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import { inspect } from "node:util";
import { $, isCI, spawn, spawnSafe, which } from "./utils.mjs";
export const docker = {
get name() {
return "docker";
},
/**
* @typedef {"linux" | "darwin" | "windows"} DockerOs
* @typedef {"amd64" | "arm64"} DockerArch
* @typedef {`${DockerOs}/${DockerArch}`} DockerPlatform
*/
/**
* @param {Platform} platform
* @returns {DockerPlatform}
*/
getPlatform(platform) {
const { os, arch } = platform;
if (arch === "aarch64") {
return `${os}/arm64`;
} else if (arch === "x64") {
return `${os}/amd64`;
}
throw new Error(`Unsupported platform: ${inspect(platform)}`);
},
/**
* @typedef DockerSpawnOptions
* @property {DockerPlatform} [platform]
* @property {boolean} [json]
*/
/**
* @param {string[]} args
* @param {DockerSpawnOptions & import("./utils.mjs").SpawnOptions} [options]
* @returns {Promise<unknown>}
*/
async spawn(args, options = {}) {
const docker = which("docker", { required: true });
let env = { ...process.env };
if (isCI) {
env["BUILDKIT_PROGRESS"] = "plain";
}
const { json, platform } = options;
if (json) {
args.push("--format=json");
}
if (platform) {
args.push(`--platform=${platform}`);
}
const { error, stdout } = await spawnSafe($`${docker} ${args}`, { env, ...options });
if (error) {
return;
}
if (!json) {
return stdout;
}
try {
return JSON.parse(stdout);
} catch {
return;
}
},
/**
* @typedef {Object} DockerImage
* @property {string} Id
* @property {string[]} RepoTags
* @property {string[]} RepoDigests
* @property {string} Created
* @property {DockerOs} Os
* @property {DockerArch} Architecture
* @property {number} Size
*/
/**
* @param {string} url
* @param {DockerPlatform} [platform]
* @returns {Promise<boolean>}
*/
async pullImage(url, platform) {
const done = await this.spawn($`pull ${url}`, {
platform,
throwOnError: error => !/No such image|manifest unknown/i.test(inspect(error)),
});
return !!done;
},
/**
* @param {string} url
* @param {DockerPlatform} [platform]
* @returns {Promise<DockerImage | undefined>}
*/
async inspectImage(url, platform) {
/** @type {DockerImage[]} */
const images = await this.spawn($`image inspect ${url}`, {
json: true,
throwOnError: error => !/No such image/i.test(inspect(error)),
});
if (!images) {
const pulled = await this.pullImage(url, platform);
if (pulled) {
return this.inspectImage(url, platform);
}
}
const { os, arch } = platform || {};
return images
?.filter(({ Os, Architecture }) => !os || !arch || (Os === os && Architecture === arch))
?.find((a, b) => (a.Created < b.Created ? 1 : -1));
},
/**
* @typedef {Object} DockerContainer
* @property {string} Id
* @property {string} Name
* @property {string} Image
* @property {string} Created
* @property {DockerContainerState} State
* @property {DockerContainerNetworkSettings} NetworkSettings
*/
/**
* @typedef {Object} DockerContainerState
* @property {"exited" | "running"} Status
* @property {number} [Pid]
* @property {number} ExitCode
* @property {string} [Error]
* @property {string} StartedAt
* @property {string} FinishedAt
*/
/**
* @typedef {Object} DockerContainerNetworkSettings
* @property {string} [IPAddress]
*/
/**
* @param {string} containerId
* @returns {Promise<DockerContainer | undefined>}
*/
async inspectContainer(containerId) {
const containers = await this.spawn($`container inspect ${containerId}`, { json: true });
return containers?.find(a => a.Id === containerId);
},
/**
* @returns {Promise<DockerContainer[]>}
*/
async listContainers() {
const containers = await this.spawn($`container ls --all`, { json: true });
return containers || [];
},
/**
* @typedef {Object} DockerRunOptions
* @property {string[]} [command]
* @property {DockerPlatform} [platform]
* @property {string} [name]
* @property {boolean} [detach]
* @property {"always" | "never"} [pull]
* @property {boolean} [rm]
* @property {"no" | "on-failure" | "always"} [restart]
*/
/**
* @param {string} url
* @param {DockerRunOptions} [options]
* @returns {Promise<DockerContainer>}
*/
async runContainer(url, options = {}) {
const { detach, command = [], ...containerOptions } = options;
const args = Object.entries(containerOptions)
.filter(([_, value]) => typeof value !== "undefined")
.map(([key, value]) => (typeof value === "boolean" ? `--${key}` : `--${key}=${value}`));
if (detach) {
args.push("--detach");
} else {
args.push("--tty", "--interactive");
}
const stdio = detach ? "pipe" : "inherit";
const result = await this.spawn($`run ${args} ${url} ${command}`, { stdio });
if (!detach) {
return;
}
const containerId = result.trim();
const container = await this.inspectContainer(containerId);
if (!container) {
throw new Error(`Failed to run container: ${inspect(result)}`);
}
return container;
},
/**
* @param {Platform} platform
* @returns {Promise<DockerImage>}
*/
async getBaseImage(platform) {
const { os, distro, release } = platform;
const dockerPlatform = this.getPlatform(platform);
let url;
if (os === "linux") {
if (distro === "debian" || distro === "ubuntu" || distro === "alpine") {
url = `docker.io/library/${distro}:${release}`;
} else if (distro === "amazonlinux") {
url = `public.ecr.aws/amazonlinux/amazonlinux:${release}`;
}
}
if (url) {
const image = await this.inspectImage(url, dockerPlatform);
if (image) {
return image;
}
}
throw new Error(`Unsupported platform: ${inspect(platform)}`);
},
/**
* @param {DockerContainer} container
* @param {MachineOptions} [options]
* @returns {Machine}
*/
toMachine(container, options = {}) {
const { Id: containerId } = container;
const exec = (command, options) => {
return spawn(["docker", "exec", containerId, ...command], options);
};
const execSafe = (command, options) => {
return spawnSafe(["docker", "exec", containerId, ...command], options);
};
const upload = async (source, destination) => {
await spawn(["docker", "cp", source, `${containerId}:${destination}`]);
};
const attach = async () => {
const { exitCode, error } = await spawn(["docker", "exec", "-it", containerId, "sh"], {
stdio: "inherit",
});
if (exitCode === 0 || exitCode === 130) {
return;
}
throw error;
};
const snapshot = async name => {
await spawn(["docker", "commit", containerId]);
};
const kill = async () => {
await spawn(["docker", "kill", containerId]);
};
return {
cloud: "docker",
id: containerId,
spawn: exec,
spawnSafe: execSafe,
upload,
attach,
snapshot,
close: kill,
[Symbol.asyncDispose]: kill,
};
},
/**
* @param {MachineOptions} options
* @returns {Promise<Machine>}
*/
async createMachine(options) {
const { Id: imageId, Os, Architecture } = await docker.getBaseImage(options);
const container = await docker.runContainer(imageId, {
platform: `${Os}/${Architecture}`,
command: ["sleep", "1d"],
detach: true,
rm: true,
restart: "no",
});
return this.toMachine(container, options);
},
};
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