neoforge: skip lookup if exact request matches installed version

src/main/java/me/itzg/helpers/curseforge/CurseForgeInstaller.java

@@ -52,7 +52,7 @@
 import me.itzg.helpers.files.Manifests;
 import me.itzg.helpers.files.ReactiveFileUtils;
 import me.itzg.helpers.files.ResultsFileWriter;
-import me.itzg.helpers.forge.ForgeInstaller;
+import me.itzg.helpers.forge.ForgeLikeInstaller;
 import me.itzg.helpers.forge.ForgeInstallerResolver;
 import me.itzg.helpers.forge.ForgeUrlArgs;
 import me.itzg.helpers.forge.NeoForgeInstallerResolver;
@@ -1006,7 +1006,7 @@ private void prepareFabric(String minecraftVersion, String loaderVersion) {
     }
 
     private void prepareForge(SharedFetch sharedFetch, String minecraftVersion, String loaderVersion) {
-        new ForgeInstaller(
+        new ForgeLikeInstaller(
             new ForgeInstallerResolver(sharedFetch,
                 minecraftVersion, loaderVersion,
                 forgeUrlArgs.getPromotionsUrl(), forgeUrlArgs.getMavenRepoUrl()
@@ -1016,7 +1016,7 @@ private void prepareForge(SharedFetch sharedFetch, String minecraftVersion, Stri
     }
 
     private void prepareNeoForge(SharedFetch sharedFetch, String minecraftVersion, String loaderVersion) {
-        new ForgeInstaller(
+        new ForgeLikeInstaller(
             new NeoForgeInstallerResolver(sharedFetch,
                 minecraftVersion, loaderVersion
             )

src/main/java/me/itzg/helpers/forge/ForgeInstallerResolver.java

@@ -43,7 +43,17 @@ public ForgeInstallerResolver(SharedFetch sharedFetch,
     }
 
     @Override
-    public VersionPair resolve() {
+    public VersionPair resolve(ForgeManifest prevManifest) {
+        if (prevManifest != null) {
+            final String prevMinecraftVersion = prevManifest.getMinecraftVersion();
+            final String prevForgeVersion = prevManifest.getForgeVersion();
+            if (prevMinecraftVersion.equals(requestedMinecraftVersion)
+                && prevForgeVersion.equals(requestedForgeVersion)) {
+                log.debug("Resolved Minecraft {} Forge {} from previous manifest", prevMinecraftVersion, prevForgeVersion);
+                return new VersionPair(requestedMinecraftVersion, requestedForgeVersion);
+            }
+        }
+
         final PromotionsSlim promotionsSlim = loadPromotions();
         if (promotionsSlim.getPromos().isEmpty()) {
             throw new GenericException("No versions were available in Forge promotions");

src/main/java/me/itzg/helpers/forge/ForgeInstaller.java → src/main/java/me/itzg/helpers/forge/ForgeLikeInstaller.java

@@ -25,15 +25,15 @@
 import org.jetbrains.annotations.Nullable;
 
 @Slf4j
-public class ForgeInstaller {
+public class ForgeLikeInstaller {
 
     private static final Pattern RESULT_INFO = Pattern.compile(
         "Exec:\\s+(?<exec>.+)"
             + "|The server installed successfully, you should now be able to run the file (?<universalJar>.+)");
 
     private final InstallerResolver installerResolver;
 
-    public ForgeInstaller(InstallerResolver installerResolver) {
+    public ForgeLikeInstaller(InstallerResolver installerResolver) {
         this.installerResolver = installerResolver;
     }
 
@@ -51,7 +51,7 @@ public void install(
             throw new GenericException("Failed to load existing forge manifest", e);
         }
 
-        final VersionPair resolved = installerResolver.resolve();
+        final VersionPair resolved = installerResolver.resolve(prevManifest);
         if (resolved == null) {
             throw new InvalidParameterException("Unable to find suitable version for " +
                 installerResolver.getDescription());

src/main/java/me/itzg/helpers/forge/InstallForgeCommand.java

@@ -22,6 +22,7 @@ public class InstallForgeCommand implements Callable<Integer> {
     @Spec
     CommandLine.Model.CommandSpec spec;
 
+    @SuppressWarnings("unused")
     @Option(names = {"--help", "-h"}, usageHelp = true)
     boolean help;
 
@@ -96,7 +97,7 @@ public void setVersion(String version) {
     public Integer call() throws Exception {
         try (SharedFetch sharedFetch = Fetch.sharedFetch("install-forge", sharedFetchArgs.options())) {
 
