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testsAndMisc-archive/C/imageViewer/LINTING.md
Krzysztof kuhy Rudnicki ee41f014b2 chore: optimize pre-commit, remove tracked binaries, fix lint issues 
- Move slow hooks (mypy, pylint, bandit, pytest, prettier) to pre-push stage
- Remove redundant autoflake (ruff covers F401/F841)
- Fix shellcheck OOM by batching files with xargs -n 40
- Remove tracked .o, .wav, .pyc binaries from git
- Move pomodoro wav files to ../testsAndMisc_binaries/ with symlinks
- Add *.o, *.so, *.a to .gitignore
- Refactor hltb._pick_best_hltb_entry to fix C901/PLR0911/SIM102
- Fix SC2034 warnings in gif_to_square.sh and upgrade.sh
- Add disk_cleanup_check.sh script
- Various test and code improvements across screen_locker,
  steam_backlog_enforcer, word_frequency, moviepy_showcase
2026-04-10 18:48:37 +02:00

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C Language Linter Setup for imageViewer Project

This directory contains a comprehensive linting setup for the imageViewer C project.

Tools Included

1. clang-tidy - Static Analysis

  • Configuration: .clang-tidy
  • Checks for bugs, performance issues, and style violations
  • Enforces modern C coding standards

2. clang-format - Code Formatting

  • Configuration: .clang-format
  • Automatically formats code to consistent style
  • 100-character line limit, 4-space indentation

3. cppcheck - Additional Static Analysis

  • Detects memory leaks, null pointer dereferences
  • Checks for undefined behavior

4. gcc with warnings - Compiler Analysis

  • Comprehensive warning flags
  • Standards compliance checking

Usage

Quick Start

# Install dependencies (Arch Linux)
make deps-arch

# Run all lint checks
make lint

# Format code
make format

# Run all checks
make check

# Check for memory leaks
make memcheck

Individual Commands

# Manual linting
./lint.sh

# Format specific file
clang-format -i main.c

# Run clang-tidy
clang-tidy main.c -- -I/usr/include/SDL2 -D_REENTRANT

# Run cppcheck
cppcheck --enable=all main.c

VS Code Integration

The .vscode/settings.json file provides:

  • Automatic formatting on save
  • C99 standard compliance
  • IntelliSense configuration for SDL2
  • Integrated linting with clang-tidy and cppcheck

Recommended Extensions for VS Code

  • C/C++ (Microsoft)
  • clang-tidy (mine-cetinkaya-fianso)
  • cppcheck (unixwrapped)

Linting Rules

Enabled Checks

  • clang-diagnostic-*: Compiler diagnostics
  • clang-analyzer-*: Static analysis
  • bugprone-*: Bug-prone patterns
  • cert-*: CERT secure coding standards
  • misc-*: Miscellaneous checks
  • performance-*: Performance improvements
  • portability-*: Cross-platform issues
  • readability-*: Code readability

Disabled Checks

  • readability-magic-numbers: Allows constants like window dimensions
  • cert-err33-c: Allows ignoring some function return values
  • misc-unused-parameters: Common in callback functions

Code Quality Workflow

  1. Write Code: Develop features in main.c
  2. Lint: Run make lint to check for issues
  3. Format: Run make format to fix formatting
  4. Build: Run make to compile
  5. Test: Run make test with sample images
  6. Memory Check: Run make memcheck for leak detection

Configuration Files

  • .clang-tidy: Static analysis rules
  • .clang-format: Code formatting style
  • .vscode/settings.json: VS Code integration
  • lint.sh: Comprehensive linting script
  • Makefile: Build and quality targets

Installation on Different Systems

Arch Linux

sudo pacman -S clang cppcheck valgrind

Ubuntu/Debian

sudo apt install clang-tidy cppcheck clang-format valgrind

Fedora/RHEL

sudo dnf install clang-tools-extra cppcheck clang valgrind

This setup ensures high code quality, consistency, and helps catch potential issues early in development.