[#1379] neofs-cli: Move common flags to a separate package

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

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

@@ -0,0 +1,65 @@
+package commonflags
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// Common CLI flag keys, shorthands, default
+// values and their usage descriptions.
+const (
+	GenerateKey          = "generate-key"
+	generateKeyShorthand = "g"
+	generateKeyDefault   = false
+	generateKeyUsage     = "generate new private key"
+
+	WalletPath          = "wallet"
+	WalletPathShorthand = "w"
+	WalletPathDefault   = ""
+	WalletPathUsage     = "WIF (NEP-2) string or path to the wallet or binary key"
+
+	Account          = "address"
+	AccountShorthand = ""
+	AccountDefault   = ""
+	AccountUsage     = "address of wallet account"
+
+	RPC          = "rpc-endpoint"
+	RPCShorthand = "r"
+	RPCDefault   = ""
+	RPCUsage     = "remote node address (as 'multiaddr' or '<host>:<port>')"
+
+	Verbose          = "verbose"
+	VerboseShorthand = "v"
+	VerboseUsage     = "verbose output"
+)
+
+// Init adds common flags to the command:
+// - GenerateKey
+// - WalletPath
+// - Account
+// - RPC
+func Init(cmd *cobra.Command) {
+	InitWithoutRPC(cmd)
+
+	ff := cmd.Flags()
+	ff.StringP(RPC, RPCShorthand, RPCDefault, RPCUsage)
+}
+
+// InitWithoutRPC is similar to Init but doesn't create the RPC flag.
+func InitWithoutRPC(cmd *cobra.Command) {
+	ff := cmd.Flags()
+
+	ff.BoolP(GenerateKey, generateKeyShorthand, generateKeyDefault, generateKeyUsage)
+	ff.StringP(WalletPath, WalletPathShorthand, WalletPathDefault, WalletPathUsage)
+	ff.StringP(Account, AccountShorthand, AccountDefault, AccountUsage)
+}
+
+// Bind binds common command flags to the viper.
+func Bind(cmd *cobra.Command) {
+	ff := cmd.Flags()
+
+	_ = viper.BindPFlag(GenerateKey, ff.Lookup(GenerateKey))
+	_ = viper.BindPFlag(WalletPath, ff.Lookup(WalletPath))
+	_ = viper.BindPFlag(Account, ff.Lookup(Account))
+	_ = viper.BindPFlag(RPC, ff.Lookup(RPC))
+}