diff --git a/build.gradle b/build.gradle
index 1781e46d22b..3adf267ca5d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -26,12 +26,25 @@ plugins {
   id "de.undercouch.download" version "4.0.2" apply false
 }
 
-// Project version and main properties. Applies to all projects.
+// Project version.
+version = "9.0.0-SNAPSHOT"
+
+// Propagate version and derived properties across projects.
 allprojects {
-  version = "9.0.0-SNAPSHOT"
+  version = rootProject.version
 }
 
 ext {
+  // "base" version is stripped of the qualifier. Compute it.
+  baseVersion = {
+    def m = (version =~ /^(\d+\.\d+\.\d+)(-(.+))?/)
+    if (!m) {
+      throw GradleException("Can't strip version to just x.y.z: " + rootProject.version)
+    }
+    return m[0][1]
+  }()
+
+  // Build timestamp.
   def tstamp = ZonedDateTime.now()
   buildDate = DateTimeFormatter.ofPattern("yyyy-MM-dd").format(tstamp)
   buildTime = DateTimeFormatter.ofPattern("HH:mm:ss").format(tstamp)
@@ -70,6 +83,7 @@ apply from: file('gradle/testing/defaults-tests.gradle')
 apply from: file('gradle/testing/randomization.gradle')
 apply from: file('gradle/testing/fail-on-no-tests.gradle')
 apply from: file('gradle/testing/runtime-jvm-support.gradle')
+apply from: file('gradle/jar-manifest.gradle')
 
 // Maven publishing.
 apply from: file('gradle/maven/defaults-maven.gradle')
diff --git a/gradle/jar-manifest.gradle b/gradle/jar-manifest.gradle
new file mode 100644
index 00000000000..bf8e6816223
--- /dev/null
+++ b/gradle/jar-manifest.gradle
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+// Configures JAR manifest entries
+
+allprojects {
+    // Declare these inline for now. Don't know if it makes sense to declare them
+    // per-project.
+    def title;
+    def implementationTitle;
+    def legaleseDir;
+    if (project.path.startsWith(":lucene")) {
+        implementationTitle = "org.apache.lucene"
+        title = "Lucene Search Engine: ${project.name}"
+        legaleseDir = project(":lucene").projectDir
+    } else {
+        implementationTitle = "org.apache.solr"
+        title = "Apache Solr Search Server: ${project.name}"
+        legaleseDir = project(":solr").projectDir
+    }
+
+    // Apply the manifest to any JAR or WAR file created by any project,
+    // excluding those explicitly listed.
+    tasks.withType(Jar)
+            .matching { t -> !["sourcesJar", "javadocJar"].contains(t.name) }
+            .configureEach { task ->
+                // Compute git status once on the root project prior to assembling manifest.
+                dependsOn ":gitStatus"
+
+                // Because git status is a task we must defer computing this
+                // until status has been computed. We do this with a provider.
+                def implementationVersion = provider {
+                    "${project.version} ${rootProject.gitRev} - ${System.properties['user.name']} - ${buildDate} ${buildTime}"
+                }
+
+                manifest {
+                    attributes([
+                            "Extension-Name"        : implementationTitle,
+
+                            "Implementation-Vendor" : "The Apache Software Foundation",
+                            "Implementation-Title"  : implementationTitle,
+                            "Implementation-Version": implementationVersion,
+
+                            "Specification-Vendor"  : "The Apache Software Foundation",
+                            "Specification-Version" : project.baseVersion,
+                            "Specification-Title"   : title,
+
+                            "X-Compile-Source-JDK"  : "${project.sourceCompatibility}",
+                            "X-Compile-Target-JDK"  : "${project.targetCompatibility}",
+
+                            "X-Build-JDK"           : "${System.properties['java.version']} (${System.properties['java.vendor']} ${System.properties['java.vm.version']})",
+                            "X-Build-OS"            : "${System.properties['os.name']} ${System.properties['os.arch']} ${System.properties['os.version']}"
+                    ])
+                }
+
+                // Copy legalese into META-INF.
+                metaInf {
+                    from(legaleseDir, {
+                      include "LICENSE.txt"
+                      include "NOTICE.txt"
+                    })
+                }
+            }
+}
\ No newline at end of file
diff --git a/gradle/testing/randomization.gradle b/gradle/testing/randomization.gradle
index 02fc9e8332f..0f36bae78fb 100644
--- a/gradle/testing/randomization.gradle
+++ b/gradle/testing/randomization.gradle
@@ -39,15 +39,6 @@ configure(rootProject) {
     rootSeed = propertyOrDefault('tests.seed', String.format("%08X", new Random().nextLong()))
     rootSeedLong = SeedUtils.parseSeedChain(rootSeed)[0]
     projectSeedLong = rootSeedLong ^ project.path.hashCode()
-
-    // "base" version is stripped of the qualifier. Compute it.
-    baseVersion = {
-      def m = (rootProject.version =~ /^(\d+\.\d+\.\d+)(-(.+))?/)
-      if (!m) {
-        throw GradleException("Can't strip version to just x.y.z: " + rootProject.version)
-      }
-      return m[0][1]
-    }()
   }
 
   task randomizationInfo() {
diff --git a/gradle/validation/git-status.gradle b/gradle/validation/git-status.gradle
index 5706b0adc7f..79a26fa48be 100644
--- a/gradle/validation/git-status.gradle
+++ b/gradle/validation/git-status.gradle
@@ -31,30 +31,37 @@ buildscript {
   }
 }
 
-def gitStatus(dir) {
-  try {
-    def repository = new FileRepositoryBuilder()
-        .setWorkTree(dir)
-        .setMustExist(true)
-        .build()
-
-    def status = new Git(repository).status().call()
-    return status
-  } catch (RepositoryNotFoundException | NoWorkTreeException e) {
-    logger.warn("WARNING: Directory is not a valid GIT checkout (won't check dirty files): ${dir}")
-    return null
-  } catch (NotSupportedException e) {
-    throw new GradleException("jgit does not support git repository version at this location: ${dir}", e)
-  }
-}
-
 configure(rootProject) {
+  task gitStatus() {
+    doFirst {
+      try {
+        def repository = new FileRepositoryBuilder()
+                .setWorkTree(rootProject.projectDir)
+                .setMustExist(true)
+                .build()
+
+        def ref = repository.findRef("HEAD").getObjectId()
+        project.ext.gitRev = ref.name()
+        project.ext.gitRevShort = ref.abbreviate(8).name()
+        project.ext.gitStatus = new Git(repository).status().call()
+      } catch (RepositoryNotFoundException | NoWorkTreeException e) {
+        project.ext.gitRev = "(not a git checkout)"
+        project.ext.gitRevShort = "(not a git checkout)"
+        project.ext.gitStatus = null
+      } catch (NotSupportedException e) {
+        throw new GradleException("jgit does not support git repository version at this location: ${dir}", e)
+      }
+    }
+  }
+
   // Verify git working copy does not have any unstaged modified files.
   task checkWorkingCopyClean() {
+    dependsOn gitStatus
     doFirst {
-      def status = gitStatus(rootProject.projectDir)
+      def status = rootProject.ext.gitStatus
       if (status == null) {
         // Ignore the check. This isn't a git checkout.
+        logger.warn("WARNING: Directory is not a valid GIT checkout (won't check dirty files): ${rootProject.projectDir}")
       } else {
         def offenders = [
             // Exclude staged changes. These are fine in precommit.