🐠 Liquibase Fish Completion

A comprehensive shell completion script for Liquibase database migration tool in Fish shell, enhancing developer productivity with intelligent autocompletion and inline documentation.

🚀 Features

• Complete Command Coverage: All Liquibase commands with descriptions
• Argument Autocompletion: Full parameter completion with help text
• Official Documentation: Each command and argument shows official documentation
• Fast & Lightweight: Minimal performance impact on shell startup
• Easy Installation: Simple file placement for immediate use

📦 Installation

# Place the completion file in Fish completions directory
cp liquibase.fish ~/.config/fish/completions/

That's it! Fish will automatically load the completions on next shell start.

🎯 Supported Commands

Core Migration Commands

• update / update-sql / update-count / update-count-sql
• rollback / rollback-sql / rollback-count / rollback-count-sql
• rollback-to-date / rollback-to-date-sql

Change Management

• generate-changelog / changelog-sync / changelog-sync-sql
• diff / diff-changelog
• mark-next-changeset-ran / mark-next-changeset-ran-sql

Database State

• status / history / validate
• snapshot / snapshot-reference
• calculate-checksum / clear-checksums

Utility Commands

• init / db-doc / tag / tag-exists
• list-locks / release-locks
• execute-sql / drop-all

Quality & Checks

• checks / unexpected-changesets
• Liquibase Hub integration commands

💡 Usage Examples

Basic Command Completion

liquibase up<TAB>
# Shows: update, update-sql, update-count, update-count-sql, etc.

Parameter Completion with Documentation

liquibase update --<TAB>
# Shows all available parameters:
# --changelog-file    The root changelog
# --url              The JDBC database connection URL  
# --username         The database username
# --password         The database password
# --contexts         Contexts to execute

Smart Context-Aware Completion

The completion script understands command context and only shows relevant parameters for each specific command.

🛠️ Technical Implementation

• Fish Shell Scripting: Uses Fish's advanced completion framework
• Context-Aware Logic: Intelligent parameter suggestions based on current command
• Documentation Integration: Each completion includes official Liquibase documentation
• Performance Optimized: Efficient completion generation with minimal overhead

🔧 Development & Contribution

Adding New Commands

1. Add command to the liquibase_commands list
2. Create completion entry with description
3. Define command-specific parameters
4. Test completion behavior

Example Command Addition

# Add to command list
set -l liquibase_commands ... NEW_COMMAND

# Add completion entry
complete -f -c liquibase -n "not __fish_seen_subcommand_from $liquibase_commands" \
    -a NEW_COMMAND -d 'Command description'

# Add parameters
complete -f -c liquibase -n "__fish_seen_subcommand_from NEW_COMMAND" \
    -a --parameter -d 'Parameter description'

📊 Impact & Benefits

• Developer Productivity: Eliminates need to memorize complex Liquibase syntax
• Error Reduction: Prevents typos in command names and parameters
• Learning Aid: Inline documentation helps users discover new features
• Workflow Integration: Seamless integration with Fish shell workflow

🎥 Demo

The completion provides instant feedback with:

• Command suggestions as you type
• Parameter autocompletion with descriptions
• Context-sensitive help for each Liquibase operation

🔄 Maintenance

• Version Compatibility: Tested with Liquibase 4.15.0+
• Regular Updates: Maintained to include new Liquibase commands
• Community Driven: Open to contributions and feature requests

Essential tool for DevOps engineers and database administrators working with Liquibase in Fish shell environments.