Added githubSuppressPublicationWarning setting to better support reso…

…lver use-cases

README.md

@@ -130,5 +130,6 @@ The following setting keys are defined:
 - `githubRepository : String` The repository which hosts this project under the organization/user defined in the other setting
 - `githubActor : String` (*defaults to `GITHUB_ACTOR`*) *Your* GitHub username. This should almost never be specified in the build itself, but rather read from some external source. By default, it will read the `GITHUB_ACTOR` environment variable. To be extremely clear, this is the user who ran the `sbt` command, it is not *necessarily* the repository owner!
 - `githubTokenSource : TokenSource` (*defaults to `Environment("GITHUB_TOKEN")`*) Where the plugin should go to read the GitHub API token to use in authentication. `TokenSource` has two possible values: `Environment(variable: String)` and `GitConfig(key: String)`. You can compose multiple sources together using `||`, which will result in each being attempted in order from left to right. This is mostly just a convenience. You're free to do whatever you want. Just don't, like, put it in your build. 
+- `githubSuppressPublicationWarning : Boolean` (*defaults to `false`*) If you're just using this plugin as a means to *resolve* artifacts, not to publish them, the publication warning may serve as an annoyance more than anything else. Setting this to `true` will suppress the normal warning text when you fail to define `githubOwner` or `githubRepository`.
 
 `homepage` and `scmInfo` will be automatically set for you if `githubOwner` and `githubRepository` are themselves set.

src/main/scala/sbtghpackages/GitHubPackagesKeys.scala

@@ -24,6 +24,8 @@ trait GitHubPackagesKeys {
 
   val githubActor = settingKey[String]("The github user to use when authenticating (defaults to github.actor in the git config)")
   val githubTokenSource = settingKey[TokenSource]("Where to get the API token used in publication (defaults to github.token in the git config)")
+
+  val githubSuppressPublicationWarning = settingKey[Boolean]("Whether or not to suppress the publication warning (default: false, meaning the warning will be printed)")
 }
 
 object GitHubPackagesKeys extends GitHubPackagesKeys

src/main/scala/sbtghpackages/GitHubPackagesPlugin.scala

@@ -58,6 +58,7 @@ object GitHubPackagesPlugin extends AutoPlugin {
 
   val packagePublishSettings = Seq(
     publishTo := {
+      val suppress = githubSuppressPublicationWarning.value
       val log = streams.value.log
       val ms = publishMavenStyle.value
       val back = for {
@@ -73,7 +74,7 @@ object GitHubPackagesPlugin extends AutoPlugin {
 
       back orElse {
         GitHubPackagesPlugin synchronized {
-          if (!alreadyWarned) {
+          if (!alreadyWarned && !suppress) {
             log.warn("undefined keys `githubOwner` and `githubRepository`")
             log.warn("retaining pre-existing publication settings")
             alreadyWarned = true
@@ -132,4 +133,6 @@ object GitHubPackagesPlugin extends AutoPlugin {
     s"GitHub Package Registry (${owner}${if (repo != "_") s"/$repo" else ""})"
 
   override def projectSettings = packagePublishSettings
+
+  override def buildSettings = Seq(githubSuppressPublicationWarning := false)
 }