# Stash User Guide - Enhanced GNU Stow Replacement

## Table of Contents

1. [Introduction](#introduction)
2. [Installation](#installation)
   - [Using Guix](#using-guix)
   - [Manual Installation](#manual-installation)
3. [Shell Configuration](#shell-configuration)
4. [GNU Stow-like Features](#gnu-stow-like-features)
   - [Deploy Mode](#deploy-mode)
   - [Dot Syntax](#dot-syntax)
   - [Package Management](#package-management)
5. [Traditional Stashing](#traditional-stashing)
6. [Restoration](#restoration)
7. [Intelligent Stashing](#intelligent-stashing)
8. [Common Use Cases](#common-use-cases)
9. [Advanced Features](#advanced-features)
10. [Configuration](#configuration)
11. [Troubleshooting](#troubleshooting)
12. [Tips and Best Practices](#tips-and-best-practices)

## Introduction

Stash is a powerful symlink management utility written in Guile Scheme that serves as an enhanced replacement for GNU Stow. It helps you organize your files by moving them to a target location while maintaining easy access through symbolic links. With intelligent stashing, restoration capabilities, and GNU Stow-like deployment features, it's perfect for managing dotfiles and any other directory organization needs.

### Why Use Stash?

- **Keep Your Files Organized**: Move files to logical storage locations while maintaining easy access
- **Backup with Access**: Store files in backup locations without changing your workflow
- **Dotfile Management**: Perfect for managing configuration files across different machines
- **Project Organization**: Archive old projects while keeping them accessible
- **Cross-device File Management**: Safely manage files across different storage devices

## Installation

### Prerequisites

- Guile Scheme 3.0.9 or later
- Unix-like environment (Linux/macOS)

### Using Guix

The recommended way to install Stash is using the Guix package manager:

```sh
# Install from local package definition
guix package --install-from-file=minimal-package.scm
```

After installation, the `stash` executable will be available in your Guix profile at `~/.guix-profile/bin/stash`.

### Manual Installation

If you're not using Guix, you can install Stash manually:

1. Install prerequisites:

   ```sh
   # Debian/Ubuntu
   sudo apt-get install guile-3.0

   # Fedora
   sudo dnf install guile30

   # Arch Linux
   sudo pacman -S guile
   ```

2. Clone and set up the repository:

   ```sh
   git clone https://codeberg.org/glenneth/stash.git
   cd stash
   mkdir -p ~/.guile.d/site/3.0
   ln -s $(pwd)/modules/stash ~/.guile.d/site/3.0/
   ```

## Shell Configuration

### Fish Shell

1. Add to `~/.config/fish/config.fish`:

   ```fish
   # Guix environment setup
   set -gx GUIX_PROFILE $HOME/.guix-profile
   set -gx PATH $GUIX_PROFILE/bin $PATH

   # Load Guix environment variables
   if test -f $GUIX_PROFILE/etc/profile
       for line in (cat $GUIX_PROFILE/etc/profile | grep '^export' | string replace 'export ' '')
           set var (string split '=' $line)
           set -gx $var[1] (eval echo $var[2])
       end
   end
   ```

2. Alternative method using symlink:

   ```fish
   ln -sf ~/.guix-profile/bin/stash ~/.local/bin/stash
   ```

### Bash Shell

Add to `~/.bashrc`:

```bash
# Guix environment setup
export GUIX_PROFILE="$HOME/.guix-profile"
if [ -f "$GUIX_PROFILE/etc/profile" ]; then
    . "$GUIX_PROFILE/etc/profile"
fi
```

### Zsh Shell

Add to `~/.zshrc`:

```zsh
# Guix environment setup
export GUIX_PROFILE="$HOME/.guix-profile"
if [ -f "$GUIX_PROFILE/etc/profile" ]; then
    . "$GUIX_PROFILE/etc/profile"
fi
```

## GNU Stow-like Features

Stash provides enhanced GNU Stow replacement functionality with intelligent behavior and additional features.

### Deploy Mode

Deploy mode (`-d`) allows you to batch deploy all packages from a dotfiles repository, similar to GNU Stow:

```sh
# Deploy all packages from current directory
cd ~/.dotfiles && stash -d

# Deploy all packages with explicit path
stash -d /path/to/dotfiles
```

**How it works:**
- Scans the current directory for subdirectories (packages)
- Creates symlinks from each package's contents to the home directory
- Automatically handles directory structure creation
- Skips system files like `.git`, `README.md`, etc.

