scala - Get resource file from dependency in sbt -

i have sbt-web project webjar , common jar dependencies. want resource file 1 of jar dependency , use in concatenation task. don't know how refer resource inside dependent jar in build.sbt.

i find solution this docs. main idea find right jar in classpath dependencies, unzip temprorary folder , need files. in case copy target directory , use in concatenation task.

i end code:

def copyresourcefromjar(classpathentry: attributed[file], jarname: string, resourcename: string) = {   classpathentry.get(artifact.key) match {     case some(entryartifact) => {       // searching artifact       if (entryartifact.name.startswith(jarname)) {         // unpack artifact's jar tmp directory         val jarfile = classpathentry.data         io.withtemporarydirectory { tmpdir =>           io.unzip(jarfile, tmpdir)           // copy project's target directory           // instead of copying can other stuff here            io.copyfile(             tmpdir / resourcename,             (webkeys.webjarsdirectory in assets).value / resourcename           )         }       }     }     case _ =>   } } for(entry <- (dependencyclasspath in compile).value) yield {   copyresourcefromjar(entry, "firstjar", "firstfile.js")   copyresourcefromjar(entry, "secondjar", "some/path/secondfile.js") } 

this code should placed in task. example:

val copyresourcesfromjar = taskkey[unit]("copyresourcesfromjar", "copy resources jar dependencies") copyresourcesfromjar := {   //your task code here } copyresourcesfromjar <<= copyresourcesfromjar dependson (dependencyclasspath in compile) 

and don't forget add task dependcy build task. in case looks this:

concat <<= concat dependson copyresourcesfromjar