ut
ut is a command line tool to handle a unix timestamp.
Motivation
There is a number of times to generate/parse unix timestamps.
I think date command exists to handle these situations. But there are a few problems that they are small, but vital for me.
- cannot use same options between macOS and Linux.
- hard to remember usage. (it might be happen because of above problem.)
That's why I made a new command line tool ut-cli.
I hope ut-cli works well when developers need to use the command which requires timestamps like aws-cli.
Example usage
Search logs from specific time period.
# from yesterday to today
$ aws logs filter-log-events \
--log-group-name <LOG_GROUP_NAME> \
--log-stream-names <LOG_STREAM_NAMES> \
--query <QUERY> \
--start-time $(ut -p ms g -b yesterday) \
--end-time $(ut -p ms g -b today)Installation
If you have rust toolchain, ut-cli can be installed with cargo.
$ cargo install ut-clior clone the repository and build it.
$ git clone https://github.com/yoshihitoh/ut-cli
$ cd ut-cli
$ cargo build --release
$ ./target/release/ut --version
ut 0.1.7Also there are pre-built binary for Linux, macOS and Windows. See releases.
Usage
ut-cli 0.1.7
yoshihitoh <[email protected]>
A command line tool to handle unix timestamp.
USAGE:
ut [FLAGS] [OPTIONS] <SUBCOMMAND>
FLAGS:
-u, --utc Use utc timezone.
-h, --help Prints help information
-V, --version Prints version information
OPTIONS:
-o, --offset <OFFSET> Use given value as timezone offset.
-p, --precision <PRECISION>
Set the precision of output timestamp.
SUBCOMMANDS:
generate Generate unix timestamp with given options.
help Prints this message or the help of the given subcommand(s)
parse Parse a unix timestamp and print it in human readable format.You can set options via envrionment variables.
| name | equiv option | example |
|---|---|---|
| UT_OFFSET | -o/--offset | 09:00 |
| UT_PRECISION | -p/--precision | millisecond |
| UT_DATETIME_FORMAT | - | %Y-%m-%d %H:%M |
UT_DATETIME_FORMAT follows chrono's datetime specifiers. See the document for details.
# Set variables.
$ export UT_OFFSET='09:00' # Use JST(+9).
$ export UT_PRECISION=millisecond # Use timestamps in milliseconds.
# Generate a timestamp.
$ ut g
1588059756238
# Parse a timestamp.
$ echo 1588059756238 | ut p
2020-04-28 16:42:36.238 (+09:00)
# Change custom format and timezone.
$ export UT_DATETIME_FORMAT="%m/%d/%Y"
$ echo 1588059756238 | ut --offset=-7 p
04/28/2020is equivalent to
$ ut -o '09:00' -p millisecond p $(ut -o '09:00' -p millisecond g)There are two subcommands available for now.
Generate a unix timestamp
Generate a unix timestamp of the midnight of today.
$ ut generate -b today
1560870000
# You can use `-p` option to show it in millisecond.
$ ut -p ms generate -b today
1560870000000You can specify time deltas with -d option.
# 3days, 12hours, 30minutes later from the midnight of today.
$ ut g -b today -d 3day -d 12hour -d 30minute
1561174200
# You can use short name on time unit.
$ ut g -b today -d 3d -d 12h -d 30min
1561174200
# You can modify a timestamp with a timestamp argument.
$ ut g -d 1min 1561174200
1561174260 # 1min(=60second) difference.Parse a unix timestamp
Parse a unix timestamp and print it in human readable format.
$ ut p $(ut g -b today)
2019-06-19 00:00:00 (+09:00)
# You can parse timestamp in milliseconds.
$ ut -p ms p $(ut -p ms g -b today -d 11h -d 22min -d 33s -d 444ms)
2019-06-19 11:22:33.444 (+09:00)Change timezone
Local timezone
If you don't set timezone options, ut command uses local timezone.
In Japan(UTC+9):
$ ut g --ymd 2019-06-24
1561302000
$ ut p 1561302000
2019-06-24 00:00:00 (+09:00)You can use -u or --utc option to use UTC timezone.
$ ut --utc p 1561302000
2019-06-23 15:00:00 (UTC)You can use fixed offset timezone on any environment.
# Generate PST timestamp
$ ut -o -8 g --ymd 2019-06-24
1561363200
# Parse as PST timestamp
$ ut -o -8 p 1561363200
2019-06-24 00:00:00 (-08:00)
# Parse as UTC timestamp
$ ut -o 0 p 1561363200
2019-06-24 08:00:00 (+00:00)TODO
- Add more information on README