info.lastlinedefined])
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end
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info.short_src = info.source:match('@([^[]*)') or info.short_src
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if info.name then
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info.name = "action '" .. tostring(info.name:from_lua_id()) .. "'"
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else
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info.name = "main chunk"
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end
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end
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end
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end
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return info
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end
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local enhance_error
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enhance_error = function(error_message, start_fn, stop_fn)
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if not (error_message and error_message:match("%d|")) then
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error_message = error_message or ""
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do
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local fn = (error_message:match("attempt to call a nil value %(global '(.*)'%)") or error_message:match("attempt to call global '(.*)' %(a nil value%)"))
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if fn then
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error_message = "The action '" .. tostring(fn:from_lua_id()) .. "' is not defined."
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end
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end
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local level = 2
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while true do
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local calling_fn = debug_getinfo(level)
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if not calling_fn then
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break
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end
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level = level + 1
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local filename, file, line_num
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do
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local map = SOURCE_MAP and SOURCE_MAP[calling_fn.source]
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if map then
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if calling_fn.currentline then
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line_num = assert(map[calling_fn.currentline])
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end
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local start, stop
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filename, start, stop = calling_fn.source:match('@([^[]*)%[([0-9]+):([0-9]+)]')
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if not filename then
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filename, start = calling_fn.source:match('@([^[]*)%[([0-9]+)]')
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end
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assert(filename)
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file = Files.read(filename)
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else
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filename = calling_fn.short_src
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file = Files.read(filename)
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if calling_fn.short_src:match("%.moon$") and type(MOON_SOURCE_MAP[file]) == 'table' then
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local char = MOON_SOURCE_MAP[file][calling_fn.currentline]
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line_num = file:line_number_at(char)
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else
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line_num = calling_fn.currentline
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end
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end
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end
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if file and filename and line_num then
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local start = 1
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local lines = file:lines()
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for i = 1, line_num - 1 do
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start = start + #lines[i] + 1
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end
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local stop = start + #lines[line_num]
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start = start + #lines[line_num]:match("^ *")
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error_message = pretty_error({
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title = "Error",
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error = error_message,
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source = file,
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start = start,
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stop = stop,
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filename = filename
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})
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break
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end
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if calling_fn.func == xpcall then
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break
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end
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end
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end
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local ret = {
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C('bold red', error_message or "Error"),
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"stack traceback:"
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}
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local level = 2
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while true do
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local _continue_0 = false
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repeat
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local calling_fn = debug_getinfo(level)
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if not calling_fn then
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break
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end
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if calling_fn.func == xpcall then
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break
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end
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level = level + 1
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local name = calling_fn.name and "function '" .. tostring(calling_fn.name) .. "'" or nil
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if calling_fn.linedefined == 0 then
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name = "main chunk"
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end
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if name == "function 'run_lua_fn'" then
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_continue_0 = true
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break
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end
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local line = nil
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do
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local map = SOURCE_MAP and SOURCE_MAP[calling_fn.source]
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if map then
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if calling_fn.currentline then
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calling_fn.currentline = assert(map[calling_fn.currentline])
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end
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if calling_fn.linedefined then
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calling_fn.linedefined = assert(map[calling_fn.linedefined])
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end
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if calling_fn.lastlinedefined then
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calling_fn.lastlinedefined = assert(map[calling_fn.lastlinedefined])
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end
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local filename, start, stop = calling_fn.source:match('@([^[]*)%[([0-9]+):([0-9]+)]')
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if not filename then
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filename, start = calling_fn.source:match('@([^[]*)%[([0-9]+)]')
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end
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assert(filename)
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if calling_fn.name then
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name = "action '" .. tostring(calling_fn.name:from_lua_id()) .. "'"
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else
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name = "main chunk"
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end
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local file = Files.read(filename)
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local lines = file and file:lines() or { }
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do
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local err_line = lines[calling_fn.currentline]
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if err_line then
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local offending_statement = C('bright red', err_line:match("^[ ]*(.*)"))
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line = C('yellow', tostring(filename) .. ":" .. tostring(calling_fn.currentline) .. " in " .. tostring(name) .. "\n " .. tostring(offending_statement))
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else
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line = C('yellow', tostring(filename) .. ":" .. tostring(calling_fn.currentline) .. " in " .. tostring(name))
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end
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end
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else
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local line_num
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if name == nil then
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local search_level = level
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local _info = debug.getinfo(search_level)
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while true do
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search_level = search_level + 1
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_info = debug.getinfo(search_level)
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if not (_info) then
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break
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end
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for i = 1, 999 do
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local varname, val = debug.getlocal(search_level, i)
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if not varname then
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break
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end
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if val == calling_fn.func then
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name = "local '" .. tostring(varname) .. "'"
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if not varname:match("%(") then
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break
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end
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end
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end
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if not (name) then
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for i = 1, _info.nups do
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local varname, val = debug.getupvalue(_info.func, i)
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if not varname then
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break
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end
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if val == calling_fn.func then
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name = "upvalue '" .. tostring(varname) .. "'"
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if not varname:match("%(") then
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break
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end
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end
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end
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end
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end
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end
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local file, lines
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do
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file = Files.read(calling_fn.short_src)
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if file then
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lines = file:lines()
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end
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end
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if file and (calling_fn.short_src:match("%.moon$") or file:match("^#![^\n]*moon\n")) and type(MOON_SOURCE_MAP[file]) == 'table' then
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local char = MOON_SOURCE_MAP[file][calling_fn.currentline]
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line_num = file:line_number_at(char)
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line = C('cyan', tostring(calling_fn.short_src) .. ":" .. tostring(line_num) .. " in " .. tostring(name or '?'))
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else
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line_num = calling_fn.currentline
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if calling_fn.short_src == '[C]' then
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line = C('green', tostring(calling_fn.short_src) .. " in " .. tostring(name or '?'))
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else
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line = C('blue', tostring(calling_fn.short_src) .. ":" .. tostring(calling_fn.currentline) .. " in " .. tostring(name or '?'))
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end
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end
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if file then
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do
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local err_line = lines[line_num]
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if err_line then
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local offending_statement = C('bright red', tostring(err_line:match("^[ ]*(.*)$")))
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line = line .. ("\n " .. offending_statement)
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end
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end
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end
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end
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end
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table.insert(ret, line)
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if calling_fn.istailcall then
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table.insert(ret, C('dim', " (...tail calls...)"))
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end
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_continue_0 = true
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until true
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if not _continue_0 then
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break
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end
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end
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return table.concat(ret, "\n")
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end
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local guard
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guard = function(fn)
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local err
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ok, err = xpcall(fn, enhance_error)
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if not ok then
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io.stderr:write(err)
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io.stderr:flush()
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return os.exit(1)
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end
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end
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return {
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guard = guard,
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enhance_error = enhance_error,
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print_error = print_error
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}
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