2 files changed, 51 insertions, 0 deletions
diff --git a/cgithub/src/app.test.ts b/cgithub/src/app.test.ts
index 274b2d5..8720a23 100644
--- a/cgithub/src/app.test.ts
+++ b/cgithub/src/app.test.ts
@@ -358,6 +358,38 @@ describe("wiki", () => {
   });
 });
 
+describe("global search", () => {
+  it("should keep the rest of the query around the qualifier", async () => {
+    const res = await app.request(
+      "http://cgithub.example/search?q=" +
+        encodeURIComponent("is:issue repo:actions/deploy-pages label:bug") +
+        "&type=issues",
+    );
+
+    assert.strictEqual(
+      res.headers.get("location"),
+      "/actions/deploy-pages/search?q=is%3Aissue+label%3Abug&type=issues",
+    );
+  });
+
+  it("should redirect searches it cannot scope to a repository", async () => {
+    for (const url of [
+      "http://cgithub.example/search?q=dms&type=code",
+      // An owner-wide search is not a single repository.
+      "http://cgithub.example/search?q=" +
+        encodeURIComponent("org:nix-community dms") +
+        "&type=code",
+      // Without a type there is no search to hand over.
+      "http://cgithub.example/search?q=" + encodeURIComponent("repo:actions/deploy-pages dms"),
+    ]) {
+      const res = await app.request(url);
+
+      assert.strictEqual(res.status, 200, url);
+      assert.match(await res.text(), /url=https:\/\/github.com\/search\?/);
+    }
+  });
+});
+
 describe("redirects to GitHub", () => {
   // An HTTP redirect would be caught by the extension's declarativeNetRequest
   // rules and bounced straight back here.
diff --git a/cgithub/src/app.ts b/cgithub/src/app.ts
index a040aaa..7e5e9e8 100644
--- a/cgithub/src/app.ts
+++ b/cgithub/src/app.ts
@@ -95,6 +95,25 @@ export function createApp(eta: Eta) {
     return c.render("home.eta");
   });
 
+  // GitHub's global search, which we only serve when it is scoped to a single
+  // repository: strip the qualifier and let that repository's search route
+  // decide what to do with the rest.
+  app.get("/search", async (c) => {
+    const q = c.req.query("q") ?? "";
+    const type = c.req.query("type");
+
+    const repoQualifier = /(?:^|\s)repo:([^/\s]+)\/([^/\s]+)(?=\s|$)/.exec(q);
+    if (type && repoQualifier) {
+      const [qualifier, owner, repo] = repoQualifier;
+      const rest =
+        q.slice(0, repoQualifier.index) + q.slice(repoQualifier.index + qualifier.length);
+      const params = new URLSearchParams({ q: rest.trim(), type });
+      return c.redirect(`/${owner}/${repo}/search?${params}`);
+    }
+
+    return redirectToGitHub(c);
+  });
+
   app.get("/:owner", async (c) => {
     const { owner } = c.req.param();
     return c.render("owner.eta", await getGitHubOwner(owner));