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pz.go
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pz.go
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package main
import (
"encoding/json"
"fmt"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/container"
cliflags "github.com/docker/cli/cli/flags"
"github.com/pkg/browser"
goridgeRpc "github.com/spiral/goridge/v3/pkg/rpc"
"gopkg.in/yaml.v3"
"io/ioutil"
"math/rand"
"net"
"net/rpc"
"os"
"os/exec"
"strings"
"time"
)
var (
version = "dev"
commit = "none"
date = "unknown"
builtBy = "unknown"
)
func main() {
if _, err := os.Stat("./.pz.yaml"); os.IsNotExist(err) {
fmt.Printf("Missing \"./.pz.yaml\" file.\r\n")
os.Exit(1)
}
pzConfig := readPzConfig()
dockerImage := pzConfig.ProjectZer0.DockerImage
dockerEntrypoint := pzConfig.ProjectZer0.DockerEntrypoint
if len(dockerImage) <= 0 {
dockerImage = "projectzer0/pz-launcher"
}
if len(dockerEntrypoint) <= 0 {
dockerEntrypoint = "/project/vendor/project-zer0/pz/docker/docker-entrypoint.sh"
}
wslPath := "NULL"
if _, err := exec.LookPath("wslpath"); err == nil {
cmd := exec.Command("wslpath", "-aw", "./")
if result, err := cmd.Output(); err == nil {
wslPath = strings.TrimRight(string(result), "\n")
}
}
done := make(chan struct{})
var ipcPort = randomTCPPort()
go listenIPCServer(ipcPort, done)
dockerCli, err := command.NewDockerCli()
if err != nil {
fmt.Fprintln(os.Stderr, err)
done <- struct{}{}
os.Exit(1)
}
if err := runDocker(dockerCli, dockerImage, dockerEntrypoint, ipcPort, wslPath); err != nil {
done <- struct{}{}
if sterr, ok := err.(cli.StatusError); ok {
if sterr.Status != "" {
fmt.Fprintln(dockerCli.Err(), sterr.Status)
}
// StatusError should only be used for errors, and all errors should
// have a non-zero exit status, so never exit with 0
if sterr.StatusCode == 0 {
os.Exit(1)
}
os.Exit(sterr.StatusCode)
}
fmt.Fprintln(dockerCli.Err(), err)
os.Exit(1)
}
done <- struct{}{}
}
func runDocker(dockerCli *command.DockerCli, dockerImage string, dockerEntrypoint string, ipcPort int, wslPath string) error {
currentDir, err := os.Getwd()
if err != nil {
return err
}
cmd := container.NewRunCommand(dockerCli)
cmd.SilenceErrors = true
cmd.SilenceUsage = true
var opts = cliflags.NewClientOptions()
opts.Common.SetDefaultOptions(cmd.Flags())
if err := dockerCli.Initialize(opts); err != nil {
return err
}
var defaultArgs = []string{
"-e",
"PZ_PWD=" + currentDir,
"-e",
"PZ_WSL_PATH=" + wslPath,
"-e",
fmt.Sprintf("PZ_PORT=%d", ipcPort),
"-e",
"PZ_LAUNCHER_VERSION=" + version,
"--entrypoint=" + dockerEntrypoint,
"-v",
currentDir + ":/project",
"-v",
currentDir + "/.pz/.docker:/root/.docker",
"-v",
"/var/run/docker.sock:/var/run/docker.sock",
"-w",
"/project",
"--rm",
"-it",
dockerImage,
}
cmd.SetArgs(append(defaultArgs, os.Args[1:]...))
return cmd.Execute()
}
type PzApp struct{}
func (s *PzApp) OpenURL(payload string, r *string) error {
type Json struct {
Url string `json:"url"`
}
var packet Json
if err := json.Unmarshal([]byte(payload), &packet); err != nil {
panic(err)
}
if err := browser.OpenURL(packet.Url); err != nil {
panic(err)
}
*r = "{\"status\":\"ok\"}"
return nil
}
const (
minTCPPort = 0
maxTCPPort = 65535
maxReservedTCPPort = 1024
maxRandTCPPort = maxTCPPort - (maxReservedTCPPort + 1)
)
var (
tcpPortRand = rand.New(rand.NewSource(time.Now().UnixNano()))
)
// isTCPPortAvailable returns a flag indicating whether or not a TCP port is
// available.
func isTCPPortAvailable(port int) bool {
if port < minTCPPort || port > maxTCPPort {
return false
}
conn, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:%d", port))
if err != nil {
return false
}
conn.Close()
return true
}
// randomTCPPort gets a free, random TCP port between 1025-65535. If no free
// ports are available -1 is returned.
func randomTCPPort() int {
for i := maxReservedTCPPort; i < maxTCPPort; i++ {
p := tcpPortRand.Intn(maxRandTCPPort) + maxReservedTCPPort + 1
if isTCPPortAvailable(p) {
return p
}
}
return -1
}
func listenIPCServer(port int, done chan struct{}) {
addr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("127.0.0.1:%d", port))
if err != nil {
panic(err)
}
server, err := net.ListenTCP("tcp", addr)
if err != nil {
panic(err)
}
defer server.Close()
_ = rpc.Register(new(PzApp))
for {
select {
case <-done:
return
default:
if err := server.SetDeadline(time.Now().Add(time.Second)); err != nil {
panic(err)
}
conn, err := server.Accept()
if err != nil {
if os.IsTimeout(err) {
continue
}
panic(err)
}
go rpc.ServeCodec(goridgeRpc.NewCodec(conn))
}
}
}
type pzConfig struct {
ProjectZer0 struct {
DockerImage string `yaml:"launcher_docker_image"`
DockerEntrypoint string `yaml:"launcher_docker_entrypoint"`
} `yaml:"project_zer0"`
}
func readPzConfig() pzConfig {
yamlFile, err := ioutil.ReadFile("./.pz.yaml")
if err != nil {
panic(err)
}
var pzConfig pzConfig
err = yaml.Unmarshal(yamlFile, &pzConfig)
if err != nil {
panic(err)
}
return pzConfig
}