Fix run in external terminal not propagating environment variables to…

… program

lua/dap/session.lua

@@ -112,15 +112,23 @@ local function coresume(co)
 end
 
 
-local function launch_external_terminal(terminal, args)
+local function launch_external_terminal(env, terminal, args)
  local handle
  local pid_or_err
  local full_args = {}
  vim.list_extend(full_args, terminal.args or {})
  vim.list_extend(full_args, args)
+ local env_formatted = {}
+ -- Copy environment, prefer vars set by client
+ for k, v in pairs(env and vim.tbl_extend('keep', env, vim.fn.environ()) or {}) do
+ if k:find "^[^=]*$" then -- correct variable?
+ env_formatted[#env_formatted+1] = k.."="..tostring(v)
+ end
+ end
  local opts = {
  args = full_args,
- detached = true
+ detached = true,
+ env = env_formatted,
  }
  handle, pid_or_err = uv.spawn(terminal.command, opts, function(code)
  if handle then
@@ -202,7 +210,7 @@ local function run_in_terminal(lsession, request)
  if not terminal then
  utils.notify('Requested external terminal, but none configured. Fallback to integratedTerminal', vim.log.levels.WARN)
  else
- local handle, pid = launch_external_terminal(terminal, body.args)
+ local handle, pid = launch_external_terminal(body.env, terminal, body.args)
  if not handle then
  utils.notify('Could not launch terminal ' .. terminal.command, vim.log.levels.ERROR)
  end