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inital commit, have algorithm for spacing commits down.

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Gabe Venberg 2024-02-09 10:13:30 -06:00
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22
Cargo.toml Normal file
View file

@ -0,0 +1,22 @@
[package]
name = "git-time-cheater"
version = "0.1.0"
edition = "2021"
license = "AGPL-3.0-or-later"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html,
[dependencies]
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proptest = "1.4.0"
rand = {version="0.8.5", features=["small_rng"]}
thiserror = "1.0.56"
tracing = "0.1.40"

660
LICENSE.md Normal file
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@ -0,0 +1,660 @@
# GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc.
<https://fsf.org/>
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non-consumer uses, unless such uses represent the only significant
mode of use of the product.
"Installation Information" for a User Product means any methods,
procedures, authorization keys, or other information required to
install and execute modified versions of a covered work in that User
Product from a modified version of its Corresponding Source. The
information must suffice to ensure that the continued functioning of
the modified object code is in no case prevented or interfered with
solely because modification has been made.
If you convey an object code work under this section in, or with, or
specifically for use in, a User Product, and the conveying occurs as
part of a transaction in which the right of possession and use of the
User Product is transferred to the recipient in perpetuity or for a
fixed term (regardless of how the transaction is characterized), the
Corresponding Source conveyed under this section must be accompanied
by the Installation Information. But this requirement does not apply
if neither you nor any third party retains the ability to install
modified object code on the User Product (for example, the work has
been installed in ROM).
The requirement to provide Installation Information does not include a
requirement to continue to provide support service, warranty, or
updates for a work that has been modified or installed by the
recipient, or for the User Product in which it has been modified or
installed. Access to a network may be denied when the modification
itself materially and adversely affects the operation of the network
or violates the rules and protocols for communication across the
network.
Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
documented (and with an implementation available to the public in
source code form), and must require no special password or key for
unpacking, reading or copying.
### 7. Additional Terms.
"Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law. If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.
When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
it. (Additional permissions may be written to require their own
removal in certain cases when you modify the work.) You may place
additional permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright permission.
Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders
of that material) supplement the terms of this License with terms:
- a) Disclaiming warranty or limiting liability differently from the
terms of sections 15 and 16 of this License; or
- b) Requiring preservation of specified reasonable legal notices or
author attributions in that material or in the Appropriate Legal
Notices displayed by works containing it; or
- c) Prohibiting misrepresentation of the origin of that material,
or requiring that modified versions of such material be marked in
reasonable ways as different from the original version; or
- d) Limiting the use for publicity purposes of names of licensors
or authors of the material; or
- e) Declining to grant rights under trademark law for use of some
trade names, trademarks, or service marks; or
- f) Requiring indemnification of licensors and authors of that
material by anyone who conveys the material (or modified versions
of it) with contractual assumptions of liability to the recipient,
for any liability that these contractual assumptions directly
impose on those licensors and authors.
All other non-permissive additional terms are considered "further
restrictions" within the meaning of section 10. If the Program as you
received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further
restriction, you may remove that term. If a license document contains
a further restriction but permits relicensing or conveying under this
License, you may add to a covered work material governed by the terms
of that license document, provided that the further restriction does
not survive such relicensing or conveying.
If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
additional terms that apply to those files, or a notice indicating
where to find the applicable terms.
Additional terms, permissive or non-permissive, may be stated in the
form of a separately written license, or stated as exceptions; the
above requirements apply either way.
### 8. Termination.
You may not propagate or modify a covered work except as expressly
provided under this License. Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).
However, if you cease all violation of this License, then your license
from a particular copyright holder is reinstated (a) provisionally,
unless and until the copyright holder explicitly and finally
terminates your license, and (b) permanently, if the copyright holder
fails to notify you of the violation by some reasonable means prior to
60 days after the cessation.
Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.
Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License. If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.
### 9. Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or run
a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
nothing other than this License grants you permission to propagate or
modify any covered work. These actions infringe copyright if you do
not accept this License. Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.
### 10. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License. You are not responsible
for enforcing compliance by third parties with this License.
An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations. If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License. For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.
### 11. Patents.
A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The
work thus licensed is called the contributor's "contributor version".
A contributor's "essential patent claims" are all patent claims owned
or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version. For
purposes of this definition, "control" includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.
Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.
In the following three paragraphs, a "patent license" is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement). To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.
If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients. "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within the
scope of its coverage, prohibits the exercise of, or is conditioned on
the non-exercise of one or more of the rights that are specifically
granted under this License. You may not convey a covered work if you
are a party to an arrangement with a third party that is in the
business of distributing software, under which you make payment to the
third party based on the extent of your activity of conveying the
work, and under which the third party grants, to any of the parties
who would receive the covered work from you, a discriminatory patent
license (a) in connection with copies of the covered work conveyed by
you (or copies made from those copies), or (b) primarily for and in
connection with specific products or compilations that contain the
covered work, unless you entered into that arrangement, or that patent
license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
### 12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under
this License and any other pertinent obligations, then as a
consequence you may not convey it at all. For example, if you agree to
terms that obligate you to collect a royalty for further conveying
from those to whom you convey the Program, the only way you could
satisfy both those terms and this License would be to refrain entirely
from conveying the Program.
### 13. Remote Network Interaction; Use with the GNU General Public License.
Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users
interacting with it remotely through a computer network (if your
version supports such interaction) an opportunity to receive the
Corresponding Source of your version by providing access to the
Corresponding Source from a network server at no charge, through some
standard or customary means of facilitating copying of software. This
Corresponding Source shall include the Corresponding Source for any
work covered by version 3 of the GNU General Public License that is
incorporated pursuant to the following paragraph.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the work with which it is combined will remain governed by version
3 of the GNU General Public License.
### 14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions
of the GNU Affero General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies that a certain numbered version of the GNU Affero General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU Affero General Public License, you may choose any version ever
published by the Free Software Foundation.
If the Program specifies that a proxy can decide which future versions
of the GNU Affero General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
### 15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
### 16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
### 17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
## How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.
To do so, attach the following notices to the program. It is safest to
attach them to the start of each source file to most effectively state
the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper
mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for
the specific requirements.
You should also get your employer (if you work as a programmer) or
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. For more information on this, and how to apply and follow
the GNU AGPL, see <https://www.gnu.org/licenses/>.

