readme.md

• show タスクキー というのは、コンソール上で簡易的に実行結果見るためのものなので、そのデータをもとになにかする場合は使うべきでない。
• update タスクの戻り値型を確認
• https://github.com/sbt/sbt/blob/v0.13.2-M2/main/src/main/scala/sbt/Keys.scala#L245
• 型がUnitじゃなく、UpdateReport という型を返してるので、そのクラスを探して、欲しいデータが取れるか考える
• https://github.com/sbt/sbt/blob/v0.13.2-M2/ivy/src/main/scala/sbt/UpdateReport.scala#L16
• とりあえず、適当に作った、単にprintするだけのTaskがこれ
• こんな感じで、他のタスクに依存する新しいTaskを定義していく
• もし、updateのTaskから自分が欲しい情報が取れないなら、updateが依存してるタスクや内部的なメソッド(それでもダメそうなら別のKey)を探す
• 最終的にちゃんとしたsbt pluginまでつくるには、細かい点色々作法があるので、覚えること少し多いかも(とりあえずつくるだけならできるが)

build.sbt

val printUpdatedAllModules = TaskKey[Unit]("printUpdatedAllModules")

printUpdatedAllModules := {
  update.value.allModules foreach println
}

libraryDependencies += "com.typesafe.play" %% "play-json" % "2.2.2"

実行結果サンプル

org.scala-lang:scala-library:2.10.3:compile ()
com.typesafe.play:play-json_2.10:2.2.2:compile
com.typesafe.play:play-iteratees_2.10:2.2.2:compile
org.scala-stm:scala-stm_2.10:0.7:compile
com.typesafe:config:1.0.2:compile
com.typesafe.play:play-functional_2.10:2.2.2:compile
com.typesafe.play:play-datacommons_2.10:2.2.2:compile
joda-time:joda-time:2.2:compile
org.joda:joda-convert:1.3.1:compile
com.fasterxml.jackson.core:jackson-annotations:2.2.2:compile
com.fasterxml.jackson.core:jackson-core:2.2.2:compile
com.fasterxml.jackson.core:jackson-databind:2.2.2:compile
org.scala-lang:scala-reflect:2.10.3:compile ()
org.scala-lang:scala-library:2.10.3:runtime ()
com.typesafe.play:play-json_2.10:2.2.2:runtime
com.typesafe.play:play-iteratees_2.10:2.2.2:runtime
org.scala-stm:scala-stm_2.10:0.7:runtime
com.typesafe:config:1.0.2:runtime
com.typesafe.play:play-functional_2.10:2.2.2:runtime
com.typesafe.play:play-datacommons_2.10:2.2.2:runtime
joda-time:joda-time:2.2:runtime
org.joda:joda-convert:1.3.1:runtime
com.fasterxml.jackson.core:jackson-annotations:2.2.2:runtime
com.fasterxml.jackson.core:jackson-core:2.2.2:runtime
com.fasterxml.jackson.core:jackson-databind:2.2.2:runtime
org.scala-lang:scala-reflect:2.10.3:runtime ()
org.scala-lang:scala-library:2.10.3:test ()
com.typesafe.play:play-json_2.10:2.2.2:test
com.typesafe.play:play-iteratees_2.10:2.2.2:test
org.scala-stm:scala-stm_2.10:0.7:test
com.typesafe.play:play-iteratees_2.10:2.2.2:compile-internal
org.scala-stm:scala-stm_2.10:0.7:compile-internal
com.typesafe:config:1.0.2:compile-internal
com.typesafe.play:play-functional_2.10:2.2.2:compile-internal
com.typesafe.play:play-datacommons_2.10:2.2.2:compile-internal
joda-time:joda-time:2.2:compile-internal
com.typesafe.play:play-datacommons_2.10:2.2.2:compile-internal
joda-time:joda-time:2.2:compile-internal
com.typesafe.play:play-datacommons_2.10:2.2.2:compile-internal
joda-time:joda-time:2.2:compile-internal
org.joda:joda-convert:1.3.1:compile-internal
com.fasterxml.jackson.core:jackson-annotations:2.2.2:compile-internal
com.fasterxml.jackson.core:jackson-core:2.2.2:compile-internal
com.fasterxml.jackson.core:jackson-databind:2.2.2:compile-internal
org.scala-lang:scala-reflect:2.10.3:compile-internal ()
org.scala-lang:scala-library:2.10.3:runtime-internal ()
com.typesafe.play:play-json_2.10:2.2.2:runtime-internal
com.typesafe.play:play-iteratees_2.10:2.2.2:runtime-internal
org.scala-stm:scala-stm_2.10:0.7:runtime-internal
com.typesafe:config:1.0.2:runtime-internal
com.typesafe.play:play-functional_2.10:2.2.2:runtime-internal
com.typesafe.play:play-datacommons_2.10:2.2.2:runtime-internal
joda-time:joda-time:2.2:runtime-internal
org.joda:joda-convert:1.3.1:runtime-internal
com.fasterxml.jackson.core:jackson-annotations:2.2.2:runtime-internal
com.fasterxml.jackson.core:jackson-core:2.2.2:runtime-internal
com.fasterxml.jackson.core:jackson-databind:2.2.2:runtime-internal
org.scala-lang:scala-reflect:2.10.3:runtime-internal ()
org.scala-lang:scala-library:2.10.3:test-internal ()
com.typesafe.play:play-json_2.10:2.2.2:test-internal
com.typesafe.play:play-iteratees_2.10:2.2.2:test-internal
org.scala-stm:scala-stm_2.10:0.7:test-internal
com.typesafe:config:1.0.2:test-internal
com.typesafe.play:play-functional_2.10:2.2.2:test-internal
com.typesafe.play:play-datacommons_2.10:2.2.2:test-internal
joda-time:joda-time:2.2:test-internal
org.joda:joda-convert:1.3.1:test-internal
com.fasterxml.jackson.core:jackson-annotations:2.2.2:test-internal
com.fasterxml.jackson.core:jackson-core:2.2.2:test-internal
com.fasterxml.jackson.core:jackson-databind:2.2.2:test-internal
org.scala-lang:scala-reflect:2.10.3:test-internal ()
org.scala-lang:scala-compiler:2.10.3:scala-tool
org.scala-lang:scala-library:2.10.3:scala-tool ()
org.scala-lang:scala-reflect:2.10.3:scala-tool ()
org.scala-lang:jline:2.10.3:scala-toolorg.fusesource.jansi:jansi:1.4:scala-tool