diff --git a/README.md b/README.md
index e614148..109a900 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![Maintainer Status](http://stillmaintained.com/akhikhl/unpuzzle.png)](http://stillmaintained.com/akhikhl/unpuzzle) 
 [![Build Status](https://travis-ci.org/akhikhl/unpuzzle.png?branch=master)](https://travis-ci.org/akhikhl/unpuzzle) 
-[![Latest Version](http://img.shields.io/badge/latest_version-0.0.11-3f6498.svg)](https://github.com/akhikhl/unpuzzle/tree/v0.0.11)
+[![Latest Version](http://img.shields.io/badge/latest_version-0.0.12-3f6498.svg)](https://github.com/akhikhl/unpuzzle/tree/v0.0.12)
 [![License](http://img.shields.io/badge/license-MIT-d63434.svg)](#copyright-and-license)
 
 **Unpuzzle** is a set of tools for mavenizing OSGi-bundles. You can consume Unpuzzle in two forms: 
diff --git a/build.gradle b/build.gradle
index 0f3b93e..b53c928 100644
--- a/build.gradle
+++ b/build.gradle
@@ -12,11 +12,23 @@ buildscript {
 
 ext {
   group = 'org.akhikhl.unpuzzle'
-  version = '0.0.11'
+  version = '0.0.12'
   groovy_version = '1.8.6'
   spock_version = '0.7-groovy-1.8'
+  
+  project_id = 'unpuzzle'
+  project_description = 'Tool for mavenizing OSGi-bundles'
+  developer_id = 'akhikhl'
+  developer_name = 'Andrey Hihlovskiy'
+  project_website = "https://github.com/${developer_id}/${project_id}"
+  project_scm = "scm:git@github.com:${developer_id}/${project_id}.git"
+  license = 'The MIT License'
+  license_url = "https://raw.github.com/${developer_id}/${project_id}/master/LICENSE"
+  labels = ['unpuzzle', 'gradle', 'plugin', 'eclipse', 'osgi', 'maven']
 }
 
+description = ext.project_description
+
 apply plugin: 'base' // add "clean" task to the root project.
 
 task('build')
@@ -35,134 +47,3 @@ task('cleanExamples', type: GradleBuild) { task ->
 
