Commits list

3 files changed, 90 insertions, 0 deletions

diff --git a/src/index.ts b/src/index.ts
index d4229fd..4486dff 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -7,6 +7,7 @@ import path from "node:path";
 import url from "node:url";
 import {
   getGitHubBlob,
+  getGitHubCommits,
   getGitHubIssues,
   getGitHubRepo,
   getGitHubTree,
@@ -67,6 +68,11 @@ app.get("/:owner/:repo/issues", async (c) => {
   return tryRender(c, "issues.eta", getGitHubIssues(owner, repo));
 });
 
+app.get("/:owner/:repo/commits/:branch/:path{.*}?", async (c) => {
+  const { owner, repo, branch, path = "" } = c.req.param();
+  return tryRender(c, "commits.eta", getGitHubCommits(owner, repo, branch, path));
+});
+
 app.all("*", async (c) => {
   const path = c.req.path;
   c.header("Referrer-Policy", "no-referrer");
diff --git a/src/scraper.test.ts b/src/scraper.test.ts
index ae38c44..7cafd9c 100644
--- a/src/scraper.test.ts
+++ b/src/scraper.test.ts
@@ -2,6 +2,7 @@ import assert from "node:assert";
 import { describe, it } from "node:test";
 import {
   getGitHubBlob,
+  getGitHubCommits,
   getGitHubIssues,
   getGitHubRepo,
   getGitHubTree,
@@ -128,6 +129,36 @@ describe("GitHub scraper", () => {
       assert.strictEqual(issue402.state, "OPEN");
       assert.strictEqual(issue402.createdAt, "2025-07-03T19:07:08Z");
     });
+
+    it("should fetch commits", async () => {
+      const data = await getGitHubCommits("actions", "deploy-pages", "main", "");
+
+      assert.strictEqual(data.repo.owner, "actions");
+      assert.strictEqual(data.repo.name, "deploy-pages");
+      assert.strictEqual(data.branch, "main");
+      assert.strictEqual(data.path, "");
+
+      assert.ok(data.commitGroups.length > 0);
+      const firstGroup = data.commitGroups[0];
+      assert.ok(firstGroup.title.length > 0);
+      assert.ok(firstGroup.commits.length > 0);
+
+      const firstCommit = firstGroup.commits[0];
+      assert.ok(firstCommit.oid.length === 40);
+      assert.ok(firstCommit.shortMessage.length > 0);
+      assert.ok(firstCommit.authors.length > 0);
+    });
+
+    it("should fetch commits with path", async () => {
+      const data = await getGitHubCommits("actions", "deploy-pages", "main", "src");
+
+      assert.strictEqual(data.repo.owner, "actions");
+      assert.strictEqual(data.repo.name, "deploy-pages");
+      assert.strictEqual(data.branch, "main");
+      assert.strictEqual(data.path, "src");
+
+      assert.ok(data.commitGroups.length > 0);
+    });
   });
 
   describe("rich file types", () => {
diff --git a/src/scraper.ts b/src/scraper.ts
index e58402a..71d0e3e 100644
--- a/src/scraper.ts
+++ b/src/scraper.ts
@@ -54,6 +54,26 @@ interface IssueIndexPageQuery {
 
 type StylingDirective = [number, number, string];
 
+interface Commit {
+  oid: string;
+  url: string;
+  authoredDate: string;
+  committedDate: string;
+  shortMessage: string;
+  bodyMessageHtml: string;
+  authors: {
+    login: string;
+    displayName: string;
+    avatarUrl: string;
+    path: string;
+  }[];
+}
+
+export interface CommitGroup {
+  title: string;
+  commits: Commit[];
+}
+
 interface RawPayload {
   repo: {
     ownerLogin: string;
@@ -82,6 +102,7 @@ interface RawPayload {
   overview?: {
     overviewFiles?: OverviewFile[];
   };
+  commitGroups?: CommitGroup[];
   // Actually there may be other query types.
   preloadedQueries?: IssueIndexPageQuery[];
 }
@@ -159,6 +180,10 @@ export interface GitHubIssues extends GitHubCommon {
   issues: Issue[];
 }
 
+export interface GitHubCommits extends GitHubNav {
+  commitGroups: CommitGroup[];
+}
+
 async function fetchGitHubPage(path: string): Promise<string> {
   // GitHub throttles/blocks requests without realistic browser headers.
   // These headers make the request appear as a standard browser visit.
@@ -350,3 +375,31 @@ export async function getGitHubIssues(owner: string, repo: string): Promise<GitH
     issues,
   };
 }
+
+export async function getGitHubCommits(
+  owner: string,
+  repo: string,
+  branch: string,
+  path: string,
+): Promise<GitHubCommits> {
+  const urlPath = path
+    ? `${owner}/${repo}/commits/${branch}/${path}`
+    : `${owner}/${repo}/commits/${branch}`;
+  const html = await fetchGitHubPage(urlPath);
+
+  const payload = parsePayload(html, "react-app.embeddedData", ["payload"]);
+
+  if (payload?.commitGroups === undefined) {
+    throw new Error("Could not find commit history in embedded JSON");
+  }
+
+  return {
+    repo: {
+      owner,
+      name: repo,
+    },
+    branch,
+    path,
+    commitGroups: payload.commitGroups,
+  };
+}