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This PR contains the following updates:
0.4.23
->0.4.31
Release Notes
chronotope/chrono (chrono)
v0.4.31
: 0.4.31Compare Source
Another maintenance release.
It was not a planned effort to improve our support for UNIX timestamps, yet most PRs seem related to this.
Deprecations
timestamp_nanos
in favor of the non-panickingtimestamp_nanos_opt
(#1275)Additions
DateTime::<Utc>::from_timestamp
(#1279, thanks @demurgos)TimeZone::timestamp_micros
(#1285, thanks @emikitas)DateTime<Tz>::timestamp_nanos_opt
andNaiveDateTime::timestamp_nanos_opt
(#1275)UNIX_EPOCH
constants (#1291)Fixes
This makes many methods a little more strict:
NaiveTime::from_hms_milli
NaiveTime::from_hms_milli_opt
NaiveTime::from_hms_micro
NaiveTime::from_hms_micro_opt
NaiveTime::from_hms_nano
NaiveTime::from_hms_nano_opt
NaiveTime::from_num_seconds_from_midnight
NaiveTime::from_num_seconds_from_midnight_opt
NaiveDate::and_hms_milli
NaiveDate::and_hms_milli_opt
NaiveDate::and_hms_micro
NaiveDate::and_hms_micro_opt
NaiveDate::and_hms_nano
NaiveDate::and_hms_nano_opt
NaiveDateTime::from_timestamp
NaiveDateTime::from_timestamp_opt
TimeZone::timestamp
TimeZone::timestamp_opt
NaiveDateTime::timestamp_nanos_opt
(#1294, thanks @crepererum)Documentation
Internal
__doctest
feature anddoc_comment
dependency (#1276)actions/checkout
from 3 to 4 (#1280)NaiveDate::add_days
for small values (#1214)pure-rust-locales
to 0.7.0 (#1288, thanks @jeremija wo did good improvements onpure-rust-locales
)Thanks to all contributors on behalf of the chrono team, @djc and @pitdicker!
v0.4.30
: 0.4.30Compare Source
In this release, we have decided to swap out the
chrono::Duration
type (which has been a re-export of time 0.1Duration
type) with our own definition, which exposes a strict superset of thetime::Duration
API. This helps avoid warnings about the CVE-2020-26235 and RUSTSEC-2020-0071 advisories for downstream users and allows us to improve theDuration
API going forward.While this is technically a SemVer-breaking change, we expect the risk of downstream users experiencing actual incompatibility to be exceedingly limited (see our analysis of public code using a crater-like experiment), and not enough justification for the large ecosystem churn of a 0.5 release. If you have any feedback on these changes, please let us know in #1268.
Additions
NaiveDate::leap_year
(#1261)Documentation
Timelike::num_seconds_from_midnight
is a simple mapping (#1255)Relation between chrono and time 0.1
Rust first had a
time
module added tostd
in its 0.7 release. It later moved tolibextra
, and then to alibtime
library shipped alongside the standard library. In 2014 work on chrono started in order to provide a full-featured date and time library in Rust. Some improvements from chrono made it into the standard library; notably,chrono::Duration
was included asstd::time::Duration
(rust#15934) in 2014.In preparation of Rust 1.0 at the end of 2014
libtime
was moved out of the Rust distro and into thetime
crate to eventually be redesigned (rust#18832, rust#18858), like thenum
andrand
crates. Of course chrono kept its dependency on thistime
crate.time
started re-exportingstd::time::Duration
during this period. Later, the standard library was changed to have a more limited unsignedDuration
type (rust#24920, RFC 1040), while thetime
crate kept the full functionality withtime::Duration
.time::Duration
had been a part of chrono's public API.By 2016
time
0.1 lived under therust-lang-deprecated
organisation and was not actively maintained (time#136). chrono absorbed the platform functionality andDuration
type of thetime
crate in chrono#478 (the work started in chrono#286). In order to preserve compatibility with downstream crates depending ontime
andchrono
sharing aDuration
type, chrono kept depending on time 0.1. chrono offered the option to opt out of thetime
dependency by disabling theoldtime
feature (swapping it out for an effectively similar chrono type). In 2019, @jhpratt took over maintenance on thetime
crate and released what amounts to a new crate astime
0.2.Security advisories
In November of 2020 CVE-2020-26235 and RUSTSEC-2020-0071 were opened against the
time
crate. @quininer had found that calls tolocaltime_r
may be unsound (chrono#499). Eventually, almost a year later, this was also made into a security advisory against chrono as RUSTSEC-2020-0159, which had platform code similar totime
.On Unix-like systems a process is given a timezone id or description via the
TZ
environment variable. We need this timezone data to calculate the current local time from a value that is in UTC, such as the time from the system clock.time
