extract
| Crates.io | extract |
| lib.rs | extract |
| version | 0.1.1 |
| source | src |
| created_at | 2017-03-06 22:37:53.907674 |
| updated_at | 2017-03-11 11:37:00.469802 |
| description | A tool for extracting text from text. |
| homepage | |
| repository | https://github.com/jelford/extract/ |
| max_upload_size | |
| id | 8865 |
| size | 9,265 |
James Elford (jelford)
documentation
README
extract
Extract text from text using a regex - a simple way to consume keyed fields from poorly-(or un-)structured text.
Usage
Extract accepts as an argument a regex with a single capture group, and will read lines from stdin, printing captured values.
> echo "hello subject=world" | extract "subject=(.+)"
world
extract keeps reading until it reaches the end of input, processing lines one-at-a-time:
> cat multiline
Hello subject=world
Hello subject=Dorris
> cat multiline | extract "subject=(\w+)"
world
Dorris
Installation
From source:
cargo install
From crates.io:
cargo install extract
License
MIT / Apache 2.
Issues / Contributing
Feel free to open an issue / PR. I'd be interested in adding support for more structured outputs (e.g. JSON from a regex with named capture groups).
FAQs
- How is this different to
grep -o?
extract only prints the catured group, not the whole match.
- Can't you use
sedfor this?
Not first time, normally. Maybe your sed-fu is better than mine. This tool was originally created when I needed to extract ids from the output of xinput --list, in frustration after the fourth attempt to deliver the correct incantations to sed.