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use crate::traverse::{EntryData, Tree, TreeIndex};
use byte_unit::{n_gb_bytes, n_gib_bytes, n_mb_bytes, n_mib_bytes, ByteUnit};
use std::{fmt, path::Path};
pub fn get_entry_or_panic(tree: &Tree, node_idx: TreeIndex) -> &EntryData {
tree.node_weight(node_idx)
.expect("node should always be retrievable with valid index")
}
pub(crate) fn get_size_or_panic(tree: &Tree, node_idx: TreeIndex) -> u64 {
get_entry_or_panic(tree, node_idx).size
}
/// Specifies a way to format bytes
#[derive(Clone, Copy)]
pub enum ByteFormat {
/// metric format, based on 1000.
Metric,
/// binary format, based on 1024
Binary,
/// raw bytes, without additional formatting
Bytes,
/// only gigabytes without smart-unit
GB,
/// only gibibytes without smart-unit
GiB,
/// only megabytes without smart-unit
MB,
/// only mebibytes without smart-unit
MiB,
}
impl ByteFormat {
pub fn width(self) -> usize {
use ByteFormat::*;
match self {
Metric | Binary => 10,
Bytes => 12,
MiB | MB => 12,
_ => 10,
}
}
pub fn total_width(self) -> usize {
use ByteFormat::*;
const THE_SPACE_BETWEEN_UNIT_AND_NUMBER: usize = 1;
self.width()
+ match self {
Binary | MiB | GiB => 3,
Metric | MB | GB => 2,
Bytes => 1,
}
+ THE_SPACE_BETWEEN_UNIT_AND_NUMBER
}
pub fn display(self, bytes: u64) -> ByteFormatDisplay {
ByteFormatDisplay {
format: self,
bytes,
}
}
}
pub struct ByteFormatDisplay {
format: ByteFormat,
bytes: u64,
}
impl fmt::Display for ByteFormatDisplay {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
use byte_unit::Byte;
use ByteFormat::*;
let format = match self.format {
Bytes => return write!(f, "{} b", self.bytes),
Binary => (true, None),
Metric => (false, None),
GB => (false, Some((n_gb_bytes!(1), ByteUnit::GB))),
GiB => (false, Some((n_gib_bytes!(1), ByteUnit::GiB))),
MB => (false, Some((n_mb_bytes!(1), ByteUnit::MB))),
MiB => (false, Some((n_mib_bytes!(1), ByteUnit::MiB))),
};
let b = match format {
(_, Some((divisor, unit))) => Byte::from_unit(self.bytes as f64 / divisor as f64, unit)
.expect("byte count > 0")
.get_adjusted_unit(unit),
(binary, None) => Byte::from_bytes(u128::from(self.bytes)).get_appropriate_unit(binary),
}
.format(2);
let mut splits = b.split(' ');
match (splits.next(), splits.next()) {
(Some(bytes), Some(unit)) => write!(
f,
"{} {:>unit_width$}",
bytes,
unit,
unit_width = match self.format {
Binary => 3,
Metric => 2,
_ => 2,
}
),
_ => f.write_str(&b),
}
}
}
/// Identify the kind of sorting to apply during filesystem iteration
#[derive(Clone)]
pub enum TraversalSorting {
None,
AlphabeticalByFileName,
}
/// Specify the kind of color to use
#[derive(Clone, Copy)]
pub enum Color {
/// Use no color
None,
/// Use terminal colors
Terminal,
}
pub(crate) struct DisplayColor<C> {
kind: Color,
color: C,
}
impl Color {
pub(crate) fn display<C>(self, color: C) -> DisplayColor<C> {
DisplayColor { kind: self, color }
}
}
impl<C> fmt::Display for DisplayColor<C>
where
C: fmt::Display,
{
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match self.kind {
Color::None => Ok(()),
Color::Terminal => self.color.fmt(f),
}
}
}
/// Configures a filesystem walk, including output and formatting options.
#[derive(Clone)]
pub struct WalkOptions {
/// The amount of threads to use. Refer to [`WalkDir::num_threads()`](https://docs.rs/jwalk/0.4.0/jwalk/struct.WalkDir.html#method.num_threads)
/// for more information.
pub threads: usize,
pub byte_format: ByteFormat,
pub count_hard_links: bool,
pub apparent_size: bool,
pub color: Color,
pub sorting: TraversalSorting,
}
type WalkDir = jwalk::WalkDirGeneric<((), Option<Result<std::fs::Metadata, jwalk::Error>>)>;
impl WalkOptions {
pub(crate) fn iter_from_path(&self, path: &Path) -> WalkDir {
WalkDir::new(path)
.follow_links(false)
.sort(match self.sorting {
TraversalSorting::None => false,
TraversalSorting::AlphabeticalByFileName => true,
})
.skip_hidden(false)
.process_read_dir(|_, dir_entry_results| {
dir_entry_results.iter_mut().for_each(|dir_entry_result| {
if let Ok(dir_entry) = dir_entry_result {
dir_entry.client_state = Some(dir_entry.metadata());
}
})
})
.parallelism(match self.threads {
0 => jwalk::Parallelism::RayonDefaultPool,
1 => jwalk::Parallelism::Serial,
_ => jwalk::Parallelism::RayonNewPool(self.threads),
})
}
}
/// Information we gather during a filesystem walk
#[derive(Default)]
pub struct WalkResult {
/// The amount of io::errors we encountered. Can happen when fetching meta-data, or when reading the directory contents.
pub num_errors: u64,
}
impl WalkResult {
pub fn to_exit_code(&self) -> i32 {
if self.num_errors > 0 {
1
} else {
0
}
}
}
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