run batch commands

this is useful for initialization scripts or the like.
the parser is very basic, but should still be useful

cmd/panelcli/cli.go

@@ -1,10 +1,12 @@
 package main
 
 import (
+	"bufio"
 	"flag"
 	"fmt"
 	"io"
 	"os"
+	"strings"
 
 	paneldb "git.lattuga.net/boyska/feedpanel/db"
 	"github.com/go-pg/pg"
@@ -22,6 +24,7 @@ var cmdMap map[string]commandFunc
 
 func init() {
 	cmdMap = map[string]commandFunc{
+		"batch":     cmdBatch,
 		"setup":     cmdSetup,
 		"adduser":   cmdAddUser,
 		"listusers": cmdListUsers,
@@ -160,6 +163,37 @@ func usage(w io.Writer) {
 	}
 }
 
+func runLine(args []string) {
+	cmdName := args[0]
+	cmdFunc, ok := cmdMap[cmdName]
+	if !ok {
+		fmt.Fprintf(os.Stderr, "Invalid command `%s`\n", cmdName)
+		usage(os.Stderr)
+		os.Exit(2)
+	}
+	err := cmdFunc(args)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "Error")
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func cmdBatch(args []string) error {
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		line := scanner.Text()
+		runLine(strings.Split(line, " "))
+	}
+
+	if scanner.Err() != nil {
+		fmt.Fprintln(os.Stderr, "Error reading stdin:", scanner.Err())
+		os.Exit(1)
+	}
+	os.Exit(0)
+	return nil
+}
+
 func main() {
 	flag.StringVar(&globalOptions.pgOptions.User, "db-user", "panel", "The user to connect to database to")
 	flag.StringVar(&globalOptions.pgOptions.Password, "db-pass", "", "database password")
@@ -167,23 +201,12 @@ func main() {
 	flag.StringVar(&globalOptions.pgOptions.Addr, "db-addr", "127.0.0.1:5432", "database network address")
 	flag.BoolVar(&globalOptions.verbose, "verbose", false, "verbose output")
 	flag.Parse()
+
 	if len(flag.Args()) < 1 {
 		fmt.Fprintln(os.Stderr, "Not enough arguments!")
 		usage(os.Stderr)
 		os.Exit(2)
 	}
-	cmdName := flag.Args()[0]
-	cmdFunc, ok := cmdMap[cmdName]
-	if !ok {
-		fmt.Fprintf(os.Stderr, "Invalid command `%s`\n", cmdName)
-		usage(os.Stderr)
-		os.Exit(2)
-	}
-	err := cmdFunc(flag.Args())
-	if err != nil {
-		fmt.Fprintln(os.Stderr, "Error")
-		fmt.Fprintln(os.Stderr, err)
-		os.Exit(1)
-	}
+	runLine(flag.Args())
 	os.Exit(0)
 }