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use crate::error::ErrorKind;
use crate::types::*;
use std::collections::BTreeMap;
use std::fmt::Debug;
use std::sync::Arc;
use std::{fmt, str};
pub(crate) struct Manifest {
pub files: BTreeMap<Vec<u8>, ManifestEntry>,
}
impl Debug for Manifest {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
write!(
fmt,
"Manifest(\nfiles:\n{}\n)",
self.files
.iter()
.map(|(key, value)| format!("{}: {:?}", str::from_utf8(&key).unwrap(), value))
.collect::<Vec<_>>()
.join("\n")
)
}
}
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct ManifestEntry {
pub id: NodeHash,
pub details: ManifestEntryDetails,
}
impl ManifestEntry {
fn parse(data: &[u8]) -> Result<ManifestEntry, ErrorKind> {
let (hash, flags) = data.split_at(40);
let id: NodeHash = str::from_utf8(hash).unwrap().parse().unwrap();
let details = if flags.is_empty() {
ManifestEntryDetails::File(FileType::Regular)
} else {
match flags[0] {
b'l' => ManifestEntryDetails::File(FileType::Symlink),
b'x' => ManifestEntryDetails::File(FileType::Executable),
b't' => ManifestEntryDetails::Tree,
unk => return Err(ErrorKind::Manifest(format!("Unknown flag {}", unk))),
}
};
Ok(ManifestEntry { id, details })
}
}
impl<'a> From<Arc<Vec<u8>>> for Manifest {
fn from(value: Arc<Vec<u8>>) -> Self {
let mut files = BTreeMap::new();
for line in value.split(|&x| x == b'\n') {
if line.is_empty() {
break;
}
let mut parts = line.splitn(2, |&x| x == 0);
if let (Some(file), Some(rest)) = (parts.next(), parts.next()) {
files.insert(file.into(), ManifestEntry::parse(rest).unwrap());
} else {
panic!();
}
}
Manifest { files }
}
}
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
pub enum ManifestEntryDetails {
File(FileType),
Tree,
}
impl fmt::Display for ManifestEntryDetails {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
ManifestEntryDetails::Tree => write!(f, "tree"),
ManifestEntryDetails::File(ft) => write!(f, "{}", ft),
}
}
}
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash, Ord, PartialOrd)]
pub enum FileType {
Regular,
Executable,
Symlink,
}
impl fmt::Display for FileType {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let s = match self {
FileType::Symlink => "symlink",
FileType::Executable => "executable",
FileType::Regular => "regular",
};
write!(f, "{}", s)
}
}