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//! File and I/O utilities
use std::path::Path;
use anyhow::{Context, bail};
use tokio::fs;
/// Wait for user to respond with yes or no
/// This returns `false` if reading from stdin fails
pub async fn wait_for_confirm(prompt: &str) -> bool {
const DEFAULT: bool = true;
let prompt = prompt.to_owned();
tokio::task::spawn_blocking(move || {
let stdin = std::io::stdin();
loop {
let mut s = String::new();
print!("{prompt}");
if DEFAULT {
println!(" [Y/n]");
} else {
println!(" [y/N]");
}
stdin.read_line(&mut s).context("Failed to read line")?;
match s.trim().to_ascii_lowercase().as_str() {
"" => break Ok::<bool, anyhow::Error>(DEFAULT),
"y" | "ye" | "yes" => break Ok(true),
"n" | "no" => break Ok(false),
_ => (),
}
}
})
.await
.unwrap()
.unwrap_or(false)
}
/// Wait for user to respond with any input, ignoring empty responses
pub async fn wait_for_input(prompt: &str) -> anyhow::Result<String> {
let prompt = prompt.to_owned();
tokio::task::spawn_blocking(move || {
let stdin = std::io::stdin();
loop {
let mut s = String::new();
println!("{prompt}");
let n = stdin.read_line(&mut s).context("Failed to read line")?;
if n == 0 {
bail!("stdin reached EOF");
}
match s.trim().to_ascii_lowercase().as_str() {
"" => continue,
input => break Ok(input.to_owned()),
}
}
})
.await
.unwrap()
}
/// Recursively create directories and write to 'file'
pub async fn create_dir_and_write(
path: impl AsRef<Path>,
contents: impl AsRef<[u8]>,
) -> anyhow::Result<()> {
let path = path.as_ref();
let parent_dir = path.parent().context("Missing parent directory")?;
fs::create_dir_all(parent_dir)
.await
.context("Failed to create directories")?;
fs::write(path, contents)
.await
.with_context(|| format!("Failed to write to {}", path.display()))?;
Ok(())
}
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