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use std::{
fs::File,
io::{BufRead, BufReader, Read, Seek},
path::{Path, PathBuf},
};
use chrono::prelude::*;
use chrono::Utc;
use directories::UserDirs;
use eyre::{eyre, Result};
use itertools::Itertools;
use super::{count_lines, Importer};
use crate::history::History;
#[derive(Debug)]
pub struct Zsh<R> {
file: BufReader<R>,
strbuf: String,
loc: usize,
counter: i64,
}
impl<R: Read + Seek> Zsh<R> {
fn new(r: R) -> Result<Self> {
let mut buf = BufReader::new(r);
let loc = count_lines(&mut buf)?;
Ok(Self {
file: buf,
strbuf: String::new(),
loc,
counter: 0,
})
}
}
impl Importer for Zsh<File> {
const NAME: &'static str = "zsh";
fn histpath() -> Result<PathBuf> {
let user_dirs = UserDirs::new().unwrap();
let home_dir = user_dirs.home_dir();
let mut candidates = [".zhistory", ".zsh_history"].iter();
loop {
match candidates.next() {
Some(candidate) => {
let histpath = home_dir.join(candidate);
if histpath.exists() {
break Ok(histpath);
}
}
None => break Err(eyre!("Could not find history file. Try setting $HISTFILE")),
}
}
}
fn parse(path: impl AsRef<Path>) -> Result<Self> {
Self::new(File::open(path)?)
}
}
impl<R: Read> Iterator for Zsh<R> {
type Item = Result<History>;
fn next(&mut self) -> Option<Self::Item> {
self.strbuf.clear();
match self.file.read_line(&mut self.strbuf) {
Ok(0) => return None,
Ok(_) => (),
Err(e) => return Some(Err(eyre!("failed to read line: {}", e))),
}
self.loc -= 1;
while self.strbuf.ends_with("\\\n") {
if self.file.read_line(&mut self.strbuf).is_err() {
break;
};
self.loc -= 1;
}
let extended = self.strbuf.starts_with(':');
if extended {
self.counter += 1;
Some(Ok(parse_extended(&self.strbuf, self.counter)))
} else {
let time = chrono::Utc::now();
let offset = chrono::Duration::seconds(self.counter);
let time = time - offset;
self.counter += 1;
Some(Ok(History::new(
time,
self.strbuf.trim_end().to_string(),
String::from("unknown"),
-1,
-1,
None,
None,
)))
}
}
fn size_hint(&self) -> (usize, Option<usize>) {
(0, Some(self.loc))
}
}
fn parse_extended(line: &str, counter: i64) -> History {
let line = line.replacen(": ", "", 2);
let (time, duration) = line.splitn(2, ':').collect_tuple().unwrap();
let (duration, command) = duration.splitn(2, ';').collect_tuple().unwrap();
let time = time
.parse::<i64>()
.unwrap_or_else(|_| chrono::Utc::now().timestamp());
let offset = chrono::Duration::milliseconds(counter);
let time = Utc.timestamp(time, 0);
let time = time + offset;
let duration = duration.parse::<i64>().map_or(-1, |t| t * 1_000_000_000);
History::new(
time,
command.trim_end().to_string(),
String::from("unknown"),
0,
duration,
None,
None,
)
}
#[cfg(test)]
mod test {
use std::io::Cursor;
use chrono::prelude::*;
use chrono::Utc;
use super::*;
#[test]
fn test_parse_extended_simple() {
let parsed = parse_extended(": 1613322469:0;cargo install atuin", 0);
assert_eq!(parsed.command, "cargo install atuin");
assert_eq!(parsed.duration, 0);
assert_eq!(parsed.timestamp, Utc.timestamp(1_613_322_469, 0));
let parsed = parse_extended(": 1613322469:10;cargo install atuin;cargo update", 0);
assert_eq!(parsed.command, "cargo install atuin;cargo update");
assert_eq!(parsed.duration, 10_000_000_000);
assert_eq!(parsed.timestamp, Utc.timestamp(1_613_322_469, 0));
let parsed = parse_extended(": 1613322469:10;cargo :b̷i̶t̴r̵o̴t̴ ̵i̷s̴ ̷r̶e̵a̸l̷", 0);
assert_eq!(parsed.command, "cargo :b̷i̶t̴r̵o̴t̴ ̵i̷s̴ ̷r̶e̵a̸l̷");
assert_eq!(parsed.duration, 10_000_000_000);
assert_eq!(parsed.timestamp, Utc.timestamp(1_613_322_469, 0));
let parsed = parse_extended(": 1613322469:10;cargo install \\n atuin\n", 0);
assert_eq!(parsed.command, "cargo install \\n atuin");
assert_eq!(parsed.duration, 10_000_000_000);
assert_eq!(parsed.timestamp, Utc.timestamp(1_613_322_469, 0));
}
#[test]
fn test_parse_file() {
let input = r": 1613322469:0;cargo install atuin
: 1613322469:10;cargo install atuin; \
cargo update
: 1613322469:10;cargo :b̷i̶t̴r̵o̴t̴ ̵i̷s̴ ̷r̶e̵a̸l̷
";
let cursor = Cursor::new(input);
let mut zsh = Zsh::new(cursor).unwrap();
assert_eq!(zsh.loc, 4);
assert_eq!(zsh.size_hint(), (0, Some(4)));
assert_eq!(&zsh.next().unwrap().unwrap().command, "cargo install atuin");
assert_eq!(
&zsh.next().unwrap().unwrap().command,
"cargo install atuin; \\\ncargo update"
);
assert_eq!(
&zsh.next().unwrap().unwrap().command,
"cargo :b̷i̶t̴r̵o̴t̴ ̵i̷s̴ ̷r̶e̵a̸l̷"
);
assert!(zsh.next().is_none());
assert_eq!(zsh.size_hint(), (0, Some(0)));
}
}