Start HTTP API on device.

lib/roles/device.js

@@ -72,6 +72,40 @@ module.exports = function(options) {
           })
       }))
     })
+    .then(function() {
+      log.info('Checking if any processes from a previous run are still up')
+      return devutil.killProcsByBin(adb, options.serial, vendor.bin.dest)
+    })
+    .then(function() {
+      var port = 2870
+      return adb.openTcpAsync(options.serial, port)
+        .then(function(conn) {
+          conn.end()
+          throw new Error(util.format('Old connection still lives on port %d', port))
+        })
+        .catch(function(err) {
+            if (err.message === 'closed') {
+            return adb.shellAsync(options.serial, [
+                vendor.bin.dest
+              , '--lib', vendor.lib.dest
+              , '--listen-http', port
+              ])
+              .then(function(out) {
+                out.pipe(require('split')())
+                  .on('data', function(chunk) {
+                    log.info('remote: "%s"', chunk)
+                  })
+                  .on('end', function() {
+                    log.fatal('remote: Connection closed')
+                    selfDestruct()
+                  })
+              })
+          }
+          else {
+            throw err
+          }
+        })
+    })
     .done(function() {
       log.info('Ready for instructions')
       poke()
@@ -163,6 +197,10 @@ module.exports = function(options) {
       wireutil.makeDevicePokeMessage(options.serial, solo)])
   }
 
+  function selfDestruct() {
+    process.exit(1)
+  }
+
   function gracefullyExit() {
     log.info('Bye')
     process.exit(0)