[EMAIL PROTECTED] said:
> Could someone please give me some little hints how to debug a lua
> script.
>
> (And sorry for the long mail - i wanted to give all infos)
>
> I have some experience with python, so when i don't get the result
> i expect, i use a "print" to see what's wrong.
I'm no lua expert, but here's what I use for lua debugging:
======= dbg.lua =======
dbg = {}
function dbg.echo(s)
dbg.echon(s)
dbg.echon('\n')
end
function dbg.echon(s)
io.stderr:write(dbg.tostring(s))
end
function dbg.tostring(obj)
local mt
local tname
local o
if type(obj) == 'userdata' then
mt = getmetatable(obj)
o = '['
if mt and mt.__index then
tname = mt.__index.__typename
if tname then
o = o .. tname
end
end
if obj.name then
if tname and tname == 'WClientWin' then
o = o .. ': ' .. dbg.tostring(obj:get_ident())
else
o = o .. ': ' .. obj:name()
end
end
return o .. ']'
elseif type(obj) == 'table' then
o = '{'
sep = ''
for k, v in pairs(obj)
do
o = o .. sep .. dbg.tostring(k) .. '='
o = o .. dbg.tostring(v)
sep = ', '
end
return o .. '}'
end
return tostring(obj)
end
======= dbg.lua =======
add this to your ~/.ion3. Then, in the code you want to debug:
dopath("dbg")
dbg.echo('this has a newline')
dbg.echon('this prints without a newline')
-- you can also make a best-effort attempt to print arbitrary objects:
dbg.echo(table)
I haven't used any of this in a while, but it made things much easier
for me. I see the output in ~/.xsession-errors (debian unstable).
Jason
