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use anyhow::{Context, Result}; |
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use crossterm::event::{self, Event, KeyCode}; |
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use ratatui::style::Style; |
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use ratatui::text::{Line, Span}; |
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use ratatui::widgets::Paragraph; |
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use std::process::Command; |
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use sysop_tui::{Footer, GlobalAction, classify, hint, layout, palette, selection, style}; |
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|
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#[derive(Debug, Clone, Copy, PartialEq, Eq)] |
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pub enum State { |
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Online, |
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Degraded, |
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Faulted, |
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Offline, |
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Unavail, |
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Suspended, |
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} |
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|
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impl State { |
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fn parse(s: &str) -> Self { |
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match s { |
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"ONLINE" => State::Online, |
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"DEGRADED" => State::Degraded, |
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"FAULTED" => State::Faulted, |
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"OFFLINE" => State::Offline, |
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"UNAVAIL" => State::Unavail, |
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"SUSPENDED" => State::Suspended, |
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_ => State::Faulted, |
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} |
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} |
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|
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fn label(&self) -> &'static str { |
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match self { |
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State::Online => "ONLINE", |
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State::Degraded => "DEGRADED", |
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State::Faulted => "FAULTED", |
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State::Offline => "OFFLINE", |
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State::Unavail => "UNAVAIL", |
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State::Suspended => "SUSPENDED", |
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} |
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} |
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|
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fn span(&self) -> Span<'static> { |
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match self { |
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State::Online => style::ok(self.label()), |
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State::Degraded => style::warn(self.label()), |
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State::Faulted | State::Unavail | State::Suspended => style::fault(self.label()), |
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State::Offline => style::inactive(self.label()), |
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} |
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} |
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|
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fn is_healthy(&self) -> bool { |
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matches!(self, State::Online) |
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} |
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} |
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|
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#[derive(Debug, Clone)] |
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pub struct Pool { |
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pub name: String, |
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pub state: State, |
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pub size: String, |
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pub alloc: String, |
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pub capacity_pct: String, |
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} |
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|
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pub trait Backend { |
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fn list(&self) -> Result<Vec<Pool>>; |
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} |
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|
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fn detect() -> Box<dyn Backend> { |
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if Zfs.probe().is_ok() { |
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Box::new(Zfs) |
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} else { |
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Box::new(Mock) |
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} |
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} |
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|
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struct Zfs; |
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|
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impl Zfs { |
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fn probe(&self) -> Result<()> { |
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let out = Command::new("zpool") |
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.arg("-V") |
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.output() |
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.context("invoke zpool")?; |
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if out.status.success() { |
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Ok(()) |
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} else { |
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anyhow::bail!("zpool unresponsive") |
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} |
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} |
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} |
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|
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impl Backend for Zfs { |
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fn list(&self) -> Result<Vec<Pool>> { |
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let out = Command::new("zpool") |
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.args(["list", "-H", "-o", "name,health,size,alloc,capacity"]) |
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.output() |
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.context("zpool list")?; |
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if !out.status.success() { |
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anyhow::bail!("zpool list failed"); |
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} |
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let mut pools = Vec::new(); |
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for line in String::from_utf8_lossy(&out.stdout).lines() { |
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let cols: Vec<&str> = line.split('\t').collect(); |
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if cols.len() < 5 { |
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continue; |
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} |
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pools.push(Pool { |
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name: cols[0].to_string(), |
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state: State::parse(cols[1]), |
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size: cols[2].to_string(), |
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alloc: cols[3].to_string(), |
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capacity_pct: cols[4].to_string(), |
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}); |
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} |
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Ok(pools) |
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} |
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} |
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|
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struct Mock; |
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|
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impl Backend for Mock { |
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fn list(&self) -> Result<Vec<Pool>> { |
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Ok(vec![ |
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Pool { |
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name: "rpool".into(), |
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state: State::Online, |
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size: "476G".into(), |
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alloc: "62.1G".into(), |
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capacity_pct: "13%".into(), |
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}, |
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Pool { |
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name: "tank".into(), |
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state: State::Degraded, |
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size: "1.81T".into(), |
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alloc: "1.20T".into(), |
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capacity_pct: "66%".into(), |
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}, |
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]) |
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} |
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} |
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|
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pub fn run(summary: bool) -> Result<i32> { |
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let pools = detect().list()?; |
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|
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if summary { |
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let healthy = pools.iter().all(|p| p.state.is_healthy()); |
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println!("{}", if healthy { "ok" } else { "degraded" }); |
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return Ok(0); |
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} |
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|
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let mut terminal = ratatui::init(); |
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let result = event_loop(&mut terminal, &pools); |
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ratatui::restore(); |
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result.map(|_| 0) |
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} |
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|
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fn event_loop(terminal: &mut ratatui::DefaultTerminal, pools: &[Pool]) -> Result<()> { |
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let mut selected: usize = 0; |
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let footer = Footer::new([hint("j/k", "move"), hint("q", "quit")]); |
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loop { |
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terminal.draw(|frame| { |
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let [body, foot] = layout::split(frame.area()); |
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frame.render_widget(list_widget(pools, selected), body); |
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frame.render_widget(&footer, foot); |
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})?; |
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|
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let Event::Key(key) = event::read()? else { |
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continue; |
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}; |
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match classify(key) { |
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GlobalAction::Quit => return Ok(()), |
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GlobalAction::Passthrough => match key.code { |
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KeyCode::Char('j') | KeyCode::Down if selected + 1 < pools.len() => { |
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selected += 1; |
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} |
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KeyCode::Char('k') | KeyCode::Up => { |
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selected = selected.saturating_sub(1); |
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} |
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_ => {} |
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}, |
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_ => {} |
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} |
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} |
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} |
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|
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fn list_widget(pools: &[Pool], selected: usize) -> Paragraph<'_> { |
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let name_w = pools.iter().map(|p| p.name.len()).max().unwrap_or(0).max(4); |
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let lines: Vec<Line> = pools |
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.iter() |
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.enumerate() |
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.map(|(i, p)| { |
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let is_sel = i == selected; |
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let marker = if is_sel { selection::MARKER } else { " " }; |
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let line = Line::from(vec![ |
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Span::raw(format!(" {marker} ")), |
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Span::raw(format!("{:<name_w$}", p.name)), |
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Span::raw(" "), |
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p.state.span(), |
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Span::raw(" "), |
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style::dim(format!( |
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"{} / {} ({})", |
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p.alloc, p.size, p.capacity_pct |
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)), |
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]); |
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if is_sel { |
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line.style(selection::selected_style()) |
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} else { |
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line |
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} |
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}) |
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.collect(); |
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Paragraph::new(lines).style(Style::default().bg(palette::BG).fg(palette::FG)) |
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} |
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|