purple-ssh 3.15.10

Open-source terminal SSH manager that keeps ~/.ssh/config in sync with your cloud infra. Spin up a VM on AWS, GCP, Azure, Hetzner or 12 other cloud providers and it appears in your host list. Destroy it and the entry dims. Search hundreds of hosts, transfer files, manage Docker and Podman over SSH, sign Vault SSH certs. Rust TUI, MIT licensed.
Documentation 
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//! Tunnel-related user-facing strings: tunnel list management, tunnel
//! form validation, tunnel lifecycle toasts.

// ── Form validation (TunnelForm) ────────────────────────────────────

pub const TUNNEL_BIND_PORT_INVALID: &str = "Bind port must be 1-65535.";
pub const TUNNEL_BIND_PORT_ZERO: &str = "Bind port can't be 0.";
pub const TUNNEL_REMOTE_HOST_EMPTY: &str = "Remote host can't be empty.";
pub const TUNNEL_REMOTE_HOST_SPACES: &str = "Remote host can't contain spaces.";
pub const TUNNEL_REMOTE_PORT_INVALID: &str = "Remote port must be 1-65535.";
pub const TUNNEL_REMOTE_PORT_ZERO: &str = "Remote port can't be 0.";

/// Short form of `field_control_chars` used by TunnelForm where the
/// toast is purely informational and does not need the guidance suffix.
pub fn field_control_chars_short(name: &str) -> String {
    format!("{} contains control characters.", name)
}

// ── Tunnels ─────────────────────────────────────────────────────────

pub const TUNNEL_REMOVED: &str = "Tunnel removed.";
pub const TUNNEL_SAVED: &str = "Tunnel saved.";
pub const TUNNEL_NOT_FOUND: &str = "Tunnel not found in config.";
pub const TUNNEL_INCLUDED_READ_ONLY: &str = "Included host. Tunnels are read-only.";
pub const TUNNEL_ORIGINAL_NOT_FOUND: &str = "Original tunnel not found in config.";
pub const TUNNEL_LIST_CHANGED: &str = "Tunnel list changed externally. Press Esc and re-open.";
pub const TUNNEL_DUPLICATE: &str = "Duplicate tunnel already configured.";
pub const TUNNEL_NO_EDITABLE_HOSTS: &str = "No editable hosts. Add a host first.";
pub const TUNNEL_HOST_PICKER_NO_MATCH: &str = "No matches.";

pub fn tunnel_stopped(alias: &str) -> String {
    format!("Tunnel for {} stopped.", alias)
}

pub fn tunnel_started(alias: &str) -> String {
    format!("Tunnel for {} started.", alias)
}

pub fn tunnel_start_failed(e: &impl std::fmt::Display) -> String {
    format!("Failed to start tunnel: {}", e)
}