emulate foreman in wezterm. Not very successfully. TODO: try again when https://github.com/wezterm/wezterm/issues/1970 is solved

wezterm-foreman.lua

-- Helper function to parse Procfile lines
local function parse_procfile(dir)
  local commands = {}
  local file_path = dir .. '/Procfile.dev'
  local f = io.open(file_path, 'r')

  if f then
    for line in f:lines() do
      if line ~= '' and not line:match('^%s*#') then
        local name, cmd = line:match('^%s*([%w%-_]+)%s*:%s*(.+)$')
        if name and cmd then
          table.insert(commands, { name = name, cmd = cmd })
        end
      end
    end
    f:close()
  end

  return commands
end

-- Define layout logic as a global WezTerm Event Listener
wezterm.on('run-foreman', function(window, pane)
  local cwd = pane:get_current_working_dir()
  if not cwd then return end

  local path = cwd.file_path
  wezterm.log_info("Triggered Foreman script in directory: " .. path)
  local services = parse_procfile(path)

  if #services == 0 then
    wezterm.log_error("No Procfile.dev found in " .. path)
    return
  end

  wezterm.log_info("Found " .. #services .. " commands to execute.")

  local current_pane = pane

  -- Track the primary master pane at the top
  local master_pane = pane
  local total_services = #services

  for i, service in ipairs(services) do
    local cmd_args = { 'sh', '-c', string.format([[printf "\033]2;%s\007"; %s]], service.name, service.cmd) }

    if i == 1 then
      -- First service runs in the original pane (use send_text safely here)
      master_pane:send_text(string.format([[printf "\033]2;%s\007"; %s]] .. "\n", service.name, service.cmd))
    else
      -- Background services are split into 1-cell high rows at the bottom
      master_pane:split({
        direction = 'Bottom',
        size = 0.04, -- Compresses background panes into a single line
        cwd = path,
        args = cmd_args, -- Isolated execution prevents bash 'command not found' errors
      })
    end
  end
end)

config.keys = {
  -- ...
  { key = 'p', mods = 'CMD', action = wezterm.action.EmitEvent 'run-foreman', },
}