tf - CLI Unix Time formatter

tf scans for UNIX epoch times in input and outputs them as human readable strings to stdout.

$ cat log.txt
[1524241219] Time is on my side
[1555777220] Yes it is
[1587399621] A time in epoch millis: 1637419929123
[1618935621] A time in epoch nanos: 1637419929123456789

$ tf -g log.txt
[12:20:19] Time is on my side
[12:20:20] Yes it is
[12:20:21] A time in epoch millis: 09:52:09.123
[12:20:21] A time in epoch nanos: 09:52:09.123456789

Usage

$ tf --help
usage:  tf <options> [file1 [file2 [...]]]

UNIX Time Formatter (tf)

Scans for UNIX epoch times in input and outputs them
as human readable strings to stdout.

10-digits are interpreted as seconds, 13 as milliseconds,
16 as microseconds, and 19 as nanoseconds.

If no filenames or only '-' is passed, stdin is processed.

examples:
  $ echo 1637421447 | tf
  $ tf -g log.txt | head

The time formatting uses Golang Time.Format layouts:
  https://pkg.go.dev/time#Time.Format

options:
  -b, --block               use block buffering (default: line buffering)
  -z, --block-size uint32   block buffer size (default 4096)
  -d, --date                output with date, same as --format '2006-01-02 15:04:05'
  -f, --format string       output with Golang Time.Format layout (default: '15:04:05')
  -g, --global              global match (default: convert only first match in line)
  -h, --help                show help

Installing

Binaries for multiple platforms are released on GitHub through GitHub Actions.

You can also install for various platforms with Homebrew from neomantra/homebrew-tap:

brew tap neomantra/homebrew-tap
brew install tf

Example Usage

Raw log:

$ cat log.txt
[1524241219] Time is on my side
[1555777220] Yes it is
[1587399621] A time in epoch millis: 1637419929123
[1618935621] A time in epoch nanos: 1637419929123456789

Basic usage, piping from stdin:

$ cat log.txt | tf
[12:20:19] Time is on my side
[12:20:20] Yes it is
[12:20:21] A time in epoch millis: 1637419929123
[12:20:21] A time in epoch nanos: 1637419929123456789

Date conversion:

$ tf -d log.txt
[2018-04-20 12:20:19] Time is on my side
[2019-04-20 12:20:20] Yes it is
[2020-04-20 12:20:21] A time in epoch millis: 1637419929123
[2021-04-20 12:20:21] A time in epoch nanos: 1637419929123456789

Global match, converting sub-second times:

$ tf -gd log.txt
[2018-04-20 12:20:19] Time is on my side
[2019-04-20 12:20:20] Yes it is
[2020-04-20 12:20:21] A time in epoch millis: 2021-11-20 09:52:09.123
[2021-04-20 12:20:21] A time in epoch nanos: 2021-11-20 09:52:09.123456789

Building

Building is performed with task:

$ task
task: [test] go test neomantra/tf/internal/tf
ok      neomantra/tf/internal/tf
task: [build] go build -o tf cmd/tf/main.go

Credits and License

Released under the MIT License, see LICENSE.txt.