Sets variables from a shell script. Only variable assignments are processed. Substitution is done, but environment variables are not recognized.
2026-6-28 Only recognizes ${var}, not $var. Environment variables are not recognized.
check_shell_extract <shell-script>;
check_shell_extract VERSION;
VERSION:
VERSION=1.2.3
BUILD_NUMBER=1249
DIR=mydir/${VERSION}
No attributes may be specified.