Add evicted stuff to update report

Should make evicted work fine from sbt-lm-coursier and sbt itself

modules/lm-coursier/src/main/scala/lmcoursier/internal/SbtUpdateReport.scala

@@ -262,10 +262,42 @@ private[internal] object SbtUpdateReport {
           } else
             reports.toVector
 
-        val details = reports0.map { rep =>
+        val mainReportDetails = reports0.map { rep =>
           OrganizationArtifactReport(rep.module.organization, rep.module.name, Vector(rep))
         }
 
+        val evicted = coursier.graph.Conflict(subRes).flatMap { c =>
+          // FIXME The project for c.wantedVersion is possibly not around (it's likely it was just not fetched)
+          val projOpt = subRes.projectCache.get((c.module, c.wantedVersion))
+            .orElse(subRes.projectCache.get((c.module, c.version)))
+          projOpt.toSeq.map {
+            case (_, proj) =>
+              // likely misses some details (transitive, exclusions, …)
+              val dep = Dependency(c.module, c.wantedVersion)
+              val dependee = Dependency(c.dependeeModule, c.dependeeVersion)
+              val dependeeProj = subRes.projectCache
+                .get((c.dependeeModule, c.dependeeVersion))
+                .map(_._2)
+                .getOrElse {
+                  // should not happen
+                  Project(c.dependeeModule, c.dependeeVersion, Nil, Map(), None, Nil, Nil, Nil, None, None, None, false, None, Nil, coursier.core.Info.empty)
+                }
+              val rep = moduleReport((dep, Seq((dependee, dependeeProj)), proj.copy(version = c.wantedVersion), Nil))
+                .withEvicted(true)
+                .withEvictedData(Some("version selection")) // ??? put latest-revision like sbt/ivy here?
+              OrganizationArtifactReport(c.module.organization.value, c.module.name.value, Vector(rep))
+          }
+        }
+
+        val details = (mainReportDetails ++ evicted)
+          .groupBy(r => (r.organization, r.name))
+          .toVector // order?
+          .map {
+            case ((org, name), l) =>
+              val modules = l.flatMap(_.modules)
+              OrganizationArtifactReport(org, name, modules)
+          }
+
         ConfigurationReport(
           ConfigRef(config.value),
           reports0,

modules/sbt-coursier/src/sbt-test/sbt-lm-coursier/evicted/build.sbt

@@ -0,0 +1,47 @@
+
+// examples adapted from https://github.com/coursier/sbt-coursier/pull/75#issuecomment-497128870
+
+lazy val a = project
+  .settings(
+    scalaVersion := "2.11.8",
+    libraryDependencies ++= Seq(
+      "org.typelevel" %% "cats-effect" % "1.3.1",
+      "org.typelevel" %% "cats-core" % "1.5.0"
+    )
+)
+
+lazy val b = project
+  .settings(
+    scalaVersion := "2.11.8",
+    libraryDependencies ++= Seq(
+      "org.slf4s" %% "slf4s-api" % "1.7.12",         // depends on org.slf4j:slf4j-api:1.7.12
+      "ch.qos.logback" % "logback-classic" % "1.1.2" // depends on org.slf4j:slf4j-api:1.7.6
+    )
+)
+
+lazy val check = taskKey[Unit]("")
+
+check := {
+
+  val aReport = update.in(a).value
+  val bReport = update.in(b).value
+
+  def doCheck(report: UpdateReport): Unit = {
+
+    val compileReport = report
+      .configurations
+      .find(_.configuration.name == "compile")
+      .getOrElse {
+        sys.error("compile report not found")
+      }
+
+    val foundEvictions = compileReport.details.exists(_.modules.exists(_.evicted))
+    if (!foundEvictions)
+      compileReport.details.foreach(println)
+    assert(foundEvictions)
+  }
+
+  // needs https://github.com/coursier/coursier/pull/1217
+  // doCheck(aReport)
+  doCheck(bReport)
+}

modules/sbt-coursier/src/sbt-test/sbt-lm-coursier/evicted/project/plugins.sbt

@@ -0,0 +1,13 @@
+addSbtPlugin {
+
+  val name = sys.props.getOrElse(
+    "plugin.name",
+    sys.error("plugin.name Java property not set")
+  )
+  val version = sys.props.getOrElse(
+    "plugin.version",
+    sys.error("plugin.version Java property not set")
+  )
+
+  "io.get-coursier" % name % version
+}

modules/sbt-coursier/src/sbt-test/sbt-lm-coursier/evicted/test

@@ -0,0 +1,2 @@
+> evicted
+> check

scripts/travis.sh

@@ -14,13 +14,19 @@ sbtShading() {
 }
 
 runLmCoursierTests() {
+  if [ "$TEST_GROUP" = 1 ]; then
+    SCRIPTED_EXTRA="sbt-lm-coursier/*"
+  else
+    SCRIPTED_EXTRA=""
+  fi
+
   # publishing locally to ensure shading runs fine
   ./metadata/scripts/with-test-repo.sh sbt \
     ++$TRAVIS_SCALA_VERSION! \
     mimaReportBinaryIssues \
     lm-coursier-shaded/publishLocal \
     lm-coursier/test \
-    "sbt-lm-coursier/scripted shared-$TEST_GROUP/*"
+    "sbt-lm-coursier/scripted shared-$TEST_GROUP/* $SCRIPTED_EXTRA"
 }
 
 runSbtCoursierTests() {