0.1 and chrono used the POSIX functionlocaltime_r
to do the conversion to local time, which reads theTZ
variable.Rust assumes the environment to be writable and uses locks to access it from multiple threads. Some other programming languages and libraries use similar locking strategies, but these are typically not shared across languages. More importantly, POSIX declares modifying the environment in a multi-threaded process as unsafe, and
getenv
in libc can't be changed to take a lock because it returns a pointer to the data (see rust#27970 for more discussion).Since version 4.20 chrono no longer uses
localtime_r
, instead using Rust code to query the timezone (from theTZ
variable or viaiana-time-zone
as a fallback) and work with data from the system timezone database directly. The code for this was forked from the tz-rs crate by @x-hgg-x. As such, chrono now respects the Rust lock when reading theTZ
environment variable. In general, code should avoid modifying the environment.Removing time 0.1
Because time 0.1 has been unmaintained for years, however, the security advisory mentioned above has not been addressed. While chrono maintainers were careful not to break backwards compatibility with the
time::Duration
type, there has been a long stream of issues from users inquiring about the time 0.1 dependency with the vulnerability. We investigated the potential breakage of removing the time 0.1 dependency in chrono#1095 using a crater-like experiment and determined that the potential for breaking (public) dependencies is very low. We reached out to those few crates that did still depend on compatibility with time 0.1.As such, for chrono 0.4.30 we have decided to swap out the time 0.1
Duration
implementation for a local one that will offer a strict superset of the existing API going forward. This will prevent most downstream users from being affected by the security vulnerability in time 0.1 while minimizing the ecosystem impact of semver-incompatible version churn.Thanks to all contributors on behalf of the chrono team, @djc and @pitdicker!
v0.4.29
: 0.4.29Compare Source
This release fixes a panic introduced in chrono 0.4.27 in
FromStr<DateTime<Utc>>
(#1253).Chrono now has a Discord channel.
Fixes
parse_rfc3339_relaxed
(#1254)Deprecations
TimeZone::datetime_from_str
(#1251)Documentation
FromStr
forWeekday
andMonth
(#1226, thanks @wfraser)Internal improvements
i686
andwasm32-wasi
(#1237)This allows us to upgrade the criterion dependency to 5.1 without changing our MSRV.
Thanks to all contributors on behalf of the chrono team, @djc and @pitdicker!
v0.4.28
: 0.4.28Compare Source
This release fixes a test failure on 32-bit targets introduced with 0.4.27, see https://github.com/chronotope/chrono/issues/1234.
v0.4.27
: 0.4.27Compare Source
This release bumps the MSRV from 1.56 to 1.57. This allows us to take advantage of the panicking in const feature. In this release most methods on
NaiveDate
andNaiveTime
are made const,NaiveDateTime
and others will follow in a later release.The parser for the
%+
formatting specifier and theRFC3339
formatting item is switched from a strict to a relaxed parser (see https://github.com/chronotope/chrono/pull/1145). This matches the existing documentation, and the parser used byDateTime::from_str
. If you need to validate the input, consider usingDateTime::from_rfc3339
.Deprecations
DateTime::{from_local, from_utc}
(https://github.com/chronotope/chrono/pull/1175)Additions
DateTime::signed_duration_since
take argument withBorrow
(https://github.com/chronotope/chrono/pull/1119)PartialOrd
forMonth
(https://github.com/chronotope/chrono/pull/999, thanks @Munksgaard)Ord
andEq
for types which already derivePartialOrd
andPartialEq
(https://github.com/chronotope/chrono/pull/1128, thanks @totikom)FusedIterator
forNaiveDateDaysIterator
andNaiveDateWeeksIterator
(https://github.com/chronotope/chrono/pull/1134)NaiveDateDaysIterator
andNaiveDateWeeksIterator
public (https://github.com/chronotope/chrono/pull/1134)FromStr
forFixedOffset
(https://github.com/chronotope/chrono/pull/1157, thanks @mcronce)Tz::Offset: Display
requirement fromDateTime::to_rfc*
(https://github.com/chronotope/chrono/pull/1160)StrftimeItems
withunstable-locales
work without allocating (https://github.com/chronotope/chrono/pull/1152)NaiveDate::from_ymd_opt
const (https://github.com/chronotope/chrono/pull/1172, thanks @kamadorueda)Error
trait forParseWeekdayError
andParseMonthError
(https://github.com/chronotope/chrono/pull/539, thanks @mike-kfed)NaiveTime
const, update MSRV to 1.57 (https://github.com/chronotope/chrono/pull/1080)NaiveDate
