[#1074] neofs-cli: Move common API flags to a separate package

TTL and XHeader flags are reused between multiple commands.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

cmd/neofs-cli/internal/commonflags/api.go

@@ -0,0 +1,33 @@
+package commonflags
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+const (
+	TTL          = "ttl"
+	TTLShorthand = ""
+	TTLDefault   = 2
+	TTLUsage     = "TTL value in request meta header"
+
+	XHeadersKey       = "xhdr"
+	XHeadersShorthand = "x"
+	XHeadersUsage     = "Request X-Headers in form of Key=Value"
+)
+
+// InitAPI inits common flags for storage node services.
+func InitAPI(cmd *cobra.Command) {
+	ff := cmd.Flags()
+
+	ff.StringSliceP(XHeadersKey, XHeadersShorthand, []string{}, XHeadersUsage)
+	ff.Uint32P(TTL, TTLShorthand, TTLDefault, TTLUsage)
+}
+
+// BindAPI binds API flags of storage node services to the viper.
+func BindAPI(cmd *cobra.Command) {
+	ff := cmd.Flags()
+
+	_ = viper.BindPFlag(TTL, ff.Lookup(TTL))
+	_ = viper.BindPFlag(XHeadersKey, ff.Lookup(XHeadersKey))
+}