0
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use chrono::{NaiveDateTime, TimeZone};
use clap::Parser;
#[derive(Debug, Parser)]
#[command(author, version, about)]
pub(crate) struct Cli {
/// earliest time to place a commit, in format yyyy-mm-ddThh:mm:ss
pub(crate) start_time: NaiveDateTime,
/// latest time to place a commit, in format yyyy-mm-ddThh:mm:ss. Defaults to current time.
pub(crate) end_time: Option<NaiveDateTime>,
/// first commit to modify, will default to the first commit of the repo
#[arg(short, long)]
pub(crate) first_commit: Option<String>,
/// last commit to modify, will default to HEAD
#[arg(short, long)]
pub(crate) last_commit: Option<String>,
/// Timezone to place commits in, will default to local tz. Must be a Tz identifier as listed
/// on https://en.wikipedia.org/wiki/List_of_tz_database_time_zones. Defaults to local tz
#[arg(short, long)]
pub(crate) timezone: Option<chrono_tz::Tz>
}

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use thiserror;

26
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mod args;
mod err;
mod time;
use chrono::prelude::*;
use chrono_tz::Tz;
use clap::Parser;
fn main() {
let cli = args::Cli::parse();
println!("{:#?}", cli);
let start_time = match cli.timezone {
Some(tz) => tz.from_local_datetime(&cli.start_time).unwrap(),
None => get_local_timezone()
.expect("Could not get local timezone")
.from_local_datetime(&cli.start_time)
.unwrap(),
};
}
fn get_local_timezone() -> Result<Tz, String> {
match iana_time_zone::get_timezone() {
Ok(tz_string) => tz_string.parse(),
Err(e) => Err(e.to_string()),
}
}

