legacylens-cobol-parser 0.1.0

A tool to extract information from COBOL programs

LegacyLens COBOL Parser

A Python tool to extract specific information from COBOL programs.

Features

This parser extracts the following information from COBOL source code:

• CALLS: Identifies CALL statements and their parameters
• I/O FILES: Extracts file operations (SELECT, OPEN, CLOSE, READ, WRITE)
• PERFORMS: Identifies PERFORM statements (procedural calls)
• SQL QUERIES: Extracts embedded SQL statements
• COPYBOOKS: Identifies COPY statements (included files)
• Support for conditional compilation
• Configurable logging with standard levels (INFO, DEBUG)

Installation

From PyPI (Recommended)

pip install legacylens_cobol_parser

From Source

# Clone the repository
git clone https://github.com/sam94dion/cobol-parser.git
cd cobol-parser

# Install in development mode
pip install -e .

Usage

Quick Start (Simplified Interface)

# Parse a file with default settings
from cobol_parser import parse_file

# Parse a file and extract everything
result = parse_file("path/to/your/cobol/program.cbl")
print(result)

# Parse a file and extract only specific information
result = parse_file(
    "path/to/your/cobol/program.cbl", 
    extract_types=["calls", "sql_queries"]
)
print(result)

# Parse from a string
from cobol_parser import parse_string

cobol_code = """
       IDENTIFICATION DIVISION.
       PROGRAM-ID. EXAMPLE.
       PROCEDURE DIVISION.
           PERFORM PARA-A.
           CALL "SUBPGM" USING WS-VAR.
       PARA-A.
           DISPLAY "Hello, World!".
"""
result = parse_string(cobol_code)
print(result)

As a Python Library (Advanced Usage)

from cobol_parser import CobolParser, setup_logger
import logging

# Configure logging (optional)
setup_logger(level=logging.INFO)  # Options: logging.INFO, logging.DEBUG

# Create a parser instance
parser = CobolParser()

# Load COBOL source from a file
parser.load_from_file("path/to/your/cobol/program.cbl")

# Or load from a string
cobol_code = """
       IDENTIFICATION DIVISION.
       PROGRAM-ID. EXAMPLE.
       PROCEDURE DIVISION.
           PERFORM PARA-A.
           CALL "SUBPGM" USING WS-VAR.
       PARA-A.
           DISPLAY "Hello, World!".
"""
parser.load_from_string(cobol_code)

# Extract all information
result = parser.extract_all()
print(result)

# Or extract specific information
calls = parser.extract_calls()
io_files = parser.extract_io_files()
performs = parser.extract_performs()
sql_queries = parser.extract_sql_queries()
copybooks = parser.extract_copybooks()

Logging Configuration

The parser provides a flexible logging system:

from cobol_parser import setup_logger
import logging

# Configure logging with different levels
setup_logger(level=logging.INFO)    # Show only important information
setup_logger(level=logging.DEBUG)   # Show all debugging information

# You can also configure logging with a custom name
setup_logger(name="my_custom_logger", level=logging.INFO)

# The logger will output messages in the format:
# YYYY-MM-DD HH:MM:SS,mmm - logger_name - LEVEL - message

Command Line Interface

# Basic usage
legacylens_cobol_parser path/to/your/cobol/program.cbl

# Specify output file
legacylens_cobol_parser path/to/your/cobol/program.cbl -o results.json

# Extract specific information
legacylens_cobol_parser path/to/your/cobol/program.cbl -e calls

# Output as text instead of JSON
legacylens_cobol_parser path/to/your/cobol/program.cbl -f text

# Set log level
legacylens_cobol_parser path/to/your/cobol/program.cbl -l info    # Show only INFO messages
legacylens_cobol_parser path/to/your/cobol/program.cbl -l debug   # Show all debug messages

Development

Running Tests

# Install development dependencies
pip install -e ".[dev]"

# Run tests
pytest

Extending the Parser

The parser is designed to be extensible. To add support for extracting additional elements:

1. Create a new extractor in the cobol_parser/extractors/ directory
2. Add a corresponding method to the CobolParser class
3. Update the CLI interface in cobol_parser/cli.py

License

This project is licensed under the MIT License - see the LICENSE file for details.