setup-buildx-action/src/buildx.ts

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import * as fs from 'fs';
import * as path from 'path';
import * as semver from 'semver';
import * as util from 'util';
import * as context from './context';
import * as exec from './exec';
import * as github from './github';
import * as core from '@actions/core';
import * as tc from '@actions/tool-cache';
export async function getVersion(): Promise<string> {
return await exec.exec(`docker`, ['buildx', 'version'], true).then(res => {
if (res.stderr != '' && !res.success) {
throw new Error(res.stderr);
}
return parseVersion(res.stdout);
});
}
export async function parseVersion(stdout: string): Promise<string> {
const matches = /\sv?([0-9.]+)/.exec(stdout);
if (!matches) {
throw new Error(`Cannot parse Buildx version`);
}
return semver.clean(matches[1]);
}
export async function isAvailable(): Promise<Boolean> {
return await exec.exec(`docker`, ['buildx'], true).then(res => {
if (res.stderr != '' && !res.success) {
return false;
}
return res.success;
});
}
export async function countBuilders(): Promise<number> {
return await exec.exec(`docker`, ['buildx', 'ls'], true).then(res => {
if (res.stderr != '' && !res.success) {
throw new Error(`Cannot list builders: ${res.stderr}`);
}
return (res.stdout.trim().split(`\n`).length - 1) / 2;
});
}
export async function platforms(): Promise<String | undefined> {
return await exec.exec(`docker`, ['buildx', 'inspect'], true).then(res => {
if (res.stderr != '' && !res.success) {
throw new Error(res.stderr);
}
for (const line of res.stdout.trim().split(`\n`)) {
if (line.startsWith('Platforms')) {
return line.replace('Platforms: ', '').replace(/\s/g, '').trim();
}
}
});
}
export async function install(inputVersion: string, dockerConfigHome: string): Promise<string> {
const release: github.GitHubRelease | null = await github.getRelease(inputVersion);
if (!release) {
throw new Error(`Cannot find buildx ${inputVersion} release`);
}
core.debug(`Release found: ${release.tag_name}`);
const version = release.tag_name.replace(/^v+|v+$/g, '');
let toolPath: string;
toolPath = tc.find('buildx', version);
if (!toolPath) {
const c = semver.clean(version) || '';
if (!semver.valid(c)) {
throw new Error(`Invalid Buildx version "${version}".`);
}
toolPath = await download(version);
}
const pluginsDir: string = path.join(dockerConfigHome, 'cli-plugins');
core.debug(`Plugins dir is ${pluginsDir}`);
if (!fs.existsSync(pluginsDir)) {
fs.mkdirSync(pluginsDir, {recursive: true});
}
const filename: string = context.osPlat == 'win32' ? 'docker-buildx.exe' : 'docker-buildx';
const pluginPath: string = path.join(pluginsDir, filename);
core.debug(`Plugin path is ${pluginPath}`);
fs.copyFileSync(path.join(toolPath, filename), pluginPath);
core.info('🔨 Fixing perms...');
fs.chmodSync(pluginPath, '0755');
return pluginPath;
}
async function download(version: string): Promise<string> {
const targetFile: string = context.osPlat == 'win32' ? 'docker-buildx.exe' : 'docker-buildx';
const downloadUrl = util.format(
'https://github.com/docker/buildx/releases/download/v%s/%s',
version,
await filename(version)
);
let downloadPath: string;
try {
core.info(`⬇️ Downloading ${downloadUrl}...`);
downloadPath = await tc.downloadTool(downloadUrl);
core.debug(`Downloaded to ${downloadPath}`);
} catch (error) {
throw error;
}
return await tc.cacheFile(downloadPath, targetFile, 'buildx', version);
}
async function filename(version: string): Promise<string> {
let arch: string;
switch (context.osArch) {
case 'x64': {
arch = 'amd64';
break;
}
case 'ppc64': {
arch = 'ppc64le';
break;
}
case 'arm': {
const arm_version = (process.config.variables as any).arm_version;
arch = arm_version ? 'arm-v' + arm_version : 'arm';
break;
}
default: {
arch = context.osArch;
break;
}
}
const platform: string = context.osPlat == 'win32' ? 'windows' : context.osPlat;
const ext: string = context.osPlat == 'win32' ? '.exe' : '';
return util.format('buildx-v%s.%s-%s%s', version, platform, arch, ext);
}