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/
main.go
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/
main.go
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package main
import (
"bufio"
"fmt"
"os"
"os/exec"
"strings"
"github.com/blablacar/dgr/dgr/common"
"github.com/n0rad/go-erlog"
"github.com/n0rad/go-erlog/logs"
_ "github.com/n0rad/go-erlog/register"
"github.com/spf13/cobra"
)
const dgrEnvPrefix = "DGR_ENV_"
var BuildCommit string
var BuildVersion string
var BuildTime string
var Args = BuildArgs{}
var workPath string
type BuildArgs struct {
Force bool
Test bool
NoTestFail bool
KeepBuilder bool
CatchOnError bool
CatchOnStep bool
ParallelBuild bool
PullPolicy string
SetEnv envMap
}
func main() {
logs.GetDefaultLog().(*erlog.ErlogLogger).Appenders[0].(*erlog.ErlogWriterAppender).Out = os.Stdout
if os.Getuid() != 0 {
println("dgr needs to be run as root")
os.Exit(1)
}
if !SupportsOverlay() {
logs.Fatal("Overlay filesystem is required")
}
Execute()
}
func Execute() {
var version bool
var homePath string
var targetRootPath string
var logLevel string
var rootCmd = &cobra.Command{
Use: "dgr",
Run: func(cmd *cobra.Command, args []string) {
cmd.Help()
os.Exit(1)
},
PersistentPreRun: func(cmd *cobra.Command, args []string) {
if version {
displayVersionAndExit()
}
level, err := logs.ParseLevel(logLevel)
if err != nil {
fmt.Printf("Unknown log level : %s\n", logLevel)
os.Exit(1)
}
logs.SetLevel(level)
Home = NewHome(homePath)
if targetRootPath != "" {
Home.Config.TargetWorkDir = targetRootPath
}
if Args.PullPolicy != "" && !common.PullPolicy(Args.PullPolicy).IsValid() {
logs.WithField("pull-policy", Args.PullPolicy).Fatal("Invalid pull-policy")
}
},
}
rootCmd.PersistentFlags().StringVarP(&targetRootPath, "targets-root-path", "p", "", "Set targets root path")
rootCmd.PersistentFlags().StringVarP(&logLevel, "loglevel", "L", "info", "Set log level")
rootCmd.PersistentFlags().StringVar(&logLevel, "log-level", "info", "Set log level")
rootCmd.PersistentFlags().StringVarP(&homePath, "home-path", "H", DefaultHomeFolder(""), "Set home folder")
rootCmd.PersistentFlags().StringVarP(&workPath, "work-path", "W", ".", "Set the work path")
rootCmd.PersistentFlags().BoolVarP(&version, "version", "V", false, "Display dgr version")
rootCmd.PersistentFlags().Var(&Args.SetEnv, "set-env", "Env passed to builder scripts")
rootCmd.PersistentFlags().StringVar(&Args.PullPolicy, "pull-policy", "", "force rkt fetch Policy")
rootCmd.PersistentFlags().BoolVarP(&Args.ParallelBuild, "parallel", "P", false, "Run build in parallel for pod")
rootCmd.AddCommand(
buildCmd,
cleanCmd,
pushCmd,
installCmd,
testCmd,
versionCmd,
initCmd,
graphCmd,
tryCmd,
signCmd,
aciVersion,
configCmd,
updateCmd,
cpCmd,
)
readEnvironment()
rootCmd.Execute()
logs.Debug("Victory !")
}
func readEnvironment() {
for _, v := range os.Environ() {
if !strings.HasPrefix(v, dgrEnvPrefix) {
continue
}
Args.SetEnv.Set(v[len(dgrEnvPrefix):])
}
}
func SupportsOverlay() bool {
exec.Command("modprobe", "overlay").Run()
f, err := os.Open("/proc/filesystems")
if err != nil {
fmt.Println("error opening /proc/filesystems")
return false
}
defer f.Close()
s := bufio.NewScanner(f)
for s.Scan() {
if s.Text() == "nodev\toverlay" {
return true
}
}
return false
}
func displayVersionAndExit() {
fmt.Print("dgr\n\n")
fmt.Printf("version : %s\n", BuildVersion)
if BuildTime != "" {
fmt.Printf("build date : %s\n", BuildTime)
}
if BuildCommit != "" {
fmt.Printf("CommitHash : %s\n", BuildCommit)
}
os.Exit(0)
}
func NewAciOrPod(path string, args BuildArgs) DgrCommand {
if aci, err := NewAci(path, args); err == nil {
return aci
} else if pod, err2 := NewPod(path, args); err2 == nil {
return pod
} else {
logs.WithE(err).WithField("path", path).WithField("err2", err2).Fatal("Cannot construct aci or pod")
}
return nil
}
func giveBackUserRights(path string) {
uid := "0"
gid := "0"
if os.Getenv("SUDO_UID") != "" {
uid = os.Getenv("SUDO_UID")
gid = os.Getenv("SUDO_GID")
}
common.ExecCmd("chown", "-R", uid+":"+gid, path)
}