import-mend 0.1.1

Detect and repair broken Python imports after refactoring, with zero runtime cost

import-mend

Detect and repair broken Python imports after refactoring — with zero runtime cost.

What it does

After a codebase refactoring (manual or autonomous), module paths shift. Every file that imported moved symbols now references a path that no longer exists. import-mend fixes this retroactively:

1. Inventories symbols before and after using git history + AST (no code executed)
2. Detects moves, renames, splits, and merges in the migration map
3. Rewrites all broken imports in-place using libcst (format-preserving)
4. Verifies every import via filesystem + AST checks (zero runtime loading)

Installation

pip install import-mend

Usage

# Full pipeline: fix then verify
python -m import_mend run

# Fix broken imports only
python -m import_mend fix

# Verify imports only (CI gate)
python -m import_mend check

# With options
python -m import_mend run \
  --source-dirs src lib \
  --git-ref HEAD~3 \
  --format json \
  --log-level DEBUG

Programmatic API

from import_mend import fix, check, run

# Full pipeline
result = run(root="/path/to/project", source_dirs=["src"], git_ref="HEAD~1")

# Fix only
fix_results = fix(root=".", git_ref="abc123")

# Check only
errors = check(root=".", encapsulation_check=True)

Configuration

Add to pyproject.toml:

[tool.import_mend]
source_dirs = ["src", "lib"]
exclude_patterns = [".venv", "__pycache__", "node_modules"]
git_ref = "HEAD"
encapsulation_check = true
output_format = "human"   # or "json"
log_level = "INFO"        # or "DEBUG", "ERROR"
check_stubs = true        # .pyi stub fallback
check_getattr = true      # __getattr__ suppression

Design

• Deterministic-first: AST-based analysis handles the common case. LLM integration for residuals is out of scope — the structured error list is the handoff contract.
• Zero runtime cost: The checker never loads a module. Safe in any environment.
• Generic: Works on any Python project with git. No project-specific config required.
• Single dependency: Only libcst beyond the standard library.

License

MIT