Debugging Java code with nvim-jdtls and nvim-dap

[britter]

Hi,

I'm trying to set up nvim as an IDE replacement for Java development. I'm using the nvim-jdtls plugin to configure pkgs.jdt-language-server and am struggling to get the integration between nvim-jdtls and nvim-dap working.

nvim-dap's documentation states:

You do not have to define dap.adapters.java yourself.

However, when I try to debug an application by calling :DapContinue the status line says

No configuration found for java. You need to add configs to dap.configurations.java (See :h dap-configuration)

My configuration looks like this:

# java.nix { lib, pkgs, ... }: let singleFile = dir: let files = builtins.attrNames (builtins.readDir dir); in if builtins.length files == 1 then "${dir}/${(builtins.elemAt files 0)}" else throw "Directory ${dir} does not contain exactly one file."; in { programs.nixvim.plugins.nvim-jdtls = { enable = true; cmd = [ (lib.getExe pkgs.jdt-language-server) ]; initOptions = { bundles = [(singleFile "${pkgs.vscode-extensions.vscjava.vscode-java-debug}/share/vscode/extensions/vscjava.vscode-java-debug/server")]; }; }; }

# debug.nix _: { programs.nixvim = { plugins.dap = { enable = true; extensions.dap-ui.enable = true; }; keymaps = [ { action.__raw = "require('dap').toggle_breakpoint"; key = "<leader>dt"; mode = ["n"]; } { action.__raw = "require('dap').continue"; key = "<leader>dc"; mode = ["n"]; } { action.__raw = "require('dap').step_over"; key = "<leader>ds"; mode = ["n"]; } { action.__raw = "require('dap').step_into"; key = "<leader>di"; mode = ["n"]; } ]; }; }

And then another file that include the two and some other configurations.

[573]

@britter, you might need a dap.configurations.java attribute section somewhere, look at recent typical example for how that is done.
(also plugins.dap.configurations and that test (via))