$ show depjs/dep
dep is a Node.js dependency installer that provides npm-compatible install, lock, and run commands with zero runtime dependencies. It resolves dependency trees, downloads packages, verifies integrity, and links them into node_modules. The architecture is modular with separate concerns for installation, lockfile generation, and script execution. Key features include workspace support, bounded concurrency, platform/engine constraint handling, optionalDependencies, peerDependencies, bundledDependencies, overrides, and aliased specifiers. The tool is designed for end-users rather than package authors, focusing on installing, locking, and running scripts.
The LLM identified 5 files worth highlighting for reuse:
Implements a bounded concurrency runner that limits simultaneous async operations. Extractable as a standalone utility for any project needing to control parallelism in network requests, file operations, or CPU-intensive tasks. Demonstrates clean queue management with proper error handling and slot reclamation.
Provides streaming hash verification for downloaded tarballs without buffering entire files. Supports both SRI (sha512) and legacy shasum (sha1) formats. Can be extracted for use in any download verification scenario where memory efficiency and security are important.
Creates platform-appropriate shims for executable binaries (symlinks on POSIX, .cmd/.ps1/.sh on Windows). Handles shebang parsing, environment variable propagation, and interpreter resolution. Non-trivial cross-platform implementation that could be used in any tool needing to create executable links.
Implements npm-like dependency resolution with hoisting, deduplication, and constraint handling. Processes dependency graphs in two phases: concurrent metadata fetching followed by deterministic tree building. Handles overrides, optional dependencies, platform/engine constraints, and aliased specifiers. Represents sophisticated dependency resolution logic.
Wraps Node.js fetch with automatic User-Agent handling, credential extraction from .npmrc, Authorization header construction, and error messages with helpful auth hints. Includes URL credential redaction for security. Extractable as a robust HTTP client for any project needing registry or HTTP API interactions.