Shell Scripting: Automate Your Development Workflow

# Instead of running 10 commands manually
git pull origin main
npm install
npm run build
npm test
# ...

# Create script
./scripts/deploy.sh

# One command!

#!/bin/bash

# Variables
NAME="World"
echo "Hello $NAME!"

# Arguments
echo "First arg: $1"
echo "All args: $@"

# Environment variables
export NODE_ENV=production

if [ "$NODE_ENV" = "production" ]; then
  echo "Production mode"
elif [ "$NODE_ENV" = "development" ]; then
  echo "Development mode"
else
  echo "Unknown mode"
fi

# For loop
for file in *.js; do
  echo "Processing $file"
done

# While loop
while read line; do
  echo "$line"
done < input.txt

deploy() {
  local env=$1
  echo "Deploying to $env"
  # deployment logic
}

# Call function
deploy production

set -e  # Exit on error
set -u  # Exit on undefined variable
set -o pipefail  # Exit on pipe error

trap 'echo "Error on line $LINENO"' ERR

#!/bin/bash
# scripts/setup.sh

echo "Setting up project..."

# Install dependencies
npm install

# Copy env file
cp .env.example .env

# Setup database
npm run db:migrate

echo "Setup complete!"

#!/bin/bash
# scripts/deploy.sh

ENV=${1:-staging}

echo "Deploying to $ENV"

# Run tests
npm test

# Build
npm run build

# Deploy
if [ "$ENV" = "production" ]; then
  npm run deploy:prod
else
  npm run deploy:staging
fi