Add option to pass lib dependencies to coursier

This can be used to add custom url handlers to coursier, so
scala-steward could for example reach s3 buckets, google cloud storage
or artifactregistry.
See https://get-coursier.io/docs/extra.html#extra-protocols and
coursier/coursier#1987

Author: 987Nabil

docs/help.md

@@ -76,4 +76,6 @@ Options and flags:
         default: https://repo1.maven.org/maven2/
     --refresh-backoff-period <duration>
         Period of time a failed build won't be triggered again; default: 0days
+    --coursier-dependencies <string>
+        Additional coursier dependencies in the format <groupId>:<artifactId>:<version>, i.e. additional URL handlers. (can be used multiple times)
 ```

modules/core/src/main/scala/org/scalasteward/core/application/Cli.scala

@@ -232,6 +232,13 @@ object Cli {
   private val gitHubApp: Opts[Option[GitHubApp]] =
     (githubAppId, githubAppKeyFile).mapN(GitHubApp.apply).orNone
 
+  private val coursierDependencies: Opts[List[String]] =
+    options[String](
+      "coursier-dependencies",
+      "Additional coursier dependencies in the format <groupId>:<artifactId>:<version>, " +
+        "i.e. additional URL handlers. (can be used multiple times)"
+    ).orEmpty
+
   private val refreshBackoffPeriod: Opts[FiniteDuration] = {
     val default = 0.days
     val help = "Period of time a failed build won't be triggered again" +
@@ -267,7 +274,8 @@ object Cli {
     gitHubApp,
     urlCheckerTestUrl,
     defaultMavenRepo,
-    refreshBackoffPeriod
+    refreshBackoffPeriod,
+    coursierDependencies
   ).mapN(Config.apply)
 
   val command: Command[Config] =

modules/core/src/main/scala/org/scalasteward/core/application/Config.scala

@@ -68,7 +68,8 @@ final case class Config(
     githubApp: Option[GitHubApp],
     urlCheckerTestUrl: Uri,
     defaultResolver: Resolver,
-    refreshBackoffPeriod: FiniteDuration
+    refreshBackoffPeriod: FiniteDuration,
+    coursierDependencies: List[String]
 ) {
   def vcsUser[F[_]](implicit
       processAlg: ProcessAlg[F],

modules/core/src/main/scala/org/scalasteward/core/application/Context.scala

@@ -27,7 +27,7 @@ import org.scalasteward.core.buildtool.maven.MavenAlg
 import org.scalasteward.core.buildtool.mill.MillAlg
 import org.scalasteward.core.buildtool.sbt.SbtAlg
 import org.scalasteward.core.client.ClientConfiguration
-import org.scalasteward.core.coursier.{CoursierAlg, VersionsCache}
+import org.scalasteward.core.coursier.{CoursierAlg, CoursierDependenciesFetchAlg, VersionsCache}
 import org.scalasteward.core.edit.EditAlg
 import org.scalasteward.core.edit.hooks.HookExecutor
 import org.scalasteward.core.edit.scalafix._
@@ -158,7 +158,9 @@ object Context {
       implicit val scalafixCli: ScalafixCli[F] = new ScalafixCli[F]
       implicit val scalafmtAlg: ScalafmtAlg[F] = new ScalafmtAlg[F](config)
       implicit val selfCheckAlg: SelfCheckAlg[F] = new SelfCheckAlg[F](config)
-      implicit val coursierAlg: CoursierAlg[F] = CoursierAlg.create[F]
+      implicit val coursierDependenciesFetchAlg: CoursierDependenciesFetchAlg[F] =
+        CoursierDependenciesFetchAlg.create[F]
+      implicit val coursierAlg: CoursierAlg[F] = CoursierAlg.create[F](config)
       implicit val versionsCache: VersionsCache[F] =
         new VersionsCache[F](config.cacheTtl, versionsStore)
       implicit val updateAlg: UpdateAlg[F] = new UpdateAlg[F]

modules/core/src/main/scala/org/scalasteward/core/coursier/CoursierAlg.scala

@@ -23,6 +23,7 @@ import coursier.cache.{CachePolicy, FileCache}
 import coursier.core.{Authentication, Project}
 import coursier.{Fetch, Info, Module, ModuleName, Organization}
 import org.http4s.Uri
+import org.scalasteward.core.application.Config
 import org.scalasteward.core.data.Resolver.Credentials
 import org.scalasteward.core.data.{Dependency, Resolver, Scope, Version}
 import org.scalasteward.core.util.uri
@@ -45,15 +46,29 @@ trait CoursierAlg[F[_]] {
 }
 
 object CoursierAlg {
-  def create[F[_]](implicit
+  def create[F[_]](config: Config)(implicit
       logger: Logger[F],
       parallel: Parallel[F],
-      F: Sync[F]
+      F: Sync[F],
+      fetchAlg: CoursierDependenciesFetchAlg[F]
   ): CoursierAlg[F] = {
-    val fetch: Fetch[F] = Fetch[F](FileCache[F]())
+    val fetch: F[Fetch[F]] = fetchAlg
+      .classLoader(config.coursierDependencies)
+      .map { loader =>
+        Fetch[F](
+          FileCache[F]().withClassLoaders(loader :: Nil)
+        )
+      }
 
-    val cacheNoTtl: FileCache[F] =
