git_index/extension/
fs_monitor.rs

1use bstr::BString;
2
3use crate::{
4    extension::{FsMonitor, Signature},
5    util::{read_u32, read_u64, split_at_byte_exclusive},
6};
7
8#[derive(Clone)]
9pub enum Token {
10    V1 { nanos_since_1970: u64 },
11    V2 { token: BString },
12}
13
14pub const SIGNATURE: Signature = *b"FSMN";
15
16pub fn decode(data: &[u8]) -> Option<FsMonitor> {
17    let (version, data) = read_u32(data)?;
18    let (token, data) = match version {
19        1 => {
20            let (nanos_since_1970, data) = read_u64(data)?;
21            (Token::V1 { nanos_since_1970 }, data)
22        }
23        2 => {
24            let (token, data) = split_at_byte_exclusive(data, 0)?;
25            (Token::V2 { token: token.into() }, data)
26        }
27        _ => return None,
28    };
29
30    let (ewah_size, data) = read_u32(data)?;
31    let (entry_dirty, data) = git_bitmap::ewah::decode(&data[..ewah_size as usize]).ok()?;
32
33    if !data.is_empty() {
34        return None;
35    }
36
37    FsMonitor { token, entry_dirty }.into()
38}
git_index/extension/fs_monitor.rs

git_index/extension/
fs_monitor.rs
