Create comprehensive COBOL dependency reference document for CallingExample

[Copilot]

This PR creates a comprehensive dependency analysis and reference document for the AS400 COBOL calling examples in /AS400/COBOL_examples/CallingExample/QCBLLESRC/.

What was added

Created DEPENDENCY_REFERENCE.md that provides:

📊 Program Inventory & Dependencies

• Analysis of 4 COBOL programs (CALLER.CBLLE, CALLER2.CBLLE, HERON.CBLLE, NESTEDCALL.CBLLE)
• Mermaid diagram visualizing call dependencies
• Clear documentation of external vs nested program calls

🔄 Data Flow Analysis

• Comprehensive mapping of parameter flow between programs
• Common data structure patterns using AS400 PACKED-DECIMAL types
• Triangle calculation algorithm documentation (Heron's formula implementation)

🏗️ Dependency Structure

graph TB
    A[CALLER.CBLLE] -->|CALL PROGRAM| B[HERON.CBLLE]
    C[CALLER2.CBLLE] -->|CALL PROGRAM| D[HERON.CBLLE]
    E[NESTEDCALL.CBLLE] -->|Nested CALL| F[HERON Nested Program]

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🔍 Key Findings

• No circular dependencies - Clean unidirectional call structure
• No copybook dependencies - All data structures defined locally
• Legacy AS400 patterns - Proper use of PACKED-DECIMAL and LINKAGE SECTION
• Code quality issues identified - Undefined variable references in CALLER programs

💡 Modularity Recommendations

• Code deduplication opportunities (CALLER.CBLLE and CALLER2.CBLLE are identical)
• Enhanced error handling patterns
• Proposed copybook structure for shared data definitions
• Standardized naming conventions
• Improved program structure templates

Technical Details

The analysis covers:

1. Data flow dependencies between programs
2. Potential circular dependencies (none found)
3. Modularity recommendations for maintainability
4. Legacy patterns affecting dependencies and modernization considerations

This reference document will serve as a foundation for understanding the codebase structure and planning any future modernization efforts.

Fixes #1.

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[raykao]

@copilot ok this looked good - are there any other best practices we could have added to this to make it better? can we add an additional feature to stream line this?

[Copilot]

@copilot ok this looked good - are there any other best practices we could have added to this to make it better? can we add an additional feature to stream line this?

I've enhanced the dependency reference with comprehensive automation tools and best practices! The key additions include:

🔧 Automation Tools:

• PowerShell dependency scanner with multiple output formats (JSON, CSV, Markdown)
• Bash variable validator that detects undefined references and code quality issues
• Standardized COBOL program template following AS400 best practices
• Complete build/deployment automation guide

🚀 Streamlining Features:

• Automated code validation scripts (found the PLOCHA-DISPLAYED issues)
• CI/CD pipeline integration examples
• Pre-commit hooks for quality gates
• Template-based development to reduce errors

📊 Enhanced Analysis:

• Performance optimization guidelines
• Security best practices for COBOL
• Testing framework templates
• Migration roadmap with phased approach

The tools are immediately usable - run ./tools/validate-variables.sh *.CBLLE to validate code or .\tools\dependency-scanner.ps1 to generate reports. This transforms the static reference into a complete development toolkit.

Commit: c9e69f2