Added log statement to BuildInfo generator

1 files changed, 22 insertions, 19 deletions

diff --git a/contrib/buildinfo/src/BuildInfo.scala b/contrib/buildinfo/src/BuildInfo.scala
index 1c8d9d9e..0b63cbf1 100644
--- a/contrib/buildinfo/src/BuildInfo.scala
+++ b/contrib/buildinfo/src/BuildInfo.scala
@@ -2,9 +2,8 @@ package mill.contrib
 
 import mill.T
 import mill.define.Target
-import mill.api.PathRef
+import mill.api.{Ctx, Logger, PathRef}
 import mill.scalalib.ScalaModule
-import mill.api.Ctx
 
 trait BuildInfo extends ScalaModule {
 
@@ -16,29 +15,33 @@ trait BuildInfo extends ScalaModule {
     Map.empty[String, String]
   }
 
-  private def generateBuildInfo(members: Map[String, Any])(implicit dest: Ctx.Dest): Seq[PathRef] =
-  if(!members.isEmpty){
-    val outputFile = dest.dest / "BuildInfo.scala"
-    val internalMembers =
-      members
-        .map {
-          case (name, value) => s"""  def ${name} = "${value}""""
-        }
-        .mkString("\n")
-    os.write(outputFile,
-      s"""|${buildInfoPackageName.map(p => s"package ${p}").getOrElse("")}
+  private def generateBuildInfo(members: Map[String, Any])(implicit dest: Ctx.Dest, log: Ctx.Log): Seq[PathRef] =
+    if (!members.isEmpty) {
+      val outputFile = dest.dest / "BuildInfo.scala"
+      val internalMembers =
+        members
+          .map {
+            case (name, value) => s"""  def ${name} = "${value}""""
+          }
+          .mkString("\n")
+      log.log.debug(s"Generating object [${buildInfoPackageName.map(_ + ".").getOrElse("")}${buildInfoObjectName}] with [${members.size}] members to [${outputFile}]")
+      os.write(
+        outputFile,
+        s"""|${buildInfoPackageName.map(p => s"package ${p}").getOrElse("")}
           |object ${buildInfoObjectName} {
           |$internalMembers
-          |}""".stripMargin)
-    Seq(PathRef(outputFile))
-  } else {
-    Seq.empty[PathRef]
-  }
+          |}""".stripMargin
+      )
+      Seq(PathRef(outputFile))
+    } else {
+      log.log.debug("No build info member defined, skipping code generation")
+      Seq.empty[PathRef]
+    }
 
   def buildInfo = T {
     generateBuildInfo(buildInfoMembers())
   }
 
-  override def generatedSources: Target[Seq[PathRef]] = super.generatedSources() ++ buildInfo()
+  override def generatedSources: Target[Seq[PathRef]] = T { super.generatedSources() ++ buildInfo() }
 
 }