From 96c92fc20654131837682dc9629e5eed22aa39b6 Mon Sep 17 00:00:00 2001
From: CrazyMax <crazy-max@users.noreply.github.com>
Date: Tue, 31 Jan 2023 00:11:16 +0100
Subject: [PATCH] buildx: getRelease

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
---
 __tests__/buildx.test.ts | 28 ++++++++++++++++++++++++++++
 package.json             |  1 +
 src/buildx.ts            | 24 ++++++++++++++++++++++++
 yarn.lock                |  1 +
 4 files changed, 54 insertions(+)

diff --git a/__tests__/buildx.test.ts b/__tests__/buildx.test.ts
index 944633a..78ea338 100644
--- a/__tests__/buildx.test.ts
+++ b/__tests__/buildx.test.ts
@@ -257,6 +257,34 @@ describe('getProvenanceAttrs', () => {
   });
 });
 
+describe('getRelease', () => {
+  it('returns latest buildx GitHub release', async () => {
+    const release = await Buildx.getRelease('latest');
+    expect(release).not.toBeNull();
+    expect(release?.tag_name).not.toEqual('');
+  });
+
+  it('returns v0.10.1 buildx GitHub release', async () => {
+    const release = await Buildx.getRelease('v0.10.1');
+    expect(release).not.toBeNull();
+    expect(release?.id).toEqual(90346950);
+    expect(release?.tag_name).toEqual('v0.10.1');
+    expect(release?.html_url).toEqual('https://github.com/docker/buildx/releases/tag/v0.10.1');
+  });
+
+  it('returns v0.2.2 buildx GitHub release', async () => {
+    const release = await Buildx.getRelease('v0.2.2');
+    expect(release).not.toBeNull();
+    expect(release?.id).toEqual(17671545);
+    expect(release?.tag_name).toEqual('v0.2.2');
+    expect(release?.html_url).toEqual('https://github.com/docker/buildx/releases/tag/v0.2.2');
+  });
+
+  it('unknown release', async () => {
+    await expect(Buildx.getRelease('foo')).rejects.toThrowError(new Error('Cannot find Buildx release foo in https://raw.githubusercontent.com/docker/buildx/master/.github/releases.json'));
+  });
+});
+
 describe('generateBuildSecret', () => {
   test.each([
     ['A_SECRET=abcdef0123456789', false, 'A_SECRET', 'abcdef0123456789', null],
diff --git a/package.json b/package.json
index 1c19988..a835115 100644
--- a/package.json
+++ b/package.json
@@ -40,6 +40,7 @@
     "@actions/core": "^1.10.0",
     "@actions/exec": "^1.1.1",
     "@actions/github": "^5.1.1",
+    "@actions/http-client": "^2.0.1",
     "csv-parse": "^5.3.3",
     "jwt-decode": "^3.1.2",
     "semver": "^7.3.8",
diff --git a/src/buildx.ts b/src/buildx.ts
index cfda283..0373863 100644
--- a/src/buildx.ts
+++ b/src/buildx.ts
@@ -2,12 +2,20 @@ import fs from 'fs';
 import path from 'path';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
+import * as httpm from '@actions/http-client';
 import {parse} from 'csv-parse/sync';
 import * as semver from 'semver';
 
 import {Docker} from './docker';
 import {Context} from './context';
 
+export interface GitHubRelease {
+  id: number;
+  tag_name: string;
+  html_url: string;
+  assets: Array<string>;
+}
+
 export interface BuildxOpts {
   context: Context;
   standalone?: boolean;
@@ -204,6 +212,22 @@ export class Buildx {
     return `${input},builder-id=${this.context.provenanceBuilderID}`;
   }
 
+  public static async getRelease(version: string): Promise<GitHubRelease> {
+    const url = `https://raw.githubusercontent.com/docker/buildx/master/.github/releases.json`;
+    const http: httpm.HttpClient = new httpm.HttpClient('docker-actions-toolkit');
+    const resp: httpm.HttpClientResponse = await http.get(url);
+    const body = await resp.readBody();
+    const statusCode = resp.message.statusCode || 500;
+    if (statusCode >= 400) {
+      throw new Error(`Failed to get Buildx release ${version} from ${url} with status code ${statusCode}: ${body}`);
+    }
+    const releases = <Record<string, GitHubRelease>>JSON.parse(body);
+    if (!releases[version]) {
+      throw new Error(`Cannot find Buildx release ${version} in ${url}`);
+    }
+    return releases[version];
+  }
+
   public static hasLocalExporter(exporters: string[]): boolean {
     return Buildx.hasExporterType('local', exporters);
   }
diff --git a/yarn.lock b/yarn.lock
index 8d8f330..07d384c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -744,6 +744,7 @@ __metadata:
     "@actions/core": ^1.10.0
     "@actions/exec": ^1.1.1
     "@actions/github": ^5.1.1
+    "@actions/http-client": ^2.0.1
     "@types/csv-parse": ^1.2.2
     "@types/node": ^16.18.11
     "@types/semver": ^7.3.13