 // clean.dependsOn cleanExamples
 
-subprojects {
-  if(project.parent.name == 'libs') {
-
-    apply plugin: 'maven'
-    apply plugin: 'groovy'
-    apply plugin: 'signing'
-    apply plugin: 'maven-publish'
-    apply plugin: 'bintray'
-
-    repositories {
-      mavenLocal()
-      jcenter()
-      mavenCentral()
-    }
-
-    group = rootProject.ext.group
-    version = rootProject.ext.version
-
-    dependencies {
-      compile "org.codehaus.groovy:groovy-all:${rootProject.ext.groovy_version}"
-      testCompile "org.spockframework:spock-core:${rootProject.ext.spock_version}"
-    }
-
-    // lib projects should be always installed into "$HOME/.m2"
-    project.tasks.build.finalizedBy project.tasks.install
-    rootProject.tasks.buildExamples.dependsOn project.tasks.install
-
-    task sourcesJar(type: Jar, dependsOn: classes, description: 'Creates sources jar') {
-      classifier = 'sources'
-      from sourceSets.main.allSource
-    }
-
-    task javadocJar(type: Jar, description: 'Creates javadoc jar') {
-      dependsOn javadoc
-      classifier = 'javadoc'
-      from javadoc.destinationDir
-      if(tasks.findByName('groovydoc')) {
-        dependsOn groovydoc
-        from groovydoc.destinationDir
-      }
-    }
-
-    artifacts {
-      archives sourcesJar, javadocJar
-    }
-
-    if(project.hasProperty('publishToSonatype')) {
-
-      assert project.hasProperty('signing.keyId')
-      assert project.hasProperty('signing.password')
-      assert project.hasProperty('signing.secretKeyRingFile')
-      assert project.hasProperty('sonatypeUsername')
-      assert project.hasProperty('sonatypePassword')
-
-      signing {
-        sign configurations.archives
-      }
-
-      uploadArchives {
-        repositories {
-          mavenDeployer {
-            beforeDeployment { deployment -> signing.signPom(deployment) }
-
-            repository(url: 'https://oss.sonatype.org/service/local/staging/deploy/maven2/') {
-              authentication(userName: project.sonatypeUsername, password: project.sonatypePassword)
-            }
-
-            pom.project {
-              name project.name
-              packaging 'jar'
-              description 'Tools for mavenizing OSGi-bundles'
-              url 'https://github.com/akhikhl/unpuzzle'
-
-              scm {
-                url 'scm:https://github.com/akhikhl/unpuzzle.git'
-                connection 'scm:https://github.com/akhikhl/unpuzzle.git'
-                developerConnection 'scm:git@github.com:akhikhl/unpuzzle.git'
-              }
-
-              licenses {
-                license {
-                  name 'The MIT License'
-                  url 'https://raw.github.com/akhikhl/unpuzzle/master/license.txt'
-                  distribution 'repo'
-                }
-              }
-
-              developers {
-                developer {
-                  id 'akhikhl'
-                  name 'Andrey Hihlovskiy'
-                }
-              }
-            }
-          }
-        }
-      } // uploadArchives
-    } // publishToSonatype
-
-    // used by bintray
-    publishing {
-      publications {
-        mavenAll(MavenPublication) {
-          if (plugins.hasPlugin('java')) {
-            from components.java
-          }
-          artifact sourcesJar {
-            classifier "sources"
-          }
-          artifact javadocJar {
-            classifier "javadoc"
-          }
-        }
-      }
-    } // publishing
-
-    bintray {
-      user = project.hasProperty('bintrayUser') ? project.bintrayUser : ''
-      key = project.hasProperty('bintrayKey') ? project.bintrayKey : ''
-      publications = ['mavenAll'] // When uploading Maven-based publication files
-      pkg {
-        repo = 'maven'
-        name = 'unpuzzle'
-        desc = 'Tools for mavenizing OSGi-bundles'
-        licenses = ['MIT']
-        labels = ['unpuzzle', 'gradle', 'plugin', 'osgi', 'eclipse']
-      }
-      dryRun = false
-    }
-  } // if libs
-} // subprojects
diff --git a/libs/common.gradle b/libs/common.gradle
new file mode 100644
index 0000000..85b9946
--- /dev/null
+++ b/libs/common.gradle
@@ -0,0 +1,43 @@
+// include this file in subprojects:
+// apply from: rootProject.file('libs/common.gradle')
+
+apply plugin: 'maven'
+apply plugin: 'groovy'
+
+repositories {
+  mavenLocal()
+  jcenter()
+  mavenCentral()
+}
+
+group = rootProject.ext.group
+version = rootProject.ext.version
+
+dependencies {
+  compile "org.codehaus.groovy:groovy-all:${rootProject.ext.groovy_version}"
+  testCompile "org.spockframework:spock-core:${rootProject.ext.spock_version}"
+}
+
+// lib projects should be always installed into "$HOME/.m2"
+project.tasks.build.finalizedBy project.tasks.install
+rootProject.tasks.buildExamples.dependsOn project.tasks.install
+
+task sourcesJar(type: Jar, dependsOn: classes, description: 'Creates sources jar') {
+  classifier = 'sources'
+  from sourceSets.main.allSource
+}
+
+task javadocJar(type: Jar, description: 'Creates javadoc jar') {
+  dependsOn javadoc
+  classifier = 'javadoc'
+  from javadoc.destinationDir
+  if(tasks.findByName('groovydoc')) {
+    dependsOn groovydoc
+    from groovydoc.destinationDir
+  }
+}
+
+artifacts {
+  archives sourcesJar, javadocJar
+}
+
diff --git a/libs/publish.gradle b/libs/publish.gradle
new file mode 100644
index 0000000..b4cd3e1
--- /dev/null
+++ b/libs/publish.gradle
@@ -0,0 +1,70 @@
+// include this file in subprojects:
+// apply from: rootProject.file('libs/publish.gradle')
+
+apply plugin: 'signing'
+apply plugin: 'maven-publish'
+apply plugin: 'bintray'
+
+import org.gradle.api.internal.artifacts.publish.DefaultPublishArtifact
+
+def thisProject = project
+
+install.repositories.mavenInstaller.pom*.whenConfigured { pom ->
+  pom.project {
+    name thisProject.name
+    packaging 'jar'
+    description thisProject.project_description
+    url thisProject.project_website
+
+    scm {
+      url thisProject.project_scm
+      connection thisProject.project_scm
+      developerConnection thisProject.project_scm
+    }
+
+    licenses {
+      license {
+        name thisProject.license
+        url thisProject.license_url
+        distribution 'repo'
+      }
+    }
+
+    developers {
+      developer {
+        id thisProject.developer_id
+        name thisProject.developer_name
+      }
+    }
+  }
+}
+
+bintray {
+  user = project.hasProperty('bintrayUser') ? project.bintrayUser : ''
+  key = project.hasProperty('bintrayKey') ? project.bintrayKey : ''
+  configurations = ['archives']
+  pkg {
+    repo = 'maven'
+    name = thisProject.rootProject.project_id
+    desc = thisProject.rootProject.description
+    licenses = ['MIT']
+    labels = thisProject.rootProject.labels
+  }
+  dryRun = false
+}
+
+bintrayUpload {
+  doFirst {
+    def signatureArtifacts = []
+    collectArtifacts(project.configurations.archives).each { a ->
+      def s = signing.sign(a.file)
+      s.signatureFiles.each { f ->
+        def fname = f.name
+        def ext = fname.substring(fname.lastIndexOf('.') + 1)
+        signatureArtifacts.add(new DefaultPublishArtifact(a.name, a.extension + '.' + ext, ext, a.classifier, new Date(), f, [] as Object[]))
+      }
+    }
+    project.configurations.archives.artifacts.addAll(signatureArtifacts)
+  }
+}
+
diff --git a/libs/unpuzzle-eclipse2maven/build.gradle b/libs/unpuzzle-eclipse2maven/build.gradle
index 2af5d58..fc28114 100644
--- a/libs/unpuzzle-eclipse2maven/build.gradle
+++ b/libs/unpuzzle-eclipse2maven/build.gradle
@@ -1,4 +1,5 @@
-apply plugin: 'groovy'
+apply from: rootProject.file('libs/common.gradle')
+apply from: rootProject.file('libs/publish.gradle')
 
