go-serviceman/serviceman.go

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2019-07-01 08:44:48 +00:00
//go:generate go run -mod=vendor git.rootprojects.org/root/go-gitver
package main
import (
"flag"
"fmt"
"log"
"os"
"path/filepath"
"strings"
"time"
"git.rootprojects.org/root/go-serviceman/installer"
)
var GitRev = "000000000"
var GitVersion = "v0.0.0"
var GitTimestamp = time.Now().Format(time.RFC3339)
func main() {
conf := &installer.Config{
Restart: true,
}
args := []string{}
for i := range os.Args {
if "--" == os.Args[i] {
if len(os.Args) > i+1 {
args = os.Args[i+1:]
}
os.Args = os.Args[:i]
break
}
}
conf.Argv = args
conf.Args = strings.Join(conf.Argv, " ")
forUser := false
forSystem := false
flag.StringVar(&conf.Title, "title", "", "a human-friendly name for the service")
flag.StringVar(&conf.Desc, "desc", "", "a human-friendly description of the service (ex: Foo App)")
flag.StringVar(&conf.Name, "name", "", "a computer-friendly name for the service (ex: foo-app)")
flag.StringVar(&conf.URL, "url", "", "the documentation on home page of the service")
flag.StringVar(&conf.ReverseDNS, "rdns", "", "a plist-friendly Reverse DNS name for launchctl (ex: com.example.foo-app)")
flag.BoolVar(&forSystem, "system", false, "attempt to install system service as an unprivileged/unelevated user")
flag.BoolVar(&forUser, "user", false, "install user space / user mode service even when admin/root/sudo/elevated")
flag.StringVar(&conf.User, "username", "", "run the service as this user")
flag.StringVar(&conf.Group, "groupname", "", "run the service as this group")
flag.BoolVar(&conf.PrivilegedPorts, "cap-net-bind", false, "this service should have access to privileged ports")
flag.Parse()
args = flag.Args()
if forUser && forSystem {
fmt.Println("Pfff! You can't --user AND --system! What are you trying to pull?")
os.Exit(1)
}
if forUser {
conf.System = false
} else if forSystem {
conf.System = true
} else {
conf.System = installer.IsPrivileged()
}
n := len(args)
if 0 == n {
fmt.Println("Usage: serviceman install ./foo-app -- --foo-arg")
os.Exit(1)
}
execpath, err := installer.WhereIs(args[0])
if nil != err {
fmt.Fprintf(os.Stderr, "Error: '%s' could not be found.", args[0])
os.Exit(1)
}
args[0] = execpath
conf.Exec = args[0]
args = args[1:]
if n >= 2 {
conf.Interpreter = conf.Exec
conf.Exec = args[0]
conf.Argv = append(args[1:], conf.Argv...)
}
if "" == conf.Name {
ext := filepath.Ext(conf.Exec)
base := filepath.Base(conf.Exec[:len(conf.Exec)-len(ext)])
conf.Name = strings.ToLower(base)
}
if "" == conf.Title {
conf.Title = conf.Name
}
if "" == conf.ReverseDNS {
conf.ReverseDNS = "com.example." + conf.Name
}
fmt.Printf("\n%#v\n\n", conf)
err = installer.Install(conf)
if nil != err {
log.Fatal(err)
}
}