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* Native Executor - Non-Docker job execution
*
* Runs build commands directly on the host OS in an isolated temp workspace.
* Designed for iOS/macOS builds that require native toolchains (Xcode, etc.)
* which are not available inside Docker containers.
*
* Security model:
* - Jobs run in an isolated temp directory (not the developer's workspace)
* - Environment variables are explicitly injected (PATH preserved)
* - Timeout enforcement with graceful shutdown (SIGTERM → 10s → SIGKILL)
*/
import { Executor, ExecutionOptions, ExecutionResult } from './types.js';
import { spawn, ChildProcess } from 'child_process';
import { promises as fs } from 'fs';
import { join } from 'path';
import { tmpdir } from 'os';
import { randomUUID } from 'crypto';
export interface NativeExecutorConfig {
allowedPaths?: string[];
userIsolation?: boolean;
sandboxProfile?: string;
defaultTimeout?: number; // milliseconds
}
export class NativeExecutor implements Executor {
readonly type = 'native' as const;
private tempWorkspaces: Set<string> = new Set();
constructor(private config: NativeExecutorConfig = {}) {}
async validate(): Promise<{ valid: boolean; errors: string[] }> {
const errors: string[] = [];
// 1. Check OS is macOS or Linux
const platform = process.platform;
if (platform !== 'darwin' && platform !== 'linux') {
errors.push(`Native execution is not supported on ${platform}. Requires macOS or Linux.`);
}
// 2. Check temp directory is writable
const testDir = join(tmpdir(), `buildhive-validate-${randomUUID()}`);
try {
await fs.mkdir(testDir, { recursive: true });
const testFile = join(testDir, 'test');
await fs.writeFile(testFile, 'test');
await fs.rm(testDir, { recursive: true, force: true });
} catch {
errors.push(`Temp directory ${tmpdir()} is not writable`);
}
// 3. Check shell is available
const shellAvailable = await this.checkShellAvailable();
if (!shellAvailable) {
errors.push('No supported shell found (bash or zsh)');
}
return {
valid: errors.length === 0,
errors,
};
}
async execute(options: ExecutionOptions): Promise<ExecutionResult> {
const startTime = Date.now();
const timeout = options.timeout ?? this.config.defaultTimeout ?? 600_000; // 10 min default
// 1. Create isolated workspace
const workspace = join(tmpdir(), `buildhive-native-${randomUUID()}`);
await fs.mkdir(workspace, { recursive: true });
this.tempWorkspaces.add(workspace);
// Ensure workDir exists (may be the workspace itself or a subdirectory)
const workDir = options.workDir || workspace;
await fs.mkdir(workDir, { recursive: true });
let stdout = '';
let stderr = '';
let logs = '';
try {
// 2. Build environment: preserve PATH and SDK paths, merge user env
const environment = this.buildEnvironment(options.environment);
// 3. Resolve shell
const shell = await this.resolveShell();
// 4. Spawn child process
const result = await new Promise<{ exitCode: number }>((resolve, reject) => {
const proc: ChildProcess = spawn(shell, ['-c', options.command], {
cwd: workDir,
env: environment,
stdio: ['ignore', 'pipe', 'pipe'],
});
let killed = false;
let killTimer: ReturnType<typeof setTimeout> | undefined;
// Timeout enforcement: SIGTERM then SIGKILL after 10s
const timeoutTimer = setTimeout(() => {
if (!killed) {
killed = true;
proc.kill('SIGTERM');
killTimer = setTimeout(() => {
proc.kill('SIGKILL');
}, 10_000);
}
}, timeout);
// Abort signal handling
const onAbort = () => {
if (!killed) {
killed = true;
proc.kill('SIGTERM');
killTimer = setTimeout(() => {
proc.kill('SIGKILL');
}, 10_000);
}
};
if (options.abortSignal) {
options.abortSignal.addEventListener('abort', onAbort, { once: true });
}
// Stream stdout
proc.stdout?.on('data', (data: Buffer) => {
const text = data.toString();
stdout += text;
// Stream line by line to onLog
const lines = text.split('\n');
for (const line of lines) {
if (line.length > 0) {
logs += line + '\n';
options.onLog?.(line);
}
}
});
// Stream stderr
proc.stderr?.on('data', (data: Buffer) => {
const text = data.toString();
stderr += text;
const lines = text.split('\n');
for (const line of lines) {
if (line.length > 0) {
logs += line + '\n';
options.onLog?.(line);
}
}
});
proc.on('close', (code: number | null) => {
clearTimeout(timeoutTimer);
if (killTimer) clearTimeout(killTimer);
if (options.abortSignal) {
options.abortSignal.removeEventListener('abort', onAbort);
}
if (killed && code === null) {
resolve({ exitCode: 143 }); // SIGTERM exit code
} else {
resolve({ exitCode: code ?? 1 });
}
});
proc.on('error', (err: Error) => {
clearTimeout(timeoutTimer);
if (killTimer) clearTimeout(killTimer);
if (options.abortSignal) {
options.abortSignal.removeEventListener('abort', onAbort);
}
reject(err);
});
});
// 5. Collect artifacts
const artifacts = await this.collectArtifacts(
workDir,
options.artifactPaths || []
);
const durationMs = Date.now() - startTime;
return {
exitCode: result.exitCode,
stdout,
stderr,
durationMs,
artifacts,
logs,
};
} catch (error) {
const durationMs = Date.now() - startTime;
return {
exitCode: 1,
stdout,
stderr: stderr + (error instanceof Error ? error.message : String(error)),
durationMs,
artifacts: [],
logs,
};
}
}
async cleanup(): Promise<void> {
const removePromises = Array.from(this.tempWorkspaces).map(async (dir) => {
try {
await fs.rm(dir, { recursive: true, force: true });
} catch {
// Ignore cleanup errors
}
});
await Promise.all(removePromises);
this.tempWorkspaces.clear();
}
/**
* Build the environment for the child process.
