Adjust verbosity and cache policies settings in SBT plugin

- Set default verbosity level to 0
- Use the same cache policies as the CLI app everywhere (local-only, then fetch-missing)
- Allow to manually override these via the environment (COURSIER_VERBOSITY and COURSIER_MODE), or Java properties (coursier.verbosity and coursier.mode)

plugin/src/main/scala-2.10/coursier/CoursierPlugin.scala

@@ -16,7 +16,7 @@ object CoursierPlugin extends AutoPlugin {
     val coursierMaxIterations = Keys.coursierMaxIterations
     val coursierChecksums = Keys.coursierChecksums
     val coursierArtifactsChecksums = Keys.coursierArtifactsChecksums
-    val coursierCachePolicy = Keys.coursierCachePolicy
+    val coursierCachePolicies = Keys.coursierCachePolicies
     val coursierVerbosity = Keys.coursierVerbosity
     val coursierResolvers = Keys.coursierResolvers
     val coursierSbtResolvers = Keys.coursierSbtResolvers
@@ -35,8 +35,8 @@ object CoursierPlugin extends AutoPlugin {
     coursierMaxIterations := 50,
     coursierChecksums := Seq(Some("SHA-1"), None),
     coursierArtifactsChecksums := Seq(None),
-    coursierCachePolicy := CachePolicy.FetchMissing,
-    coursierVerbosity := 0,
+    coursierCachePolicies := Settings.defaultCachePolicies,
+    coursierVerbosity := Settings.defaultVerbosityLevel,
     coursierResolvers <<= Tasks.coursierResolversTask,
     coursierSbtResolvers <<= externalResolvers in updateSbtClassifiers,
     coursierCache := Cache.default,

plugin/src/main/scala-2.10/coursier/Keys.scala

@@ -9,7 +9,7 @@ object Keys {
   val coursierMaxIterations = SettingKey[Int]("coursier-max-iterations", "")
   val coursierChecksums = SettingKey[Seq[Option[String]]]("coursier-checksums", "")
   val coursierArtifactsChecksums = SettingKey[Seq[Option[String]]]("coursier-artifacts-checksums", "")
-  val coursierCachePolicy = SettingKey[CachePolicy]("coursier-cache-policy", "")
+  val coursierCachePolicies = SettingKey[Seq[CachePolicy]]("coursier-cache-policies", "")
 
   val coursierVerbosity = SettingKey[Int]("coursier-verbosity", "")
 

plugin/src/main/scala-2.10/coursier/Settings.scala

@@ -0,0 +1,81 @@
+package coursier
+
+import scala.util.{Failure, Success, Try}
+
+object Settings {
+
+  private val baseDefaultVerbosityLevel = 0
+
+  def defaultVerbosityLevel: Int = {
+
+    def fromOption(value: Option[String], description: String): Option[Int] =
+      value.filter(_.nonEmpty).flatMap {
+        str =>
+          Try(str.toInt) match {
+            case Success(level) => Some(level)
+            case Failure(ex) =>
+              Console.err.println(
+                s"Warning: unrecognized $description value (should be an integer), ignoring it."
+              )
+              None
+          }
+      }
+
+    val fromEnv = fromOption(
+      sys.env.get("COURSIER_VERBOSITY"),
+      "COURSIER_VERBOSITY environment variable"
+    )
+
+    def fromProps = fromOption(
+      sys.props.get("coursier.verbosity"),
+      "Java property coursier.verbosity"
+    )
+
+    fromEnv
+      .orElse(fromProps)
+      .getOrElse(baseDefaultVerbosityLevel)
+  }
+
+
+  private val baseDefaultCachePolicies = Seq(
+    CachePolicy.LocalOnly,
+    CachePolicy.FetchMissing
+  )
+
+  def defaultCachePolicies: Seq[CachePolicy] = {
+
+    def fromOption(value: Option[String], description: String): Option[Seq[CachePolicy]] =
+      value.filter(_.nonEmpty).flatMap {
+        str =>
+          CacheParse.cachePolicies(str) match {
+            case scalaz.Success(Seq()) =>
+              Console.err.println(
+                s"Warning: no mode found in $description, ignoring it."
+              )
+              None
+            case scalaz.Success(policies) =>
+              Some(policies)
+            case scalaz.Failure(errors) =>
+              Console.err.println(
+                s"Warning: unrecognized mode in $description, ignoring it."
+              )
+              None
+          }
+      }
+
+    val fromEnv = fromOption(
+      sys.env.get("COURSIER_MODE"),
+      "COURSIER_MODE environment variable"
+    )
+
+    def fromProps = fromOption(
+      sys.props.get("coursier.mode"),
+      "Java property coursier.mode"
+    )
+
+    fromEnv
+      .orElse(fromProps)
+      .getOrElse(baseDefaultCachePolicies)
+  }
+
+}

