Update to account for credentials and more constants.

project/build.properties

@@ -1 +1 @@
-sbt.version=1.9.8
+sbt.version=1.9.9

project/plugins.sbt

@@ -1 +1,24 @@
-credentials += Credentials(Path.userHome / ".sbt" / ".credentials")
+def selectCredentials(): Credentials =
+  if ((Path.userHome / ".sbt" / ".credentials").exists())
+    Credentials(Path.userHome / ".sbt" / ".credentials")
+  else
+    Credentials.apply(
+      realm = "Reposilite",
+      host = "maven.garrity.co",
+      userName = sys.env
+        .get("GS_MAVEN_USER")
+        .getOrElse(
+          throw new RuntimeException(
+            "You must either provide ~/.sbt/.credentials or specify the GS_MAVEN_USER environment variable."
+          )
+        ),
+      passwd = sys.env
+        .get("GS_MAVEN_TOKEN")
+        .getOrElse(
+          throw new RuntimeException(
+            "You must either provide ~/.sbt/.credentials or specify the GS_MAVEN_TOKEN environment variable."
+          )
+        )
+    )
+
+credentials += selectCredentials()

src/main/scala/gs/Gs.scala

@@ -34,11 +34,31 @@ object Gs {
     */
   val GitHost: String = "git.garrity.co"
 
+  /**
+    * Host of the Maven server.
+    */
+  val MavenHost: String = "maven.garrity.co"
+
+  /**
+    * Realm of the Maven server.
+    */
+  val MavenRealm: String = "Reposilite"
+
   /**
     * Organization name used to organize projects in Git.
     */
   val GitOrganization: String = "garrity-software"
 
+  /**
+    * Human readable organization name.
+    */
+  val OrganizationName: String = "Garrity Software"
+
+  /**
+    * Maven Group ID for GS projects.
+    */
+  val GroupId: String = "gs"
+
   /**
     * Calculate the Git repository for a project.
     *
@@ -56,4 +76,9 @@ object Gs {
     */
   def gitSsh(projectName: String): String =
     s"git@$GitHost:$GitOrganization/${projectName}.git"
+
+  object Environment {
+    val MavenUser: String = "GS_MAVEN_USER"
+    val MavenToken: String = "GS_MAVEN_TOKEN"
+  }
 }

src/main/scala/gs/GsPlugin.scala

@@ -10,7 +10,40 @@ object GsPlugin extends AutoPlugin {
 
   import autoImport._
 
+  /**
+    * Prefers to load credentials from file, if a file is available. Otherwise
+    * mandates that the following environment variables exist:
+    *
+    *   - `GS_MAVEN_USER`
+    *   - `GS_MAVEN_TOKEN`
+    *
+    * @return The selected credentials for GS Maven.
+    */
+  def selectCredentials(): Credentials =
+    if ((Path.userHome / ".sbt" / ".credentials").exists())
+      Credentials(Path.userHome / ".sbt" / ".credentials")
+    else
+      Credentials.apply(
+        realm =Gs.MavenRealm,
+        host = Gs.MavenHost,
+        userName = sys.env
+          .get(Gs.Environment.MavenUser)
+          .getOrElse(
+            throw new RuntimeException(
+              s"You must either provide ~/.sbt/.credentials or specify the ${Gs.Environment.MavenUser} environment variable."
+            )
+          ),
+        passwd = sys.env
+          .get(Gs.Environment.MavenToken)
+          .getOrElse(
+            throw new RuntimeException(
+              s"You must either provide ~/.sbt/.credentials or specify the ${Gs.Environment.MavenToken} environment variable."
+            )
+          )
+        )
+
   override def projectSettings: Seq[Setting[_]] = Seq(
+    credentials += selectCredentials(),
     publishMavenStyle := true,
     Test / Keys.publishArtifact := false,
     pomIncludeRepository := Function.const(false),
@@ -22,8 +55,8 @@ object GsPlugin extends AutoPlugin {
     ),
     licenses := List(Gs.Apache2),
     homepage := Some(url(Gs.gitRepo(gsProjectName.value))),
-    organizationName := "garrity software",
-    organization := "gs",
+    organizationName := Gs.OrganizationName,
+    organization := Gs.GroupId,
     organizationHomepage := Some(url("https://garrity.co/")),
     publishTo := {
       val repo = "https://maven.garrity.co/"