[#161] adm: Refactor init context creation

Resolve funlen linter for newInitializeContext function

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

cmd/frostfs-adm/internal/modules/morph/initialize.go

@@ -108,7 +108,6 @@ func (c *initializeContext) close() {
 	}
 }
 
-// nolint: funlen
 func newInitializeContext(cmd *cobra.Command, v *viper.Viper) (*initializeContext, error) {
 	walletDir := config.ResolveHomePath(viper.GetString(alphabetWalletsFlag))
 	wallets, err := openAlphabetWallets(v, walletDir)
@@ -119,24 +118,14 @@ func newInitializeContext(cmd *cobra.Command, v *viper.Viper) (*initializeContex
 	needContracts := cmd.Name() == "update-contracts" || cmd.Name() == "init"
 
 	var w *wallet.Wallet
-	if needContracts {
-		w, err = openContractWallet(v, cmd, walletDir)
-		if err != nil {
-			return nil, err
-		}
+	w, err = getWallet(cmd, v, needContracts, walletDir)
+	if err != nil {
+		return nil, err
 	}
 
-	var c Client
-	if v.GetString(localDumpFlag) != "" {
-		if v.GetString(endpointFlag) != "" {
-			return nil, fmt.Errorf("`%s` and `%s` flags are mutually exclusive", endpointFlag, localDumpFlag)
-		}
-		c, err = newLocalClient(cmd, v, wallets)
-	} else {
-		c, err = getN3Client(v)
-	}
+	c, err := createClient(cmd, v, wallets)
 	if err != nil {
-		return nil, fmt.Errorf("can't create N3 client: %w", err)
+		return nil, err
 	}
 
 	committeeAcc, err := getWalletAccount(wallets[0], committeeAccountName)
@@ -149,35 +138,22 @@ func newInitializeContext(cmd *cobra.Command, v *viper.Viper) (*initializeContex
 		return nil, fmt.Errorf("can't find consensus account: %w", err)
 	}
 
-	var ctrPath string
-	if cmd.Name() == "init" {
-		if viper.GetInt64(epochDurationInitFlag) <= 0 {
-			return nil, fmt.Errorf("epoch duration must be positive")
-		}
-
-		if viper.GetInt64(maxObjectSizeInitFlag) <= 0 {
-			return nil, fmt.Errorf("max object size must be positive")
-		}
+	if err := validateInit(cmd); err != nil {
+		return nil, err
 	}
 
-	if needContracts {
-		ctrPath, err = cmd.Flags().GetString(contractsInitFlag)
-		if err != nil {
-			return nil, fmt.Errorf("invalid contracts path: %w", err)
-		}
+	ctrPath, err := getContractsPath(cmd, v, needContracts)
+	if err != nil {
+		return nil, err
 	}
 
 	if err := checkNotaryEnabled(c); err != nil {
 		return nil, err
 	}
 
-	accounts := make([]*wallet.Account, len(wallets))
-	for i, w := range wallets {
-		acc, err := getWalletAccount(w, singleAccountName)
-		if err != nil {
-			return nil, fmt.Errorf("wallet %s is invalid (no single account): %w", w.Path(), err)
-		}
-		accounts[i] = acc
+	accounts, err := createWalletAccounts(wallets)
+	if err != nil {
+		return nil, err
 	}
 
 	cliCtx, err := defaultClientContext(c, committeeAcc)
@@ -207,6 +183,69 @@ func newInitializeContext(cmd *cobra.Command, v *viper.Viper) (*initializeContex
 	return initCtx, nil
 }
 
+func validateInit(cmd *cobra.Command) error {
+	if cmd.Name() != "init" {
+		return nil
+	}
+	if viper.GetInt64(epochDurationInitFlag) <= 0 {
+		return fmt.Errorf("epoch duration must be positive")
+	}
+
+	if viper.GetInt64(maxObjectSizeInitFlag) <= 0 {
+		return fmt.Errorf("max object size must be positive")
+	}
+
+	return nil
+}
+
+func createClient(cmd *cobra.Command, v *viper.Viper, wallets []*wallet.Wallet) (Client, error) {
+	var c Client
+	var err error
+	if v.GetString(localDumpFlag) != "" {
+		if v.GetString(endpointFlag) != "" {
+			return nil, fmt.Errorf("`%s` and `%s` flags are mutually exclusive", endpointFlag, localDumpFlag)
+		}
+		c, err = newLocalClient(cmd, v, wallets)
+	} else {
+		c, err = getN3Client(v)
+	}
+	if err != nil {
+		return nil, fmt.Errorf("can't create N3 client: %w", err)
+	}
+	return c, nil
+}
+
+func getWallet(cmd *cobra.Command, v *viper.Viper, needContracts bool, walletDir string) (*wallet.Wallet, error) {
+	if !needContracts {
+		return nil, nil
+	}
+	return openContractWallet(v, cmd, walletDir)
+}
+
+func getContractsPath(cmd *cobra.Command, v *viper.Viper, needContracts bool) (string, error) {
+	if !needContracts {
+		return "", nil
+	}
+
+	ctrPath, err := cmd.Flags().GetString(contractsInitFlag)
+	if err != nil {
+		return "", fmt.Errorf("invalid contracts path: %w", err)
+	}
+	return ctrPath, nil
+}
+
+func createWalletAccounts(wallets []*wallet.Wallet) ([]*wallet.Account, error) {
+	accounts := make([]*wallet.Account, len(wallets))
+	for i, w := range wallets {
+		acc, err := getWalletAccount(w, singleAccountName)
+		if err != nil {
+			return nil, fmt.Errorf("wallet %s is invalid (no single account): %w", w.Path(), err)
+		}
+		accounts[i] = acc
+	}
+	return accounts, nil
+}
+
 func openAlphabetWallets(v *viper.Viper, walletDir string) ([]*wallet.Wallet, error) {
 	walletFiles, err := os.ReadDir(walletDir)
 	if err != nil {