Add GitHub releases support

Scrapes releases page HTML to display version tags, publish dates, and changelog content.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

5 files changed, 150 insertions, 0 deletions

diff --git a/src/index.ts b/src/index.ts
index 4486dff..2f8efef 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -9,6 +9,7 @@ import {
   getGitHubBlob,
   getGitHubCommits,
   getGitHubIssues,
+  getGitHubReleases,
   getGitHubRepo,
   getGitHubTree,
   GitHubHTTPError,
@@ -73,6 +74,11 @@ app.get("/:owner/:repo/commits/:branch/:path{.*}?", async (c) => {
   return tryRender(c, "commits.eta", getGitHubCommits(owner, repo, branch, path));
 });
 
+app.get("/:owner/:repo/releases", async (c) => {
+  const { owner, repo } = c.req.param();
+  return tryRender(c, "releases.eta", getGitHubReleases(owner, repo));
+});
+
 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 7cafd9c..8c11317 100644
--- a/src/scraper.test.ts
+++ b/src/scraper.test.ts
@@ -4,6 +4,7 @@ import {
   getGitHubBlob,
   getGitHubCommits,
   getGitHubIssues,
+  getGitHubReleases,
   getGitHubRepo,
   getGitHubTree,
   GitHubHTTPError,
@@ -159,6 +160,19 @@ describe("GitHub scraper", () => {
 
       assert.ok(data.commitGroups.length > 0);
     });
+
+    it("should fetch releases", async () => {
+      const data = await getGitHubReleases("actions", "deploy-pages");
+
+      assert.strictEqual(data.repo.owner, "actions");
+      assert.strictEqual(data.repo.name, "deploy-pages");
+
+      assert.ok(data.releases.length > 0);
+      const firstRelease = data.releases[0];
+      assert.ok(firstRelease.tagName.length > 0);
+      assert.ok(firstRelease.title.match(/^v\d/));
+      assert.ok(firstRelease.publishedAt.length > 0);
+    });
   });
 
   describe("rich file types", () => {
diff --git a/src/scraper.ts b/src/scraper.ts
index 71d0e3e..e52ddac 100644
--- a/src/scraper.ts
+++ b/src/scraper.ts
@@ -184,6 +184,17 @@ export interface GitHubCommits extends GitHubNav {
   commitGroups: CommitGroup[];
 }
 
+interface Release {
+  tagName: string;
+  title: string;
+  publishedAt: string;
+  bodyHtml: string;
+}
+
+export interface GitHubReleases extends GitHubCommon {
+  releases: Release[];
+}
+
 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.
@@ -403,3 +414,55 @@ export async function getGitHubCommits(
     commitGroups: payload.commitGroups,
   };
 }
+
+export async function getGitHubReleases(owner: string, repo: string): Promise<GitHubReleases> {
+  const html = await fetchGitHubPage(`${owner}/${repo}/releases`);
+
+  // Releases page doesn't have embedded JSON, so we parse HTML directly
+  const releases: Release[] = [];
+
+  // Find all h2 tags with version numbers
+  const h2Regex = /<h2[^>]*id="([^"]*)"[^>]*>(v[^<]*)<\/h2>/g;
+
+  for (const h2Match of html.matchAll(h2Regex)) {
+    const id = h2Match[1];
+    const title = h2Match[2].trim();
+
+    // Find the section containing this h2
+    const sectionRegex = new RegExp(
+      `<section[^>]*>\\s*<h2[^>]*id="${id}"[^>]*>[^<]*<\\/h2>([\\s\\S]*?)<\\/section>`,
+      "s",
+    );
+    const sectionMatch = html.match(sectionRegex);
+    if (!sectionMatch) continue;
+
+    const sectionHtml = sectionMatch[1];
+
+    // Extract tag name from link
+    const tagMatch = sectionHtml.match(/<a[^>]*href="[^"]*\/tree\/([^"]+)"[^>]*>/);
+    const tagName = tagMatch?.[1] || title;
+
+    // Extract published date
+    const dateMatch = sectionHtml.match(/<relative-time[^>]*datetime="([^"]*)"[^>]*>/);
+    const publishedAt = dateMatch?.[1] || "";
+
+    // Extract body HTML (markdown content)
+    const bodyMatch = sectionHtml.match(/<div[^>]*class="[^"]*markdown-body[^"]*"[^>]*>([\s\S]*?)<\/div>/);
+    const bodyHtml = bodyMatch?.[1]?.trim() || "";
+
+    releases.push({
+      tagName,
+      title,
+      publishedAt,
+      bodyHtml,
+    });
+  }
+
+  return {
+    repo: {
+      owner,
+      name: repo,
+    },
+    releases,
+  };
+}
diff --git a/static/style.css b/static/style.css
index 8709dc2..fdf3285 100644
--- a/static/style.css
+++ b/static/style.css
@@ -232,6 +232,48 @@ pre.box {
   font-size: 0.8rem;
 }
 
+.release {
+  margin-bottom: 2rem;
+}
+
+.release-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: baseline;
+  margin-bottom: 1rem;
+  padding-bottom: .5rem;
+  border-bottom: 1px solid var(--border-color);
+
+  h3 {
+    margin: 0;
+  }
+}
+
+.release-body {
+  overflow-wrap: break-word;
+
+  a {
+    text-decoration: underline;
+  }
+
+  h1, h2 {
+    border-bottom: 1px solid var(--border-color);
+  }
+
+  img {
+    max-width: 100%;
+  }
+
+  code, pre {
+    background: var(--shade-background);
+  }
+
+  pre {
+    overflow-x: auto;
+    scrollbar-color: var(--border-color) var(--shade-background);
+  }
+}
+
 /* TODO Strip permalinks? */
 svg.octicon-link {
   display: none;
diff --git a/views/releases.eta b/views/releases.eta
new file mode 100644
index 0000000..39850d8
--- /dev/null
+++ b/views/releases.eta
@@ -0,0 +1,25 @@
+<% layout("./layout.eta") %>
+
+<h2>Releases</h2>
+
+<% for (const release of it.releases) { %>
+  <div class="box release">
+    <div class="release-header">
+      <h3>
+        <a href="/<%= it.repo.owner %>/<%= it.repo.name %>/releases/tag/<%= release.tagName %>">
+          <%= release.title %>
+        </a>
+      </h3>
+      <% if (release.publishedAt) { %>
+        <time class="timestamp" title="<%= release.publishedAt %>">
+          <%= release.publishedAt.split("T")[0] %>
+        </time>
+      <% } %>
+    </div>
+    <% if (release.bodyHtml) { %>
+      <div class="release-body">
+        <%~ release.bodyHtml %>
+      </div>
+    <% } %>
+  </div>
+<% } %>