오픈소스 기여 완전 가이드

set -e
mkdir -p /tmp/oss-demo && cd /tmp/oss-demo

# Step 1: Simulate the "upstream" project
rm -rf upstream my-fork
mkdir upstream && cd upstream
git init -q --initial-branch=main
git config user.email "[email protected]"
git config user.name "Project Maintainer"
echo "# Demo Project" > README.md
echo "This project does cool things." >> README.md
git add README.md
git commit -q -m "Initial commit"
cd ..

# Step 2: Simulate fork by cloning locally
git clone -q upstream my-fork
cd my-fork
git config user.email "[email protected]"
git config user.name "New Contributor"

git remote add upstream ../upstream

echo "--- Remotes configured ---"
git remote -v

# Step 3: Create a feature branch
git checkout -q -b fix/readme-typo

# Step 4: Make a focused change
sed -i 's/cool things/genuinely useful things/' README.md
git add README.md
git commit -q -m "docs: clarify project description in README"

echo "--- Feature branch created with one focused commit ---"
git log --oneline

# Step 5: Upstream changed while you worked
cd ../upstream
echo "" >> README.md
echo "## Installation" >> README.md
echo "Run \`npm install\` to get started." >> README.md
git add README.md
git commit -q -m "docs: add installation section"
cd ../my-fork

# Step 6: Sync your fork
git fetch upstream
git checkout -q main
git merge upstream/main --no-edit -q

echo "main branch is now current with upstream:"
git log --oneline

# Step 7: Confirm feature branch untouched
git checkout -q fix/readme-typo

echo "--- Feature branch, still isolated and ready to push ---"
cat README.md

# Step 8: Push branch to your fork
git push -q origin fix/readme-typo
echo "Branch pushed. On real GitHub, you'd now click 'Compare & pull request'."