# .gitignore Templates for Common Programming Languages

## Universal .gitignore (Good for any project)
```gitignore
# Operating System Files
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes
ehthumbs.db
Thumbs.db

# Editor Files
.vscode/
.idea/
*.swp
*.swo
*~
.project
.classpath
.settings/

# Log Files
*.log
logs/
log/

# Environment Files
.env
.env.local
.env.development
.env.test
.env.production
.env.staging
*.secret
config.local.js

# Temporary Files
*.tmp
*.temp
temp/
tmp/
*.bak
*.backup

# Archive Files
*.zip
*.tar.gz
*.rar
*.7z

# System Files
desktop.ini
```

## Python Projects
```gitignore
# Universal files first (copy from above)

# Python-specific
__pycache__/
*.py[cod]
*$py.class
*.so
.Python
build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib/
lib64/
parts/
sdist/
var/
wheels/
share/python-wheels/
*.egg-info/
.installed.cfg
*.egg
MANIFEST

# PyInstaller
*.manifest
*.spec

# Installer logs
pip-log.txt
pip-delete-this-directory.txt

# Unit test / coverage reports
htmlcov/
.tox/
.nox/
.coverage
.coverage.*
.cache
nosetests.xml
coverage.xml
*.cover
*.py,cover
.hypothesis/
.pytest_cache/
cover/

# Jupyter Notebook
.ipynb_checkpoints

# IPython
profile_default/
ipython_config.py

# pyenv
.python-version

# Virtual environments
venv/
env/
ENV/
env.bak/
venv.bak/
.virtualenv

# Conda
.conda/

# Django
*.log
local_settings.py
db.sqlite3
db.sqlite3-journal

# Flask
instance/
.webassets-cache

# Scrapy
.scrapy

# Sphinx documentation
docs/_build/

# PyBuilder
.pybuilder/
target/

# Celery
celerybeat-schedule
celerybeat.pid

# SageMath parsed files
*.sage.py

# Spyder project settings
.spyderproject
.spyproject

# Rope project settings
.ropeproject
```

## JavaScript/Node.js Projects
```gitignore
# Universal files first (copy from above)

# Dependencies
node_modules/
npm-debug.log*
yarn-debug.log*
yarn-error.log*
lerna-debug.log*
.pnpm-debug.log*

# Runtime data
pids
*.pid
*.seed
*.pid.lock

# Coverage directory used by tools like istanbul
coverage/
*.lcov

# nyc test coverage
.nyc_output

# Grunt intermediate storage
.grunt

# Bower dependency directory
bower_components

# node-waf configuration
.lock-wscript

# Compiled binary addons
build/Release

# Dependency directories
jspm_packages/

# Snowpack dependency directory
web_modules/

# TypeScript cache
*.tsbuildinfo

# Optional npm cache directory
.npm

# Optional eslint cache
.eslintcache

# Optional stylelint cache
.stylelintcache

# Microbundle cache
.rpt2_cache/
.rts2_cache_cjs/
.rts2_cache_es/
.rts2_cache_umd/

# Optional REPL history
.node_repl_history

# Output of 'npm pack'
*.tgz

# Yarn Integrity file
.yarn-integrity

# parcel-bundler cache
.cache
.parcel-cache

# Next.js build output
.next
out

# Nuxt.js build / generate output
.nuxt
dist

# Gatsby files
.cache/
public

# Storybook build outputs
.out
.storybook-out

# Temporary folders
.tmp

# React
build/

# Vue.js
dist/

# Webpack
.webpack/

# Babel
.babel_cache/
```

## Java Projects
```gitignore
# Universal files first (copy from above)

# Compiled class file
*.class

# Log file
*.log

# BlueJ files
*.ctxt

# Mobile Tools for Java (J2ME)
.mtj.tmp/

# Package Files
*.jar
*.war
*.nar
*.ear
*.zip
*.tar.gz
*.rar

# virtual machine crash logs
hs_err_pid*

# Maven
target/
pom.xml.tag
pom.xml.releaseBackup
pom.xml.versionsBackup
pom.xml.next
release.properties
dependency-reduced-pom.xml
buildNumber.properties
.mvn/timing.properties
.mvn/wrapper/maven-wrapper.jar

# Gradle
.gradle
build/
!gradle/wrapper/gradle-wrapper.jar
!**/src/main/**/build/
!**/src/test/**/build/

# IntelliJ IDEA
.idea/
*.iws
*.iml
*.ipr
out/
!**/src/main/**/out/
!**/src/test/**/out/

# Eclipse
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
bin/
!**/src/main/**/bin/
!**/src/test/**/bin/

# NetBeans
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/

# VS Code
.vscode/

# Spring Boot
spring-boot-*.log
```

