feat: allow input of credentials from stdin (#185)

* feat: allow credential input from stdin for registration

This changes the options for register to be optional. If arguments are
not given, the program will ask for them interactively.

* feat: allow credential input from stdin for login

* style: apply cargo fmt

src/command/login.rs

@@ -1,3 +1,4 @@
+use std::io;
 use std::io::prelude::*;
 use std::{borrow::Cow, fs::File};
 
@@ -12,13 +13,19 @@ use atuin_client::settings::Settings;
 #[structopt(setting(structopt::clap::AppSettings::DeriveDisplayOrder))]
 pub struct Cmd {
     #[structopt(long, short)]
-    pub username: String,
+    pub username: Option<String>,
 
     #[structopt(long, short)]
-    pub password: String,
+    pub password: Option<String>,
 
     #[structopt(long, short, about = "the encryption key for your account")]
-    pub key: String,
+    pub key: Option<String>,
+}
+
+fn get_input() -> Result<String> {
+    let mut input = String::new();
+    io::stdin().read_line(&mut input)?;
+    Ok(input.trim_end_matches(&['\r', '\n'][..]).to_string())
 }
 
 impl Cmd {
@@ -33,11 +40,33 @@ impl Cmd {
             return Ok(());
         }
 
+        // TODO: Maybe get rid of clone
+        let username = if let Some(username) = self.username.clone() {
+            username
+        } else {
+            eprint!("Please enter username: ");
+            get_input().expect("Failed to read username from input")
+        };
+
+        let password = if let Some(password) = self.password.clone() {
+            password
+        } else {
+            eprint!("Please enter password: ");
+            get_input().expect("Failed to read email from input")
+        };
+
+        let key = if let Some(key) = self.key.clone() {
+            key
+        } else {
+            eprint!("Please enter encryption key: ");
+            get_input().expect("Failed to read password from input")
+        };
+
         let session = api_client::login(
             settings.sync_address.as_str(),
             LoginRequest {
-                username: Cow::Borrowed(&self.username),
-                password: Cow::Borrowed(&self.password),
+                username: Cow::Borrowed(&username),
+                password: Cow::Borrowed(&password),
             },
         )?;
 
@@ -47,7 +76,7 @@ impl Cmd {
 
         let key_path = settings.key_path.as_str();
         let mut file = File::create(key_path)?;
-        file.write_all(self.key.as_bytes())?;
+        file.write_all(key.as_bytes())?;
 
         println!("Logged in!");
 

src/command/mod.rs

@@ -147,12 +147,7 @@ impl AtuinCmd {
                 logout::run();
                 Ok(())
             }
-            Self::Register(r) => register::run(
-                &client_settings,
-                r.username.as_str(),
-                r.email.as_str(),
-                r.password.as_str(),
-            ),
+            Self::Register(r) => register::run(&client_settings, r.username, r.email, r.password),
             Self::Key => {
                 let key = atuin_client::encryption::load_key(&client_settings)?;
                 println!("{}", atuin_client::encryption::encode_key(key)?);

src/command/register.rs

@@ -1,4 +1,5 @@
 use std::fs::File;
+use std::io;
 use std::io::prelude::*;
 
 use eyre::Result;
@@ -11,17 +12,54 @@ use atuin_client::settings::Settings;
 #[structopt(setting(structopt::clap::AppSettings::DeriveDisplayOrder))]
 pub struct Cmd {
     #[structopt(long, short)]
-    pub username: String,
+    pub username: Option<String>,
 
     #[structopt(long, short)]
-    pub email: String,
+    pub email: Option<String>,
 
     #[structopt(long, short)]
-    pub password: String,
+    pub password: Option<String>,
 }
 
-pub fn run(settings: &Settings, username: &str, email: &str, password: &str) -> Result<()> {
-    let session = api_client::register(settings.sync_address.as_str(), username, email, password)?;
+fn get_input() -> Result<String> {
+    let mut input = String::new();
+    io::stdin().read_line(&mut input)?;
+    Ok(input.trim_end_matches(&['\r', '\n'][..]).to_string())
+}
+
+pub fn run(
+    settings: &Settings,
+    username: Option<String>,
+    email: Option<String>,
+    password: Option<String>,
+) -> Result<()> {
+    let username = if let Some(username) = username {
+        username
+    } else {
+        eprint!("Please enter username: ");
+        get_input().expect("Failed to read username from input")
+    };
+
+    let email = if let Some(email) = email {
+        email
+    } else {
+        eprint!("Please enter email: ");
+        get_input().expect("Failed to read email from input")
+    };
+
+    let password = if let Some(password) = password {
+        password
+    } else {
+        eprint!("Please enter password: ");
+        get_input().expect("Failed to read password from input")
+    };
+
+    let session = api_client::register(
+        settings.sync_address.as_str(),
+        username.as_str(),
+        email.as_str(),
+        password.as_str(),
+    )?;
 
     let path = settings.session_path.as_str();
     let mut file = File::create(path)?;