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|
{ runCommand, cargo, neovim, rust-analyzer, rustc }:
runCommand "test-neovim-rust-analyzer" {
nativeBuildInputs = [ cargo neovim rust-analyzer rustc ];
testRustSrc = /* rust */ ''
fn main() {
let mut var = vec![None];
var.push(Some("hello".to_owned()));
}
'';
# NB. Wait for server done type calculations before sending `hover` request,
# otherwise it would return `{unknown}`.
# Ref: https://github.com/rust-lang/rust-analyzer/blob/7b11fdeb681c12002861b9804a388efde81c9647/docs/dev/lsp-extensions.md#server-status
nvimConfig = /* lua */ ''
local caps = vim.lsp.protocol.make_client_capabilities()
caps["experimental"] = { serverStatusNotification = true }
vim.lsp.buf_attach_client(vim.api.nvim_get_current_buf(), vim.lsp.start_client({
cmd = { "rust-analyzer" },
capabilities = caps,
handlers = {
["experimental/serverStatus"] = function(_, msg, ctx)
if msg.health == "ok" then
if msg.quiescent then
vim.cmd("goto 23") -- let mut |var =...
vim.lsp.buf.hover()
end
else
print("error: server status is not ok: ")
vim.cmd("q")
end
end,
["textDocument/hover"] = function(_, msg, ctx)
if msg then
-- Keep newlines.
io.write(msg.contents.value)
vim.cmd("q")
end
end,
},
on_error = function(code)
print("error: " .. code)
vim.cmd("q")
end
}))
'';
} ''
# neovim requires a writable HOME.
export HOME="$(pwd)"
cargo new --bin test-rust-analyzer
cd test-rust-analyzer
cat <<<"$testRustSrc" >src/main.rs
cat <<<"$nvimConfig" >script.lua
# `-u` doesn't work
result="$(nvim --headless +'lua dofile("script.lua")' src/main.rs)"
echo "$result"
[[ "$result" == *"var: Vec<Option<String>>"* ]]
touch $out
''
|
