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package ch.jodersky.sbt.jni
package build
import java.io.File
import java.nio.file.Files
import scala.io.Source
import sbt.Logger
trait BuildTool {
/** Name of this build tool. */
def name: String
/** Detect if this build tool is configured in the given directory.
* E.g. for the Make build tool, this would return true if a Makefile is present
* in the given directory.
*/
def detect(baseDirectory: File): Boolean
protected def templateMappings: Seq[(String, String)]
/** Initialize the given directory with a minimal, functioning configuration for
* this build tool. E.g. for the Make build tool, this would create a Makefile in
* the given directory that is compatible with sbt-jni.
* @return all created files
*/
def initTemplate(baseDirectory: File, projectName: String): Seq[File] =
for ((resource, name) <- templateMappings) yield {
val resourceStream = this.getClass.getResourceAsStream(resource)
if (resourceStream == null) sys.error(s"Template for $name not found.")
val raw = Source.fromInputStream(resourceStream).mkString("")
val replaced = raw.replaceAll("\\{\\{project\\}\\}", projectName)
baseDirectory.mkdir()
val out = baseDirectory.toPath().resolve(name)
Files.write(out, replaced.getBytes)
out.toFile()
}
/** Actual tasks that can be perfomed on a specific configuration, such as
* configured in a Makefile.
*/
trait Instance {
/** Invokes the native build tool's clean task */
def clean(): Unit
/** Invokes the native build tool's main task, resulting in a single shared
* library file.
* @param baseDirectory the directory where the native project is located
* @param buildDirectory a directory from where the build is called, it may be used
* to store temporary files
* @param targetDirectory the directory into which the native library is copied
* @return the native library file
*/
def library(
targetDirectory: File
): File
}
/** Get an instance (build configuration) of this tool, in the specified directory. */
def getInstance(baseDirectory: File, buildDirectory: File, logger: Logger): Instance
}
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