Fix: Speed up build configuration time

apollo-gradle-plugin/src/main/groovy/com/apollographql/apollo/gradle/ApolloPlugin.groovy

@@ -26,7 +26,7 @@ class ApolloPlugin implements Plugin<Project> {
 
   private Project project
   private final FileResolver fileResolver
-  private boolean useGlobalApolloCodegen
+  private boolean useGlobalApolloCodegen = System.properties['apollographql.useGlobalApolloCodegen']?.toBoolean()
 
   @Inject
   ApolloPlugin(FileResolver fileResolver) {
@@ -48,9 +48,7 @@ class ApolloPlugin implements Plugin<Project> {
   }
 
   private void applyApolloPlugin() {
-    if (isUseGlobalApolloCodegenEnabled() && verifySystemApolloCodegenVersion()) {
-      useGlobalApolloCodegen = true
-    } else {
+    if (!useGlobalApolloCodegen) {
       setupNode()
     }
 
@@ -214,33 +212,4 @@ class ApolloPlugin implements Plugin<Project> {
     return project.android.hasProperty(
         'libraryVariants') ? project.android.libraryVariants : project.android.applicationVariants
   }
-
-  private static boolean isUseGlobalApolloCodegenEnabled() {
-    return (System.properties['apollographql.useGlobalApolloCodegen'] != null) &&
-        System.properties['apollographql.useGlobalApolloCodegen'].toBoolean()
-  }
-
-  private static boolean verifySystemApolloCodegenVersion() {
-    println("Verifying system 'apollo-codegen' version (executing command 'apollo-codegen --version') ...")
-    try {
-      StringBuilder output = new StringBuilder()
-      Process checkGlobalApolloCodegen = "apollo-codegen --version".execute()
-      checkGlobalApolloCodegen.consumeProcessOutput(output, null)
-      checkGlobalApolloCodegen.waitForOrKill(5000)
-
-      if (output.toString().trim() == GraphQLCompiler.APOLLOCODEGEN_VERSION) {
-        println("Found required 'apollo-codegen@" + GraphQLCompiler.APOLLOCODEGEN_VERSION + "' version.")
-        println("Skip apollo-codegen installation.")
-        return true
-      } else {
-        println("Required 'apollo-codegen@" + GraphQLCompiler.APOLLOCODEGEN_VERSION + "' version not found.")
-        println("Installing apollo-codegen ... ")
-        return false
-      }
-    } catch (Exception e) {
-      println("Failed to verify system 'apollo-codegen' version: " + e)
-      println("Installing apollo-codegen ... ")
-      return false
-    }
-  }
 }

apollo-gradle-plugin/src/main/groovy/com/apollographql/apollo/gradle/ApolloSystemCodegenGenerationTask.groovy

@@ -1,13 +1,16 @@
 package com.apollographql.apollo.gradle
 
-
+import org.gradle.api.GradleException
 import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.logging.Logger
 import org.gradle.api.provider.Property
 import org.gradle.api.tasks.AbstractExecTask
 import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.Optional
 import org.gradle.api.tasks.OutputDirectory
 
+import static com.apollographql.apollo.compiler.GraphQLCompiler.APOLLOCODEGEN_VERSION
+
 class ApolloSystemCodegenGenerationTask extends AbstractExecTask<ApolloSystemCodegenGenerationTask> {
   @Input final Property<String> variant = project.objects.property(String.class)
   @Input final Property<List> sourceSetNames = project.objects.property(List.class)
@@ -21,6 +24,7 @@ class ApolloSystemCodegenGenerationTask extends AbstractExecTask<ApolloSystemCod
 
   @Override
   void exec() {
+    verifySystemApolloCodegenVersion(logger)
     setCommandLine("apollo-codegen")
 
     List<CodegenGenerationTaskCommandArgsBuilder.CommandArgs> args = new CodegenGenerationTaskCommandArgsBuilder(
@@ -32,4 +36,24 @@ class ApolloSystemCodegenGenerationTask extends AbstractExecTask<ApolloSystemCod
       super.exec()
     }
   }
+
+  private static verifySystemApolloCodegenVersion(Logger logger) {
+    logger.info("Verifying system 'apollo-codegen' version (executing command 'apollo-codegen --version') ...")
+    try {
+      StringBuilder output = new StringBuilder()
+      Process checkGlobalApolloCodegen = "apollo-codegen --version".execute()
+      checkGlobalApolloCodegen.consumeProcessOutput(output, null)
+      checkGlobalApolloCodegen.waitForOrKill(5000)
+
+      def version = output.toString().trim()
+      if (version == APOLLOCODEGEN_VERSION) {
+        logger.info("Found required 'apollo-codegen@$APOLLOCODEGEN_VERSION' version.")
+        logger.info("Skip apollo-codegen installation.")
+      } else {
+        throw new GradleException("Required 'apollo-codegen@$APOLLOCODEGEN_VERSION' version but found: $version. Consider disabling `apollographql.useGlobalApolloCodegen` in gradle.properties file.")
+      }
+    } catch (Exception exception) {
+      throw new GradleException("Failed to verify system 'apollo-codegen' version. Consider disabling `apollographql.useGlobalApolloCodegen` in gradle.properties file.", exception)
+    }
+  }
 }