don't depend on the GitHub API to check release

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

src/buildx.ts

@@ -4,9 +4,9 @@ import * as semver from 'semver';
 import * as util from 'util';
 import * as context from './context';
 import * as git from './git';
-import * as github from './github';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
+import * as httpm from '@actions/http-client';
 import * as tc from '@actions/tool-cache';
 
 export type Builder = {
@@ -25,6 +25,29 @@ export type Node = {
   platforms?: string;
 };
 
+export interface GitHubRelease {
+  id: number;
+  tag_name: string;
+  html_url: string;
+  assets: Array<string>;
+}
+
+export const getRelease = async (version: string): Promise<GitHubRelease> => {
+  const url = `https://raw.githubusercontent.com/docker/buildx/master/.github/releases.json`;
+  const http: httpm.HttpClient = new httpm.HttpClient('setup-buildx');
+  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];
+};
+
 export async function getConfigInline(s: string): Promise<string> {
   return getConfig(s, false);
 }
@@ -237,13 +260,8 @@ export async function build(inputBuildRef: string, dest: string, standalone: boo
   return setPlugin(toolPath, dest);
 }
 
-export async function install(inputVersion: string, githubToken: string, dest: string, standalone: boolean): Promise<string> {
-  let release: github.Release;
-  if (inputVersion == 'latest') {
-    release = await github.getLatestRelease(githubToken);
-  } else {
-    release = await github.getReleaseTag(inputVersion, githubToken);
-  }
+export async function install(inputVersion: string, dest: string, standalone: boolean): Promise<string> {
+  const release: GitHubRelease = await getRelease(inputVersion);
   core.debug(`Release ${release.tag_name} found`);
   const version = release.tag_name.replace(/^v+|v+$/g, '');
 

src/context.ts

@@ -36,7 +36,6 @@ export interface Inputs {
   config: string;
   configInline: string;
   append: string;
-  githubToken: string;
 }
 
 export async function getInputs(): Promise<Inputs> {
@@ -52,8 +51,7 @@ export async function getInputs(): Promise<Inputs> {
     endpoint: core.getInput('endpoint'),
     config: core.getInput('config'),
     configInline: core.getInput('config-inline'),
-    append: core.getInput('append'),
-    githubToken: core.getInput('github_token')
+    append: core.getInput('append')
   };
 }
 

src/github.ts

@@ -1,41 +0,0 @@
-import * as github from '@actions/github';
-
-export interface Release {
-  id: number;
-  tag_name: string;
-}
-
-const [owner, repo] = 'docker/buildx'.split('/');
-
-export const getReleaseTag = async (tag: string, githubToken: string): Promise<Release> => {
-  return (
-    await github
-      .getOctokit(githubToken, {
-        baseUrl: 'https://api.github.com'
-      })
-      .rest.repos.getReleaseByTag({
-        owner,
-        repo,
-        tag
-      })
-      .catch(error => {
-        throw new Error(`Cannot get release ${tag}: ${error}`);
-      })
-  ).data as Release;
-};
-
-export const getLatestRelease = async (githubToken: string): Promise<Release> => {
-  return (
-    await github
-      .getOctokit(githubToken, {
-        baseUrl: 'https://api.github.com'
-      })
-      .rest.repos.getLatestRelease({
-        owner,
-        repo
-      })
-      .catch(error => {
-        throw new Error(`Cannot get latest release: ${error}`);
-      })
-  ).data as Release;
-};

src/main.ts

@@ -42,7 +42,7 @@ async function run(): Promise<void> {
       core.endGroup();
     } else if (!(await buildx.isAvailable(standalone)) || inputs.version) {
       core.startGroup(`Download and install buildx`);
-      await buildx.install(inputs.version || 'latest', inputs.githubToken, standalone ? context.tmpDir() : dockerConfigHome, standalone);
+      await buildx.install(inputs.version || 'latest', standalone ? context.tmpDir() : dockerConfigHome, standalone);
       core.endGroup();
     }