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How to Detect Circular Dependencies

Find cycles in directed graphs like dependency trees, build systems, or module imports.

Quick Answer​

# Find strongly connected components (cycles)
grph components graph.gexf --type strongly --list

Any strongly connected component with more than one node indicates a cycle.

Understanding the Output​

grph components dependencies.gexf --type strongly

# Output:
# Strongly Connected Components
# ┃ Statistic       ┃ Value ┃
# ├─────────────────┼───────┤
# │ Total           │ 35    │
# │ Largest         │ 3     │  ← A cycle of 3 nodes!

If "Largest" is greater than 1, you have circular dependencies.

Find the Actual Cycles​

List all components to find which nodes are in cycles:

grph components dependencies.gexf --type strongly --list

Look for components with multiple nodes - these are your cycles.

Example: Finding Dependency Cycles​

# Check if module A and B have a cycle
grph has-path deps.gexf A B
grph has-path deps.gexf B A

# If both return Yes, you have a cycle

Why Cycles Matter​

  • Build systems: Cycles prevent proper build ordering
  • Module imports: Cycles can cause import errors
  • Dependencies: Cycles create version resolution issues
  • Analyze Impact - Understand dependency effects
  • grph components --help - Full command documentation