### Dot Syntax

The dot syntax (`.`) provides reverse symlinking - creating a symlink from the current directory back to its corresponding location in the home directory:

```sh
# From within a dotfiles package directory
cd ~/.dotfiles/shell
stash .
# Creates: ~/.shell -> ~/.dotfiles/shell
```

**Use cases:**
- Quick reverse linking from dotfiles repo
- Testing configurations before full deployment
- Selective package activation

### Package Management

Deploy specific packages by name:

```sh
# Deploy only the shell package
cd ~/.dotfiles && stash shell

# Deploy only the emacs package  
cd ~/.dotfiles && stash emacs
```

**Package structure example:**
```
~/.dotfiles/
├── shell/
│   ├── zshrc
│   └── bashrc
├── emacs/
│   ├── config.org
│   └── init.el
└── git/
    └── gitconfig
```

## Restoration

Stash includes complete restoration capabilities with metadata tracking:

```sh
# Restore a specific file
stash -R -s ~/.files/config/app/config.yml

# Restore using metadata
stash -R -s /path/to/stashed/file
```

**Features:**
- Each stashed file includes `.stash-meta` metadata
- Metadata contains original path information
- Automatic directory structure recreation
- Safe restoration with conflict detection

## Intelligent Stashing

Stash automatically detects existing symlinks and adapts its behavior:

**File-level stashing:** When a directory already contains symlinks, stash operates at the file level to avoid "symlink to symlink" issues.

**Directory-level stashing:** When no symlinks exist, stash can move entire directories.

```sh
# First file - directory level stashing
stash -s ~/.config/app/config.yml -t ~/.files

# Second file - detects existing symlink, uses file-level stashing  
stash -s ~/.config/app/theme.json -t ~/.files
```

## Traditional Stashing

### How Stash Works

1. **Source Directory**: The original location of your files
2. **Target Directory**: Where you want to store the files
3. **Symbolic Links**: Created in the source location, pointing to the target

### Key Terms

- **Stashing**: The process of moving files to a target location and creating symlinks
- **Dot Syntax**: A shorthand way to create symlinks for previously stashed files
- **Recursive Mode**: Processing entire directory trees

## Usage Patterns

### 1. Interactive Mode

Best for beginners or when you want to choose the target location interactively.

```sh
stash --source ~/Pictures --interactive
```

### 2. Explicit Paths

When you know exactly where you want to store files.

```sh
stash --source ~/Documents/notes --target ~/backup/notes
```

### 3. Dot Syntax

Quick way to create symlinks for previously stashed files.

```sh
cd ~/.dotfiles/config/nvim
stash .    # Creates symlink in ~/.config/nvim
```

### 4. Recursive Mode

For processing entire directory trees.

```sh
stash --source ~/.config --target ~/.dotfiles/config --recursive
```

## Common Use Cases

### 1. Managing Dotfiles

Keep configuration files in a git repository:

```sh
# Initial stash
stash --source ~/.config/nvim --target ~/.dotfiles/config/nvim

# Later, on another machine
cd ~/.dotfiles/config/nvim
stash .
```

### 2. Project Organization

Archive old projects while keeping them accessible:

```sh
stash --source ~/projects/old-webapp --target ~/archive/projects/webapp
```

### 3. Cross-device File Management

Store large files on external drives:

```sh
stash --source ~/Videos --target /media/external/videos --recursive
```

## Advanced Features

### 1. Path Handling

- Supports home directory expansion (~)
- Handles both absolute and relative paths
- Maintains directory structure in target location

### 2. Symlink Management

- Creates intermediate directories as needed
- Handles existing symlinks gracefully
- Preserves original file permissions

### 3. Ignore Patterns

- Create `.stashignore` in source directory
- Add patterns similar to `.gitignore`

```sh
*.tmp
.DS_Store
node_modules/
```

### 4. Conflict Resolution

- Automatically detects existing files/symlinks
- Interactive prompts for resolution
- Options to skip, replace, or backup

## Configuration

### Environment Variables

- `GUILE_AUTO_COMPILE=0`: Disable auto-compilation
- `GUILE_LOAD_PATH`: Add custom module paths
- `GUIX_PROFILE`: Set Guix profile location

### Global Configuration

- System-wide ignore patterns in `/etc/stash/ignore`
- User-specific patterns in `~/.config/stash/ignore`

## Troubleshooting

### Common Issues and Solutions

1. **Command Not Found**
   - Verify Guix profile is sourced correctly
   - Check PATH includes `~/.guix-profile/bin`
   - Try creating symlink in `~/.local/bin`

2. **Module Loading Issues**
   - Ensure GUILE_LOAD_PATH includes module directory
   - Check module permissions and ownership
   - Verify Guile version compatibility

3. **Permission Errors**
   - Check file/directory permissions
   - Ensure write access to target location
   - Verify symlink creation permissions

4. **Common Warnings**
   - "canonicalize-path override": Normal, can be ignored
   - "auto-compilation enabled": Set GUILE_AUTO_COMPILE=0

### Cross-device Issues

- Use the recursive flag for cross-device operations
- Ensure target location has sufficient space

## Tips and Best Practices

1. **Organization**

   - Keep related files together in the target location
   - Use meaningful directory names
   - Document your stash organization

2. **Backup**

   - Always back up important files before stashing
   - Test symlinks after creation
   - Use version control for dotfiles

3. **Maintenance**

   - Regularly check for broken symlinks
   - Keep your stash locations organized
   - Document your stash structure

## Command Reference

### Basic Commands

```sh
stash --help                 # Display help
stash --version             # Show version
stash --source DIR          # Specify source directory
stash --target DIR          # Specify target directory
stash --recursive           # Process directories recursively
stash --interactive         # Interactive target selection
```

For more information or to report issues, visit:
<https://codeberg.org/glenneth/stash>