Make resolve conflict in transport version its own task (#134842)

This commit moves the action for resolving merge conflicts in transport version files a separate task instead of a command line flag to generate.

build-tools-internal/src/integTest/groovy/org/elasticsearch/gradle/internal/transport/ResolveTransportVersionConflictFuncTest.groovy

@@ -0,0 +1,90 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+package org.elasticsearch.gradle.internal.transport
+
+import org.gradle.testkit.runner.BuildResult
+import org.gradle.testkit.runner.GradleRunner
+import org.gradle.testkit.runner.TaskOutcome
+
+class ResolveTransportVersionConflictFuncTest extends AbstractTransportVersionFuncTest {
+
+    GradleRunner runResolveAndValidateTask() {
+        List<String> args = List.of(":myserver:validateTransportVersionResources", ":myserver:resolveTransportVersionConflict")
+        return gradleRunner(args.toArray())
+    }
+
+    void assertResolveAndValidateSuccess(BuildResult result) {
+        assert result.task(":myserver:resolveTransportVersionConflict").outcome == TaskOutcome.SUCCESS
+        assert result.task(":myserver:validateTransportVersionResources").outcome == TaskOutcome.SUCCESS
+    }
+
+    def "update flag works with current"() {
+        given:
+        referableAndReferencedTransportVersion("new_tv", "8123000")
+        file("myserver/src/main/resources/transport/latest/9.2.csv").text =
+            """
+            <<<<<<< HEAD
+            existing_92,8123000
+            =======
+            new_tv,8123000
+            >>>>>> name
+            """.strip()
+
+        when:
+        def result = runResolveAndValidateTask().build()
+
+        then:
+        assertResolveAndValidateSuccess(result)
+        assertReferableDefinition("existing_92", "8123000,8012001")
+        assertReferableDefinition("new_tv", "8124000")
+        assertUpperBound("9.2", "new_tv,8124000")
+    }
+
+    def "update flag works with multiple branches"() {
+        given:
+        referableAndReferencedTransportVersion("new_tv", "8123000,8012001,7123001")
+        file("myserver/src/main/resources/transport/latest/9.2.csv").text =
+            """
+            <<<<<<< HEAD
+            existing_92,8123000
+            =======
+            new_tv,8123000
+            >>>>>> name
+            """.strip()
+        file("myserver/src/main/resources/transport/latest/9.1.csv").text =
+            """
+            <<<<<<< HEAD
+            existing_92,8012001
+            =======
+            new_tv,8012001
+            >>>>>> name
+            """.strip()
+        file("myserver/src/main/resources/transport/latest/8.19.csv").text =
+            """
+            <<<<<<< HEAD
+            initial_8.19.7,7123001
+            =======
+            new_tv,7123001
+            >>>>>> name
+            """.strip()
+
+        when:
+        def result = runResolveAndValidateTask().build()
+
+        then:
+        assertResolveAndValidateSuccess(result)
+        assertReferableDefinition("existing_92", "8123000,8012001")
+        assertUnreferableDefinition("initial_8.19.7", "7123001")
+        assertReferableDefinition("new_tv", "8124000,8012002,7123002")
+        assertUpperBound("9.2", "new_tv,8124000")
+        assertUpperBound("9.1", "new_tv,8012002")
+        assertUpperBound("8.19", "new_tv,7123002")
+    }
+}

build-tools-internal/src/integTest/groovy/org/elasticsearch/gradle/internal/transport/TransportVersionGenerationFuncTest.groovy

@@ -19,14 +19,14 @@ class TransportVersionGenerationFuncTest extends AbstractTransportVersionFuncTes
         List<String> args = new ArrayList<>()
         args.add(":myserver:validateTransportVersionResources")
         args.add(":myserver:generateTransportVersion")
-        args.addAll(additionalArgs);
+        args.addAll(additionalArgs)
         return gradleRunner(args.toArray())
     }
 
     def runGenerateTask(String... additionalArgs) {
         List<String> args = new ArrayList<>()
         args.add(":myserver:generateTransportVersion")
-        args.addAll(additionalArgs);
+        args.addAll(additionalArgs)
         return gradleRunner(args.toArray())
     }
 
@@ -277,77 +277,6 @@ class TransportVersionGenerationFuncTest extends AbstractTransportVersionFuncTes
         assertUpperBound("9.2", "second_tv,8124000")
     }
 
