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";
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packageToCmd = package: defaultCmd:
if isList cfg.lsp.package
then nvim.lua.expToLua cfg.lsp.package
else ''{ "${cfg.lsp.package}/bin/${defaultCmd}" }'';
servers = {
ccls = {
package = pkgs.ccls;
lspConfig = ''
lspconfig.ccls.setup{
capabilities = capabilities;
on_attach=default_on_attach;
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cmd = ${packageToCmd cfg.lsp.package "ccls"};
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${optionalString (cfg.lsp.opts != null) "init_options = ${cfg.lsp.opts}"}
}
'';
};
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clangd = {
package = pkgs.clang-tools;
lspConfig = ''
local clangd_cap = capabilities
-- use same offsetEncoding as null-ls
clangd_cap.offsetEncoding = {"utf-16"}
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lspconfig.clangd.setup{
capabilities = clangd_cap;
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on_attach=default_on_attach;
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cmd = ${packageToCmd cfg.lsp.package "clangd"};
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${optionalString (cfg.lsp.opts != null) "init_options = ${cfg.lsp.opts}"}
}
'';
};
};
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defaultDebugger = "lldb-vscode";
debuggers = {
lldb-vscode = {
package = pkgs.lldb;
dapConfig = ''
dap.adapters.lldb = {
type = 'executable',
command = '${cfg.dap.package}/bin/lldb-vscode',
name = 'lldb'
}
dap.configurations.cpp = {
{
name = 'Launch',
type = 'lldb',
request = 'launch',
program = function()
return vim.fn.input('Path to executable: ', vim.fn.getcwd() .. '/', 'file')
end,
cwd = "''${workspaceFolder}",
stopOnEntry = false,
args = {},
},
}
dap.configurations.c = dap.configurations.cpp
'';
};
};
in {
options.vim.languages.clang = {
enable = mkEnableOption "C/C++ language support";
cHeader = mkOption {
description = ''
C syntax for headers. Can fix treesitter errors, see:
https://www.reddit.com/r/neovim/comments/orfpcd/question_does_the_c_parser_from_nvimtreesitter/
'';
type = types.bool;
default = false;
};
treesitter = {
enable = mkEnableOption "C/C++ treesitter" // {default = config.vim.languages.enableTreesitter;};
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cPackage = nvim.types.mkGrammarOption pkgs "c";
cppPackage = nvim.types.mkGrammarOption pkgs "cpp";
};
lsp = {
enable = mkEnableOption "Enable clang LSP support" // {default = config.vim.languages.enableLSP;};
server = mkOption {
description = "The clang LSP server to use";
type = with types; enum (attrNames servers);
default = defaultServer;
};
package = mkOption {
description = "clang LSP server package";
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type = with types; either package (listOf str);
default = servers.${cfg.lsp.server}.package;
};
opts = mkOption {
description = "Options to pass to clang LSP server";
type = with types; nullOr str;
default = null;
};
};
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dap = {
enable = mkOption {
description = "Enable clang Debug Adapter";
type = types.bool;
default = config.vim.languages.enableDAP;
};
debugger = mkOption {
description = "clang debugger to use";
type = with types; enum (attrNames debuggers);
default = defaultDebugger;
};
package = mkOption {
description = "clang debugger package.";
type = types.package;
default = debuggers.${cfg.dap.debugger}.package;
};
};
};
config = mkIf cfg.enable (mkMerge [
(mkIf cfg.cHeader {
vim.configRC.c-header = nvim.dag.entryAnywhere "let g:c_syntax_for_h = 1";
})
(mkIf cfg.treesitter.enable {
vim.treesitter.enable = true;
vim.treesitter.grammars = [cfg.treesitter.cPackage cfg.treesitter.cppPackage];
})
(mkIf cfg.lsp.enable {
vim.lsp.lspconfig.enable = true;
vim.lsp.lspconfig.sources.clang-lsp = servers.${cfg.lsp.server}.lspConfig;
})
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(mkIf cfg.dap.enable {
vim.debugger.nvim-dap.enable = true;
vim.debugger.nvim-dap.sources.clang-debugger = debuggers.${cfg.dap.debugger}.dapConfig;
})
]);
}