My question is: Why can't I publish from SBT to my server via SSH?
Context:
I am developing a scala library and I want to publish it to a remote repository with SBT v0.12.3 over SSH (using an SFTP resolver). The relevant portion of my project/Build.scala SBT settings file is configured as prescribed by https://github.com/harrah/xsbt/wiki/Resolvers:
publishTo <<= version { v =>
Some(Resolver.sftp(
"My Repository",
"example.com",
"/var/www/public_html/repositories/" + (
if (v.trim.endsWith("SNAPSHOT")) { "snapshots" } else { "releases" }
)
))
},
resolvers ++= Seq(
{
import java.io.File
val privateKeyFile: File = new File(sys.env("HOME") + "/.ssh/id_rsa")
Resolver.ssh("scala-sh", "example.com") as("my-username", privateKeyFile) withPermissions("0644")
},
...
),
When I run sbt publish, things go fine until the authorization, where it still attempts to prompt me for login/password. When I run it locally, it brings up the username/password prompt, and when I try to publish remotely while SSH'd in to a machine it fails with a java.awt.HeadlessException. The result appears to be that the desired private-key type of authentication is not being attempted.
Here is a log of the remote session publish attempt:
> sbt-version
[info] 0.12.3
> publish
[info] Packaging /home/me/my-lib/target/scala-2.10.1/my-lib_2.10.1-SNAPSHOT-sources.jar ...
[info] Done packaging.
[info] Wrote /home/me/my-lib/target/scala-2.10.1/my-lib_2.10.1-SNAPSHOT.pom
[info] :: delivering :: org.example#my-lib_2.10.1;SNAPSHOT :: SNAPSHOT :: release :: Sun Apr 21 12:48:59 PDT 2013
[info] delivering ivy file to /home/me/my-lib/target/scala-2.10.1/ivy-SNAPSHOT.xml
[info] Generating API documentation for main sources...
model contains 75 documentable templates
[info] API documentation generation successful.
[info] Packaging /home/me/my-lib/target/scala-2.10.1/my-lib_2.10.1-SNAPSHOT-javadoc.jar ...
[info] Done packaging.
[info] Packaging my-lib-SNAPSHOT.jar ...
[info] Done packaging.
[trace] Stack trace suppressed: run last *:publish for the full output.
[error] (*:publish) java.awt.HeadlessException:
[error] No X11 DISPLAY variable was set, but this program performed an operation which requires it.
[error] Total time: 35 s, completed Apr 21, 2013 12:49:33 PM
It fails because there is no X11 display. This is unexpected behavior because the SBT project configuration is set to use private key authentication (see resolvers above).
So far I can think of 2 possible causes for the problem, detailed below.
Possible cause #1: Misconfiguration of SBT
Is there a problem in my configuration above?
Possible cause #2: Hitting an Ivy bug from an old version
At time of writing, I am using the latest SBT, 0.12.3. Maybe the version of Ivy being used by SBT is old. The more I think about it, the less likely this seems, but I haven't been able to rule it out yet.
How can I find out what version of Ivy SBT is using?
and then..
IF it is old, is there a way to get SBT to use a newer version of ivy?
There is another relevant question, see ivy ssh publisher, which references[0] an Old Ivy bug which caused java.awt.HeadlessExceptions.
"Which version of Ivy are you using? There is a Jira Bug for Version 2.0 : issues.apache.org/jira/browse/IVY-783 which should be fixed now."
"Seems like if I upgrade to ivy 2.3 rc-2. SSH publish works."
