Made maven plugin use all dependencies from local repo

So that it is able to depend on snapshot version of lib and lib-extra.
All compile dependencies with transitives are now installed into local
maven repo. This repo is used both for building and testing the plugin.

plugin-maven/build.gradle

@@ -17,6 +17,8 @@ final BUILD_DIR = project.buildDir.toString()
 final MAVEN_PROJECT_DIR = "${BUILD_DIR}/mavenProject"
 final LOCAL_MAVEN_REPO_DIR = "${BUILD_DIR}/localMavenRepository"
 
+final SPOTLESS_LIB_VERSION = "1.0.0-SNAPSHOT" // should be project.stableLib once maven plugin stabilizes
+
 buildscript {
 	repositories { mavenCentral() }
 	dependencies { classpath "com.github.spullara.mustache.java:compiler:${VER_MUSTACHE}" }
@@ -46,13 +48,58 @@ task copySourceFiles(type: Copy) {
 	into "${MAVEN_PROJECT_DIR}/src/main/java"
 }
 
-task createPomXml {
+// this task is temporary, it should be removed once maven plugin stabilizes
+// and can depend on released version of lib and lib-extra
+task installAllCompileDependenciesInLocalMavenRepo
+
+project.configurations.compile.resolvedConfiguration.resolvedArtifacts.each {
+	def groupId = it.moduleVersion.id.group
+	def artifactId = it.moduleVersion.id.name
+	def version = it.moduleVersion.id.version
+	def file = it.file
+
+	if (artifactId == "lib" || artifactId == "lib-extra") {
+		artifactId = "spotless-" + artifactId
+		version = SPOTLESS_LIB_VERSION
+	}
+
+	def installDependency = task "install_${artifactId}"(type: Exec) {
+		commandLine "mvn", "org.apache.maven.plugins:maven-install-plugin:2.3.1:install-file",
+				"-Dfile=${file}",
+				"-DgroupId=${groupId}",
+				"-DartifactId=${artifactId}",
+				"-Dversion=${version}",
+				"-Dpackaging=jar",
+				"-DlocalRepositoryPath=${LOCAL_MAVEN_REPO_DIR}"
+	}
+
+	installAllCompileDependenciesInLocalMavenRepo.dependsOn installDependency
+}
+
+task createPomXml(dependsOn: installAllCompileDependenciesInLocalMavenRepo) {
 	doLast {
+		def additionalDependencies = project.configurations.compile.resolvedConfiguration.resolvedArtifacts.findAll {
+			def artifactId = it.moduleVersion.id.name
+			return artifactId != "lib" && artifactId != "lib-extra"
+		}.collect {
+			def groupId = it.moduleVersion.id.group
+			def artifactId = it.moduleVersion.id.name
+			def version = it.moduleVersion.id.version
+
+			return "<dependency>\n" +
+					"      <groupId>${groupId}</groupId>\n" +
+					"      <artifactId>${artifactId}</artifactId>\n" +
+					"      <version>${version}</version>\n" +
+					"    </dependency>\n"
+		}.join("\n")
+
 		def versions = [
 			SpotlessMavenPluginVersion: project.versionMaven,
 			MavenApiVersion           : VER_MAVEN_API,
 			EclipseAetherVersion      : VER_ECLIPSE_AETHER,
-			SpotlessLibVersion        : project.stableLib
+			SpotlessLibVersion        : SPOTLESS_LIB_VERSION,
+			additionalDependencies    : additionalDependencies,
+			localMavenRepositoryDir   : LOCAL_MAVEN_REPO_DIR
 		]
 
 		def pomXmlTemplate = Paths.get(PROJECT_DIR, "src", "main", "resources", "pom.xml.mustache")
@@ -88,7 +135,7 @@ task createLocalMavenRepositoryForTests(type: Exec, dependsOn: buildMavenPlugin)
 			"-DgroupId=com.diffplug.spotless",
 			"-DartifactId=spotless",
 			"-Dversion=${project.versionMaven}",
-			"-Dpackaging=paven-plugin",
+			"-Dpackaging=maven-plugin",
 			"-DlocalRepositoryPath=${LOCAL_MAVEN_REPO_DIR}"
 }
 

plugin-maven/src/main/resources/pom.xml.mustache

@@ -20,6 +20,23 @@
     <spotless.lib.version>{{SpotlessLibVersion}}</spotless.lib.version>
   </properties>
 
+  <repositories>
+    <repository>
+      <id>local-repo</id>
+      <url>file://{{localMavenRepositoryDir}}</url>
+      <releases>
+        <enabled>true</enabled>
+        <updatePolicy>always</updatePolicy>
+        <checksumPolicy>ignore</checksumPolicy>
+      </releases>
+      <snapshots>
+        <enabled>true</enabled>
+        <updatePolicy>always</updatePolicy>
+        <checksumPolicy>ignore</checksumPolicy>
+      </snapshots>
+    </repository>
+  </repositories>
+
   <dependencies>
     <dependency>
       <groupId>org.apache.maven</groupId>
@@ -56,6 +73,9 @@
       <artifactId>spotless-lib-extra</artifactId>
       <version>${spotless.lib.version}</version>
     </dependency>
+
+    {{{additionalDependencies}}}
+
   </dependencies>
 
   <build>