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* Hugo Downloader Service
*
* Downloads and installs Hugo binaries from GitHub releases.
* Uses async generators for streaming progress updates via SSE.
*/
import fs from 'fs-extra';
import path from 'path';
import { extract } from 'tar';
import AdmZip from 'adm-zip';
import type { PathHelper, EnvironmentInfo } from '../../utils/path-helper.js';
import type { OutputConsole } from '../../adapters/types.js';
// ============================================================================
// Types
// ============================================================================
export interface HugoEnvironment {
platform: 'macOS' | 'windows' | 'linux';
arch: 'x64' | 'x32';
}
export interface DownloadProgress {
percent: number;
message: string;
complete: boolean;
error?: string;
}
export interface HugoDownloaderDependencies {
pathHelper: PathHelper;
outputConsole: OutputConsole;
environmentInfo: EnvironmentInfo;
}
/**
* Builds download URLs for official Hugo releases from GitHub
*/
export class OfficialHugoSourceUrlBuilder {
/**
* Build the download URL for a specific Hugo version and environment
*/
build(environment: HugoEnvironment, version: string): string {
// Strip leading 'v' if present
const normalizedVersion = version.replace(/^v/i, '');
const versionMain = parseInt(normalizedVersion.split('.')[1], 10);
// Determine architecture string
let arch: string;
switch (environment.arch) {
case 'x32':
arch = '32bit';
break;
case 'x64':
// Hugo 0.103+ uses 'amd64' instead of '64bit'
arch = versionMain >= 103 ? 'amd64' : '64bit';
break;
default:
throw new Error(`Unsupported architecture: ${environment.arch}`);
}
// Determine platform string and format
let platform: string;
let format: string;
switch (environment.platform) {
case 'linux':
// Hugo 0.103+ uses lowercase platform names
platform = versionMain >= 103 ? 'linux' : 'Linux';
format = 'tar.gz';
break;
case 'windows':
platform = versionMain >= 103 ? 'windows' : 'Windows';
format = 'zip';
break;
case 'macOS':
platform = versionMain >= 103 ? 'darwin' : 'macOS';
// Hugo 0.102+ uses universal binary for macOS
if (versionMain >= 102) {
arch = 'universal';
}
format = 'tar.gz';
break;
default:
throw new Error(`Unsupported platform: ${environment.platform}`);
}
// Build URL - note: extended_ prefix is part of version string, not URL path
const cleanVersion = normalizedVersion.replace('extended_', '');
return `https://github.com/gohugoio/hugo/releases/download/v${cleanVersion}/hugo_${normalizedVersion}_${platform}-${arch}.${format}`;
}
}
/**
* Unpacks downloaded Hugo archives using node-tar (Linux/macOS) and adm-zip (Windows)
*/
export class OfficialHugoUnpacker {
/**
* Unpack a Hugo archive for Linux/macOS (tar.gz format)
*/
private async unpackLinux(packagePath: string): Promise<void> {
const normalizedPath = path.normalize(packagePath);
const output = path.dirname(normalizedPath);
await extract({
file: normalizedPath,
cwd: output,
filter: (filePath: string) => {
const basename = path.basename(filePath);
return basename === 'hugo' || basename.startsWith('hugo.');
},
});
const hugoBinary = path.join(output, 'hugo');
await fs.chmod(hugoBinary, 0o722);
}
/**
* Unpack a Hugo archive for Windows (zip format)
*/
private async unpackWindows(packagePath: string): Promise<void> {
const normalizedPath = path.normalize(packagePath);
const output = path.dirname(normalizedPath);
const zip = new AdmZip(normalizedPath);
for (const entry of zip.getEntries()) {
if (!entry.isDirectory && entry.name.endsWith('.exe')) {
zip.extractEntryTo(entry, output, false, true);
}
}
}
/**
* Unpack a Hugo archive based on platform
*/
async unpack(packagePath: string, environment: HugoEnvironment): Promise<void> {
switch (environment.platform) {
case 'linux':
case 'macOS':
return this.unpackLinux(packagePath);
case 'windows':
return this.unpackWindows(packagePath);
default:
throw new Error(`Unsupported platform: ${environment.platform}`);
}
}
}
/**
* Main Hugo downloader service
* Downloads Hugo binaries and streams progress via async generator
*/
export class HugoDownloader {
private isRunning = false;
private pathHelper: PathHelper;
private outputConsole: OutputConsole;
private environmentInfo: EnvironmentInfo;
private urlBuilder: OfficialHugoSourceUrlBuilder;
private unpacker: OfficialHugoUnpacker;
private abortController: AbortController | null = null;
private currentDownloadPath: string | null = null;
constructor(dependencies: HugoDownloaderDependencies) {
this.pathHelper = dependencies.pathHelper;
this.outputConsole = dependencies.outputConsole;
this.environmentInfo = dependencies.environmentInfo;
this.urlBuilder = new OfficialHugoSourceUrlBuilder();
this.unpacker = new OfficialHugoUnpacker();
}
/**
* Check if a specific Hugo version is installed
*/
isVersionInstalled(version: string): boolean {
const bin = this.pathHelper.getSSGBinForVer('hugo', version);
return fs.existsSync(bin);
}
/**
* Get the Hugo environment for downloads
*/
private getHugoEnvironment(): HugoEnvironment {
return {
platform: this.environmentInfo.platform,
