feat: split out reset from the revert. First the safe path then the advanced path
This commit is contained in:
Bjarke Sporring
373
01_essentials/05-revert/setup.ps1
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373
01_essentials/05-revert/setup.ps1
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#!/usr/bin/env pwsh
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<#
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.SYNOPSIS
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Sets up the Module 05 challenge environment for learning git revert.
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.DESCRIPTION
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This script creates a challenge directory with three branches demonstrating
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different revert scenarios:
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- regular-revert: Basic revert of a single bad commit
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- merge-revert: Reverting a merge commit with -m flag
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- multi-revert: Reverting multiple commits at once
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#>
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Write-Host "`n=== Setting up Module 05: Git Revert Challenge ===" -ForegroundColor Cyan
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# Remove existing challenge directory if it exists
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if (Test-Path "challenge") {
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Write-Host "Removing existing challenge directory..." -ForegroundColor Yellow
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Remove-Item -Recurse -Force "challenge"
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}
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# Create fresh challenge directory
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Write-Host "Creating challenge directory..." -ForegroundColor Green
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New-Item -ItemType Directory -Path "challenge" | Out-Null
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Set-Location "challenge"
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# Initialize Git repository
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Write-Host "Initializing Git repository..." -ForegroundColor Green
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git init | Out-Null
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# Configure git for this repository
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git config user.name "Workshop Student"
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git config user.email "student@example.com"
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# ============================================================================
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# SCENARIO 1: Regular Revert (Basic)
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# ============================================================================
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Write-Host "`nScenario 1: Creating regular-revert branch..." -ForegroundColor Cyan
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# Initial commit
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$calcContent = @"
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# calculator.py - Simple calculator
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def add(a, b):
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"""Add two numbers."""
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return a + b
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def subtract(a, b):
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"""Subtract b from a."""
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return a - b
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"@
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Set-Content -Path "calculator.py" -Value $calcContent
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git add .
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git commit -m "Initial calculator implementation" | Out-Null
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# Create regular-revert branch
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git switch -c regular-revert | Out-Null
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# Good commit: Add multiply
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$calcContent = @"
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# calculator.py - Simple calculator
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def add(a, b):
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"""Add two numbers."""
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return a + b
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def subtract(a, b):
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"""Subtract b from a."""
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return a - b
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def multiply(a, b):
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"""Multiply two numbers."""
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return a * b
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"@
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Set-Content -Path "calculator.py" -Value $calcContent
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git add .
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git commit -m "Add multiply function" | Out-Null
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# BAD commit: Add broken divide function
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$calcContent = @"
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# calculator.py - Simple calculator
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def add(a, b):
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"""Add two numbers."""
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return a + b
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def subtract(a, b):
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"""Subtract b from a."""
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return a - b
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def multiply(a, b):
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"""Multiply two numbers."""
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return a * b
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def divide(a, b):
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"""Divide a by b - BROKEN: doesn't handle division by zero!"""
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return a / b # This will crash if b is 0!
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"@
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Set-Content -Path "calculator.py" -Value $calcContent
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git add .
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git commit -m "Add broken divide function - needs to be reverted!" | Out-Null
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# Good commit: Add modulo (after bad commit)
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$calcContent = @"
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# calculator.py - Simple calculator
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def add(a, b):
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"""Add two numbers."""
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return a + b
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def subtract(a, b):
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"""Subtract b from a."""
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return a - b
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def multiply(a, b):
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"""Multiply two numbers."""
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return a * b
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def divide(a, b):
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"""Divide a by b - BROKEN: doesn't handle division by zero!"""
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return a / b # This will crash if b is 0!
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def modulo(a, b):
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"""Return remainder of a divided by b."""
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return a % b
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"@
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Set-Content -Path "calculator.py" -Value $calcContent
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git add .
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git commit -m "Add modulo function" | Out-Null
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Write-Host "[CREATED] regular-revert branch with bad divide commit" -ForegroundColor Green
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# ============================================================================
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# SCENARIO 2: Merge Revert (Merge Commit with -m flag)
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# ============================================================================
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Write-Host "`nScenario 2: Creating merge-revert scenario..." -ForegroundColor Cyan
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# Switch back to main
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git switch main | Out-Null
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# Create merge-revert branch
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git switch -c merge-revert | Out-Null
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# Create a feature branch to merge
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git switch -c feature-auth | Out-Null
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# Add auth functionality
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$authContent = @"
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# auth.py - Authentication module
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def login(username, password):
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\"\"\"Login user.\"\"\"
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print(f"Logging in {username}...")
