neovim-flake/modules/languages/clang.nix

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{
pkgs,
config,
lib,
...
}:
with lib;
with builtins; let
cfg = config.vim.languages.clang;
defaultServer = "ccls";
servers = {
ccls = {
package = pkgs.ccls;
lspConfig = ''
lspconfig.ccls.setup{
capabilities = capabilities;
on_attach=default_on_attach;
cmd = {"${pkgs.ccls}/bin/ccls"};
${optionalString (cfg.lsp.opts != null) "init_options = ${cfg.lsp.cclsOpts}"}
}
'';
};
};
in {
options.vim.languages.clang = {
enable = mkEnableOption "C/C++ language support";
cHeader = mkOption {
description = ''
C syntax for headers. Can fix treesitter errors, see:
https://www.reddit.com/r/neovim/comments/orfpcd/question_does_the_c_parser_from_nvimtreesitter/
'';
type = types.bool;
default = false;
};
treesitter = {
enable = mkOption {
description = "Enable C/C++ treesitter";
type = types.bool;
default = config.vim.languages.enableTreesitter;
};
cPackage = mkOption {
description = "C treesitter grammar to use";
type = types.package;
default = pkgs.vimPlugins.nvim-treesitter.builtGrammars.c;
};
cppPackage = mkOption {
description = "C++ treesitter grammar to use";
type = types.package;
default = pkgs.vimPlugins.nvim-treesitter.builtGrammars.cpp;
};
};
lsp = {
enable = mkOption {
description = "Enable clang LSP support";
type = types.bool;
default = config.vim.languages.enableLSP;
};
server = mkOption {
description = "The clang LSP server to use";
type = with types; enum (attrNames servers);
default = defaultServer;
};
package = mkOption {
description = "clang LSP server package";
type = types.package;
default = servers.${cfg.lsp.server}.package;
};
opts = mkOption {
description = "Options to pass to clang LSP server";
type = with types; nullOr str;
default = null;
};
};
};
config = mkIf cfg.enable (mkMerge [
(mkIf cfg.cHeader {
vim.configRC.c-header = nvim.dag.entryAnywhere "let g:c_syntax_for_h = 1";
})
(mkIf cfg.treesitter.enable {
vim.treesitter.enable = true;
vim.treesitter.grammars = [cfg.treesitter.cPackage cfg.treesitter.cppPackage];
})
(mkIf cfg.lsp.enable {
vim.lsp.lspconfig.enable = true;
vim.lsp.lspconfig.sources.clang-lsp = servers.${cfg.lsp.server}.lspConfig;
})
]);
}