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Avoid using time conversion methods that may panic (#5365)

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Tomoki Aonuma 2022-04-29 20:03:39 +09:00 committed by GitHub
parent b4f8798a3a
commit fa27110651
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 57 additions and 25 deletions
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70
crates/nu-command/src/filesystem/ls.rs
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@ -1,6 +1,6 @@
use crate::DirBuilder;
use crate::DirInfo;
use chrono::{DateTime, Local};
use chrono::{DateTime, Local, LocalResult, TimeZone, Utc};
use nu_engine::env::current_dir;
use nu_engine::CallExt;
use nu_path::expand_to_real_path;
@ -15,6 +15,7 @@ use pathdiff::diff_paths;
use std::os::unix::fs::PermissionsExt;
use std::path::PathBuf;
use std::sync::Arc;
use std::time::{SystemTime, UNIX_EPOCH};
#[derive(Clone)]
pub struct Ls;
@ -489,37 +490,46 @@ pub(crate) fn dir_entry_dict(
if let Some(md) = metadata {
if long {
cols.push("created".to_string());
{
let mut val = Value::nothing(span);
if let Ok(c) = md.created() {
let utc: DateTime<Local> = c.into();
vals.push(Value::Date {
val: utc.with_timezone(utc.offset()),
if let Some(local) = try_convert_to_local_date_time(c) {
val = Value::Date {
val: local.with_timezone(local.offset()),
span,
});
} else {
vals.push(Value::nothing(span));
};
}
}
vals.push(val);
}
cols.push("accessed".to_string());
{
let mut val = Value::nothing(span);
if let Ok(a) = md.accessed() {
let utc: DateTime<Local> = a.into();
vals.push(Value::Date {
val: utc.with_timezone(utc.offset()),
if let Some(local) = try_convert_to_local_date_time(a) {
val = Value::Date {
val: local.with_timezone(local.offset()),
span,
});
} else {
vals.push(Value::nothing(span));
};
}
}
vals.push(val);
}
}
cols.push("modified".to_string());
{
let mut val = Value::nothing(span);
if let Ok(m) = md.modified() {
let utc: DateTime<Local> = m.into();
vals.push(Value::Date {
val: utc.with_timezone(utc.offset()),
if let Some(local) = try_convert_to_local_date_time(m) {
val = Value::Date {
val: local.with_timezone(local.offset()),
span,
});
} else {
vals.push(Value::nothing(span));
};
}
}
vals.push(val);
}
} else {
if long {
@ -536,3 +546,25 @@ pub(crate) fn dir_entry_dict(
Ok(Value::Record { cols, vals, span })
}
fn try_convert_to_local_date_time(t: SystemTime) -> Option<DateTime<Local>> {
// Adapted from https://github.com/chronotope/chrono/blob/v0.4.19/src/datetime.rs#L755-L767.
let (sec, nsec) = match t.duration_since(UNIX_EPOCH) {
Ok(dur) => (dur.as_secs() as i64, dur.subsec_nanos()),
Err(e) => {
// unlikely but should be handled
let dur = e.duration();
let (sec, nsec) = (dur.as_secs() as i64, dur.subsec_nanos());
if nsec == 0 {
(-sec, 0)
} else {
(-sec - 1, 1_000_000_000 - nsec)
}
}
};
match Utc.timestamp_opt(sec, nsec) {
LocalResult::Single(t) => Some(t.with_timezone(&Local)),
_ => None,
}
}