commands.sh

#!/usr/bin/env bash
# Lab 25 - Dependency Policy and Safe Upgrades
# Commands executed during the lab


# Install Required Tools

sudo apt update

sudo apt install -y python3 python3-pip python3-venv git nodejs npm


# Verify Installations

python3 --version

pip3 --version

node --version

npm --version

git --version


# Step 1: Create Project Structure

mkdir -p ~/dependency-lab
cd ~/dependency-lab
mkdir python-app
cd python-app
python3 -m venv venv
source venv/bin/activate
touch requirements.txt requirements-dev.txt
ls -la


# Create a dependency policy file

nano ~/dependency-lab/python-app/dependency-policy.yaml


# Dependency Upgrade Policy Configuration

ls -l dependency-policy.yaml


# Create the sample Python application

nano ~/dependency-lab/python-app/app.py

python3 -m py_compile app.py
echo $?


# Create requirements.txt with pinned versions

nano ~/dependency-lab/python-app/requirements.txt


# Install dependencies

cd ~/dependency-lab/python-app
source venv/bin/activate
python3 -m pip install --upgrade pip

python3 -m pip install -r requirements-dev.txt

python3 -m pip list | head -20


# Step 5: Create Dependency Scanning Script

nano ~/dependency-lab/python-app/check_dependencies.py

chmod +x ~/dependency-lab/python-app/check_dependencies.py
ls -l check_dependencies.py


# Basic syntax check

python3 -m py_compile check_dependencies.py
echo $?


# Run the dependency checker

cd ~/dependency-lab/python-app
source venv/bin/activate
python3 check_dependencies.py


# Check for outdated packages

python3 -m pip list --outdated


# Create the test directory

cd ~/dependency-lab/python-app
mkdir -p tests
ls -ld tests


# Create the sample test file

nano ~/dependency-lab/python-app/tests/test_app.py


# Quick syntax verification

python3 -m py_compile tests/test_app.py
echo $?


# Step 2: Create Upgrade Testing Script

nano ~/dependency-lab/python-app/test_upgrade.sh


# Execute workflow

chmod +x ~/dependency-lab/python-app/test_upgrade.sh
ls -l test_upgrade.sh


# Shell syntax verification

bash -n test_upgrade.sh
echo $?


# Step 3: Create Automated Upgrade Workflow

nano ~/dependency-lab/python-app/upgrade_workflow.py

chmod +x ~/dependency-lab/python-app/upgrade_workflow.py
ls -l upgrade_workflow.py


# Basic syntax verification

python3 -m py_compile upgrade_workflow.py
echo $?


# Run basic tests

cd ~/dependency-lab/python-app
source venv/bin/activate
pytest tests/ -v


# Run security checks

python3 check_dependencies.py


# Test upgrade script (dry run)

./test_upgrade.sh


# Test actual upgrade for one package

./test_upgrade.sh requests


# Run workflow initializer

python3 upgrade_workflow.py


# Create the Node.js project for comparison

cd ~/dependency-lab
mkdir -p nodejs-app
cd nodejs-app
npm init -y


# Create package.json with dependencies

nano ~/dependency-lab/nodejs-app/package.json


# Install dependencies

cd ~/dependency-lab/nodejs-app
npm install


# Run security audit

npm audit


# Check for outdated packages

npm outdated


# Step 6: Create Comparison Report

nano ~/dependency-lab/generate_report.sh


# Generate dependency management report

chmod +x ~/dependency-lab/generate_report.sh
cd ~/dependency-lab
./generate_report.sh

sed -n '1,120p' report.md


# Installed Packages

sed -n '121,220p' report.md


# Verify Task 1: Policy Definition

cd ~/dependency-lab/python-app
source venv/bin/activate
test -f dependency-policy.yaml && echo "✓ Policy file created"

safety --version && echo "✓ Safety installed"

pip-audit --version && echo "✓ Pip-audit installed"

python3 check_dependencies.py


# Verify Task 2: Testing Framework

test -d tests && echo "✓ Test directory created"

pytest tests/ -v --tb=short

test -x test_upgrade.sh && echo "✓ Upgrade script executable"

cd ~/dependency-lab
test -f report.md && echo "✓ Report generated"

cat report.md


# Issue: Safety or pip-audit not found

source ~/dependency-lab/python-app/venv/bin/activate
cd ~/dependency-lab/python-app
python3 -m pip install -r requirements-dev.txt


# Issue: Tests fail to import app module

cd ~/dependency-lab/python-app
pytest tests/ -v


# Issue: npm audit shows vulnerabilities

cd ~/dependency-lab/nodejs-app
npm audit fix


# Issue: Permission denied on scripts

chmod +x ~/dependency-lab/python-app/test_upgrade.sh
chmod +x ~/dependency-lab/python-app/upgrade_workflow.py
chmod +x ~/dependency-lab/python-app/check_dependencies.py
chmod +x ~/dependency-lab/generate_report.sh

ls -l ~/dependency-lab/python-app/test_upgrade.sh ~/dependency-lab/python-app/upgrade_workflow.py ~/dependency-lab/python-app/check_dependencies.py ~/dependency-lab/generate_report.sh