## C/C++ Projects
```gitignore
# Universal files first (copy from above)

# Prerequisites
*.d

# Object files
*.o
*.ko
*.obj
*.elf

# Linker output
*.ilk
*.map
*.exp

# Precompiled Headers
*.gch
*.pch

# Libraries
*.lib
*.a
*.la
*.lo
*.dll
*.so
*.so.*
*.dylib

# Executables
*.exe
*.out
*.app
*.i*86
*.x86_64
*.hex

# Debug files
*.dSYM/
*.su
*.idb
*.pdb

# Kernel Module Compile Results
*.mod*
*.cmd
.tmp_versions/
modules.order
Module.symvers
Mkfile.old
dkms.conf

# CMake
CMakeLists.txt.user
CMakeCache.txt
CMakeFiles
CMakeScripts
Testing
Makefile
cmake_install.cmake
install_manifest.txt
compile_commands.json
CTestTestfile.cmake
_deps

# Build directories
build/
debug/
release/
```

## Go Projects
```gitignore
# Universal files first (copy from above)

# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib

# Test binary, built with `go test -c`
*.test

# Output of the go coverage tool
*.out

# Dependency directories
vendor/

# Go workspace file
go.work
go.work.sum

# Build output
bin/
pkg/
dist/

# Air (live reload)
tmp/

# GoLand
.idea/

# VS Code Go extension
.vscode/
```

## Web Development (HTML/CSS/JS)
```gitignore
# Universal files first (copy from above)

# Sass
.sass-cache/
*.css.map
*.sass.map
*.scss.map

# Less
*.css.map

# Bundle files
bundle.js
bundle.css

# Compiled CSS from preprocessors
*.compiled.css

# npm/yarn
node_modules/
package-lock.json
yarn.lock

# Webpack
dist/
.webpack/

# Parcel
.cache/
.parcel-cache/

# Build tools
.grunt/
.gulp/

# Static site generators
_site/
.jekyll-cache/
.jekyll-metadata

# PWA
sw.js
workbox-*.js
```

## Docker Projects
```gitignore
# Universal files first (copy from above)

# Docker
.dockerignore
docker-compose.override.yml
.docker/

# Container runtime files
*.pid
*.log

# Docker volumes
data/
volumes/
```

## Recommended Usage Instructions

1. **Start with Universal**: Always begin with the universal .gitignore section
2. **Add Language-Specific**: Append the appropriate language-specific section
3. **Customize for Your Project**: Add any project-specific files or directories
4. **Keep It Updated**: Review and update your .gitignore as your project evolves

## Creating .gitignore Files

### Method 1: Manual Creation
```bash
# Navigate to your project root
cd your-project

# Create .gitignore file
touch .gitignore

# Edit with your preferred editor
nano .gitignore  # or code .gitignore for VS Code
```

### Method 2: Use gitignore.io
Visit https://gitignore.io and generate custom .gitignore files for your stack.

### Method 3: GitHub Templates
When creating a repository in Gitea, you can initialize with a .gitignore template for common languages.

## Tips for .gitignore Management

1. **Add .gitignore early**: Create it before your first commit
2. **Test your patterns**: Use `git status` to verify files are being ignored
3. **Use comments**: Document why certain patterns are included
4. **Be specific**: Avoid overly broad patterns that might exclude needed files
5. **Global gitignore**: Consider setting up a global .gitignore for OS-specific files

### Setting up Global .gitignore
```bash
# Create global gitignore file
git config --global core.excludesfile ~/.gitignore_global

# Add common files to global ignore
echo ".DS_Store" >> ~/.gitignore_global
echo "Thumbs.db" >> ~/.gitignore_global
echo "*.log" >> ~/.gitignore_global
```