# Tea CLI Installer

A comprehensive installer script for Gitea Tea CLI that supports multiple Linux distributions and installation methods.

## Features

- **Version Checking**: Only downloads and installs if newer version is available
- **Multiple Installation Methods**:
  - Package manager (apt, yum, dnf, zypper)
  - Binary download from Gitea releases
- **Cross-Platform Support**: Debian, Ubuntu, RHEL, CentOS, Fedora, Arch, openSUSE
- **Architecture Support**: x86_64 (amd64), ARM64, ARM
- **Automatic Updates**: Fetches latest version from Gitea API
- **Force Reinstall**: Option to force reinstall even if up-to-date

## Usage

### Basic Usage
```bash
# Install latest version (only if newer than current)
./install-tea-cli.sh

# Install specific version
./install-tea-cli.sh -v v0.11.0

# Force reinstall even if up-to-date
./install-tea-cli.sh --force
```

### Installation Methods
```bash
# Force installation from package manager
./install-tea-cli.sh --package

# Force installation from binary
./install-tea-cli.sh --binary
```

### Help
```bash
./install-tea-cli.sh --help
```

## Installation Logic

### Version Checking
1. **Check Current Version**: Detects installed Tea CLI version
2. **Fetch Latest**: Gets latest version from Gitea API
3. **Compare Versions**: Only proceeds if newer version available
4. **Force Override**: `--force` flag bypasses version check

### Installation Priority
1. **Package Manager** (preferred):
   - Debian/Ubuntu: Checks for official Tea CLI package
   - RHEL/CentOS/Fedora: Checks for available Tea CLI package
   - Arch Linux: Available in AUR (pacman)
   - openSUSE: Checks for available Tea CLI package

2. **Binary Download** (fallback):
   - Downloads platform-specific binary from Gitea releases
   - Supports x86_64, ARM64, ARM architectures
   - Installs to `/usr/local/bin/tea`

## File Locations

### Installation Directory
- Binary: `/usr/local/bin/tea`
- Symlink: `/usr/local/bin/tea-<version>`

## Version Comparison

The installer uses semantic version comparison:
- **Format**: `vX.Y.Z` (e.g., `v0.11.1`)
- **Logic**: Compares major, minor, patch versions
- **Build Info**: Ignores build hashes/identifiers

### Examples
```bash
# Current: 0.11.0, Latest: v0.11.1 → Update needed
# Current: 0.11.1, Latest: v0.11.1 → No update needed
# Current: 0.11.2, Latest: v0.11.1 → No update needed (newer installed)
```

## System Requirements

### Required
- `curl` or `wget` (for downloading)
- `sudo` access (for system-wide installation)

### Optional
- Package manager access (for package installations)
- Internet connection (for downloading releases)

## Supported Distributions

### Package Manager Support
- **Debian/Ubuntu**: Checks for official Tea CLI package
- **RHEL/CentOS/Fedora**: Checks for available Tea CLI package
- **Arch Linux**: Available in AUR (pacman)
- **openSUSE**: Checks for available Tea CLI package

### Binary Support
- **Linux x86_64**: `tea-0.11.1-linux-amd64`
- **Linux ARM64**: `tea-0.11.1-linux-arm64`
- **Linux ARM**: `tea-0.11.1-linux-arm-5`, `tea-0.11.1-linux-arm-6`, `tea-0.11.1-linux-arm-7`

## Troubleshooting

### Version Detection Issues
```bash
# Check current version manually
tea --version

# Force reinstall if version detection fails
./install-tea-cli.sh --force
```

### Permission Issues
```bash
# Ensure proper permissions
sudo chown root:root /usr/local/bin/tea
sudo chmod 755 /usr/local/bin/tea
```

### PATH Issues
```bash
# Check which tea is being used
which tea

# Check all tea installations
find /usr -name tea 2>/dev/null
find /home -name tea 2>/dev/null

# Update PATH if needed
export PATH="/usr/local/bin:$PATH"
```

## Examples

### Typical Workflow
```bash
# Check if update needed
./install-tea-cli.sh

# Output if up-to-date:
# [SUCCESS] You already have the latest version (0.11.1)
# [SUCCESS] No installation needed. Exiting.

# Output if update available:
# [INFO] Current version: 0.11.0
# [INFO] Latest version: v0.11.1
# [INFO] Newer version available: v0.11.1 > 0.11.0
# [SUCCESS] Installation completed successfully!
```

### Force Binary Installation
```bash
# Force binary installation
./install-tea-cli.sh --force --binary

# Output:
# [SUCCESS] Tea CLI binary installed successfully
# Next steps:
# 1. Test installation: tea --version
# 2. Configure login: tea login add
# 3. Use Tea CLI: tea --help
```

## Integration with Setup Script

The Tea CLI installer is automatically integrated with the main Git repository setup script:

1. **Detection**: Checks for existing Tea CLI installations
2. **Offer Installation**: Prompts to install Tea CLI if none found
3. **Configuration**: Guides through login setup
4. **Repository Management**: Enables Gitea repository operations

## Security Features

- **Official Releases**: Downloads from official Gitea releases
- **Package Verification**: Uses official package repositories
- **Proper Permissions**: Sets appropriate file ownership and permissions

## Contributing

To add support for new distributions or architectures:

1. Update `detect_os()` function for new package managers
2. Add architecture detection in `get_arch()` function
3. Update installation methods in `install_tea_from_*()` functions
4. Test with target distribution
5. Update documentation

## License

This installer script follows the same license as Gitea Tea CLI (MIT).