Add support for ~/.ivy2/cache as a repository

cache/src/main/scala/coursier/Cache.scala

@@ -467,13 +467,33 @@ object Cache {
       }
   }
 
+  private lazy val ivy2HomeUri = {
+    // a bit touchy on Windows... - don't try to manually write down the URI with s"file://..."
+    val str = new File(sys.props("user.home") + "/.ivy2/").toURI.toString
+    if (str.endsWith("/"))
+      str
+    else
+      str + "/"
+  }
+
   lazy val ivy2Local = IvyRepository(
-    // a bit touchy on Windows... - don't try to get the URI manually like s"file://..."
-    new File(sys.props("user.home") + "/.ivy2/local/").toURI.toString +
+    ivy2HomeUri + "local/" +
       "[organisation]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/" +
       "[artifact](-[classifier]).[ext]"
   )
 
+  lazy val ivy2Cache = IvyRepository(
+    ivy2HomeUri + "cache/" +
+      "(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[organisation]/[module]/[type]s/[artifact]-[revision](-[classifier]).[ext]",
+    metadataPatternOpt = Some(
+      ivy2HomeUri + "cache/" +
+        "(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[organisation]/[module]/[type]-[revision](-[classifier]).[ext]"
+    ),
+    withChecksums = false,
+    withSignatures = false,
+    dropInfoAttributes = true
+  )
+
   lazy val defaultBase = new File(
     sys.env.getOrElse(
       "COURSIER_CACHE",

cache/src/main/scala/coursier/CacheParse.scala

@@ -10,6 +10,8 @@ object CacheParse {
   def repository(s: String): Validation[String, Repository] =
     if (s == "ivy2local" || s == "ivy2Local")
       Cache.ivy2Local.success
+    else if (s == "ivy2cache" || s == "ivy2Cache")
+      Cache.ivy2Cache.success
     else {
       val repo = Parse.repository(s)
 

core/shared/src/main/scala/coursier/ivy/IvyRepository.scala

@@ -12,7 +12,9 @@ case class IvyRepository(
   properties: Map[String, String] = Map.empty,
   withChecksums: Boolean = true,
   withSignatures: Boolean = true,
-  withArtifacts: Boolean = true
+  withArtifacts: Boolean = true,
+  // hack for SBT putting infos in properties
+  dropInfoAttributes: Boolean = false
 ) extends Repository {
 
   def metadataPattern: String = metadataPatternOpt.getOrElse(pattern)
@@ -138,14 +140,28 @@ case class IvyRepository(
     for {
       artifact <- EitherT(F.point(eitherArtifact))
       ivy <- fetch(artifact)
-      proj <- EitherT(F.point {
+      proj0 <- EitherT(F.point {
         for {
           xml <- \/.fromEither(compatibility.xmlParse(ivy))
           _ <- if (xml.label == "ivy-module") \/-(()) else -\/("Module definition not found")
           proj <- IvyXml.project(xml)
         } yield proj
       })
-    } yield (source, proj)
+    } yield {
+      val proj =
+        if (dropInfoAttributes)
+          proj0.copy(
+            module = proj0.module.copy(
+              attributes = proj0.module.attributes.filter {
+                case (k, _) => !k.startsWith("info.")
+              }
+            )
+          )
+        else
+          proj0
+
+      (source, proj)
+    }
   }
 
 }