direnv/direnv

Features

• Environment Variable Loaders - Automatically loads environment variables from external files when switching directories.
• Shell Environment Managers - Automatically manages terminal sessions by injecting and removing environment variables and system paths based on the current directory.
• Shell Hook Integrations - Injects hooks into the shell prompt or directory change events to trigger environment updates automatically.
• Context-Aware Environment Managers - Automatically switches runtime configurations and variables based on the current working directory.
• Directory-Based Variable Synchronizers - Automatically loads and unloads shell variables when switching directories to ensure a consistent project runtime.
• Path Variable Resolvers - Resolves relative paths and variable references into absolute values based on the project root directory.
• Environment Loaders - Provides a system for loading environment variables from local files into the process environment upon directory entry.
• Directory-Triggered Variable Loading - Loads and unloads environment variables automatically upon entering or leaving a directory using local configuration files.
• Subshell Environment Isolation - Runs configuration scripts in a separate process to capture environment changes without polluting the primary shell state.
• Project Workflow Automation - Automatically loads and unloads shell variables and paths when switching between different project directories.
• Environment State Patching - Calculates the precise difference between current and target environments to export only necessary shell changes.
• Language Runtime Administration - Automatically switches active language versions and virtual environments based on the current working directory.
• Local Project - Creates distinct shell configurations for different projects to prevent environment clutter and dependency conflicts.
• Project-Specific Shell Isolation - Prevents dependency conflicts by creating distinct shell configurations and local binary paths for separate projects.
• Shell Configuration Isolators - Keeps project dependencies and language runtimes separate by localizing shell configurations.
• Recursive Directory Traversers - Searches upward through the directory hierarchy from the current working directory to locate configuration files.
• Context-Isolated - Runs a specific command within a target directory's context without permanently altering the current shell state.
• Dependency Isolation Tools - Isolates language-specific libraries and binaries by storing them within local project folders.
• Language Runtimes - Configures language-specific virtual environments, project paths, and binaries for various runtimes.
• Environment Variable Enforcement - Validates the presence of required environment variables and enforces execution rules.
• Environment Difference Export - Generates a list of environment variable changes based on a directory configuration for specific shell formats.
• Environment Variable Management - Expands variable references within environment files to allow dynamic value assignment.
• Local Profile Managers - Directs Nix package installations to project-specific directories and adds them to the shell path.
• Nix Shell Integrations - Loads variables and packages from Nix flakes or shell specifications directly into the current shell session.
• Package Management Integrations - Loads build environments and variables from external package managers based on local configuration.
• Path Managers - Manages the system search path by adding or removing directories while preserving order.
• Remote Script Verifiers - Downloads remote scripts and verifies their integrity via hash before loading them into the session.
• Shell Workflow Optimizers - Reduces shell configuration clutter by moving project-specific exports out of global profile files.
• File Change Detection - Tracks specific files for modifications and triggers an automatic environment reload when changes are detected.
• Environment Layouts - Uses predefined layouts to automatically configure the environment for various languages and tools.
• Configuration File Authorization - Allows users to explicitly authorize or revoke permission for specific environment files to prevent untrusted code execution.
• Execution Authorization Policies - Maintains an allow-list of authorized files to ensure untrusted code is not executed during environment loading.
• Script Execution Authorizations - Implements a security model that requires explicit user authorization before executing environment scripts in a directory.
• Directory Trust Markers - Enables marking specific folders as trusted to automatically evaluate all environment scripts within that hierarchy.
• Nix Integrations - Integrates with Nix flakes and shell specifications to load project-specific environment variables automatically.
• Path Resolution Utilities - Calculates absolute paths relative to a directory or searches upward through the folder tree.
• Command Line Shell Enhancements - Unclutter your shell profile environment variables.
• Shell Integrations - Manages environment variables per directory.
• Terminal Productivity - Environment switcher for shell directories.

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