chore: add GHCR downloads badge and update workflow for automated fetching

.github/badges/ghcr-downloads.json

@@ -0,0 +1,7 @@
+{
+  "schemaVersion": 1,
+  "label": "GHCR pulls",
+  "message": "0",
+  "color": "blue",
+  "cacheSeconds": 3600
+}

.github/workflows/badge-ghcr-downloads.yml

@@ -0,0 +1,54 @@
+name: "Badge: GHCR downloads"
+
+on:
+  schedule:
+    # Update periodically (GitHub schedules may be delayed)
+    - cron: '17 * * * *'
+  workflow_dispatch: {}
+
+permissions:
+  contents: write
+  packages: read
+
+concurrency:
+  group: ghcr-downloads-badge
+  cancel-in-progress: false
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout (main)
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          ref: main
+
+      - name: Set up Node
+        uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
+        with:
+          node-version: 20
+
+      - name: Update GHCR downloads badge
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GHCR_OWNER: ${{ github.repository_owner }}
+          GHCR_PACKAGE: charon
+          BADGE_OUTPUT: .github/badges/ghcr-downloads.json
+        run: node scripts/update-ghcr-downloads-badge.mjs
+
+      - name: Commit and push (if changed)
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          if git diff --quiet; then
+            echo "No changes."
+            exit 0
+          fi
+
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+          git add .github/badges/ghcr-downloads.json
+          git commit -m "chore(badges): update GHCR downloads [skip ci]"
+          git push origin HEAD:main

README.md

@@ -9,6 +9,7 @@
 <p align="center">
   <a href="https://www.repostatus.org/#active"><img src="https://www.repostatus.org/badges/latest/active.svg" alt="Project Status: Active – The project is being actively developed." /></a>
  <a href="https://hub.docker.com/r/wikid82/charon"><img src="https://img.shields.io/docker/pulls/wikid82/charon.svg" alt="Docker Pulls"></a>
+  <a href="https://github.com/users/Wikid82/packages/container/package/charon"><img src="https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/Wikid82/Charon/main/.github/badges/ghcr-downloads.json" alt="GHCR Pulls"></a>
   <a href="https://github.com/Wikid82/charon/releases"><img src="https://img.shields.io/github/v/release/Wikid82/charon?include_prereleases" alt="Release"></a>
   <br>
   <a href="https://codecov.io/gh/Wikid82/Charon" ><img src="https://codecov.io/gh/Wikid82/Charon/branch/main/graph/badge.svg?token=RXSINLQTGE" alt="Code Coverage"/></a>

scripts/update-ghcr-downloads-badge.mjs

@@ -0,0 +1,107 @@
+const DEFAULT_OUTPUT = ".github/badges/ghcr-downloads.json";
+const GH_API_BASE = "https://api.github.com";
+
+const owner = process.env.GHCR_OWNER || process.env.GITHUB_REPOSITORY_OWNER;
+const packageName = process.env.GHCR_PACKAGE || "charon";
+const outputPath = process.env.BADGE_OUTPUT || DEFAULT_OUTPUT;
+const token = process.env.GITHUB_TOKEN || "";
+
+if (!owner) {
+  throw new Error("GHCR owner is required. Set GHCR_OWNER or GITHUB_REPOSITORY_OWNER.");
+}
+
+const headers = {
+  Accept: "application/vnd.github+json",
+};
+
+if (token) {
+  headers.Authorization = `Bearer ${token}`;
+}
+
+const formatCount = (value) => {
+  if (value >= 1_000_000_000) {
+    return `${(value / 1_000_000_000).toFixed(1).replace(/\.0$/, "")}B`;
+  }
+  if (value >= 1_000_000) {
+    return `${(value / 1_000_000).toFixed(1).replace(/\.0$/, "")}M`;
+  }
+  if (value >= 1_000) {
+    return `${(value / 1_000).toFixed(1).replace(/\.0$/, "")}k`;
+  }
+  return String(value);
+};
+
+const getNextLink = (linkHeader) => {
+  if (!linkHeader) {
+    return null;
+  }
+  const match = linkHeader.match(/<([^>]+)>;\s*rel="next"/);
+  return match ? match[1] : null;
+};
+
+const fetchPage = async (url) => {
+  const response = await fetch(url, { headers });
+  if (!response.ok) {
+    const detail = await response.text();
+    const error = new Error(`Request failed: ${response.status} ${response.statusText}`);
+    error.status = response.status;
+    error.detail = detail;
+    throw error;
+  }
+  const data = await response.json();
+  const link = response.headers.get("link");
+  return { data, next: getNextLink(link) };
+};
+
+const fetchAllVersions = async (baseUrl) => {
+  let url = `${baseUrl}?per_page=100`;
+  const versions = [];
+
+  while (url) {
+    const { data, next } = await fetchPage(url);
+    versions.push(...data);
+    url = next;
+  }
+
+  return versions;
+};
+
+const fetchVersionsWithFallback = async () => {
+  const userUrl = `${GH_API_BASE}/users/${owner}/packages/container/${packageName}/versions`;
+  try {
+    return await fetchAllVersions(userUrl);
+  } catch (error) {
+    if (error.status !== 404) {
+      throw error;
+    }
+  }
+
+  const orgUrl = `${GH_API_BASE}/orgs/${owner}/packages/container/${packageName}/versions`;
+  return fetchAllVersions(orgUrl);
+};
+
+const run = async () => {
+  const versions = await fetchVersionsWithFallback();
+  const totalDownloads = versions.reduce(
+    (sum, version) => sum + (version.download_count || 0),
+    0
+  );
+
+  const badge = {
+    schemaVersion: 1,
+    label: "GHCR pulls",
+    message: formatCount(totalDownloads),
+    color: "blue",
+    cacheSeconds: 3600,
+  };
+
+  const output = `${JSON.stringify(badge, null, 2)}\n`;
+  await import("node:fs/promises").then((fs) => fs.writeFile(outputPath, output));
+
+  console.log(`GHCR downloads: ${totalDownloads} -> ${outputPath}`);
+};
+
+run().catch((error) => {
+  console.error(error);
+  process.exit(1);
+});