This is a Rust implementation of the Unix pv utility. I don't intend to make a faithful implementation, I just replicated some features for fun and learning.
echo "hello" | cargo run -- -o /dev/null # Printing "hello" message to the /dev/null
yes | cargo run | head -n 1000000000 > yes.txt # Generating a large text file
cargo run yes.txt -o yes2.txt # Copying content from file `yes.txt` to `yes2.txt`cargo test