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use chrono::{DateTime, Duration};
use rand::{rngs::SmallRng, Rng, SeedableRng};
/// A range of time represented by a start datetime and an end datetime.
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct TimeRange<Tz: chrono::TimeZone> {
pub start: DateTime<Tz>,
pub end: DateTime<Tz>,
}
impl<Tz: chrono::TimeZone> TimeRange<Tz> {
/// whether a time instance lies within the time range
pub fn is_in_range<Otz: chrono::TimeZone>(&self, other: &DateTime<Otz>) -> bool {
(self.start <= *other) && (other <= &self.end)
}
/// the time between the start and end of the time range.
pub fn duration(&self) -> Duration {
self.end.clone() - self.start.clone()
}
/// Distribute a number of events evenly across a time range.
pub fn distribute_evenly(&self, number: u32) -> Vec<DateTime<Tz>> {
let time_between_events = self.duration() / ((number) as i32);
let mut events = Vec::new();
for i in 0..number {
events.push(self.start.clone() + time_between_events * (i as i32))
}
events
}
/// Distribute a number of events evenly across a time range with a specific amount of jitter.
pub fn distribute_with_jitter(&self, number: u32, max_jitter: &Duration) -> Vec<DateTime<Tz>> {
let mut events = self.distribute_evenly(number);
if !Duration::is_zero(max_jitter) {
let mut rng = SmallRng::from_entropy();
for event in &mut events {
//make sure we dont exceed the bounds of the range even with jitter.
let min_offset = (self.start.clone() - event.clone()).num_seconds();
let max_offset = (self.end.clone() - event.clone()).num_seconds();
*event += Duration::seconds(rng.gen_range(
min_offset.max(-max_jitter.num_seconds())
..max_offset.min(max_jitter.num_seconds()),
))
}
events.sort();
}
events
}
}
/// Distribute a number of events across a set of time ranges evenly,
/// applying a specific amount of jitter.
pub fn distribute_across_ranges_with_jitter<Tz: chrono::TimeZone>(
ranges: &[TimeRange<Tz>],
number: u32,
max_jitter: &Duration,
) -> Vec<DateTime<Tz>> {
// compress all the time ranges into a single range
let total_duration: Duration = ranges
.iter()
.fold(Duration::zero(), |a, r| a + r.duration());
let compressed_time = TimeRange {
start: ranges[0].start.clone(),
end: ranges[0].start.clone() + total_duration,
};
// distribute events
let events = compressed_time.distribute_with_jitter(number, max_jitter);
// uncompress the compressed range back into the original set of ranges
let mut expanded_events = Vec::new();
for event in events {
let mut time_after_start = event - compressed_time.start.clone();
for region in ranges {
if time_after_start >= region.duration() {
time_after_start -= region.duration();
} else {
expanded_events.push(region.start.clone() + time_after_start);
break;
}
}
}
expanded_events
}
#[cfg(test)]
mod tests {
use chrono::{TimeZone, Utc};
use itertools::Itertools;
use super::*;
#[test]
fn test_distribute_evenly() {
let timerange = TimeRange::<chrono::Utc> {
start: Utc.with_ymd_and_hms(2024, 1, 1, 0, 0, 0).unwrap(),
end: Utc.with_ymd_and_hms(2024, 1, 2, 0, 0, 0).unwrap(),
};
// 12 events should be spaced every 2 hours.
let events = timerange.distribute_evenly(12);
println!("{:#?}", events);
assert_eq!(events.len(), 12);
for (a, b) in events.iter().tuple_windows() {
assert_eq!((*b - a).num_hours(), 2)
}
for event in events {
assert!(timerange.is_in_range(&event))
}
}
#[test]
fn test_distribute_with_jitter() {
let timerange = TimeRange::<chrono::Utc> {
start: Utc.with_ymd_and_hms(2024, 1, 1, 0, 0, 0).unwrap(),
end: Utc.with_ymd_and_hms(2024, 1, 2, 0, 0, 0).unwrap(),
};
let events = timerange.distribute_evenly(12);
let random_events = timerange.distribute_with_jitter(12, &Duration::minutes(30));
println!("{:#?}", random_events);
for (standard, jittered) in events.iter().zip(random_events.iter()) {
assert!((*standard - jittered).num_minutes().abs() <= 30);
}
for event in random_events {
assert!(timerange.is_in_range(&event))
}
}
#[test]
fn test_with_extreme_jitter() {
let timerange = TimeRange::<chrono::Utc> {
start: Utc.with_ymd_and_hms(2024, 1, 1, 0, 0, 0).unwrap(),
end: Utc.with_ymd_and_hms(2024, 1, 2, 0, 0, 0).unwrap(),
};
let events = timerange.distribute_with_jitter(12, &Duration::hours(48));
println!("{:#?}", events);
for event in events {
assert!(timerange.is_in_range(&event))
}
}
#[test]
fn test_distribute_across_ranges_without_jitter() {
let ranges = vec![
TimeRange::<chrono::Utc> {
start: Utc.with_ymd_and_hms(2024, 1, 1, 0, 0, 0).unwrap(),
end: Utc.with_ymd_and_hms(2024, 1, 2, 0, 0, 0).unwrap(),
},
TimeRange::<chrono::Utc> {
start: Utc.with_ymd_and_hms(2024, 1, 5, 0, 0, 0).unwrap(),
end: Utc.with_ymd_and_hms(2024, 1, 6, 0, 0, 0).unwrap(),
},
];
//
let events = distribute_across_ranges_with_jitter(&ranges, 24, &Duration::zero());
println!("{:#?}", events);
assert_eq!(events.len(), 24);
for event in events {
assert!(ranges.iter().any(|r| r.is_in_range(&event)))
}
}
#[test]
fn test_distribute_across_ranges_with_jitter() {
let ranges = vec![
TimeRange::<chrono::Utc> {
start: Utc.with_ymd_and_hms(2024, 1, 1, 0, 0, 0).unwrap(),
end: Utc.with_ymd_and_hms(2024, 1, 2, 0, 0, 0).unwrap(),
},
TimeRange::<chrono::Utc> {
start: Utc.with_ymd_and_hms(2024, 1, 5, 0, 0, 0).unwrap(),
end: Utc.with_ymd_and_hms(2024, 1, 6, 0, 0, 0).unwrap(),
},
];
//
let events = distribute_across_ranges_with_jitter(&ranges, 24, &Duration::zero());
let random_events = distribute_across_ranges_with_jitter(&ranges, 24, &Duration::hours(1));
println!("{:#?}", events);
println!("{:#?}", random_events);
assert_eq!(events.len(), 24);
for event in events {
assert!(ranges.iter().any(|r| r.is_in_range(&event)))
}
}
}

