Teach the build about betas and rcs

build.gradle

@@ -84,7 +84,8 @@ for (String line : versionLines) {
     int major = Integer.parseInt(match.group(1))
     int minor = Integer.parseInt(match.group(2))
     int bugfix = Integer.parseInt(match.group(3))
-    Version foundVersion = new Version(major, minor, bugfix, false)
+    String suffix = (match.group(4) ?: '').replace('_', '-')
+    Version foundVersion = new Version(major, minor, bugfix, suffix, false)
     if (currentVersion != foundVersion
         && (major == prevMajor || major == currentVersion.major)
         && (versions.isEmpty() || versions.last() != foundVersion)) {
@@ -106,10 +107,10 @@ if (currentVersion.bugfix == 0) {
   // unreleased version of closest branch. So for those cases, the version includes -SNAPSHOT,
   // and the bwc distribution will checkout and build that version.
   Version last = versions[-1]
-  versions[-1] = new Version(last.major, last.minor, last.bugfix, true)
+  versions[-1] = new Version(last.major, last.minor, last.bugfix, last.suffix, true)
   if (last.bugfix == 0) {
     versions[-2] = new Version(
-        versions[-2].major, versions[-2].minor, versions[-2].bugfix, true)
+        versions[-2].major, versions[-2].minor, versions[-2].bugfix, versions[-2].suffix, true)
   }
 }
 

buildSrc/src/main/groovy/org/elasticsearch/gradle/Version.groovy

@@ -20,6 +20,8 @@
 package org.elasticsearch.gradle
 
 import groovy.transform.Sortable
+import java.util.regex.Matcher
+import org.gradle.api.InvalidUserDataException
 
 /**
  * Encapsulates comparison and printing logic for an x.y.z version.
@@ -32,32 +34,37 @@ public class Version {
     final int bugfix
     final int id
     final boolean snapshot
+    /**
+     * Suffix on the version name. Unlike Version.java the build does not
+     * consider alphas and betas different versions, it just preserves the
+     * suffix that the version was declared with in Version.java.
+     */
+    final String suffix
 
-    public Version(int major, int minor, int bugfix, boolean snapshot) {
+    public Version(int major, int minor, int bugfix,
+            String suffix, boolean snapshot) {
         this.major = major
         this.minor = minor
         this.bugfix = bugfix
         this.snapshot = snapshot
+        this.suffix = suffix
         this.id = major * 100000 + minor * 1000 + bugfix * 10 +
             (snapshot ? 1 : 0)
     }
 
     public static Version fromString(String s) {
-        String[] parts = s.split('\\.')
-        String bugfix = parts[2]
-        boolean snapshot = false
-        if (bugfix.contains('-')) {
-            snapshot = bugfix.endsWith('-SNAPSHOT')
-            bugfix = bugfix.split('-')[0]
+        Matcher m = s =~ /(\d+)\.(\d+)\.(\d+)(-alpha\d+|-beta\d+|-rc\d+)?(-SNAPSHOT)?/
+        if (m.matches() == false) {
+            throw new InvalidUserDataException("Invalid version [${s}]")
         }
-        return new Version(parts[0] as int, parts[1] as int, bugfix as int,
-            snapshot)
+        return new Version(m.group(1) as int, m.group(2) as int,
+            m.group(3) as int, m.group(4) ?: '', m.group(5) != null)
     }
 
     @Override
     public String toString() {
         String snapshotStr = snapshot ? '-SNAPSHOT' : ''
-        return "${major}.${minor}.${bugfix}${snapshotStr}"
+        return "${major}.${minor}.${bugfix}${suffix}${snapshotStr}"
     }
 
     public boolean before(String compareTo) {

distribution/bwc/build.gradle

@@ -119,6 +119,14 @@ if (enabled) {
     dependsOn checkoutBwcBranch
     dir = checkoutDir
     tasks = [':distribution:deb:assemble', ':distribution:rpm:assemble', ':distribution:zip:assemble']
+    doLast {
+      List missing = [bwcDeb, bwcRpm, bwcZip].grep { file ->
+        false == file.exists() }
+      if (false == missing.empty) {
+        throw new InvalidUserDataException(
+          "Building bwc version didn't generate expected files ${missing}")
+      }
+    }
   }
 
 

test/framework/src/test/java/org/elasticsearch/test/VersionUtilsTests.java

@@ -181,11 +181,15 @@ public void testGradleVersionsMatchVersionUtils() {
         // First check the index compatible versions
         VersionsFromProperty indexCompatible = new VersionsFromProperty("tests.gradle_index_compat_versions");
         List<Version> released = VersionUtils.allReleasedVersions().stream()
-                /* We skip alphas, betas, and the like in gradle because they don't have
-                 * backwards compatibility guarantees even though they are technically
-                 * released. */
-                .filter(v -> v.isRelease() && (v.major == Version.CURRENT.major || v.major == Version.CURRENT.major - 1))
+                // Java lists some non-index compatible versions but gradle does not include them.
+                .filter(v -> v.major == Version.CURRENT.major || v.major == Version.CURRENT.major - 1)
+                /* Gradle will never include *released* alphas or betas because it will prefer
+                 * the unreleased branch head. Gradle is willing to use branch heads that are
+                 * alpha or beta so that we have *something* to test against even though we
+                 * do not offer backwards compatibility for alphas, betas, or rcs. */
+                .filter(Version::isRelease)
                 .collect(toList());
+
         List<String> releasedIndexCompatible = released.stream()
                 .map(Object::toString)
                 .collect(toList());
@@ -195,7 +199,12 @@ public void testGradleVersionsMatchVersionUtils() {
                 /* Gradle skips the current version because being backwards compatible
                  * with yourself is implied. Java lists the version because it is useful. */
                 .filter(v -> v != Version.CURRENT)
-                .map(v -> v.major + "." + v.minor + "." + v.revision)
+                /* Note that gradle does *not* skip alphas, betas, or rcs here even
+                 * though we don't have backwards compatibility for alphas, betas,
+                 * and rcs. Gradle includes them because they represent the head of
+                 * a branch that will one day be released for which we will offer
+                 * backwards compatibility. */
+                .map(Object::toString)
                 .collect(toCollection(LinkedHashSet::new)));
         assertEquals(unreleasedIndexCompatible, indexCompatible.unreleased);