-      FileCache[F]().withTtl(None).withCachePolicies(List(CachePolicy.Update))
+    val cacheNoTtl: F[FileCache[F]] =
+      fetchAlg
+        .classLoader(config.coursierDependencies)
+        .map { loader =>
+          FileCache[F]()
+            .withTtl(None)
+            .withCachePolicies(List(CachePolicy.Update))
+            .withClassLoaders(loader :: Nil)
+        }
 
     new CoursierAlg[F] {
       override def getArtifactUrl(dependency: Scope.Dependency): F[Option[Uri]] =
@@ -63,24 +78,27 @@ object CoursierAlg {
           dependency: coursier.Dependency,
           repositories: List[coursier.Repository]
       ): F[Option[Uri]] = {
-        val fetchArtifacts = fetch
-          .withArtifactTypes(Set(coursier.Type.pom, coursier.Type.ivy))
-          .withDependencies(List(dependency))
-          .withRepositories(repositories)
-        fetchArtifacts.ioResult.attempt.flatMap {
-          case Left(throwable) =>
-            logger.debug(throwable)(s"Failed to fetch artifacts of $dependency").as(None)
-          case Right(result) =>
-            val maybeProject = result.resolution.projectCache
-              .get(dependency.moduleVersion)
-              .map { case (_, project) => project }
-            maybeProject.traverseFilter { project =>
-              getScmUrlOrHomePage(project.info) match {
-                case Some(url) => F.pure(Some(url))
-                case None =>
-                  getParentDependency(project).traverseFilter(getArtifactUrlImpl(_, repositories))
+        val fetchArtifacts = fetch.map(
+          _.withArtifactTypes(Set(coursier.Type.pom, coursier.Type.ivy))
+            .withDependencies(List(dependency))
+            .withRepositories(repositories)
+        )
+        fetchArtifacts.flatMap {
+          _.ioResult.attempt.flatMap {
+            case Left(throwable) =>
+              logger.debug(throwable)(s"Failed to fetch artifacts of $dependency").as(None)
+            case Right(result) =>
+              val maybeProject = result.resolution.projectCache
+                .get(dependency.moduleVersion)
+                .map { case (_, project) => project }
+              maybeProject.traverseFilter { project =>
+                getScmUrlOrHomePage(project.info) match {
+                  case Some(url) => F.pure(Some(url))
+                  case None =>
+                    getParentDependency(project).traverseFilter(getArtifactUrlImpl(_, repositories))
+                }
               }
-            }
+          }
         }
       }
 
@@ -90,10 +108,12 @@ object CoursierAlg {
             logger.error(message) >> F.raiseError(new Throwable(message))
           case Right(repository) =>
             val module = toCoursierModule(dependency)
-            repository.versions(module, cacheNoTtl.fetch).run.flatMap {
-              case Left(message) =>
-                logger.debug(message) >> F.raiseError(new Throwable(message))
-              case Right((versions, _)) => F.pure(versions.available.map(Version.apply).sorted)
+            cacheNoTtl.flatMap { cacheNoTtl =>
+              repository.versions(module, cacheNoTtl.fetch).run.flatMap {
+                case Left(message) =>
+                  logger.debug(message) >> F.raiseError(new Throwable(message))
+                case Right((versions, _)) => F.pure(versions.available.map(Version.apply).sorted)
+              }
             }
         }
 

modules/core/src/main/scala/org/scalasteward/core/coursier/CoursierDependenciesFetchAlg.scala

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2018-2022 Scala Steward contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.scalasteward.core.coursier
+
+import cats.Parallel
+import cats.effect._
+import cats.implicits._
+import coursier._
+import coursier.cache.FileCache
+
+import java.net.URLClassLoader
+
+/**
+ * An interface to fetch dependencies for the coursier alg via coursier.
+ */
+trait CoursierDependenciesFetchAlg[F[_]] {
+  def classLoader(dependencies: Seq[String]): F[ClassLoader]
+}
+
+object CoursierDependenciesFetchAlg {
+  def create[F[_]](implicit parallel: Parallel[F], F: Sync[F]): CoursierDependenciesFetchAlg[F] =
+    (dependencies: Seq[String]) =>
+      Fetch[F](FileCache[F]())
+        .withDependencies(dependencies.map { dep =>
+          val Array(org, name, version) = dep.split(':')
+          Dependency(Module(Organization(org), ModuleName(name)), version)
+        })
+        .io
+        .map(result => new URLClassLoader(result.map(_.toURI.toURL).toArray))
+}