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use crate::{crossdev, ByteFormat, InodeFilter, Throttle, WalkOptions, WalkResult};
use anyhow::Result;
use filesize::PathExt;
use owo_colors::{AnsiColors as Color, OwoColorize};
use std::time::Duration;
use std::{io, path::Path};
/// Aggregate the given `paths` and write information about them to `out` in a human-readable format.
/// If `compute_total` is set, it will write an additional line with the total size across all given `paths`.
/// If `sort_by_size_in_bytes` is set, we will sort all sizes (ascending) before outputting them.
pub fn aggregate(
mut out: impl io::Write,
mut err: Option<impl io::Write>,
walk_options: WalkOptions,
compute_total: bool,
sort_by_size_in_bytes: bool,
byte_format: ByteFormat,
paths: impl IntoIterator<Item = impl AsRef<Path>>,
) -> Result<(WalkResult, Statistics)> {
let mut res = WalkResult::default();
let mut stats = Statistics {
smallest_file_in_bytes: u128::max_value(),
..Default::default()
};
let mut total = 0;
let mut num_roots = 0;
let mut aggregates = Vec::new();
let mut inodes = InodeFilter::default();
let progress = Throttle::new(Duration::from_millis(100), Duration::from_secs(1).into());
for path in paths.into_iter() {
num_roots += 1;
let mut num_bytes = 0u128;
let mut num_errors = 0u64;
let device_id = match crossdev::init(path.as_ref()) {
Ok(id) => id,
Err(_) => {
num_errors += 1;
res.num_errors += 1;
aggregates.push((path.as_ref().to_owned(), num_bytes, num_errors));
continue;
}
};
for entry in walk_options.iter_from_path(path.as_ref(), device_id, false) {
stats.entries_traversed += 1;
progress.throttled(|| {
if let Some(err) = err.as_mut() {
write!(err, "Enumerating {} items\r", stats.entries_traversed).ok();
}
});
match entry {
Ok(entry) => {
let file_size = match entry.client_state {
Some(Ok(ref m))
if !m.is_dir()
&& (walk_options.count_hard_links || inodes.add(m))
&& (walk_options.cross_filesystems
|| crossdev::is_same_device(device_id, m)) =>
{
if walk_options.apparent_size {
m.len()
} else {
entry.path().size_on_disk_fast(m).unwrap_or_else(|_| {
num_errors += 1;
0
})
}
}
Some(Ok(_)) => 0,
Some(Err(_)) => {
num_errors += 1;
0
}
None => 0, // ignore directory
} as u128;
stats.largest_file_in_bytes = stats.largest_file_in_bytes.max(file_size);
stats.smallest_file_in_bytes = stats.smallest_file_in_bytes.min(file_size);
num_bytes += file_size;
}
Err(_) => num_errors += 1,
}
}
if let Some(err) = err.as_mut() {
write!(err, "\x1b[2K\r").ok();
}
if sort_by_size_in_bytes {
aggregates.push((path.as_ref().to_owned(), num_bytes, num_errors));
} else {
output_colored_path(
&mut out,
&path,
num_bytes,
num_errors,
path_color_of(&path),
byte_format,
)?;
}
total += num_bytes;
res.num_errors += num_errors;
}
if stats.entries_traversed == 0 {
stats.smallest_file_in_bytes = 0;
}
if sort_by_size_in_bytes {
aggregates.sort_by_key(|&(_, num_bytes, _)| num_bytes);
for (path, num_bytes, num_errors) in aggregates.into_iter() {
output_colored_path(
&mut out,
&path,
num_bytes,
num_errors,
path_color_of(&path),
byte_format,
)?;
}
}
if num_roots > 1 && compute_total {
output_colored_path(
&mut out,
Path::new("total"),
total,
res.num_errors,
None,
byte_format,
)?;
}
Ok((res, stats))
}
fn path_color_of(path: impl AsRef<Path>) -> Option<Color> {
(!path.as_ref().is_file()).then_some(Color::Cyan)
}
fn output_colored_path(
out: &mut impl io::Write,
path: impl AsRef<Path>,
num_bytes: u128,
num_errors: u64,
path_color: Option<Color>,
byte_format: ByteFormat,
) -> std::result::Result<(), io::Error> {
let size = byte_format.display(num_bytes).to_string();
let size = size.green();
let size_width = byte_format.width();
let path = path.as_ref().display();
let errors = (num_errors != 0)
.then(|| {
let plural_s = if num_errors > 1 { "s" } else { "" };
format!(" <{num_errors} IO Error{plural_s}>")
})
.unwrap_or_default();
if let Some(color) = path_color {
writeln!(out, "{size:>size_width$} {}{errors}", path.color(color))
} else {
writeln!(out, "{size:>size_width$} {path}{errors}")
}
}
/// Statistics obtained during a filesystem walk
#[derive(Default, Debug)]
pub struct Statistics {
/// The amount of entries we have seen during filesystem traversal
pub entries_traversed: u64,
/// The size of the smallest file encountered in bytes
pub smallest_file_in_bytes: u128,
/// The size of the largest file encountered in bytes
pub largest_file_in_bytes: u128,
}
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