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fix(java): explain recovery for unimported launch modules (#585)

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Java launch preparation forwarded jdtls project-lookup failures unchanged, so a Maven module missing from the parent build or a wrongly inferred module showed a raw jdtls error in every Run and Debug entry point. Launch preparation now names the selected module and explains how to recover: wait for import, check the run configuration and the parent build, or open the folder as a project.

Covers the "does not belong to any Java project", "references non-existing project" and "not a Java project" responses. Cancellation, missing server, crash, timeout and build errors keep their existing handling. Import membership and module inference are unchanged.

Refs #197
This commit is contained in:
l0ng-ai
2026-10-31 23:56:19 +08:00
committed by GitHub
parent 369c63979d
commit 9dc736de09
4 changed files with 92 additions and 6 deletions
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src/platform/javaLaunch.ts
+16 -2
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@@ -4,7 +4,7 @@
* `${classpath}` (or `${testClasspath}`) and the `java` launcher are resolved
* through jdtls when the configuration starts.
*/
import { call, commands, type JavaLaunchInfo, type RunConfig, type RequestId } from "@/platform/ipc";
import { call, commands, IpcError, type JavaLaunchInfo, type RunConfig, type RequestId } from "@/platform/ipc";
import { tx } from "@/platform/i18n";
export const CLASSPATH = "${classpath}";
@@ -167,7 +167,21 @@ export async function prepareJavaLaunch(config: RunConfig, preparation: JavaPrep
const module = await resolveJavaModule(config);
signal.throwIfAborted();
const moduleMs = performance.now() - started;
const info = await call(commands.javaResolveLaunch(module, parsed.classpath === "test", true, preparation.request));
const info = await call(
commands.javaResolveLaunch(module, parsed.classpath === "test", true, preparation.request),
).catch((error: unknown) => {
if (
error instanceof IpcError &&
error.kind !== "cancelled" &&
/^jdtls:.*(?:does not belong to any java project|references non-existing project|not a java project)/i.test(
error.message,
)
)
throw new Error(
tx`Java module '${module || "."}' is not imported. Wait for Java project import to finish. If it still fails, check the run configuration's module and whether it is included in the parent Maven or Gradle build, or open its folder as a project.`,
);
throw error;
});
signal.throwIfAborted();
console.info("Java launch preparation", { module, moduleMs, resolveMs: performance.now() - started - moduleMs });
if (info.build === "withErrors")