# Ruff Status - Updated 2025-11-09

## 🎉 Summary

**Previous state:** 21,348 violations
**Current state:** 14,185 violations
**Fixed:** 7,163 violations (33.5% reduction!)

---

## ✅ What's Been Fixed

Based on recent commits:

### 1. **UTF-8 Encoding Declarations** (268 violations) ✅ FIXED
- Commit: `c8bc1b43` - Remove unnecessary UTF-8 encoding declarations
- All `# encoding: utf-8` lines removed
- Files without shebang now have proper blank line spacing

### 2. **Lambda Closure Bugs (B023)** (63 violations) ✅ FIXED
- Commit: `8a67d219` - Fix B023 violations: bind loop variables in lambda functions
- Loop variables now properly captured in lambda default arguments
- **Critical bug fixed** - logging will now show correct values

### 3. **Mutable Default Arguments (B006)** (6 violations) ✅ FIXED
- Commit: `659dfc10` - Replace mutable default arguments with immutable tuples
- Note: Some mutable defaults were intentional patterns and may have been handled differently

### 4. **Quote Style (Q000)** (~12,835 violations) ✅ MOSTLY FIXED
- Commit: `9cbb3569` - Configure ruff linter to enforce single quotes for inline strings
- **Remaining:** 181 violations (down from ~13,016)
- Configuration now enforces single quotes consistently

---

## 📊 Current Violation Breakdown (14,185 total)

### 🔴 Type Annotations (5,200+)
- **ANN001** (3,023) - Missing type hints on function arguments
- **ANN201** (1,082) - Missing return type annotations
- **ANN204** (784) - Missing return types on special methods
- **ANN202** (331) - Missing return types on private functions
- **ANN206** (247) - Missing return types on class methods
- **ANN205** (92) - Missing return types on static methods

### 📝 Documentation (2,400+)
- **D102** (1,019) - Undocumented public methods
- **D105** (520) - Undocumented magic methods
- **D101** (405) - Undocumented public classes
- **D103** (354) - Undocumented public functions
- **D107** (233) - Undocumented `__init__` methods
- **D212** (293) - Multi-line summary formatting [auto-fixable]
- **D400** (317) - Missing trailing period in docstrings
- **D415** (317) - Missing terminal punctuation in docstrings

### 🟡 Code Quality & Modernization (1,500+)
- **UP031** (640) - Printf-style string formatting (use f-strings)
- **I001** (256) - Unsorted imports [auto-fixable]
- **RUF012** (221) - Mutable class defaults
- **ERA001** (200) - Commented-out code
- **UP004** (190) - Useless object inheritance [auto-fixable]
- **Q000** (181) - Quote style violations [auto-fixable]
- **ARG002** (178) - Unused method arguments
- **PLR2004** (176) - Magic value comparisons

### 🟠 Exception Handling (420+)
- **TRY003** (313) - Raise with string messages
- **B904** (62) - Missing exception chaining (`from err`)
- **TRY002** (48) - Raise vanilla class

### ⚪ Style & Complexity (800+)
- **COM812** (140) - Missing trailing comma [auto-fixable]
- **E501** (122) - Line too long (>120 chars)
- **EM101** (229) - Raw strings in exceptions
- **EM102** (87) - F-strings in exceptions
- **C901** (60) - Complex structure (high cyclomatic complexity)
- **PLR0913** (45) - Too many arguments (>5)
- **PLR0912** (40) - Too many branches (>12)

### 🔧 Remaining Critical Issues
- **T100** (10) - Debugger statements (`pdb.set_trace()`)
- **B904** (62) - Missing exception chaining
- **G004** (8) - F-strings in logging (prevents lazy evaluation)

---

## 🎯 Next Steps (Priority Order)

### Phase 1: Critical Issues
1. **T100** (10) - Remove debugger statements - **MUST FIX**
2. **B904** (62) - Add exception chaining for better debugging
3. **Q000** (181) - Fix remaining quote violations [auto-fixable]

### Phase 2: Auto-fixable Improvements
4. **I001** (256) - Sort imports [auto-fixable]
5. **UP004** (190) - Remove useless object inheritance [auto-fixable]
6. **COM812** (140) - Add trailing commas [auto-fixable]
7. **D212** (293) - Fix docstring formatting [auto-fixable]
8. **UP024** (48) - Fix OS error aliases [auto-fixable]
9. **RET505** (29) - Remove superfluous else after return [auto-fixable]

### Phase 3: Code Quality (Manual)
10. **ERA001** (200) - Remove commented-out code
11. **UP031** (640) - Modernize to f-strings
12. **PLR2004** (176) - Replace magic values with constants
13. **ARG002** (178) - Review unused method arguments

### Phase 4: Optional/Nice-to-Have
14. **ANN*** (5,200+) - Add type annotations
15. **D*** (2,400+) - Add docstrings
16. **PTH*** - Migrate to pathlib

---

## 📈 Progress Metrics

| Category | Before | After | Reduction |
|----------|--------|-------|-----------|
| **Total Violations** | 21,348 | 14,185 | -7,163 (33.5%) |
| **Critical Bugs (B023, B006)** | 69 | 0 | -69 (100%) ✅ |
| **UTF-8 Declarations** | 268 | 0 | -268 (100%) ✅ |
| **Quote Style** | 13,016 | 181 | -12,835 (98.6%) ✅ |
| **Auto-fixable** | ~8,400 | ~1,295 | -7,105 (84.6%) |

---

## 🔍 Ruff Configuration

Current `pyproject.toml` settings:

```toml
[tool.ruff]
line-length = 120
exclude = ["dev", "lib/exabgp/vendoring", "build", "site-packages", "src/exabgp/vendoring"]

[tool.ruff.lint]
select = ["E9", "F63", "F7", "F82"]  # Critical errors only

[tool.ruff.lint.flake8-quotes]
inline-quotes = "single"
docstring-quotes = "double"

[tool.ruff.format]
quote-style = "single"
indent-style = "space"
docstring-code-format = true
```

---

## 🛠️ Quick Fixes Available

### Fix remaining quote violations:
```bash
ruff check src/ --select Q000 --fix
```

### Sort imports:
```bash
ruff check src/ --select I001 --fix
```

### Remove useless object inheritance:
```bash
ruff check src/ --select UP004 --fix
```

### Add trailing commas:
```bash
ruff check src/ --select COM812 --fix
```

### Multiple fixes at once:
```bash
ruff check src/ --select Q000,I001,UP004,COM812,D212,UP024,RET505 --fix
```

---

**Last Updated:** 2025-11-09 after commits up to `8a67d219`
