Add example/kotlinlib/linting

example/kotlinlib/linting/1-detekt/build.mill

@@ -0,0 +1,76 @@
+package build
+
+import mill._, kotlinlib._
+import mill.util.Jvm
+import mill.api.Loose
+
+object `package` extends RootModule with KotlinModule {
+
+  def kotlinVersion = "1.9.24"
+
+  // TODO extract this as Detekt module, similar to CheckstyleModule
+  /**
+   * Runs [[https://detekt.dev/docs/gettingstarted/cli Detekt]]
+   */
+  def detekt(): Command[Unit] = T.command {
+    val exitCode = detekt0()()
+
+    detektHandleErrors(exitCode)
+  }
+
+  private def detekt0() = T.task {
+
+    val args = Seq("-i", PathRef(T.workspace).path.toString()) ++
+      Seq("-c", PathRef(T.workspace / "detekt-config.yml").path.toString())
+
+    T.log.info("running detekt ...")
+    T.log.debug(s"with $args")
+
+    Jvm.callSubprocess(
+      mainClass = "io.gitlab.arturbosch.detekt.cli.Main",
+      classPath = detektClasspath().map(_.path),
+      mainArgs = args,
+      workingDir = millSourcePath, // allow passing relative paths for sources like src/a/b
+      streamOut = true,
+      check = false
+    ).exitCode
+  }
+
+  private def detektHandleErrors(exitCode: Int)(implicit ctx: mill.api.Ctx) = {
+
+    if (exitCode == 0) {} // do nothing
+    else if (exitCode == 2) {
+      throw new RuntimeException("detekt: Max issues was reached ")
+    } else if (exitCode == 3) {
+      throw new RuntimeException("detekt: Invalid configuration file detected")
+    }
+    else {
+      throw new RuntimeException(s"detekt exited abnormally with exit code = $exitCode")
+    }
+  }
+
+  /**
+   * Classpath for running Dekekt.
+   */
+  private def detektClasspath: T[Loose.Agg[PathRef]] = T {
+    defaultResolver().resolveDeps(
+      Agg(ivy"io.gitlab.arturbosch.detekt:detekt-cli:${detektVersion()}")
+    )
+  }
+
+  /**
+   * Detekt version.
+   */
+  private def detektVersion: T[String] = T {
+    "1.23.7"
+  }
+}
+
+/** See Also: src/example/Foo.kt */
+
+/** Usage
+
+> ./mill detekt
+error: ...Foo.kt:5:5: Function main is nested too deeply. [NestedBlockDepth]
+
+*/