OXYGENHUB
# 7bc302317004 oxygen / src / cli / ui.rs
3.1 KiB · Rust · last changed Pack merging above 16 packs; modern CLI presentation (colour, spinners, --plain, NO_COLOR); oxy prompt with manifest-based dirty check and docs/prompt.md 1 month ago source blame history raw
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//! Terminal presentation: colour, emphasis, and a live spinner while a
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//! command works. Everything degrades to plain text when stdout is not a
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//! terminal, when `NO_COLOR` is set, or with `--plain`.
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use console::{style, StyledObject, Term};
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use indicatif::{ProgressBar, ProgressStyle};
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::time::Duration;
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static PLAIN: AtomicBool = AtomicBool::new(false);
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static INIT: std::sync::Once = std::sync::Once::new();
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/// Decide once whether to use colour and animation.
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pub fn init(plain_flag: bool) {
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    INIT.call_once(|| {
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        let no_color = std::env::var_os("NO_COLOR").is_some();
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        let tty = Term::stdout().features().is_attended();
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        let plain = plain_flag || no_color || !tty;
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        PLAIN.store(plain, Ordering::Relaxed);
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        console::set_colors_enabled(!plain);
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    });
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}
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pub fn plain() -> bool {
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    PLAIN.load(Ordering::Relaxed)
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}
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fn s<T: std::fmt::Display>(v: T) -> StyledObject<T> {
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    style(v)
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}
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/// A ChangeId prefix.
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pub fn id<T: std::fmt::Display>(v: T) -> String {
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    s(v).cyan().bold().to_string()
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}
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/// A hash prefix.
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pub fn hash<T: std::fmt::Display>(v: T) -> String {
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    s(v).dim().to_string()
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}
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pub fn path<T: std::fmt::Display>(v: T) -> String {
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    s(v).bold().to_string()
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}
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pub fn ok<T: std::fmt::Display>(v: T) -> String {
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    s(v).green().to_string()
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}
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pub fn warn<T: std::fmt::Display>(v: T) -> String {
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    s(v).yellow().to_string()
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}
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pub fn err<T: std::fmt::Display>(v: T) -> String {
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    s(v).red().bold().to_string()
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}
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pub fn dim<T: std::fmt::Display>(v: T) -> String {
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    s(v).dim().to_string()
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}
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pub fn heading<T: std::fmt::Display>(v: T) -> String {
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    s(v).bold().underlined().to_string()
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}
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/// A status tag: green for additions, yellow for modifications, red for removals and conflicts.
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pub fn tag(t: &str) -> String {
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    match t {
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        "A" => s(t).green().bold().to_string(),
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        "M" | "X" => s(t).yellow().bold().to_string(),
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        "D" | "C!" => s(t).red().bold().to_string(),
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        "R" => s(t).cyan().bold().to_string(),
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        other => other.to_string(),
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    }
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}
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/// A live spinner with a message, shown only on a terminal. Drop or call
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/// `done` to clear it; `done` prints the final line in its place.
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pub struct Spinner {
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    bar: Option<ProgressBar>,
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}
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pub fn spinner(msg: &str) -> Spinner {
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    if plain() {
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        return Spinner { bar: None };
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    }
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    let bar = ProgressBar::new_spinner();
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    bar.set_style(ProgressStyle::with_template("{spinner:.cyan} {msg}").unwrap().tick_strings(&["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏", "✔"]));
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    bar.set_message(msg.to_string());
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    bar.enable_steady_tick(Duration::from_millis(80));
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    Spinner { bar: Some(bar) }
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}
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impl Spinner {
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    /// Replace the spinner with a final line (or print it plainly).
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    pub fn done(self, msg: &str) {
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        match &self.bar {
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            Some(b) => b.finish_with_message(msg.to_string()),
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            None => println!("{msg}"),
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        }
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    }
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    /// Clear the spinner without printing.
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    pub fn clear(self) {
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        if let Some(b) = &self.bar {
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            b.finish_and_clear();
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        }
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    }
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}