When unset, ensure default root password in randomised

Cargo.lock

@@ -2255,6 +2255,7 @@ dependencies = [
  "hyper",
  "log",
  "once_cell",
+ "rand 0.8.5",
  "reqwest",
  "rmp-serde",
  "serde",

Cargo.toml

@@ -25,6 +25,7 @@ http = "0.2.7"
 hyper = "0.14.18"
 log = "0.4.17"
 once_cell = "1.10.0"
+rand = "0.8.5"
 reqwest = { version = "0.11.10", features = ["blocking"] }
 serde = { version = "1.0.137", features = ["derive"] }
 serde_cbor = "0.11.2"

src/cli/mod.rs

@@ -6,7 +6,13 @@ mod start;
 mod version;
 
 use clap::{Arg, Command};
+use once_cell::sync::Lazy;
+use rand::distributions::Alphanumeric;
+use rand::Rng;
 
+static PASS: Lazy<String> = Lazy::new(|| {
+	rand::thread_rng().sample_iter(&Alphanumeric).take(128).map(char::from).collect::<String>()
+});
 
 fn file_valid(v: &str) -> Result<(), String> {
 	if !v.is_empty() {
@@ -139,7 +145,7 @@ pub fn init() {
 					.short('p')
 					.long("pass")
 					.forbid_empty_values(true)
-					.default_value("root")
+					.default_value(PASS.as_str())
 					.help("The master password for the database"),
 			)
 			.arg(