Add more info or debug messages for applyRepoCredentials and addCredentials about gradle-maven-settings-plugin

[sslavic]

Custom modified plugin with extra info messages helped me troubleshoot the problem.
I had to apply maven-settings plugin to subprojects.

Here is the diff of custom changes:

diff --git a/src/main/groovy/net/linguica/gradle/maven/settings/MavenSettingsPlugin.groovy b/src/main/groovy/net/linguica/gradle/maven/settings/MavenSettingsPlugin.groovy
index bc45f2b..37c7beb 100644
--- a/src/main/groovy/net/linguica/gradle/maven/settings/MavenSettingsPlugin.groovy
+++ b/src/main/groovy/net/linguica/gradle/maven/settings/MavenSettingsPlugin.groovy
@@ -58,8 +58,8 @@ public class MavenSettingsPlugin implements Plugin<Project> {
             loadSettings(project, extension)
             activateProfiles(project, extension)
             registerMirrors(project)
-            applyRepoCredentials(project.repositories)
-            applyRepoCredentials(project.extensions.findByType(PublishingExtension)?.repositories)
+            applyRepoCredentials(project, project.repositories)
+            applyRepoCredentials(project, project.extensions.findByType(PublishingExtension)?.repositories)
         }
     }

@@ -132,16 +132,24 @@ public class MavenSettingsPlugin implements Plugin<Project> {
         }
     }

-    private void applyRepoCredentials(@Nullable Collection<ArtifactRepository> repositories) {
+    private void applyRepoCredentials(Project project, @Nullable Collection<ArtifactRepository> repositories) {
         repositories?.all { repo ->
+            project.logger.info "Discovered repository '${repo.name}'"
             if (repo instanceof MavenArtifactRepository) {
                 settings.servers.each { server ->
                     if (repo.name == server.id) {
-                        addCredentials(server, repo)
+                        project.logger.info "Found a matching server '${server.id}' in settings.xml"
+                        addCredentials(project, server, repo)
                     }
                 }
+            } else {
+                project.logger.info "Repository '${repo.name}' is not a MavenArtifactRepository"
             }
         }
+
+        if (repositories == null || repositories.isEmpty()) {
+            project.logger.info "No repositories found for project '${project.name}'"
+        }
     }

     private void createMirrorRepository(Project project, Mirror mirror) {
@@ -169,12 +177,15 @@ public class MavenSettingsPlugin implements Plugin<Project> {
         }
     }

-    private addCredentials(Server server, MavenArtifactRepository repo) {
+    private addCredentials(Project project, Server server, MavenArtifactRepository repo) {
         if (server?.username != null && server?.password != null) {
             repo.credentials {
                 username = server.username
                 password = server.password
             }
+            project.logger.info "Applied server '${server.id}' credentials to ${repo.name} repository"
+        } else {
+            project.logger.info "No valid credentials found for '${server.id}' in settings.xml, username and/or password is missing"
         }
     }
 }

[mark-vieira]

Some additional logging seems like a no-brainer to me. I'd appreciate a pull request for this if you wouldn't mind.