arch: process.arch === 'x64' ? 'x64' : 'x32',
};
}
/**
* Download file from URL to destination
* Supports cancellation via AbortController
*/
private async downloadToFile(url: string, dest: string, signal?: AbortSignal): Promise<void> {
const dir = path.dirname(dest);
await fs.ensureDir(dir);
const response = await fetch(url, { method: 'GET', signal });
if (!response.ok) {
throw new Error(`Failed to download: ${response.status} ${response.statusText}`);
}
Iif (!response.body) {
throw new Error('Response body is null');
}
// Convert web ReadableStream to Node.js stream
const fileStream = fs.createWriteStream(dest);
const reader = response.body.getReader();
try {
while (true) {
// Check if cancelled before each read
Iif (signal?.aborted) {
throw new Error('Download cancelled');
}
const { done, value } = await reader.read();
if (done) break;
fileStream.write(Buffer.from(value));
}
} finally {
fileStream.end();
}
// Wait for file to finish writing
await new Promise<void>((resolve, reject) => {
fileStream.on('finish', resolve);
fileStream.on('error', reject);
});
}
/**
* Download Hugo version with progress updates via async generator
*/
async *download(version: string, skipExistCheck = false): AsyncGenerator<DownloadProgress> {
// Guard against concurrent downloads
if (this.isRunning) {
yield { percent: 0, message: 'Download already in progress', complete: false, error: 'Download already in progress' };
return;
}
// Check if already installed
if (!skipExistCheck && this.isVersionInstalled(version)) {
yield { percent: 100, message: 'Hugo already installed', complete: true };
return;
}
this.isRunning = true;
this.abortController = new AbortController();
try {
const environment = this.getHugoEnvironment();
const url = this.urlBuilder.build(environment, version);
const tempDest = path.join(this.pathHelper.getSSGBinDirForVer('hugo', version), 'download.partial');
this.currentDownloadPath = tempDest;
// Clean up any existing partial download
if (fs.existsSync(tempDest)) {
await fs.unlink(tempDest);
}
// Check if cancelled
Iif (this.abortController.signal.aborted) {
yield { percent: 0, message: 'Download cancelled', complete: false, error: 'Download cancelled' };
return;
}
// Progress: Starting
yield { percent: 0, message: 'Starting Hugo installation...', complete: false };
this.outputConsole.appendLine(`Hugo installation started. Downloading package from ${url}...`);
// Progress: Preparing
yield { percent: 20, message: 'Preparing download...', complete: false };
// Check if cancelled
Iif (this.abortController.signal.aborted) {
yield { percent: 0, message: 'Download cancelled', complete: false, error: 'Download cancelled' };
return;
}
// Progress: Downloading
yield { percent: 30, message: 'Downloading Hugo...', complete: false };
await this.downloadToFile(url, tempDest, this.abortController.signal);
// Check if cancelled
Iif (this.abortController.signal.aborted) {
yield { percent: 0, message: 'Download cancelled', complete: false, error: 'Download cancelled' };
return;
}
// Progress: Unpacking
yield { percent: 70, message: 'Unpacking Hugo...', complete: false };
this.outputConsole.appendLine('Unpacking...');
await this.unpacker.unpack(tempDest, environment);
// Clean up temp file
Iif (fs.existsSync(tempDest)) {
await fs.unlink(tempDest);
}
// Progress: Complete
yield { percent: 100, message: 'Hugo installation completed', complete: true };
this.outputConsole.appendLine('Hugo installation completed.');
} catch (error) {
// Clean up partial download on error
await this.cleanupPartialDownload();
const errorMessage = error instanceof Error ? error.message : String(error);
// Don't log cancellation as an error
Eif (errorMessage !== 'Download cancelled' && !errorMessage.includes('aborted')) {
this.outputConsole.appendLine(`Hugo installation failed: ${errorMessage}`);
}
yield { percent: 0, message: `Installation failed: ${errorMessage}`, complete: false, error: errorMessage };
} finally {
this.isRunning = false;
this.abortController = null;
this.currentDownloadPath = null;
}
}
/**
* Cancel the current download and clean up partial files
*/
async cancel(): Promise<void> {
if (this.abortController) {
this.abortController.abort();
}
await this.cleanupPartialDownload();
this.isRunning = false;
this.abortController = null;
this.currentDownloadPath = null;
this.outputConsole.appendLine('Hugo download cancelled.');
}
/**
* Clean up any partial download files
*/
private async cleanupPartialDownload(): Promise<void> {
Iif (this.currentDownloadPath && fs.existsSync(this.currentDownloadPath)) {
try {
await fs.unlink(this.currentDownloadPath);
this.outputConsole.appendLine('Cleaned up partial download file.');
} catch {
// Ignore cleanup errors
}
}
}
/**
* Ensure Hugo version is available - download if not installed
* This is a convenience method that consumes the generator
*/
async ensureAvailable(version: string): Promise<void> {
for await (const progress of this.download(version)) {
if (progress.error) {
throw new Error(progress.error);
}
}
}
}
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