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util.error: Allow optional tracebacks to be injected on errors

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This allows extra debug info to be provided for development purposes.
This commit is contained in:
Matthew Wild 2020-08-28 12:40:59 +01:00
parent c340e3ab37
commit 7507996371
2 changed files with 21 additions and 0 deletions
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15
util/error.lua
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@ -8,6 +8,14 @@ local function is_err(e)
return getmetatable(e) == error_mt;
end
local auto_inject_traceback = false;
local function configure(opt)
if opt.auto_inject_traceback ~= nil then
auto_inject_traceback = opt.auto_inject_traceback;
end
end
-- Do we want any more well-known fields?
-- Or could we just copy all fields from `e`?
-- Sometimes you want variable details in the `text`, how to handle that?
@ -17,6 +25,12 @@ end
local function new(e, context, registry)
local template = (registry and registry[e]) or e or {};
context = context or template.context or { _error_id = e };
if auto_inject_traceback then
context.traceback = debug.traceback("error stack", 2);
end
return setmetatable({
type = template.type or "cancel";
condition = template.condition or "undefined-condition";
@ -57,4 +71,5 @@ return {
coerce = coerce;
is_err = is_err;
from_stanza = from_stanza;
configure = configure;
}