slice

slice allows to filter text data in a manner similiar to Python's slicing (informal description with examples here).

slice is designed to perform queries like "extract lines 12 to 21", "show first 10 lines", "show first 4 lines from last 10", "show last 6 lines".

In many cases slice can replace both head and tail.

Installation

Clone this repository:

$ git clone https://github.com/Reisse/slice.git

Then, install with cargo:

$ cargo install --path .

Usage

$ slice [OPTION]... [FILE]

Print slice from FILE to standard output. When slice is not specified, print whole file to standard output.

Options

Short option	Long option	Arguments	Description
-s	--slice	BEGIN:END	specify slice to print
-h	--help		display this help and exit
-v	--version		output version information and exit
	--		end of options

BEGIN and END may be any combination of positive (denoting position from the beginning) or negative (denoting position from the end) numbers.

Example

$ cat test
1
2
3
4
5
$ slice -s 0:2 test
1
2
$ slice -s -1:5 test
5
$ slice -s 2:-1 test
3
4
$ slice -s -5:-3 test
1
2

Caveats

• Both LF and CRLF are recognized as newline characters, but newlines are not preserved and are always replaced with LF in the output.
• Last line of the output will always end with LF.

License

See LICENSE file.