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  1. #!/bin/bash
  2. s='syntax = "proto3"; package com.protobuf.doc; import "meta_model.proto"; import "wrappers.proto"; import "options.proto"; option (version) = "3.1.0"; '
  3. grep -oP '\(version\) = "\K\d+(\.\d+)+' <<< "$s"
  4. sed -n 's/.*(version) = "\([0-9.]*\).*/\1/p' <<< "$s"
Success #stdin #stdout 0s 4168KB
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stdin 
Standard input is empty
stdout 
3.1.0
3.1.0
https://ideone.com/Niylke
language:
Bash (bash 5.0.3)
created:
5 years ago
visibility:
secret

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