Gradle JAR Creation Timing - gradle

Question

i have a gradle build that retrieves properties file and such that are remote (to keep passwords out of github) but the remote retrieval doesn't complete by the time the JAR is built.
i figured i either had to get the JAR created in the execution phase instead of configuration phase or add the remote files in the execution phase but i couldn't get either working.
any suggestions?
task fatJar(type: Jar) {
doFirst {
exec {
executable './scripts/getRemoteResources.sh'
}
}
...
from {
configurations.compile.collect { it.isDirectory() ? it : zipTree(it)
}
//some resources are retrieved remotely & b/c of timing they don't get included here
from ('src/main/java/resources') {
include '*'
}
with jar
//tried this but doesn't work
//doLast {
// jar {
// from ('src/main/java/resources') {
// include '*'
// }
// }
//}
}

Answer 1

You shouldn't use the task graph for this. Also you shouldn't download the file to src/main/
Instead, you should
Create a task to download the remote resources to a directory under $buildDir (so it's cleaned via the "clean" task)
Configure the TaskOutputs so that the result can be cached and re-used.
Wire the task into Gradle's DAG
Add the directory to the "processResources" task so it ends up on the runtime classpath (ie in the jar)
Eg:
tasks.register('remoteResources', Exec) {
inputs.property('environment', project.property('env')) // this assumes there's a project property named 'env'
outputs.dir "$buildDir/remoteResources" // point 2 (above)
commandLine = [
'./scripts/getRemoteResources.sh',
'--environment', project.property('env'),
'--outputdir', "$buildDir/remoteResources"
]
doFirst {
delete "$buildDir/remoteResources"
mkdir "$buildDir/remoteResources"
}
}
processResources {
from tasks.remoteResources // points 3 & 4 (above)
}
See The Java Plugin - Tasks
processResources — Copy
Copies production resources into the production resources directory.

Answer 2

this seems to work so i'm going with it unless someone has a better solution...
gradle.taskGraph.beforeTask { Task task ->
println "just before $task.name"
// i just chose to kick this off with the first task sent through here
if (task.name=="compileJava") {
exec {
executable './scripts/getRemoteResources.sh'
}
}
}
task fatJar(type: Jar) {
...
from {
configurations.compile.collect { it.isDirectory() ? it : zipTree(it)
}
from ('src/main/java/resources') {
include '*'
}
with jar
}