-    def "update flag works with current"() {
-        given:
-        referableAndReferencedTransportVersion("new_tv", "8123000")
-        file("myserver/src/main/resources/transport/latest/9.2.csv").text =
-            """
-            <<<<<<< HEAD
-            existing_92,8123000
-            =======
-            new_tv,8123000
-            >>>>>> name
-            """.strip()
-
-        when:
-        def result = runGenerateAndValidateTask("--resolve-conflict").build()
-
-        then:
-        assertGenerateAndValidateSuccess(result)
-        assertReferableDefinition("existing_92", "8123000,8012001")
-        assertReferableDefinition("new_tv", "8124000")
-        assertUpperBound("9.2", "new_tv,8124000")
-    }
-
-    def "update flag works with multiple branches"() {
-        given:
-        referableAndReferencedTransportVersion("new_tv", "8123000,8012001,7123001")
-        file("myserver/src/main/resources/transport/latest/9.2.csv").text =
-            """
-            <<<<<<< HEAD
-            existing_92,8123000
-            =======
-            new_tv,8123000
-            >>>>>> name
-            """.strip()
-        file("myserver/src/main/resources/transport/latest/9.1.csv").text =
-            """
-            <<<<<<< HEAD
-            existing_92,8012001
-            =======
-            new_tv,8012001
-            >>>>>> name
-            """.strip()
-        file("myserver/src/main/resources/transport/latest/8.19.csv").text =
-            """
-            <<<<<<< HEAD
-            initial_8.19.7,7123001
-            =======
-            new_tv,7123001
-            >>>>>> name
-            """.strip()
-
-        when:
-        def result = runGenerateAndValidateTask("--resolve-conflict").build()
-
-        then:
-        assertGenerateAndValidateSuccess(result)
-        assertReferableDefinition("existing_92", "8123000,8012001")
-        assertUnreferableDefinition("initial_8.19.7", "7123001")
-        assertReferableDefinition("new_tv", "8124000,8012002,7123002")
-        assertUpperBound("9.2", "new_tv,8124000")
-        assertUpperBound("9.1", "new_tv,8012002")
-        assertUpperBound("8.19", "new_tv,7123002")
-    }
-
-    def "update flag cannot be used with backport branches"() {
-        when:
-        def result = runGenerateTask("--resolve-conflict", "--backport-branches=9.1").buildAndFail()
-
-        then:
-        assertGenerateFailure(result, "Cannot use --resolve-conflict with --backport-branches")
-    }
-
     def "branches param order does not matter"() {
         given:
         referencedTransportVersion("test_tv")

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/transport/GenerateTransportVersionDefinitionTask.java

@@ -74,11 +74,7 @@ public abstract class GenerateTransportVersionDefinitionTask extends DefaultTask
 
     @Input
     @Optional
-    @Option(
-        option = "resolve-conflict",
-        description = "Regenerate the transport version currently being added to upstream to resolve a merge conflict"
-    )
-    public abstract Property<Boolean> getResolveConflict();
+    abstract Property<Boolean> getResolveConflict();
 
     /**
      * The name of the upper bounds file which will be used at runtime on the current branch. Normally

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/transport/TransportVersionResourcesPlugin.java

@@ -23,6 +23,7 @@ import org.gradle.language.base.plugins.LifecycleBasePlugin;
 
 import java.util.Map;
 import java.util.Properties;
+import java.util.function.Consumer;
 
 public class TransportVersionResourcesPlugin implements Plugin<Project> {
 
@@ -82,16 +83,28 @@ public class TransportVersionResourcesPlugin implements Plugin<Project> {
             t.into(resourceRoot + "/definitions", c -> c.from(generateManifestTask));
         });
 
+        Consumer<GenerateTransportVersionDefinitionTask> generationConfiguration = t -> {
+            t.setGroup(taskGroup);
+            t.getReferencesFiles().setFrom(tvReferencesConfig);
+            t.getIncrement().convention(1000);
+            t.getCurrentUpperBoundName().convention(currentVersion.getMajor() + "." + currentVersion.getMinor());
+        };
+
         var generateDefinitionsTask = project.getTasks()
             .register("generateTransportVersion", GenerateTransportVersionDefinitionTask.class, t -> {
-                t.setGroup(taskGroup);
+                generationConfiguration.accept(t);
                 t.setDescription("(Re)generates a transport version definition file");
-                t.getReferencesFiles().setFrom(tvReferencesConfig);
-                t.getIncrement().convention(1000);
-                t.getCurrentUpperBoundName().convention(currentVersion.getMajor() + "." + currentVersion.getMinor());
             });
         validateTask.configure(t -> t.mustRunAfter(generateDefinitionsTask));
 
+        var resolveConflictTask = project.getTasks()
+            .register("resolveTransportVersionConflict", GenerateTransportVersionDefinitionTask.class, t -> {
+                generationConfiguration.accept(t);
+                t.setDescription("Resolve merge conflicts in transport version internal state files");
+                t.getResolveConflict().set(true);
+            });
+        validateTask.configure(t -> t.mustRunAfter(resolveConflictTask));
+
         var generateInitialTask = project.getTasks()
             .register("generateInitialTransportVersion", GenerateInitialTransportVersionTask.class, t -> {
                 t.setGroup(taskGroup);

docs/internal/Versioning.md

@@ -122,9 +122,9 @@ the latter will have a merge conflict with `main`.
 
 In the event of a conflict, merge `main` into your branch. You will have
 conflict(s) with transport version internal state files. Run the following
-generate task to resolve the conflict(s):
+task to resolve the conflict(s):
 
-    ./gradlew generateTransportVersion --resolve-conflict
+    ./gradlew resolveTransportVersionConflict
 
 This command will regenerate your transport version and stage the updated
 state files in git. You can then proceed with your merge as usual.