feat(build): add Maven thread count setting (#1800)

Signed-off-by: Inf1mum <[email protected]>

src/features/settings/__tests__/languages.test.ts

@@ -26,7 +26,7 @@ describe("languages settings", () => {
         jdtlsVmArgs: " -Xmx2g ",
         jdk: 21,
         jdtlsJdk: " /opt/jdk-25 ",
-        maven: { home: " /opt/maven ", daemon: "yes", mvndHome: " /opt/mvnd " },
+        maven: { home: " /opt/maven ", daemon: "yes", mvndHome: " /opt/mvnd ", threads: " 2C " },
       },
     });
     expect(v.python).toEqual({ interpreter: "/usr/bin/python3", activateVirtualenv: true });
@@ -45,8 +45,10 @@ describe("languages settings", () => {
       linkedProjects: [],
       daemon: false,
       mvndHome: "/opt/mvnd",
+      threads: "2C",
     });
     expect(validateSettings({}).languages).toEqual(DEFAULT_LANGUAGES);
+    expect(validateLanguages({ java: { maven: { threads: 4 } } }).java.maven.threads).toBe("");
   });
 
   it("keeps the Ruby interpreter through settings normalization and defaults to Auto", () => {

src/features/settings/languages/LanguagePages.tsx

@@ -477,6 +477,8 @@ export function GradlePage() {
 
 export function MavenPage() {
   const [daemon, setDaemon] = useSetting<boolean>("languages.java.maven.daemon");
+  const [threads, setThreads] = useSetting<string>("languages.java.maven.threads");
+  const id = useId();
   return (
     <div className={styles.page}>
       <Section>
@@ -506,6 +508,23 @@ export function MavenPage() {
           title="Select Local Repository"
           hint="Passed as -Dmaven.repo.local."
         />
+        <Row
+          label="Thread count"
+          htmlFor={id}
+          hint="Passed as -T to Maven builds and run configurations: a thread count (4) or a core multiplier (2C, 2.5C) for parallel builds of multi-module projects. Empty runs Maven serially."
+        >
+          <span className={styles.pathRow}>
+            <Input
+              id={id}
+              mono
+              className={styles.pathInput}
+              value={threads}
+              placeholder="4, 2C"
+              onChange={(e) => setThreads(e.target.value.trim())}
+              aria-label="Thread count"
+            />
+          </span>
+        </Row>
         <Toggle
           label="Use Maven Daemon (mvnd)"
           checked={daemon}

src/features/settings/pages/execution.tsx

@@ -144,7 +144,20 @@ export const EXECUTION_PAGES: PageSpec[] = [
     group: BUILD_GROUP,
     // IntelliJ IDEA: Build Tools › Maven, before Console / Debugger.
     order: 359,
-    keywords: ["maven home", "mvn", "mvnw", "wrapper", "settings.xml", "user settings", "local repository", "m2"],
+    keywords: [
+      "maven home",
+      "mvn",
+      "mvnw",
+      "wrapper",
+      "settings.xml",
+      "user settings",
+      "local repository",
+      "m2",
+      "thread count",
+      "threads",
+      "-T",
+      "parallel",
+    ],
     component: MavenPage,
   },
   {