head and tail simultaneously!
Not finding an existing utility to head and tail the output, nor a good way to combine existing utilities even with the help of a couple friends of mine, we decided to make one. We ended up doing a "day of learning" session with about 50 other engineers from GitHub and collaboritively came up with a minimum viable solution that worked well!
Now it's a real utility that we keep improving. Go try it out!
Contributions are welcome! Here are some good first issues you could look into.
You need to have Rust installed.
# Install latest *release* version of headtail
$ cargo install headtail# Use it on a file - prints the first 10 and last 10 lines
$ headtail somebigfile.txt
# Pipe stdout to it - prints the first 10 and last 10 lines
$ somecommand | headtail
# Print the first 25 and last 5 lines of a file
$ headtail somebigfile.txt -H 25 -T 5
# Print the default amount of first lines, but only 3 last lines
$ headtail somebigfile.txt -T 3
# Do the default thing...but then keep tailing the file and print
# out anything new that is appended to it.
$ headtail somebigfile.txt -f
See headtail -h for a full list of command-line options.
# Run locally with arguments
$ cargo run -- YOUR_ARGS_GO_HERE
# Enable debug logging
$ RUST_LOG=trace cargo run -- YOUR_ARGS_GO_HERE
# Install local development version of headtail into your ~/.cargo/bin
$ cargo install --path .
Distributed under the terms of both the MIT license and the Apache License (Version 2.0).
See license/APACHE and license/MIT.