from spack import *

class Libevent(Package):
    """The libevent API provides a mechanism to execute a callback function
       when a specific event occurs on a file descriptor or after a timeout has been
       reached. Furthermore, libevent also support callbacks due to signals or regular
       timeouts.
    """

    homepage = "http://libevent.org"
    url      = "https://github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz"
    list_url = "http://libevent.org/old-releases.html"

    version('2.0.21', 'b2405cc9ebf264aa47ff615d9de527a2')
    version('2.0.20', '94270cdee32c0cd0aa9f4ee6ede27e8e')
    version('2.0.19', '91111579769f46055b0a438f5cc59572')
    version('2.0.18', 'aa1ce9bc0dee7b8084f6855765f2c86a')
    version('2.0.17', 'dad64aaaaff16b5fbec25160c06fee9a')
    version('2.0.16', '899efcffccdb3d5111419df76e7dc8df')
    version('2.0.15', '2643abe7ba242df15c08b2cc14ec8759')
    version('2.0.14', 'cac0f379da35d3b98f83ac16fcfe1df4')
    version('2.0.13', 'af786b4b3f790c9d3279792edf7867fc')
    version('2.0.12', '42986228baf95e325778ed328a93e070')

    variant('openssl', default=True, description="Build with encryption enabled at the libevent level.")
    depends_on('openssl', when='+openssl')

    def install(self, spec, prefix):
        configure_args = []
        if '+openssl' in spec:
            configure_args.append('--enable-openssl')
        else:
            configure_args.append('--enable-openssl')

        configure("--prefix=%s" % prefix, *configure_args)
        make()
        make("install")