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feat(lsp): run handler in coroutine to support async response (#21026)

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To illustrate a use-case this also changes `window/showMessageRequest`
to use `vim.ui.select`
This commit is contained in:
Mathias Fußenegger
2022-11-19 10:48:49 +01:00
committed by GitHub
parent 0958dccc6d
commit af204dd0f1
3 changed files with 76 additions and 49 deletions
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72
runtime/lua/vim/lsp/rpc.lua
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@@ -391,44 +391,46 @@ function Client:handle_body(body)
-- Schedule here so that the users functions don't trigger an error and
-- we can still use the result.
schedule(function()
local status, result
status, result, err = self:try_call(
client_errors.SERVER_REQUEST_HANDLER_ERROR,
self.dispatchers.server_request,
decoded.method,
decoded.params
)
local _ = log.debug()
and log.debug(
'server_request: callback result',
{ status = status, result = result, err = err }
coroutine.wrap(function()
local status, result
status, result, err = self:try_call(
client_errors.SERVER_REQUEST_HANDLER_ERROR,
self.dispatchers.server_request,
decoded.method,
decoded.params
)
if status then
if result == nil and err == nil then
error(
string.format(
'method %q: either a result or an error must be sent to the server in response',
decoded.method
local _ = log.debug()
and log.debug(
'server_request: callback result',
{ status = status, result = result, err = err }
)
if status then
if result == nil and err == nil then
error(
string.format(
'method %q: either a result or an error must be sent to the server in response',
decoded.method
)
)
)
end
if err then
assert(
type(err) == 'table',
'err must be a table. Use rpc_response_error to help format errors.'
)
local code_name = assert(
protocol.ErrorCodes[err.code],
'Errors must use protocol.ErrorCodes. Use rpc_response_error to help format errors.'
)
err.message = err.message or code_name
end
else
-- On an exception, result will contain the error message.
err = rpc_response_error(protocol.ErrorCodes.InternalError, result)
result = nil
end
if err then
assert(
type(err) == 'table',
'err must be a table. Use rpc_response_error to help format errors.'
)
local code_name = assert(
protocol.ErrorCodes[err.code],
'Errors must use protocol.ErrorCodes. Use rpc_response_error to help format errors.'
)
err.message = err.message or code_name
end
else
-- On an exception, result will contain the error message.
err = rpc_response_error(protocol.ErrorCodes.InternalError, result)
result = nil
end
self:send_response(decoded.id, err, result)
self:send_response(decoded.id, err, result)
end)()
end)
-- This works because we are expecting vim.NIL here
elseif decoded.id and (decoded.result ~= vim.NIL or decoded.error ~= vim.NIL) then