pipeline: upload builds to S3

This is a first step towards switching to S3. We still rsync to the
artifact server, but we also upload new builds to S3. Once we confirm
this works nicely, we can switch over to using `buildprep` and
completely wean off the artifact server.

Jenkinsfile

@@ -28,6 +28,8 @@ properties([
     ])
 ])
 
+def s3_builddir = "fcos-builds/prod/streams/${params.STREAM}"
+
 podTemplate(cloud: 'openshift', label: 'coreos-assembler', yaml: pod, defaultContainer: 'jnlp') {
     node('coreos-assembler') { container('coreos-assembler') {
 
@@ -43,12 +45,19 @@ podTemplate(cloud: 'openshift', label: 'coreos-assembler', yaml: pod, defaultCon
             if (!devel) {
                 // make sure our cached version matches prod exactly before continuing
                 utils.rsync_in("builds", "builds")
+
+                /*
+                utils.shwrap("""
+                coreos-assembler buildprep s3://${s3_builddir}
+                """)
+                */
             }
 
             utils.shwrap("""
             git -C src/config pull
             coreos-assembler fetch
             """)
+
         }
 
         def prevBuildID = null
@@ -129,6 +138,12 @@ podTemplate(cloud: 'openshift', label: 'coreos-assembler', yaml: pod, defaultCon
             // https://stackoverflow.com/questions/1636889
             if (!devel) {
                 utils.rsync_out("builds", "builds")
+                if (utils.path_exists("/.aws")) {
+                  // XXX: just upload as public-read for now
+                  utils.shwrap("""
+                  coreos-assembler upload s3 --acl=public-read ${s3_builddir}
+                  """)
+                }
             }
         }
     }}