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