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first, the user defines a range of time over which to spread the commits,
and describes the valid times that commits may be in.
(for example, 2024-01-01 14:55 to 2024-01-10 15:32, 9:00 to 17:00 on weekdays, 9:00 to 11:00 on saturdays, never on sundays).
then we calculate the allowed regions, storing them for later.
mon tue wed thu fri sat sun mon tue wed
|--++--|--++--|--++--|--++--|--++--|----++|------|--++--|--++--|--++--|
we calculate the total duration of all the allowed region, to make a 'compressed' timeline, stored simply as number of seconds from the start of the range.
|++|++|++|++|++|++||++|++|++|
we distribute a number of 'events' equal to the number of commits over the compressed timeline
|+*|++|*+|+*|++|*+||+*|++|*+|
we apply a user specified amount of jitter to each event
|*+|++|*+|+*|++|+*||+*|+*|++|
we then re-expand the timeline with the following algorithm:
expanded_events = []
for event in events:
for region in allowed_regions:
if event.timestamp > region.duration:
event.timestamp -= region.duration
else:
events.push(region.start+event.timestamp)
break
the expanded timeline will then look like:
|--*+--|--++--|--*+--|--+*--|--++--|----+*|------|--+*--|--+*--|--++--|
we then sort the events (as the jitter may have put them out of order) and assign eatch commit, in order, to an event.