How do you use environment variables inside of Config.groovy - grails

Question

Inside of Config.groovy i have setup a few environment variables:
def appName = grails.util.Metadata.current.getApplicationName()
def casUrl = "https://login.cas.server/cas"
environments {
development {
grails.logging.jul.usebridge = true
host.address = "12.34.56.78"
host.port = "8080"
}
test {
grails.logging.jul.usebridge = true
host.address = "http://staging.server.somewhere.com/"
host.port = ""
}
production {
grails.logging.jul.usebridge = false
host.address = "http://www.production.com"
host.port = ""
}
}
I'm trying to use those values inside the same configuration file (Config.groovy) like so:
grails.plugin.springsecurity.cas.loginUri = '/login'
grails.plugin.springsecurity.cas.serviceUrl = "${host.address}:${host.port}/${appName}/j_spring_cas_security_check"
grails.plugin.springsecurity.cas.serverUrlPrefix = '${casUrl}'
grails.plugin.springsecurity.cas.proxyCallbackUrl = "/secure/receptor"
grails.plugin.springsecurity.logout.afterLogoutUrl = "${casUrl}/logout?url=${host.address}:${host.port}/${appName}/"
However, the only thing that is getting resolved is the appName variable, everything else is null. Is this something that can be done? It looks like it was used in this post here Grails: Spring Security CAS Working in 2.2.3 but I cant seem to get them to resolve.
If I do something like
def appName = grails.util.Metadata.current.getApplicationName()
def casUrl = "https://login.umt.edu/cas"
host.address = "MyAddress"
environments {
...
The configSlurper resolves that host.address inside the CAS config, why can't I access the enviornment variables?

Answer 1

See the answer here under Basic Configuration.
However, you can't nest after using the dot notation. In other words, this won't work
// Won't work!
foo.bar {
hello = "world"
good = "bye"
}
So try to use nesting like this
foo {
bar {
hello = "world"
good = "bye"
}
}

Answer 2

Move the properties that depend on host.address and host.port inside each environment block:
environments {
development {
grails.logging.jul.usebridge = true
host.address = "12.34.56.78"
host.port = "8080"
grails.plugin.springsecurity.cas.serviceUrl = "${host.address}:${host.port}/${appName}/j_spring_cas_security_check"
grails.plugin.springsecurity.logout.afterLogoutUrl = "${casUrl}/logout?url=${host.address}:${host.port}/${appName}/"
}
test {
grails.logging.jul.usebridge = true
host.address = "http://staging.server.somewhere.com/"
host.port = ""
grails.plugin.springsecurity.cas.serviceUrl = "${host.address}:${host.port}/${appName}/j_spring_cas_security_check"
grails.plugin.springsecurity.logout.afterLogoutUrl = "${casUrl}/logout?url=${host.address}:${host.port}/${appName}/"
}
production {
grails.logging.jul.usebridge = false
host.address = "http://www.production.com"
host.port = ""
grails.plugin.springsecurity.cas.serviceUrl = "${host.address}:${host.port}/${appName}/j_spring_cas_security_check"
grails.plugin.springsecurity.logout.afterLogoutUrl = "${casUrl}/logout?url=${host.address}:${host.port}/${appName}/"
}
}
You can get rid of the host.address and host.port variables altogether:
environments {
development {
grails.logging.jul.usebridge = true
grails.plugin.springsecurity.cas.serviceUrl = "http://12.34.56.78:8080/${appName}/j_spring_cas_security_check"
grails.plugin.springsecurity.logout.afterLogoutUrl = "${casUrl}/logout?url=http://12.34.56.78:8080/${appName}/"
}
test {
grails.logging.jul.usebridge = true
grails.plugin.springsecurity.cas.serviceUrl = "http://staging.server.somewhere.com/${appName}/j_spring_cas_security_check"
grails.plugin.springsecurity.logout.afterLogoutUrl = "${casUrl}/logout?url=http://staging.server.somewhere.com/${appName}/"
}
production {
grails.logging.jul.usebridge = false
grails.plugin.springsecurity.cas.serviceUrl = "http://www.production.com/${appName}/j_spring_cas_security_check"
grails.plugin.springsecurity.logout.afterLogoutUrl = "${casUrl}/logout?url=http://www.production.com/${appName}/"
}
}