-            final ForgeInstaller installer = new ForgeInstaller(
+            final ForgeLikeInstaller installer = new ForgeLikeInstaller(
                 versionOrInstaller.installer != null ?
                     new ProvidedInstallerResolver(versionOrInstaller.installer)
                     : new ForgeInstallerResolver(

src/main/java/me/itzg/helpers/forge/InstallNeoForgeCommand.java

@@ -22,6 +22,7 @@ public class InstallNeoForgeCommand implements Callable<Integer> {
     @Spec
     CommandLine.Model.CommandSpec spec;
 
+    @SuppressWarnings("unused")
     @Option(names = {"--help", "-h"}, usageHelp = true)
     boolean help;
 
@@ -81,7 +82,7 @@ public void setVersion(String version) {
     public Integer call() throws Exception {
         try (SharedFetch sharedFetch = Fetch.sharedFetch("install-neoforge", sharedFetchArgs.options())) {
 
-            new ForgeInstaller(
+            new ForgeLikeInstaller(
                 new NeoForgeInstallerResolver(sharedFetch, minecraftVersion, neoForgeVersion)
             )
                 .install(outputDirectory, resultsFile, forceReinstall, "NeoForge");

src/main/java/me/itzg/helpers/forge/InstallerResolver.java

@@ -4,7 +4,7 @@
 
 public interface InstallerResolver {
 
-    VersionPair resolve();
+    VersionPair resolve(ForgeManifest prevManifest);
 
     Path download(String minecraftVersion, String forgeVersion, Path outputDir);
 

src/main/java/me/itzg/helpers/forge/NeoForgeInstallerResolver.java

@@ -25,6 +25,7 @@ public class NeoForgeInstallerResolver implements InstallerResolver {
     public static final String ARTIFACT_ID_FORGE_LIKE = "forge";
     public static final String ARTIFACT_ID = "neoforge";
     public static final String FORGE_LIKE_VERSION = "1.20.1";
+    public static final String DEFAULT_MVN_URL = "https://maven.neoforged.net/releases";
 
     private final MavenRepoApi mavenRepoApi;
     private final String requestedMinecraftVersion;
@@ -36,7 +37,7 @@ public NeoForgeInstallerResolver(SharedFetch sharedFetch,
         @Nullable
         String requestedNeoForgeVersion
     ) {
-        this(sharedFetch, requestedMinecraftVersion, requestedNeoForgeVersion, "https://maven.neoforged.net/releases");
+        this(sharedFetch, requestedMinecraftVersion, requestedNeoForgeVersion, DEFAULT_MVN_URL);
     }
 
     NeoForgeInstallerResolver(SharedFetch sharedFetch,
@@ -60,7 +61,7 @@ enum NeoForgeVersionType {
     }
 
     @Override
-    public VersionPair resolve() {
+    public VersionPair resolve(ForgeManifest prevManifest) {
         if (useForgeArtifactId(requestedMinecraftVersion)) {
             return resolveForgeLike();
         }
@@ -84,6 +85,14 @@ else if (requestedNeoForgeVersion == null || requestedNeoForgeVersion.equalsIgno
             if (neoforgeVersion.length < 3) {
                 throw new InvalidParameterException("Malformed NeoForge version: " + requestedNeoForgeVersion);
             }
+
+            if (prevManifest != null) {
+                if (prevManifest.getMinecraftVersion().equals(requestedMinecraftVersion)
+                    && prevManifest.getForgeVersion().equals(requestedNeoForgeVersion)) {
+                    return new VersionPair(requestedMinecraftVersion, requestedNeoForgeVersion);
+                }
+
+            }
         }
 
         final MavenMetadata metadata = mavenRepoApi.fetchMetadata(GROUP_ID, ARTIFACT_ID)

src/main/java/me/itzg/helpers/forge/ProvidedInstallerResolver.java

@@ -26,7 +26,7 @@ public ProvidedInstallerResolver(Path forgeInstaller) {
     }
 
     @Override
-    public VersionPair resolve() {
+    public VersionPair resolve(ForgeManifest prevManifest) {
         final VersionPair versions;
         try {
             versions = extractVersion(forgeInstaller);

src/main/java/me/itzg/helpers/modrinth/ModrinthPackInstaller.java

@@ -21,7 +21,7 @@
 import me.itzg.helpers.fabric.FabricLauncherInstaller;
 import me.itzg.helpers.files.AntPathMatcher;
 import me.itzg.helpers.files.IoStreams;
-import me.itzg.helpers.forge.ForgeInstaller;
+import me.itzg.helpers.forge.ForgeLikeInstaller;
 import me.itzg.helpers.forge.ForgeInstallerResolver;
 import me.itzg.helpers.forge.ForgeUrlArgs;
 import me.itzg.helpers.forge.NeoForgeInstallerResolver;
@@ -269,7 +269,7 @@ private void prepareFabric(SharedFetch sharedFetch, String minecraftVersion, Str
     }
 
