vadv / gopher-lua-libs

Libs for gopher lua

gopher-lua-libs

Package contains is a libs for gopher-lua.

License

Development version, available on github, released under BSD 3-clause.

Installation

go get github.com/vadv/gopher-lua-libs

Index

• argparse argparse CLI parsing https://github.com/luarocks/argparse
• base64 encoding/base64 api
• cloudwatch aws cloudwatch log access
• cert_util monitoring ssl certs
• chef chef client api
• cmd cmd port
• crypto calculate md5, sha256 hash for string
• db access to databases
• filepath path.filepath port
• goos os port
• http http.client && http.server
• humanize humanize github.com/dustin/go-humanize port
• inspect pretty print github.com/kikito/inspect.lua
• ioutil io/ioutil port
• json json implementation
• log log port
• plugin run lua code in lua code
• pprof pprof http-server for golang from lua
• prometheus prometheus exporter
• regexp regexp port
• runtime runtime port
• pb https://github.com/cheggaaa/pb port (v3)
• shellescape shellescape https://github.com/alessio/shellescape port
• stats stats https://github.com/montanaflynn/stats port
• storage package for store persist data and share values between lua states
• strings strings port (utf supported)
• tac tac line-by-line scanner (from end of file to up)
• tcp raw tcp client lib
• telegram telegram bot
• template template engines
• time time port
• xmlpath gopkg.in/xmlpath.v2 port
• yaml gopkg.in/yaml.v2 port
• zabbix zabbix bot

Usage

For the quick overview you can use standalone interpreter with listed libs. Examples and documentation for modules can be found in their directories.

go install github.com/vadv/gopher-lua-libs/cmd/glua-libs@latest

glua-libs example.lua

This example shows basic usage of this libs in your code

package main


import (
        "log"
        "flag"
        "os"

        lua "github.com/yuin/gopher-lua"
        libs "github.com/vadv/gopher-lua-libs"

)
var (
        exec = flag.String("execute", "", "execute lua script")
)


func main() {
        flag.Parse()
        state := lua.NewState()
        defer state.Close()
        libs.Preload(state)
        if *exec != `` {
                if err := state.DoFile(*exec); err != nil {
                        log.Printf("[ERROR] Error executing file: ", err)
                }
        } else {
                log.Println("Target file was not given!")
                os.Exit(0)
        }
}

gopher-lua-libs's Issues

YAML encoding

The json library supports both Encoding and Decoding.
Would you accept a PR to make YAML encoding work, too?
This would simplify the work I've done in my own library.
As I'd like to have your extensions to use.

Broken ci runs with fresh packages

Greetings. Just warning. With recent updates of cbroglie/mustache and go-sql-driver/mysql CI runs is broken. Go modules not working there, because Travis worker clones git repo and put it inside GOPATH and GO111MODULE set to 'auto'.

go get: warning: modules disabled by GO111MODULE=auto in GOPATH/src;

	ignoring go.mod;

	see 'go help modules'

This behavior changed in go 1.13 - https://github.com/golang/go/wiki/Modules#recent-changes

Refered issues:
cbroglie/mustache#36
go-sql-driver/mysql#1040

With next update of this dependencies glua-libs can't be compiled with go < 1.13

Please make a release so folks can use new modules (like shellescape) with proper version

Please create a release (v0.1.3?) so that the new module "shellescape" can be used without grabbing the latest from the sha via v0.1.3-0.20220321153755-354f4b160461

Unknown type error in db plugin (pg)

Greetings!
Thank you for your libs.
If I make select query against type timestamp

query:
local result, err = pg:query("SELECT insert_date FROM table WHERE state = 0 LIMIT 1")

parse:
for _, r in pairs(result.rows) do
    for id, column in pairs(result.columns) do
        print(column, r[id])
    end
end

2019/01/15 18:25:11 [ERROR] unknown type (value: `time.Time{wall:0xfd2b478, ext:63683068860, loc:(*time.Location)(0xc0001d41e0)}`, converted: `time.Time{wall:0xfd2b478, ext:63683068860, loc:(*time.Location)(0xc0001d41e0)}`)


insert_date	nil

Is it possible to convent it to right type?
In typelist of Gopher-lua I did not found type time.
Thanks!

数据库连接能否使用golang里面传递过来么

json lib treats empty object as array

If you json.encode(json.decode("{}") you get "[]"

It should return {}

Usage http.server as plugin after error

Greetings! I try to start http service as plugin. But if main loop tries to restart server after error I got error binding for port. This is example.

local plugin = require("plugin")
local time = require("time")


local plugin_server = [[
http = require("http")
inspect = require("inspect")

s = {}

local server, err = http.server("127.0.0.1:5001")
if err then error(err) end

function s.start()
  while true do
    local req, resp = server:accept()
    print(inspect(req))

    if req then 
    
      print("received")
      resp:code(500)
      resp:done()

      error("I am broken")
    end
  end
end


s.start()
]]



server = plugin.do_string(plugin_server)
server:run()

while true do
  time.sleep(1)
  if not server:is_running() then
    print("error:", tostring(server:error()))
    server:run()
  end
end

error:	<string>:20: I am broken
stack traceback:
	[G]: in function 'error'
	<string>:20: in function 'start'
	<string>:26: in main chunk
	[G]: ?
error:	<string>:7: listen tcp 127.0.0.1:5001: bind: address already in use
stack traceback:
	[G]: in function 'error'
	<string>:7: in main chunk
	[G]: ?

Is any way to use http.server like this?
Thank you!

gopher-lua-libs/xmlpath/ not suport xml

Do you have any plans to support XML?

Function to push 3rd party modules to plugin package

Greetings. Let's assume we have any golang package for glua-libs in somewhere outside of this repo. For example, ssh - https://github.com/spigell/luscheduler/tree/master/libs/ssh. There is no big deal to add glua-libs and custom resources to project, but if we will use plugin package with 3rd party modules inside then it seems to not loading.

local plugin = require("plugin")

local plugin_body = [[
    local time = require("time")
    local chef = require("chef")
    local cron = require("ssh")

    local i = 1
    print(i)
    time.sleep(2)
]]

local string_plugin = plugin.do_string(plugin_body)
string_plugin:run()

time.sleep(1)
if file_plugin:is_running() then
  print("RUNNING")
else
  print("NOT RUNNING")
  print(string_plugin:error())
end

NOT RUNNING
<string>:3: module ssh not found:
	no field package.preload['ssh']
	stat ./ssh.lua: no such file or directory
	stat /usr/local/share/lua/5.1/ssh.lua: no such file or directory
	stat /usr/local/share/lua/5.1/ssh/init.lua: no such file or directory, 
stack traceback:
	[G]: in function 'require'
	<string>:3: in main chunk
	[G]: ?

In plugin package creates a new Lua state with only static list of modules - https://github.com/vadv/gopher-lua-libs/blob/master/plugin/api.go#L75
Is there any change add modules to preload table in the state?

Loader returned by require contains only Lua table with methods without metadata and do not fit for PreloadModules function.