const (https://github.com/chronotope/chrono/pull/1205)core::time::Duration
onDateTime
types (https://github.com/chronotope/chrono/pull/1229)Fixes
timestamp_nanos
panics on overflow in release builds (https://github.com/chronotope/chrono/pull/1123)offset_from_local_datetime
forwasm_bindgen
(https://github.com/chronotope/chrono/pull/1131)%s
to be a timestamp in UTC (https://github.com/chronotope/chrono/pull/1136)%#z
(https://github.com/chronotope/chrono/pull/1140, thanks @domodwyer)%c
and%r
(https://github.com/chronotope/chrono/pull/1165)unstable-locales
feature (https://github.com/chronotope/chrono/pull/1168)Offset
'sDebug
impl when serializingDateTime
(https://github.com/chronotope/chrono/pull/1035)NaiveTime::from_str
(https://github.com/chronotope/chrono/pull/1181)android-tzdata
if theclock
feature is not enabled (https://github.com/chronotope/chrono/pull/1220, thanks @AlexTMjugador)Documentation
NaiveTime
doc typo (https://github.com/chronotope/chrono/pull/1146, thanks @zachs18)Datelike::with_*
(https://github.com/chronotope/chrono/pull/1199)Utc::now
andLocal::now
(https://github.com/chronotope/chrono/pull/1192)Weekday::num_days_from_monday
(https://github.com/chronotope/chrono/pull/1193)Internal improvements
DateTime::to_rfc_*
optimizations (https://github.com/chronotope/chrono/pull/1200)format/formatting.rs
(https://github.com/chronotope/chrono/pull/1156)saturating_abs
(https://github.com/chronotope/chrono/pull/1124)Makefile
(https://github.com/chronotope/chrono/pull/1133)wasm-bindgen
feature (https://github.com/chronotope/chrono/pull/1131)try_verify_against_date_command
(https://github.com/chronotope/chrono/pull/1161)no_std
(https://github.com/chronotope/chrono/pull/1166)test_parse
(https://github.com/chronotope/chrono/pull/1170)#![deny(dead_code)]
(https://github.com/chronotope/chrono/pull/1187)test_date_extreme_offset
(https://github.com/chronotope/chrono/pull/1195)features-check
(https://github.com/chronotope/chrono/pull/1216)Thanks to all contributors on behalf of the chrono team, @djc and @pitdicker!
v0.4.26
: 0.4.26Compare Source
The changes from #807 we merged for 0.4.25 unfortunately restricted parsing in a way that was incompatible with earlier 0.4.x releases. We reverted this in #1113. A small amount of other changes were merged since.
DurationRound
panics from issue #1010 (#1093, thanks to @pitdicker)Thanks on behalf of the chrono team (@djc and @esheppa) to all contributors!
v0.4.25
: 0.4.25Compare Source
Time for another maintenance release. This release bumps the MSRV to 1.56; given MSRV bumps in chrono's dependencies (notably for syn 2), we felt that it no longer made sense to support any older versions. Feedback welcome in our issue tracker!
Additions
NaiveDateTime::and_utc()
method (#952, thanks to @klnusbaum)Hash
for most pub types that also derivePartialEq
(#938, thanks to @bruceg)parse_and_remainder()
methods (#1011, thanks to @pitdicker)DateTime::fix_offset()
(#1030, thanks to @pitdicker)#[track_caller]
toLocalResult::unwrap
(#1046, thanks to @pitdicker)#[must_use]
to some methods (#1007, thanks to @aceArt-GmbH)PartialOrd
forMonth
(#999, thanks to @Munksgaard)impl From<NaiveDateTime> for NaiveDate
(#1012, thanks to @pezcore)Fixes
NaiveWeek::last_day
(#1070, thanks to @pitdicker)Local
toFixedOffset
(#1041, thanks to @pitdicker)Refactoring
Local
(#992, thanks to @nekevss)Documentation
Internal improvements
clock
feature (#1061, thanks to @pitdicker)--no-default-features
(#1059, thanks to @pitdicker)bench_year_flags_from_year
from being optimized out (#1034, thanks to @pitdicker)test_datetime_parse_from_str
(#1078, thanks to @pitdicker)set -eux
, use bash (#1103, thanks to @jtmoon79)LANG
toc
in gnudate
(#1089, thanks to @scarf005)TryFrom
(#1086, thanks to @pitdicker)On behalf of @djc and @esheppa, thanks to all contributors!
v0.4.24
: 0.4.24Compare Source
This is a small maintenance release with accumulated fixes and improvements.
Days::new()
to refer to days, not months (#874, thanks to @brotskydotcom)from_timestamp_opt()
(#879, thanks to @xmo-odoo)format_localized()
forNaiveDate
(#881, thanks to @mseele)Add
/Sub
Days
, add tests with DST timezone (#878)NaiveTime::MIN
public (#890)from_timestamp_millis()
implementation and add more tests (#885)from_timestamp_micros()
function (#906, thanks to @umanwizard)Hash
for most pub types that also derivePartialEq
(#938, thanks to @bruceg)from_utc()
example (#939, thanks to @greg-el)DateTime::checked_add_days()
(#942, thanks to @Ekleog)FixedOffset
docs (#953, thanks to @klnusbaum)const
(#984, thanks to @tormeh)Thanks to all contributors from the chrono team, @esheppa and @djc.
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