Add SemVer.compare static method for version comparison

src/lib/utils/templates/semver.test.ts

@@ -48,6 +48,49 @@ describe("SemVer", () => {
     });
   });
 
+  describe("compare", () => {
+    test("相等", () => {
+      expect(SemVer.compare("1.0.0", "1.0.0")).toBe(0);
+      expect(SemVer.compare("1.0", "1.0")).toBe(0);
+    });
+
+    test("major 不同", () => {
+      expect(SemVer.compare("1.0.0", "2.0.0")).toBeLessThan(0);
+      expect(SemVer.compare("2.0.0", "1.0.0")).toBeGreaterThan(0);
+    });
+
+    test("minor 不同", () => {
+      expect(SemVer.compare("1.0.0", "1.1.0")).toBeLessThan(0);
+      expect(SemVer.compare("1.1.0", "1.0.0")).toBeGreaterThan(0);
+    });
+
+    test("patch 不同", () => {
+      expect(SemVer.compare("1.0.1", "1.0.2")).toBeLessThan(0);
+      expect(SemVer.compare("1.0.2", "1.0.1")).toBeGreaterThan(0);
+    });
+
+    test("缺 patch 视为 0", () => {
+      expect(SemVer.compare("1.0", "1.0.0")).toBe(0);
+      expect(SemVer.compare("1.0.1", "1.0")).toBeGreaterThan(0);
+    });
+
+    test("pre-release < 正式版", () => {
+      expect(SemVer.compare("1.0.0-alpha", "1.0.0")).toBeLessThan(0);
+      expect(SemVer.compare("1.0.0", "1.0.0-beta")).toBeGreaterThan(0);
+    });
+
+    test("可作排序用", () => {
+      const input = ["1.10.0", "1.2.0", "1.2.1", "1.2.0-beta"];
+      const sorted = input.toSorted(SemVer.compare);
+      expect(sorted).toEqual(["1.2.0-beta", "1.2.0", "1.2.1", "1.10.0"]);
+    });
+
+    test(">=26 版本", () => {
+      expect(SemVer.compare("26.1", "26.2")).toBeLessThan(0);
+      expect(SemVer.compare("27.0", "26.99")).toBeGreaterThan(0);
+    });
+  });
+
   describe("format", () => {
     test("两段", () => {
       expect(new SemVer(1, 2).format()).toBe("1.2");

src/lib/utils/templates/semver.ts

@@ -46,4 +46,24 @@ export class SemVer implements TemplateValue {
       match[4] ?? null,
     );
   };
+
+  /**
+   * 比较两个版本号字符串，返回负数/0/正数。
+   * 可直接作为 Array.toSorted 的比较函数。
+   */
+  static compare(a: string, b: string): number {
+    const va = SemVer.parse(a);
+    const vb = SemVer.parse(b);
+    if (va.major !== vb.major) return va.major - vb.major;
+    if (va.minor !== vb.minor) return va.minor - vb.minor;
+    const pa = va.patch ?? 0;
+    const pb = vb.patch ?? 0;
+    if (pa !== pb) return pa - pb;
+    if (va.preRelease === null && vb.preRelease !== null) return 1;
+    if (va.preRelease !== null && vb.preRelease === null) return -1;
+    if (va.preRelease !== null && vb.preRelease !== null) {
+      return va.preRelease.localeCompare(vb.preRelease);
+    }
+    return 0;
+  }
 }