Check for backslashes in remote branch name

Fixes #332

commit-id:a7c1a3c3

cmd/spr/main.go

@@ -40,6 +40,12 @@ func main() {
 	}
 
 	cfg := config_parser.ParseConfig(gitcmd)
+
+	err = config_parser.CheckConfig(cfg)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(2)
+	}
 	gitcmd = realgit.NewGitCmd(cfg)
 
 	ctx := context.Background()

config/config_parser/config_parser.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"strings"
 
 	"github.com/ejoffe/rake"
 	"github.com/ejoffe/spr/config"
@@ -63,6 +64,13 @@ func ParseConfig(gitcmd git.GitInterface) *config.Config {
 	return cfg
 }
 
+func CheckConfig(cfg *config.Config) error {
+	if strings.Contains(cfg.Repo.GitHubBranch, "/") {
+		return errors.New("Remote branch name must not contain backslashes '/'")
+	}
+	return nil
+}
+
 func RepoConfigFilePath(gitcmd git.GitInterface) string {
 	rootdir := gitcmd.RootDir()
 	filepath := filepath.Clean(path.Join(rootdir, ".spr.yml"))