Fix build for Sonatype deployment

README.md

@@ -137,8 +137,39 @@ val e = b + ("F" -> "G")                     // A: 7, F: G
 val f = a - "A"                              // D: E
 ```
 
-## Build scripts
+## Information for developers
+
+### Build scripts
 
 `./sbt` to launch the build tool (SBT).
 
 `./checkstyle` to run Checkstyle.
+
+### Deploying
+
+#### Setting up SBT
+
+Add your Sonatype login to `~/.sbt/0.13/sonatype.sbt`:
+
+```
+credentials += Credentials(
+  "Sonatype Nexus Repository Manager", "oss.sonatype.org",
+  "your-username", "your-password")
+```
+
+Optionally, include the passphrase for the PGP key.
+
+```
+pgpPassphrase := Some("your-pgp-passphrase".toArray)
+```
+
+#### Publishing to Sonatype
+
+`./sbt publish`
+
+This creates a staging repository at
+https://oss.sonatype.org/index.html#stagingRepositories
+
+*Close* the staging repository.
+
+If all is well, you can then *Release* the repository.

project/Build.scala

@@ -131,15 +131,18 @@ object Build extends Build {
 
   lazy val scalajHttp = "org.scalaj" % "scalaj-http_2.10" % "0.3.10"
 
-  lazy val unpublished: Seq[Setting[_]] = Seq(
-    publishArtifact := false,
-    publishArtifact in makePom := false,
-    publish := {},
-    publishLocal := {}
-  )
+  lazy val unpublished: Seq[Setting[_]] = {
+    Seq(
+      publishArtifact := false,
+      publishArtifact in makePom := false,
+      publish := {},
+      publishLocal := {}
+    )
+  }
 
   lazy val published: Seq[Setting[_]] = Seq(
     publishMavenStyle := true,
+    publish <<= com.typesafe.sbt.pgp.PgpKeys.publishSigned,
     publishTo := {
       val nexus = "https://oss.sonatype.org/"
       if (version.value.trim.endsWith("SNAPSHOT"))

project/plugins.sbt

@@ -1 +1,3 @@
 addSbtPlugin("de.johoop" % "findbugs4sbt" % "1.2.1")
+
+addSbtPlugin("com.typesafe.sbt" % "sbt-pgp" % "0.8")