// include the latest version of the regex crate in your Cargo.toml
extern crate regex;
use regex::Regex;
fn main() {
let regex = Regex::new(r"(?m)((?:^ETCD_INITIAL_CLUSTER=)(?:[a-z0-9-.]{10,}=https:\/\/[0-9]+(?:\.[0-9]+){3}:2380,?){0,2})(,?app-failedhost-eeeeeeeeee.node.consul=https:\/\/[0-9]+(?:[.][0-9]+){3}:2380,?)((?:,?[a-z0-9-.]{15,}=https:\/\/[0-9]+(?:\.[0-9]+){3}:2380,?){0,2})").unwrap();
let string = "ETCD_INITIAL_CLUSTER=app-failedhost-eeeeeeeeee.node.consul=https://192.168.18.39:2380,app-instance-de24a5c1aefb.node.consul=https://192.168.18.92:2380,app-instance-6cc297ab3cc.node.consul=https://192.168.18.11:2380
ETCD_INITIAL_CLUSTER=app-instance-de24a5c1aefb.node.consul=https://192.168.18.92:2380,app-failedhost-eeeeeeeeee.node.consul=https://192.168.18.39:2380,app-instance-6cc297ab3cc.node.consul=https://192.168.18.11:2380
ETCD_INITIAL_CLUSTER=app-instance-de24a5c1aefb.node.consul=https://192.168.18.92:2380,app-instance-6cc297ab3cc.node.consul=https://192.168.18.11:2380,app-failedhost-eeeeeeeeee.node.consul=https://192.168.18.39:2380
";
let substitution = "\\1\\3";
// result will be a String with the substituted value
let result = regex.replace_all(string, substitution);
println!("{}", result);
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/