feat: support --list-hosts tools command

[qcu266]

support list all tssh hosts.

in my case, I want to use wezterm to integrate tssh for ssh session management.

-- tssh.lua
local wezterm = require 'wezterm'

local M = {}

local function host_list()
    local hosts = {}
    local success, stdout, stderr = wezterm.run_child_process {
        'tssh',
        '--list-hosts',
    }
    hosts = wezterm.json_parse(stdout)

    return hosts
end

local function make_tssh_label_func(host)
    return wezterm.format {
        { Foreground = { AnsiColor = 'Green' } },
        { Text = "groups:" .. host["GroupLabels"] },
    }
end

local function make_tssh_fixup_func(alias)
    return function(cmd)
        local wrapped = {
            "tssh",
            alias,
        }
        cmd.args = wrapped
        -- wezterm.log_error(cmd)

        return cmd
    end
end

function M.compute_exec_domains()
    local exec_domains = {}
    for _, host in pairs(host_list()) do
        local alias = host["Alias"]
        local fixup = make_tssh_fixup_func(alias)
        local label_func = make_tssh_label_func(host)
        table.insert(
            exec_domains,
            wezterm.exec_domain(
                'tssh:' .. alias,
                fixup,
                label_func
            )
        )
    end
    return exec_domains
end

return M

-- wezterm.lua
local wezterm = require 'wezterm'
local tssh = require('tssh')

local config = {}
if wezterm.config_builder then
  config = wezterm.config_builder()
end

config.exec_domains = tssh.compute_exec_domains()

[lonnywong]

@qcu266 Thanks for the PR.

Can you also write a simple user guide for it? Consider putting it on the wiki. It can be Chinese or English.

It is best to describe the advantages of the integration, or record a screen to show it.