Basic gradle build structure

Change-Id: I07a8097955ad77d002663fcc62cc9a1988f2eaf5
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..519db66
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2012 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import org.opencord.gradle.rules.*
+import org.yaml.snakeyaml.Yaml
+
+allprojects {
+    apply plugin: 'base'
+    apply plugin: 'de.gesellix.docker'
+    //apply plugin: 'com.tmiyamon.config'
+
+    docker {
+        // dockerHost = System.env.DOCKER_HOST ?: 'unix:///var/run/docker.sock'
+        // dockerHost = System.env.DOCKER_HOST ?: 'https://192.168.99.100:2376'
+        // certPath = System.getProperty('docker.cert.path') ?: "${System.getProperty('user.home')}/.docker/machine/machines/default"
+        // authConfigPlain = [
+        //   "username"       : "joe",
+        //   "password"       : "some-pw-as-needed",
+        //   "email"          : "joe@acme.com",
+        //   "serveraddress"  : "https://index.docker.io/v1/"
+        //  ]
+    }
+}
+
+ext {
+
+    // Upstream registry to simplify filling out the comps table below
+    upstreamReg = project.hasProperty('upstreamReg') ? project.getProperty('upstreamReg') : 'docker.io'
+
+    // Target registry to be used to publish docker images needed for deployment
+    targetReg = project.hasProperty('targetReg') ? project.getProperty('targetReg') : 'localhost:5000'
+
+    // The tag used to tag the docker images push to the target registry
+    targetTag = project.hasProperty('targetTag') ? project.getProperty('targetTag') : 'candidate'
+
+    // Component table
+    comps = [
+    ]
+
+    // Deployment target config file (yaml format); this can be overwritten from the command line
+    // using the -PdeployConfig=<file-path> syntax.
+    deployConfig = project.hasProperty('deployConfig') ? project.getProperty('deployConfig') : './config/default.yml'
+
+}
+
+// ------------- PlaceHolders ----------------
+
+task updateDocker (type: Exec) {
+    commandLine 'sudo', 'utils/enable-remote-docker-registry', "$targetReg"
+}
+
+task prime {
+    // TODO this is a place-holder.
+    dependsOn updateDocker
+    doFirst {
+        println "Using deployment config: $deployConfig"
+        File configFile = new File(deployConfig)
+        def yaml = new Yaml()
+        def config = yaml.load(configFile.newReader())
+        println "Config: $config"
+        println "Access some data in config:\n\tSeed server IP=${config.seedServer.ip}"
+    }
+}
+
+// ---------------- Useful tasks ----------------
+
+task fetchUpstreamImages {
+    comps.each { name, spec -> if (spec.type == 'image') { dependsOn "fetch" + name } }
+}
+
+task fetchGitSubmodules {
+    comps.each { name, spec -> if (spec.type == 'gitmodule') { dependsOn "gitupdate" + name } }
+}
+
+task fetch {
+    dependsOn fetchUpstreamImages
+    dependsOn fetchGitSubmodules
+}
+
+task publishImages {
+    comps.each { name, spec -> if (spec.type == 'image') { dependsOn "publish" + name } }
+}
+
+task publish {
+    dependsOn publishImages
+}
+
+tasks.addRule(new DockerFetchRule(project))
+tasks.addRule(new DockerPublishRule(project))
+tasks.addRule(new DockerTagRule(project))
+tasks.addRule(new GitSubmoduleUpdateRule(project))
+
+task deploy {
+    // TODO this is a place-holder.
+    doFirst {
+        println "Using deployment config: $deployConfig"
+        File configFile = new File(deployConfig)
+        def yaml = new Yaml()
+        def config = yaml.load(configFile.newReader())
+        println "Config: $config"
+        println "Access some data in config:\n\tSeed server IP=${config.seedServer.ip}"
+    }
+}
+