Package: vala-tools

"vala-tools" package binaries on CentOS:

/usr/bin/vala-gen-introspect-0.10 /usr/bin/vala-gen-introspect /usr/bin/vapicheck-0.10 /usr/bin/vapicheck /usr/bin/vapigen-0.10 /usr/bin/vapigen

You may install this package on CentOS with yum install vala-tools