SOLR-14847: Create Solr Server TGZ (#1844)

Create new targets for building solr binary release artifacts:

gradlew -p solr/packaging distTar distZip

Co-authored-by: Houston Putman <houston@apache.org>
Co-authored-by: Dawid Weiss <dawid.weiss@carrotsearch.com>
Co-authored-by: Mike Drob <mdrob@apache.org>

help/workflow.txt

@@ -29,7 +29,8 @@ ls -R build/maven-local/
 
 Put together Solr distribution:
 gradlew -p solr/packaging assemble
-ls solr/packaging/build/solr-*
+ls solr/packaging/build/distributions/solr-* # release archives
+ls solr/packaging/build/solr-*               # expanded directory
 
 
 Other validation and checks

solr/packaging/build.gradle

@@ -20,6 +20,7 @@
 
 plugins {
   id 'base'
+  id 'distribution'
 }
 
 description = 'Solr packaging'
@@ -64,7 +65,22 @@ dependencies {
   server project(path: ":solr:server", configuration: "packaging")
 }
 
-task toDir(type: Sync) {
+distributions {
+  main {
+    distributionBaseName = 'solr'
+    contents {
+      // Manually correct posix permissions (matters when packaging on Windows).
+      filesMatching([
+          "**/*.sh",
+          "**/bin/post",
+          "**/bin/postlogs",
+          "**/bin/solr",
+          "**/bin/init.d/solr",
+          "**/bin/solr-exporter",
+      ]) {
+        setMode 0755
+      }
+
       from(project(":solr").projectDir, {
         include "bin/**"
         include "licenses/**"
@@ -101,21 +117,24 @@ task toDir(type: Sync) {
       })
 
       // docs/   - TODO: this is assembled via XSLT... leaving out for now.
-
-  into distDir
-
-  doLast {
-    logger.lifecycle "Solr distribution assembled under: ${distDir}"
     }
   }
+}
+
+distTar {
+  compression = Compression.GZIP
+}
+
+installDist {
+  into distDir
+}
 
 task dev(type: Copy) {
   description "Assemble Solr distribution into 'development' folder at ${devDir}"
   group "build"
 
-  from toDir.outputs
+  from installDist.outputs
   into devDir
 }
 
-assemble.dependsOn toDir
-
+assemble.dependsOn installDist