cron-parser

It's just a practice of attempting to parse crontab expressions with Rust

Prerequisites

Install Rust

https://www.rust-lang.org/tools/install

Install Docker (optional)

https://docs.docker.com/engine/install

With Docker

Build

make build

Test

make test

Run

make run

docker-compose.yaml already provides example argument

With Cargo

Fast run

cargo run "*/15 0 1,15 * 1-5 /usr/bin/find"

Format

cargo fmt

Test

cargo test

Build

cargo build [--release]

Run

target/[debug|release]/cron-parser "*/15 0 1,15 * 1-5 /usr/bin/find"

Caveats

Apparently something like this 1,2-5/3,4,* is also valid according to crontab.guru. But this code is made with assumption that only one of ,, -, / are used at once for each slot which colud be updated to reflect that later.