feat(cli): make agent handle --expire like pago

Make the option global and respect `PAGO_EXPIRE`.

Author: dbohdan

cmd/pago-agent/main.go

@@ -19,17 +19,16 @@ import (
 
 type CLI struct {
 	// Global options.
-	Memlock bool   `env:"${MemlockEnv}" default:"true" negatable:"" help:"Lock agent memory with mlockall(2) (${env})"`
-	Socket  string `short:"s" env:"${SocketEnv}" default:"${DefaultSocket}" help:"Agent socket path (${env})"`
+	Expire  time.Duration `short:"e" env:"${ExpireEnv}" default:"0" help:"Agent expiration time (Go duration, 0 to disable)"`
+	Memlock bool          `env:"${MemlockEnv}" default:"true" negatable:"" help:"Lock agent memory with mlockall(2) (${env})"`
+	Socket  string        `short:"s" env:"${SocketEnv}" default:"${DefaultSocket}" help:"Agent socket path (${env})"`
 
 	// Commands.
 	Run     RunCmd     `cmd:"" help:"Run the agent process"`
 	Version VersionCmd `cmd:"" aliases:"v,ver" help:"Print version number and exit"`
 }
 
-type RunCmd struct {
-	Expire time.Duration `short:"e" default:"0" help:"Agent expiration time (Go duration, 0 to disable)"`
-}
+type RunCmd struct{}
 
 func (cmd *RunCmd) Run(cli *CLI) error {
 	if cli.Memlock {
@@ -44,7 +43,7 @@ func (cmd *RunCmd) Run(cli *CLI) error {
 		return fmt.Errorf("failed to create socket directory: %v", err)
 	}
 
-	return agent.Run(cli.Socket, cmd.Expire)
+	return agent.Run(cli.Socket, cli.Expire)
 }
 
 type VersionCmd struct{}
@@ -78,6 +77,7 @@ func main() {
 		kong.Vars{
 			"DefaultSocket": defaultSocket,
 
+			"ExpireEnv":  pago.ExpireEnv,
 			"MemlockEnv": pago.MemlockEnv,
 			"SocketEnv":  pago.SocketEnv,
 		},