#!/bin/bash
s='libstuff-example1 (>= 6.3.2),
libpackage-example2 (>= 5.2.1),
libtest-example3 (>= 5.2.1)'
val=$(awk -F'[ ()]+' '/^libpackage-/{print $3}' <<< "$s")
echo "$val"
IyEvYmluL2Jhc2gKcz0nbGlic3R1ZmYtZXhhbXBsZTEgKD49IDYuMy4yKSwKbGlicGFja2FnZS1leGFtcGxlMiAoPj0gNS4yLjEpLApsaWJ0ZXN0LWV4YW1wbGUzICg+PSA1LjIuMSknCgp2YWw9JChhd2sgLUYnWyAoKV0rJyAnL15saWJwYWNrYWdlLS97cHJpbnQgJDN9JyAgPDw8ICIkcyIpCmVjaG8gIiR2YWwi