WIP: Play json build (#182)

* play json build

* build progress

* add check task

* try to make play json js build

* scalariform and mima plugins in separate files. check mima

* better error message for mima compatibility check

* fix scala 2.10 compilation

* license headers support

* add jmh support

* fix reformat on compile; fix code validation; extract base module

* remove scala 2.13 from cross versions

* include play-json in integration tests

* add example .travis.yml

* bring back scala 2.13 support

* make reformat target, not command

* add release task

* update mill version in travis.yml

* update release script

* update release process

* add README.md for play json build

1 files changed, 61 insertions, 0 deletions

diff --git a/integration/test/resources/play-json/jmh.sc b/integration/test/resources/play-json/jmh.sc
new file mode 100644
index 00000000..76ed43fc
--- /dev/null
+++ b/integration/test/resources/play-json/jmh.sc
@@ -0,0 +1,61 @@
+import ammonite.ops._
+import mill._, scalalib._, modules._
+
+trait Jmh extends ScalaModule {
+
+  def ivyDeps = super.ivyDeps() ++ Agg(ivy"org.openjdk.jmh:jmh-core:1.19")
+
+  def runJmh(args: String*) = T.command {
+    val (_, resources) = generateBenchmarkSources()
+    Jvm.interactiveSubprocess(
+      "org.openjdk.jmh.Main",
+      classPath = (runClasspath() ++ generatorDeps()).map(_.path) ++
+        Seq(compileGeneratedSources().path, resources),
+      mainArgs = args,
+      workingDir = T.ctx.dest
+    )
+  }
+
+  def compileGeneratedSources = T {
+    val dest = T.ctx.dest
+    val (sourcesDir, _) = generateBenchmarkSources()
+    val sources = ls.rec(sourcesDir).filter(_.isFile)
+    %%("javac",
+       sources.map(_.toString),
+       "-cp",
+       (runClasspath() ++ generatorDeps()).map(_.path.toString).mkString(":"),
+       "-d",
+       dest)(wd = dest)
+    PathRef(dest)
+  }
+
+  // returns sources and resources directories
+  def generateBenchmarkSources = T {
+    val dest = T.ctx().dest
+
+    val sourcesDir = dest / 'jmh_sources
+    val resourcesDir = dest / 'jmh_resources
+
+    rm(sourcesDir)
+    mkdir(sourcesDir)
+    rm(resourcesDir)
+    mkdir(resourcesDir)
+
+    Jvm.subprocess(
+      "org.openjdk.jmh.generators.bytecode.JmhBytecodeGenerator",
+      (runClasspath() ++ generatorDeps()).map(_.path),
+      mainArgs = Array(
+        compile().classes.path,
+        sourcesDir,
+        resourcesDir,
+        "default"
+      ).map(_.toString)
+    )
+
+    (sourcesDir, resourcesDir)
+  }
+
+  def generatorDeps = resolveDeps(
+    T { Agg(ivy"org.openjdk.jmh:jmh-generator-bytecode:1.19") }
+  )
+}