Tweaking

core/shared/src/main/scala/coursier/core/Repository.scala

@@ -1,8 +1,8 @@
 package coursier.core
 
 import coursier.Fetch
-
 import coursier.core.compatibility.encodeURIComponent
+import coursier.maven.MavenSource
 import coursier.util.{EitherT, Monad}
 
 trait Repository extends Product with Serializable {
@@ -24,14 +24,22 @@ object Repository {
         "SHA-1" -> (underlying.url + ".sha1"),
         "SHA-256" -> (underlying.url + ".sha256")
       ))
-    def withDefaultSignature: Artifact =
+    def withDefaultSignature: Artifact = {
+
+      val underlyingExt =
+        if (underlying.attributes.`type`.isEmpty)
+          "jar"
+        else
+          // TODO move MavenSource.typeExtension elsewhere
+          MavenSource.typeExtension(underlying.attributes.`type`)
+
       underlying.copy(extra = underlying.extra ++ Seq(
         "sig" ->
           Artifact(
             underlying.url + ".asc",
             Map.empty,
             Map.empty,
-            Attributes("asc", ""),
+            Attributes(s"$underlyingExt.asc", ""),
             changing = underlying.changing,
             authentication = underlying.authentication
           )
@@ -39,4 +47,5 @@ object Repository {
       ))
     }
   }
+}
 

core/shared/src/main/scala/coursier/maven/MavenSource.scala

@@ -46,7 +46,7 @@ final case class MavenSource(
       )
 
       val changing0 = changing.getOrElse(isSnapshot(project.actualVersion))
-      var artifact =
+
       Artifact(
         root + path.mkString("/"),
         Map.empty,
@@ -57,11 +57,6 @@ final case class MavenSource(
       )
         .withDefaultChecksums
         .withDefaultSignature
-
-      if (publication.ext == "jar")
-        artifact = artifact.withDefaultSignature
-
-      artifact
     }
 
     val metadataArtifact = artifactOf(Publication(dependency.module.name, "pom", "pom", ""))