🐛 (native): Register jgit GcConfig$PackRefsMode for reflection
Changes
2 files changed, +83 -0
MODIFY
src/main/resources/META-INF/native-image/de.workaround/git-shark/reflect-config.json
+9 -0
@@ -629,6 +629,15 @@
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]
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},
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{
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+ "name": "org.eclipse.jgit.lib.GcConfig$PackRefsMode",
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+ "methods": [
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+ {
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+ "name": "values",
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+ "parameterTypes": []
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+ }
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+ ]
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+ },
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+ {
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"name": "org.eclipse.jgit.lib.GpgConfig$GpgFormat",
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"methods": [
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{
ADD
src/test/java/de/workaround/nativeimg/JgitReflectConfigTest.java
+74 -0
@@ -0,0 +1,74 @@
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+package de.workaround.nativeimg;
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+
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+import java.io.InputStream;
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+import java.util.ArrayList;
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+import java.util.List;
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+
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+import org.eclipse.jgit.lib.GcConfig;
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+import org.junit.jupiter.api.Test;
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+
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+import com.fasterxml.jackson.databind.JsonNode;
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+import com.fasterxml.jackson.databind.ObjectMapper;
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+
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+import static org.junit.jupiter.api.Assertions.assertTrue;
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+import static org.junit.jupiter.api.Assertions.fail;
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+
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+/**
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+ * jgit reads git config values such as {@code gc.packRefs} by reflectively calling
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+ * {@code values()} on the corresponding enum. In a native image every such enum must be
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+ * listed in reflect-config.json, otherwise startup fails with NoSuchMethodException.
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+ * This guards the enums nested in {@link GcConfig} against jgit upgrades that add new ones.
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+ */
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+class JgitReflectConfigTest
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+{
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+ private static final String CONFIG = "META-INF/native-image/de.workaround/git-shark/reflect-config.json";
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+
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+ @Test
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+ void gcConfigEnumsAreRegisteredForReflection() throws Exception
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+ {
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+ JsonNode entries;
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+ try (InputStream in = Thread.currentThread().getContextClassLoader().getResourceAsStream(CONFIG))
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+ {
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+ assertTrue(in != null, "reflect-config.json not found on classpath: " + CONFIG);
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+ entries = new ObjectMapper().readTree(in);
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+ }
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+
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+ List<String> missing = new ArrayList<>();
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+ for (Class<?> nested : GcConfig.class.getDeclaredClasses())
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+ {
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+ if (!nested.isEnum())
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+ {
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+ continue;
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+ }
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+ if (!hasValuesEntry(entries, nested.getName()))
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+ {
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+ missing.add(nested.getName());
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+ }
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+ }
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+
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+ if (!missing.isEmpty())
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+ {
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+ fail("These jgit enums must be registered in reflect-config.json with a values() method "
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+ + "or the native image fails to start: " + missing);
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+ }
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+ }
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+
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+ private static boolean hasValuesEntry(JsonNode entries, String className)
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+ {
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+ for (JsonNode entry : entries)
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+ {
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+ if (!className.equals(entry.path("name").asText()))
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+ {
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+ continue;
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+ }
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+ for (JsonNode method : entry.path("methods"))
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+ {
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+ if ("values".equals(method.path("name").asText()))
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+ {
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+ return true;
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+ }
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+ }
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+ }
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+ return false;
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+ }
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+}