 dependencies {
   compile project(':libs:unpuzzle-osgi2maven')
diff --git a/libs/unpuzzle-osgi2maven/build.gradle b/libs/unpuzzle-osgi2maven/build.gradle
index 27e387d..1fe46d9 100644
--- a/libs/unpuzzle-osgi2maven/build.gradle
+++ b/libs/unpuzzle-osgi2maven/build.gradle
@@ -1,7 +1,8 @@
-apply plugin: 'groovy'
+apply from: rootProject.file('libs/common.gradle')
+apply from: rootProject.file('libs/publish.gradle')
 
 dependencies {
   compile 'org.osgi:org.osgi.core:5.0.0'
   compile 'org.apache.maven:maven-ant-tasks:2.1.3'
   testCompile 'xmlunit:xmlunit:1.4'
-}
\ No newline at end of file
+}
diff --git a/libs/unpuzzle-plugin/build.gradle b/libs/unpuzzle-plugin/build.gradle
index 23561d6..d0a1613 100644
--- a/libs/unpuzzle-plugin/build.gradle
+++ b/libs/unpuzzle-plugin/build.gradle
@@ -1,3 +1,6 @@
+apply from: rootProject.file('libs/common.gradle')
+apply from: rootProject.file('libs/publish.gradle')
+
 dependencies {
   compile project(':libs:unpuzzle-eclipse2maven')
   compile gradleApi()
diff --git a/libs/unpuzzle-utils/build.gradle b/libs/unpuzzle-utils/build.gradle
index c21e46d..b6c8d8e 100644
--- a/libs/unpuzzle-utils/build.gradle
+++ b/libs/unpuzzle-utils/build.gradle
@@ -1,4 +1,5 @@
-apply plugin: 'groovy'
+apply from: rootProject.file('libs/common.gradle')
+apply from: rootProject.file('libs/publish.gradle')
 
 dependencies {
   compile 'commons-io:commons-io:2.4'
diff --git a/libs/unpuzzle-utils/src/main/groovy/org/akhikhl/unpuzzle/utils/Downloader.groovy b/libs/unpuzzle-utils/src/main/groovy/org/akhikhl/unpuzzle/utils/Downloader.groovy
index e67823e..e4a3cd9 100644
--- a/libs/unpuzzle-utils/src/main/groovy/org/akhikhl/unpuzzle/utils/Downloader.groovy
+++ b/libs/unpuzzle-utils/src/main/groovy/org/akhikhl/unpuzzle/utils/Downloader.groovy
@@ -65,7 +65,12 @@ final class Downloader {
   }
 
   void downloadFile(URL url, File file) throws IOException {
-    long remoteContentLength = Long.parseLong(url.openConnection().getHeaderField('Content-Length'))
+    Long remoteContentLength
+    try {
+      remoteContentLength = Long.parseLong(url.openConnection().getHeaderField('Content-Length'))
+    } catch(NumberFormatException e) {
+      // no header, download anyway
+    }
     if (file.exists() && remoteContentLength == file.length()) {
       console.info("File ${file.getName()} already downloaded, skipping download")
       return
diff --git a/pluginScripts/unpuzzle-0.0.12.plugin b/pluginScripts/unpuzzle-0.0.12.plugin
new file mode 100644
index 0000000..b639f05
--- /dev/null
+++ b/pluginScripts/unpuzzle-0.0.12.plugin
@@ -0,0 +1,19 @@
+buildscript {
+  repositories {
+    mavenLocal()
+    jcenter()
+    mavenCentral()
+  }
+  
+  dependencies {
+    classpath 'org.akhikhl.unpuzzle:unpuzzle-plugin:0.0.12'
+  }
+}
+
+// apply plugin: 'unpuzzle-plugin'
+
+import org.akhikhl.unpuzzle.UnpuzzlePlugin
+
+if (!project.plugins.findPlugin(UnpuzzlePlugin))
+  project.apply(plugin: UnpuzzlePlugin)
+