plugin/src/main/scala-2.10/coursier/Tasks.scala

@@ -216,7 +216,7 @@ object Tasks {
       val checksums = coursierChecksums.value
       val artifactsChecksums = coursierArtifactsChecksums.value
       val maxIterations = coursierMaxIterations.value
-      val cachePolicy = coursierCachePolicy.value
+      val cachePolicies = coursierCachePolicies.value
       val cache = coursierCache.value
 
       val sv = scalaVersion.value // is this always defined? (e.g. for Java only projects?)
@@ -227,7 +227,7 @@ object Tasks {
         else
           coursierResolvers.value
 
-      val verbosity = coursierVerbosity.value
+      val verbosityLevel = coursierVerbosity.value
 
 
       val startRes = Resolution(
@@ -252,7 +252,7 @@ object Tasks {
         Files.write(cacheIvyPropertiesFile.toPath, "".getBytes("UTF-8"))
       }
 
-      if (verbosity >= 2) {
+      if (verbosityLevel >= 2) {
         println("InterProjectRepository")
         for (p <- projects)
           println(s"  ${p.module}:${p.version}")
@@ -283,8 +283,10 @@ object Tasks {
 
         val fetch = Fetch.from(
           repositories,
-          Cache.fetch(cache, CachePolicy.LocalOnly, checksums = checksums, logger = Some(resLogger), pool = pool),
-          Cache.fetch(cache, cachePolicy, checksums = checksums, logger = Some(resLogger), pool = pool)
+          Cache.fetch(cache, cachePolicies.head, checksums = checksums, logger = Some(resLogger), pool = pool),
+          cachePolicies.tail.map(p =>
+            Cache.fetch(cache, p, checksums = checksums, logger = Some(resLogger), pool = pool)
+          ): _*
         )
 
         def depsRepr(deps: Seq[(String, Dependency)]) =
@@ -297,7 +299,7 @@ object Tasks {
             s"${dep.module}:${dep.version}:${dep.configuration}"
           }.sorted.distinct
 
-        if (verbosity >= 1) {
+        if (verbosityLevel >= 1) {
           val repoReprs = repositories.map {
             case r: IvyRepository =>
               s"ivy:${r.pattern}"
@@ -313,9 +315,9 @@ object Tasks {
           errPrintln(s"Repositories:\n${repoReprs.map("  "+_).mkString("\n")}")
         }
 
-        if (verbosity >= 0)
+        if (verbosityLevel >= 0)
           errPrintln(s"Resolving ${currentProject.module.organization}:${currentProject.module.name}:${currentProject.version}")
-        if (verbosity >= 1)
+        if (verbosityLevel >= 1)
           for (depRepr <- depsRepr(currentProject.dependencies))
             errPrintln(s"  $depRepr")
 
@@ -374,9 +376,9 @@ object Tasks {
           }
         }
 
-        if (verbosity >= 0)
+        if (verbosityLevel >= 0)
           errPrintln("Resolution done")
-        if (verbosity >= 1) {
+        if (verbosityLevel >= 1) {
           val finalDeps = Config.dependenciesWithConfig(
             res,
             depsByConfig.map { case (k, l) => k -> l.toSet },
@@ -408,10 +410,23 @@ object Tasks {
         val artifactsLogger = createLogger()
 
         val artifactFileOrErrorTasks = allArtifacts.toVector.map { a =>
-          Cache.file(a, cache, cachePolicy, checksums = artifactsChecksums, logger = Some(artifactsLogger), pool = pool).run.map((a, _))
+          def f(p: CachePolicy) =
+            Cache.file(
+              a,
+              cache,
+              p,
+              checksums = artifactsChecksums,
+              logger = Some(artifactsLogger),
+              pool = pool
+            )
+
+          cachePolicies.tail
+            .foldLeft(f(cachePolicies.head))(_ orElse f(_))
+            .run
+            .map((a, _))
         }
 
-        if (verbosity >= 0)
+        if (verbosityLevel >= 0)
           errPrintln(s"Fetching artifacts")
 
         artifactsLogger.init()
@@ -425,7 +440,7 @@ object Tasks {
 
         artifactsLogger.stop()
 
-        if (verbosity >= 0)
+        if (verbosityLevel >= 0)
           errPrintln(s"Fetching artifacts: done")
 
         def artifactFileOpt(artifact: Artifact) = {