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path: root/.vim/lua/debugger.lua
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-- vim: fdm=marker

require('telescope').load_extension('dap')

local dap = require('dap')
dap.defaults.fallback.terminal_win_cmd = 'belowright 10new'
dap.defaults.fallback.terminal_win_cmd = 'belowright 10new'

-- open repl when session starts
dap.listeners.after['event_initialized']['me'] = function()
  dap.repl.toggle()
end

-- signs
vim.fn.sign_define({{name='DapBreakpoint', text='🞱', texthl='DapBreakpoint', linehl='DapBreakpointLn'}})
vim.fn.sign_define({{name='DapStopped', text='→', texthl='DapStopped', linehl='DapStoppedLn'}})

-- keymaps
vim.keymap.set('n', '<leader>dd', dap.toggle_breakpoint) -- convenience
vim.keymap.set('n', '<leader>db', dap.toggle_breakpoint)
vim.keymap.set('n', '<leader>dc', dap.continue)
vim.keymap.set('n', '<leader>do', dap.step_over)
vim.keymap.set('n', '<leader>di', dap.step_into)
vim.keymap.set('n', '<leader>dO', dap.step_out)
vim.keymap.set('n', '<leader>dR', dap.repl.toggle)
vim.keymap.set('n', '<leader>dL', dap.run_last)
vim.keymap.set('n', '<leader>dt', dap.terminate)

local widgets = require('dap.ui.widgets')
vim.keymap.set('n', '<leader>dh', widgets.hover)
vim.keymap.set('n', '<leader>dB', require('telescope').extensions.dap.list_breakpoints)

wk_register {
  ['<leader>d'] = {
    name = '+Dap',
    d = {'toggle_breakpoint'},
    b = {'toggle_breakpoint'},
    c = {'continue'},
    o = {'step_over'},
    i = {'step_into'},
    O = {'step_out'},
    R = {'repl'},
    L = {'run_last'},
    t = {'terminate'},
    h = {'hover'},
    B = {'list_breakpoints'}
  }
}

-- Common
local bin_from_var_or_pick = function()
  local ok, retval = pcall(vim.api.nvim_buf_get_var, 0, 'dap_bin')
  if ok then return retval end
  local bin = nil
  vim.ui.input({prompt = 'DAP Binary: '}, function(choice) bin = choice end)
  return bin
end

-- Go {{{
dap.adapters.go_dlv_local = function(callback, config) -- {{{
  local stdout = vim.loop.new_pipe()
  local handle
  local pid_or_err
  local port = 38697
  local opts = {
    stdio = {nil, stdout},
    args = {'dap', '-l', '127.0.0.1:' .. port},
    detached = true,
  }
  handle, pid_or_err = vim.loop.spawn("dlv", opts, function(exit)
    stdout:close()
    handle:close()
    if exit ~= 0 then vim.notify('dlv exited with exit code ' .. exit) end
  end)
  assert(handle, 'Error running dlv: ' .. tostring(pid_or_err))
  stdout:read_start(function(err, chunk)
    assert(not err, err)
    if chunk then vim.schedule(function() require('dap.repl').append(chunk) end) end
  end)
  vim.defer_fn(function() callback({type = 'server', host = '127.0.0.1', port = port}) end, 100)
end -- }}}

dap.adapters.go_dlv_remote = {
  type = 'server',
  host = '127.0.0.1',
  port = 38697,
}

dap.configurations.go = {
  {
    name = 'Debug (local)',
    type = 'go_dlv_local',
    request = 'launch',
    program = '${file}',
  },
  {
    name = 'Debug (remote)',
    type = 'go_dlv_remote',
    request = 'launch',
    mode = 'exec',
    program = bin_from_var_or_pick,
  },
}
-- end of Go }}}

-- C/C++/Rust {{{
-- dap.adapters.cppdbg = {
--   id = 'cppdbg',
--   type = 'executable',
--   command = vim.env.HOME .. '/.local/share/nvim/dap/ms-vscode.cpptools/extension/debugAdapters/bin/OpenDebugAD7',
-- }
dap.adapters.lldb = {
  type = 'executable',
  command = vim.trim(vim.fn.system('command -v lldb-vscode')),
  name = 'lldb',
}

-- dap.configurations.c = {
--   {
--     name = 'Launch binary',
--     type = 'cppdbg',
--     request = 'launch',
--     program = function()
--       local file = vim.g.dapbin
--       if file then return file end
--       -- TODO: assuming meson
--       file = vim.trim(vim.fn.system(
--         [[jq -r '..|select(.type?=="executable")|.filename|.[0]' ]] ..
--         vim.lsp.buf.list_workspace_folders()[1] ..
--         [[/build/meson-info/intro-targets.json]]
--       ))
--       local fd = vim.loop.fs_open(file, "r", 438)
--       if file and fd then
--         vim.loop.fs_close(fd)
--         return file
--       end
--       vim.ui.input('binary: ', function(result) file = result end)
--       return file
--     end,
--     cwd = '${workspaceFolder}',
--     stopOnEntry = true,
--   },
--   {
--     name = 'Attach to gdbserver',
--     type = 'cppdbg',
--     request = 'launch',
--     MIMode = 'gdb',
--     miDebuggerServerAddress = 'localhost:1234',
--     miDebuggerPath = '/usr/bin/gdb',
--     cwd = '${workspaceFolder}',
--     program = function()
--       local file = vim.g.dapbin
--       if file then return file end
--       vim.ui.input('binary: ', function(result) file = result end)
--       return file
--     end,
--   },
-- }

dap.configurations.c = {
  {
    name = 'Launch',
    type = 'lldb',
    request = 'launch',
    program = bin_from_var_or_pick,
    args = {},
    cwd = '${workspaceFolder}',
    stopOnEntry = false,
  },
  {
    name = 'Attach',
    type = 'lldb',
    request = 'attach',
    pid = require('dap.utils').pick_process,
    args = {},
  },
}
dap.configurations.cpp = dap.configurations.c
dap.configurations.rust = dap.configurations.c

-- end of C/C++/Rust }}}