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README.md
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README.md
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# cron-parser-cli
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# Cron Parser CLI
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A CLI tool that parses, validates, generates, and explains cron expressions in human-readable language
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A powerful and user-friendly CLI tool that parses, validates, generates, and explains cron expressions in human-readable language. Perfect for developers, DevOps engineers, and system administrators who work with scheduled tasks.
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## Features
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- **Parse & Validate**: Validate cron expressions and get detailed field breakdowns
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- **Natural Language**: Convert phrases like "every Monday at 9am" to cron syntax
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- **Next Execution**: See upcoming run times with visual timeline
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- **Interactive Generator**: Wizard-style cron expression builder
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- **Human-Readable**: Explain any cron expression in plain English
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- **Cross-Platform**: Works on Linux, macOS, and Windows
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## Installation
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### From PyPI (Recommended)
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```bash
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pip install cron-parser-cli
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```
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### From Source
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```bash
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git clone https://7000pct.gitea.bloupla.net/7000pctAUTO/cron-parser-cli.git
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cd cron-parser-cli
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pip install -e ".[dev]"
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```
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### Using pipx
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```bash
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pipx install cron-parser-cli
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```
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## Quick Start
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```bash
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# Show help
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cronparse --help
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# Parse a cron expression
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cronparse parse "0 9 * * *"
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# Convert natural language to cron
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cronparse from-text "every Monday at 9am"
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# See next execution times
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cronparse next "0 9 * * *"
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# Generate cron interactively
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cronparse generate
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# Explain cron in plain English
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cronparse explain "0 9 * * *"
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```
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## Commands
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### parse
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Validate and parse a cron expression, showing field breakdown.
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```bash
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cronparse parse "0 9 * * *"
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```
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Output:
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```
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Valid cron expression: 0 9 * * *
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minute : 0
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hour : 9
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day : *
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month : *
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day_of_week : *
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```
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### from-text
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Convert natural language phrases to cron expressions.
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```bash
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# Various examples
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cronparse from-text "every 5 minutes"
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cronparse from-text "daily at 9am"
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cronparse from-text "every Monday at 2:30pm"
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cronparse from-text "on the 1st of every month at midnight"
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```
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### next
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Show next execution times for a cron expression.
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```bash
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# Show next 5 executions with timeline
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cronparse next "0 9 * * *"
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# Show 10 executions without timeline
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cronparse next "0 9 * * *" --count 10 --no-timeline
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```
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### generate
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Interactive wizard to build cron expressions step by step.
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```bash
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cronparse generate
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```
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### explain
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Get human-readable description of a cron expression.
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```bash
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cronparse explain "0 9 * * *"
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# Output: At 09:00 AM, every day
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# Use 24-hour format
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cronparse explain "0 14 * * *" --24h
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# Output: At 14:00, every day
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```
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## Natural Language Patterns
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The tool supports various natural language patterns:
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| Pattern | Cron |
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|---------|------|
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| every 5 minutes | */5 * * * * |
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| every hour | 0 * * * * |
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| daily at 9am | 0 9 * * * |
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| daily at 2:30pm | 30 14 * * * |
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| every Monday at 9am | 0 9 * * 1 |
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| on the 1st of every month at midnight | 0 0 1 * * |
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| every 30 seconds (via cron workaround) | * * * * * |
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## Output Formats
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All commands support JSON output for scripting:
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```bash
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cronparse parse "0 9 * * *" --json
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cronparse next "0 9 * * *" --json
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cronparse explain "0 9 * * *" --json
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```
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## Cron Expression Format
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Standard cron format with 5 fields:
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```
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┌───────────── minute (0 - 59)
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│ ┌───────────── hour (0 - 23)
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│ │ ┌───────────── day of month (1 - 31)
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│ │ │ ┌───────────── month (1 - 12)
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│ │ │ │ ┌───────────── day of week (0 - 6) (Sunday = 0)
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│ │ │ │ │
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* * * * *
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```
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## Development
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### Setup
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```bash
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# Create virtual environment
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python -m venv venv
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source venv/bin/activate # Linux/macOS
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# or
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.\venv\Scripts\activate # Windows
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# Install dependencies
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pip install -e ".[dev]"
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# Run tests
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pytest tests/ -v
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# Run linter
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ruff check .
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```
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### Project Structure
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```
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cron-parser-cli/
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├── src/cronparse/
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│ ├── __init__.py # Package init
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│ ├── cli.py # Main CLI entry point
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│ ├── parser.py # Cron parsing & validation
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│ ├── nlp.py # Natural language conversion
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│ ├── scheduler.py # Next execution calculations
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│ ├── generator.py # Interactive wizard
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│ └── describer.py # Human-readable descriptions
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├── tests/
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│ ├── test_parser.py
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│ ├── test_nlp.py
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│ ├── test_scheduler.py
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│ ├── test_generator.py
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│ ├── test_cli.py
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│ └── test_describer.py
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├── pyproject.toml
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└── README.md
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```
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## Contributing
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Contributions are welcome! Please feel free to submit a Pull Request.
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## License
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This project is licensed under the MIT License - see the LICENSE file for details.
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