Automagic build

.github/workflows/dirty-work.yml

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+name: It's too hard to keep everything updated by hand
+
+on:
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  list-missing-versions:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Deno
+        uses: denoland/setup-deno@v1
+        with:
+          deno-version: v1.x
+      - name: List versions
+        run: deno run -A ./ci/list_versions_to_build.ts

ci/list_versions_to_build.ts

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+import "https://deno.land/std@0.201.0/dotenv/load.ts";
+import { Octokit } from "https://esm.sh/octokit@3.1.0?dts";
+
+interface Version {
+  readonly major: number;
+  readonly minor: number;
+  readonly patch: number;
+}
+
+function versionCmp(a: Version, b: Version) {
+  // lexicographic comparison
+  const aa = a.major * 1_000_000 + a.minor * 1_000 + a.patch;
+  const bb = b.major * 1_000_000 + b.minor * 1_000 + b.patch;
+  return (aa < bb) ? -1 : ((aa > bb) ? 1 : 0);
+}
+
+const dockerBaseUrl = "https://hub.docker.com";
+
+async function dockerLogin(
+  options: { username: string; password: string },
+): Promise<string> {
+  interface Response {
+    token: string;
+  }
+
+  const url = `${dockerBaseUrl}/v2/users/login`;
+  const response = await fetch(url, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(options),
+  });
+
+  if (response.status !== 200) {
+    throw new Error("failed to login");
+  }
+
+  return response.json().then((data: Response) => data.token);
+}
+
+async function dockerListTags(
+  token: string,
+  { namespace, repository }: {
+    namespace: string;
+    repository: string;
+  },
+) {
+  interface Response {
+    count: number;
+    results: {
+      name: string;
+    }[];
+  }
+
+  let allNames: string[] = [];
+  const page = 0;
+  for (;;) {
+    const pageSize = 100;
+    const url = (page && page >= 0)
+      ? `${dockerBaseUrl}/v2/namespaces/${namespace}/repositories/${repository}/tags?page=${page}&page_size=${pageSize}`
+      : `${dockerBaseUrl}/v2/namespaces/${namespace}/repositories/${repository}/tags?page_size=${pageSize}`;
+    const response = await fetch(url, {
+      headers: { "Authorization": `Bearer ${token}` },
+    });
+
+    if (response.status !== 200) {
+      throw new Error("failed to download list of tags");
+    }
+
+    const body: Response = await response.json();
+    allNames = allNames.concat(body.results.map((r) => r.name));
+
+    if (allNames.length < body.count) {
+      break;
+    }
+  }
+
+  // filter only valid triplet
+  const validVersionRegExp = /^(\d+)\.(\d+)\.(\d+)$/;
+  return allNames
+    .map((name) => {
+      const matches = name.match(validVersionRegExp);
+      if (matches) {
+        const version = {
+          major: Number.parseInt(matches[1]),
+          minor: Number.parseInt(matches[2]),
+          patch: Number.parseInt(matches[3]),
+        };
+        return version;
+      }
+    })
+    .filter((x): x is Version => x !== undefined)
+    .sort(versionCmp);
+}
+
+async function githubListContainerTags(token: string, { packageName }: {
+  packageName: string;
+}) {
+  const octokit = new Octokit({ auth: token });
+
+  const api = octokit.rest.packages
+    .getAllPackageVersionsForPackageOwnedByAuthenticatedUser;
+  const packageVersion = octokit.paginate.iterator(api, {
+    package_type: "container",
+    package_name: packageName,
+    per_page: 100,
+  });
+
+  let allTags: string[] = [];
+  for await (const { data: packages } of packageVersion) {
+    for (const { metadata: packageMetadata } of packages) {
+      const tags = packageMetadata.container.tags as string[];
+      if (tags.length > 0) {
+        allTags = allTags.concat(tags);
+      }
+    }
+  }
+
+  // filter only valid triplet
+  const validTagRegExp = /^(\d+)\.(\d+)\.(\d+)$/;
+  return allTags
+    .map((name) => {
+      const matches = name.match(validTagRegExp);
+      if (matches) {
+        const version = {
+          major: Number.parseInt(matches[1]),
+          minor: Number.parseInt(matches[2]),
+          patch: Number.parseInt(matches[3]),
+        };
+        return version;
+      }
+    })
+    .filter((x): x is Version => x !== undefined)
+    .sort(versionCmp);
+}
+
+async function main() {
+  // fetch list of all docker alpine images
+  const dockerUsername = Deno.env.get("DOCKER_USERNAME") as string;
+  const dockerPassword = Deno.env.get("DOCKER_PASSWORD") as string;
+  const dockerToken = await dockerLogin({
+    username: dockerUsername,
+    password: dockerPassword,
+  });
+  const allAlpineTags = await dockerListTags(dockerToken, {
+    namespace: "library",
+    repository: "alpine",
+  });
+
+  // fetch list of all package tags
+  const githubToken = Deno.env.get("GITHUB_TOKEN") as string;
+  const allPackageTags = await githubListContainerTags(githubToken, {
+    packageName: "mock-vsftpd",
+  });
+
+  const latestPackageVersion = allPackageTags[allPackageTags.length - 1];
+
+  const newestAlpineTags = allAlpineTags.filter((alpineTag) =>
+    versionCmp(latestPackageVersion, alpineTag) < 0
+  );
+
+  console.log(newestAlpineTags);
+
+  // workaroung for octokit
+  Deno.exit(0);
+}
+
+main();