Load local ivy path from ivy.home and user.home system properties (#2484)

* Load local ivy path from `ivy.home` and `user.home` system properties

* Add tests for ivy.home and user.home overrides

Author: JD557

modules/cli/src/main/scala/scala/cli/commands/publish/RepoParams.scala

@@ -179,7 +179,10 @@ object RepoParams {
   }
 
   def ivy2Local(ivy2HomeOpt: Option[os.Path]) = {
-    val home = ivy2HomeOpt.getOrElse(os.home / ".ivy2")
+    val home = ivy2HomeOpt
+      .orElse(sys.props.get("ivy.home").map(prop => os.Path(prop)))
+      .orElse(sys.props.get("user.home").map(prop => os.Path(prop) / ".ivy2"))
+      .getOrElse(os.home / ".ivy2")
     val base = home / "local"
     // not really a Maven repo…
     RepoParams(

modules/integration/src/test/scala/scala/cli/integration/PublishLocalTestDefinitions.scala

@@ -145,4 +145,74 @@ abstract class PublishLocalTestDefinitions(val scalaVersionOpt: Option[String])
     }
   }
 
+  test("publish local with ivy.home") {
+    PublishTestInputs.inputs().fromRoot { root =>
+      def publishLocal(): os.CommandResult =
+        os.proc(
+          TestUtil.cli,
+          "--power",
+          "publish",
+          "local",
+          ".",
+          "--working-dir",
+          os.rel / "work-dir",
+          extraOptions
+        )
+          .call(
+            cwd = root,
+            env = Map(
+              "JAVA_OPTS" -> s"-Divy.home=${root / "ivyhome"} -Duser.home${root / "userhome"}"
+            ) // ivy.home takes precedence
+          )
+
+      def output(): String =
+        os.proc(
+          TestUtil.cs,
+          s"-J-Divy.home=${root / "ivyhome"}",
+          "launch",
+          s"${PublishTestInputs.testOrg}:${PublishTestInputs.testName}_$testedPublishedScalaVersion:$testPublishVersion"
+        )
+          .call(cwd = root)
+          .out.trim()
+
+      publishLocal()
+      expect(output() == "Hello")
+    }
+  }
+
+  test("publish local with user.home") {
+    PublishTestInputs.inputs().fromRoot { root =>
+      def publishLocal(): os.CommandResult =
+        os.proc(
+          TestUtil.cli,
+          "--power",
+          "publish",
+          "local",
+          ".",
+          "--working-dir",
+          os.rel / "work-dir",
+          extraOptions
+        )
+          .call(
+            cwd = root,
+            env = Map(
+              "JAVA_OPTS" -> s"-Duser.home=${root / "userhome"}"
+            )
+          )
+
+      def output(): String =
+        os.proc(
+          TestUtil.cs,
+          s"-J-Divy.home=${root / "userhome" / ".ivy2"}",
+          "launch",
+          s"${PublishTestInputs.testOrg}:${PublishTestInputs.testName}_$testedPublishedScalaVersion:$testPublishVersion"
+        )
+          .call(cwd = root)
+          .out.trim()
+
+      publishLocal()
+      expect(output() == "Hello")
+    }
+  }
+
 }