     private void prepareForge(SharedFetch sharedFetch, String minecraftVersion, String version) {
-        new ForgeInstaller(
+        new ForgeLikeInstaller(
             new ForgeInstallerResolver(sharedFetch, minecraftVersion, version,
                 forgeUrlArgs.getPromotionsUrl(), forgeUrlArgs.getMavenRepoUrl()
                 )
@@ -283,7 +283,7 @@ private void prepareForge(SharedFetch sharedFetch, String minecraftVersion, Stri
     }
 
     private void prepareNeoForge(SharedFetch sharedFetch, String minecraftVersion, String version) {
-        new ForgeInstaller(
+        new ForgeLikeInstaller(
             new NeoForgeInstallerResolver(sharedFetch, minecraftVersion, version)
         )
             .install(

src/main/java/me/itzg/helpers/mvn/MavenRepoApi.java

@@ -71,6 +71,10 @@ private Mono<MavenMetadata> retrieveMetadata(String groupId, String artifactId)
             )
             .toObject(MavenMetadata.class, xmlMapper)
             .assemble()
+            .doOnSubscribe(s ->
+                log.debug("Fetching maven metadata for {}:{} from {}",
+                    groupId, artifactId, uriBuilder.getBaseUrl())
+            )
             .checkpoint(String.format("fetching metadata for %s:%s", groupId, artifactId));
     }
 

src/test/java/me/itzg/helpers/curseforge/CurseForgeInstallerTest.java → src/test/java/me/itzg/helpers/curseforge/CurseForgeLikeInstallerTest.java

@@ -8,7 +8,7 @@
 import org.junit.jupiter.api.condition.EnabledIfSystemProperty;
 import org.junit.jupiter.api.io.TempDir;
 
-class CurseForgeInstallerTest {
+class CurseForgeLikeInstallerTest {
     @TempDir
     Path tempDir;
 

src/test/java/me/itzg/helpers/forge/NeoForgeInstallerResolverTest.java

@@ -4,12 +4,14 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.params.provider.Arguments.arguments;
 
+import com.github.tomakehurst.wiremock.client.WireMock;
 import com.github.tomakehurst.wiremock.junit5.WireMockRuntimeInfo;
 import com.github.tomakehurst.wiremock.junit5.WireMockTest;
 import java.util.stream.Stream;
 import me.itzg.helpers.http.Fetch;
 import me.itzg.helpers.http.SharedFetch;
 import me.itzg.helpers.http.SharedFetch.Options;
+import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
@@ -57,7 +59,7 @@ void resolve(String minecraftVersion, String neoforgeVersion,
                 )
             );
 
-            final VersionPair versionPair = resolver.resolve();
+            final VersionPair versionPair = resolver.resolve(null);
             if (expectedNeoforgeVersion == null) {
                 assertThat(versionPair).isNull();
             }
@@ -70,4 +72,32 @@ void resolve(String minecraftVersion, String neoforgeVersion,
         }
     }
 
+    @Test
+    void resolveSkipsLookupWhenExists(WireMockRuntimeInfo wmInfo) {
+        final String minecraftVersion = "1.21.1";
+        final String neoforgeVersion = "21.1.215";
+
+        try (SharedFetch sharedFetch = Fetch.sharedFetch("install-neoforge", Options.builder().build())) {
+            final NeoForgeInstallerResolver resolver = new NeoForgeInstallerResolver(
+                sharedFetch,
+                minecraftVersion, neoforgeVersion,
+                wmInfo.getHttpBaseUrl()
+            );
+
+            // purposely no stub of wiremock to verify no network calls are made
+
+            final ForgeManifest manifest = ForgeManifest.builder()
+                .minecraftVersion(minecraftVersion)
+                .forgeVersion(neoforgeVersion)
+                .build();
+
+            final VersionPair versionPair = resolver.resolve(manifest);
+
+            assertThat(versionPair).isNotNull();
+            assertThat(versionPair.minecraft).isEqualTo(minecraftVersion);
+            assertThat(versionPair.forge).isEqualTo(neoforgeVersion);
+
+            WireMock.verify(0, getRequestedFor(WireMock.anyUrl()));
+        }
+    }
 }

src/test/java/me/itzg/helpers/forge/ProvidedInstallerResolverTest.java

@@ -23,7 +23,7 @@ void resolvesVersionFromFile() throws URISyntaxException {
         final ProvidedInstallerResolver resolver = new ProvidedInstallerResolver(
             Paths.get(installerUrl.toURI()));
 
-        final VersionPair versions = resolver.resolve();
+        final VersionPair versions = resolver.resolve(null);
 
         assertThat(versions.minecraft).isEqualTo("1.20.2");
         assertThat(versions.forge).isEqualTo("48.1.0");