* Preserves PATH and common SDK paths from the system, then merges user-provided vars.
*/
private buildEnvironment(
userEnv?: Record<string, string>
): Record<string, string> {
// Start with essential system env vars
const base: Record<string, string> = {};
// Preserve PATH
if (process.env.PATH) {
base.PATH = process.env.PATH;
}
// Preserve common SDK paths
const sdkVars = [
'HOME',
'USER',
'SHELL',
'LANG',
'JAVA_HOME',
'ANDROID_HOME',
'ANDROID_SDK_ROOT',
'DEVELOPER_DIR', // Xcode
'SDKROOT',
];
for (const key of sdkVars) {
if (process.env[key]) {
base[key] = process.env[key] as string;
}
}
// Merge user-provided environment (overrides base)
return { ...base, ...(userEnv || {}) };
}
/**
* Resolve the best available shell.
*/
private async resolveShell(): Promise<string> {
// Prefer bash, fall back to zsh, then sh
for (const shell of ['/bin/bash', '/bin/zsh', '/bin/sh']) {
try {
await fs.access(shell);
return shell;
} catch {
continue;
}
}
return '/bin/sh';
}
/**
* Check if a supported shell is available.
*/
private async checkShellAvailable(): Promise<boolean> {
for (const shell of ['/bin/bash', '/bin/zsh', '/bin/sh']) {
try {
await fs.access(shell);
return true;
} catch {
continue;
}
}
return false;
}
/**
* Collect artifacts matching glob-like patterns from the workDir.
* Walks the directory tree and matches files against the patterns.
* Patterns can include ** for recursive matching and * for single-segment matching.
*/
private async collectArtifacts(
workDir: string,
patterns: string[]
): Promise<string[]> {
if (patterns.length === 0) {
return [];
}
const allFiles = await this.walkDirectory(workDir);
const matched: string[] = [];
for (const filePath of allFiles) {
// Get path relative to workDir
const relativePath = filePath.substring(workDir.length + 1);
for (const pattern of patterns) {
if (this.matchPattern(relativePath, pattern)) {
matched.push(filePath);
break; // Don't add same file twice
}
}
}
return matched;
}
/**
* Recursively walk a directory and return all file paths.
*/
private async walkDirectory(dir: string): Promise<string[]> {
const files: string[] = [];
try {
const entries = await fs.readdir(dir, { withFileTypes: true });
for (const entry of entries) {
const fullPath = join(dir, entry.name);
if (entry.isDirectory()) {
const subFiles = await this.walkDirectory(fullPath);
files.push(...subFiles);
} else {
files.push(fullPath);
}
}
} catch {
// Directory doesn't exist or isn't readable
}
return files;
}
/**
* Simple glob-like pattern matching.
* Supports * (any segment chars) and ** (any path depth).
*/
private matchPattern(filePath: string, pattern: string): boolean {
// Convert glob to regex
const regexStr = pattern
.replace(/\./g, '\\.')
.replace(/\*\*/g, '{{GLOBSTAR}}')
.replace(/\*/g, '[^/]*')
.replace(/\{\{GLOBSTAR\}\}/g, '.*');
const regex = new RegExp(`^${regexStr}$`);
return regex.test(filePath);
}
}
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