CLI: refactor print help

cli/CHANGELOG.md

@@ -32,6 +32,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - `WalletCommand::Mnemonic` now takes 2 optional arguments to avoid user interaction;
 - `AccountCommand::Transaction` now accepts either an index or an ID;
+- Use `CommandFactory` to print help programmatically;
+- `print_wallet_help` changed to `WalletCli::print_help`;
+- `print_account_help` changed to `AccountCli::print_help`;
 
 ## 1.0.0 - 2023-07-27
 

cli/src/account.rs

@@ -20,7 +20,7 @@ use crate::{
         voting_power_command, AccountCli, AccountCommand,
     },
     error::Error,
-    helper::{bytes_from_hex_or_file, print_account_help},
+    helper::bytes_from_hex_or_file,
     println_log_error,
 };
 
@@ -67,7 +67,7 @@ pub async fn account_prompt_internal(
         .completion_with(&AccountCompletion)
         .interact_text()?;
     match command.as_str() {
-        "h" | "help" => print_account_help(),
+        "h" | "help" => AccountCli::print_help()?,
         "c" | "clear" => {
             // Clear console
             let _ = std::process::Command::new("clear").status();

cli/src/command/account.rs

@@ -3,7 +3,7 @@
 
 use std::str::FromStr;
 
-use clap::{Parser, Subcommand};
+use clap::{CommandFactory, Parser, Subcommand};
 use iota_sdk::{
     client::request_funds_from_faucet,
     types::{
@@ -37,6 +37,13 @@ pub struct AccountCli {
     pub command: AccountCommand,
 }
 
+impl AccountCli {
+    pub fn print_help() -> Result<(), Error> {
+        Self::command().bin_name("Account:").print_help()?;
+        Ok(())
+    }
+}
+
 #[derive(Debug, Subcommand)]
 #[allow(clippy::large_enum_variant)]
 pub enum AccountCommand {

cli/src/command/wallet.rs

@@ -3,7 +3,7 @@
 
 use std::path::Path;
 
-use clap::{builder::BoolishValueParser, Args, Parser, Subcommand};
+use clap::{builder::BoolishValueParser, Args, CommandFactory, Parser, Subcommand};
 use iota_sdk::{
     client::{
         constants::SHIMMER_COIN_TYPE,
@@ -44,6 +44,13 @@ pub struct WalletCli {
     pub command: Option<WalletCommand>,
 }
 
+impl WalletCli {
+    pub fn print_help() -> Result<(), Error> {
+        Self::command().bin_name("wallet").print_help()?;
+        Ok(())
+    }
+}
+
 #[derive(Debug, Clone, Subcommand)]
 pub enum WalletCommand {
     /// List all accounts.

cli/src/helper.rs

@@ -4,7 +4,6 @@
 use std::path::Path;
 
 use chrono::{DateTime, NaiveDateTime, Utc};
-use clap::Parser;
 use dialoguer::{console::Term, theme::ColorfulTheme, Input, Select};
 use iota_sdk::{
     client::{utils::Password, verify_mnemonic},
@@ -17,11 +16,7 @@ use tokio::{
 };
 use zeroize::Zeroize;
 
-use crate::{
-    command::{account::AccountCli, wallet::WalletCli},
-    error::Error,
-    println_log_error, println_log_info,
-};
+use crate::{error::Error, println_log_error, println_log_info};
 
 const DEFAULT_MNEMONIC_FILE_PATH: &str = "./mnemonic.txt";
 
@@ -90,18 +85,6 @@ pub async fn pick_account(wallet: &Wallet) -> Result<Option<Account>, Error> {
     }
 }
 
-pub fn print_wallet_help() {
-    if let Err(err) = WalletCli::try_parse_from(["Wallet:", "help"]) {
-        println!("{err}");
-    }
-}
-
-pub fn print_account_help() {
-    if let Err(err) = AccountCli::try_parse_from(["Account:", "help"]) {
-        println!("{err}");
-    }
-}
-
 pub async fn bytes_from_hex_or_file(hex: Option<String>, file: Option<String>) -> Result<Option<Vec<u8>>, Error> {
     Ok(if let Some(hex) = hex {
         Some(prefix_hex::decode(hex).map_err(|e| Error::Miscellaneous(e.to_string()))?)

cli/src/wallet.rs

@@ -12,7 +12,7 @@ use crate::{
         restore_command, set_node_url_command, sync_command, unlock_wallet, InitParameters, WalletCli, WalletCommand,
     },
     error::Error,
-    helper::{get_account_alias, get_decision, get_password, pick_account, print_wallet_help},
+    helper::{get_account_alias, get_decision, get_password, pick_account},
     println_log_error, println_log_info,
 };
 
@@ -92,7 +92,7 @@ pub async fn new_wallet(cli: WalletCli) -> Result<(Option<Wallet>, Option<Accoun
                     println_log_info!("Created new wallet.");
                     create_initial_account(wallet).await?
                 } else {
-                    print_wallet_help();
+                    WalletCli::print_help()?;
                     (None, None)
                 }
             }