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return True
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def logout(username):
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\"\"\"Logout user.\"\"\"
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print(f"Logging out {username}...")
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return True
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"@
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Set-Content -Path "auth.py" -Value $authContent
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git add .
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git commit -m "Add authentication module" | Out-Null
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# Add password validation
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$authContent = @"
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# auth.py - Authentication module
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def validate_password(password):
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\"\"\"Validate password strength.\"\"\"
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return len(password) >= 8
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def login(username, password):
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\"\"\"Login user.\"\"\"
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if not validate_password(password):
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print("Password too weak!")
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return False
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print(f"Logging in {username}...")
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return True
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def logout(username):
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\"\"\"Logout user.\"\"\"
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print(f"Logging out {username}...")
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return True
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"@
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Set-Content -Path "auth.py" -Value $authContent
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git add .
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git commit -m "Add password validation" | Out-Null
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# Integrate auth into calculator (part of the feature branch)
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$calcContent = @"
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# calculator.py - Simple calculator
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from auth import login
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def add(a, b):
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"""Add two numbers."""
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return a + b
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def subtract(a, b):
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"""Subtract b from a."""
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return a - b
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def secure_divide(a, b, username):
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"""Secure divide - requires authentication."""
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if login(username, "password123"):
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return a / b
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return None
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"@
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Set-Content -Path "calculator.py" -Value $calcContent
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git add .
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git commit -m "Integrate auth into calculator" | Out-Null
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# Switch back to merge-revert and merge feature-auth
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git switch merge-revert | Out-Null
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git merge feature-auth --no-ff -m "Merge feature-auth branch" | Out-Null
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Write-Host "[CREATED] merge-revert branch with merge commit to revert" -ForegroundColor Green
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# ============================================================================
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# SCENARIO 3: Multi Revert (Multiple Bad Commits)
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# ============================================================================
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Write-Host "`nScenario 3: Creating multi-revert branch..." -ForegroundColor Cyan
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# Switch back to main
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git switch main | Out-Null
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# Create multi-revert branch
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git switch -c multi-revert | Out-Null
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# Reset calculator to simple version
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$calcContent = @"
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# calculator.py - Simple calculator
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def add(a, b):
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"""Add two numbers."""
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return a + b
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def subtract(a, b):
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"""Subtract b from a."""
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return a - b
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"@
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Set-Content -Path "calculator.py" -Value $calcContent
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git add .
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git commit -m "Reset to basic calculator" | Out-Null
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# Good commit: Add power function
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$calcContent = @"
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# calculator.py - Simple calculator
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def add(a, b):
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"""Add two numbers."""
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return a + b
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def subtract(a, b):
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"""Subtract b from a."""
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return a - b
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def power(a, b):
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"""Raise a to the power of b."""
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return a ** b
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"@
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Set-Content -Path "calculator.py" -Value $calcContent
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git add .
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git commit -m "Add power function" | Out-Null
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# BAD commit 1: Add broken square_root
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$calcContent = @"
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# calculator.py - Simple calculator
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def add(a, b):
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"""Add two numbers."""
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return a + b
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def subtract(a, b):
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"""Subtract b from a."""
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return a - b
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def power(a, b):
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"""Raise a to the power of b."""
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return a ** b
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def square_root(a):
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"""BROKEN: Returns wrong result for negative numbers!"""
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return a ** 0.5 # This returns NaN for negative numbers!
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"@
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Set-Content -Path "calculator.py" -Value $calcContent
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git add .
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git commit -m "Add broken square_root - REVERT THIS!" | Out-Null
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# BAD commit 2: Add broken logarithm
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$calcContent = @"
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# calculator.py - Simple calculator
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def add(a, b):
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"""Add two numbers."""
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return a + b
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def subtract(a, b):
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"""Subtract b from a."""
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return a - b
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def power(a, b):
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"""Raise a to the power of b."""
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return a ** b
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def square_root(a):
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"""BROKEN: Returns wrong result for negative numbers!"""
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return a ** 0.5 # This returns NaN for negative numbers!
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def logarithm(a):
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"""BROKEN: Doesn't handle zero or negative numbers!"""
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import math
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return math.log(a) # This crashes for a <= 0!
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"@
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Set-Content -Path "calculator.py" -Value $calcContent
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git add .
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git commit -m "Add broken logarithm - REVERT THIS TOO!" | Out-Null
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# Good commit: Add absolute value (after bad commits)
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$calcContent = @"
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# calculator.py - Simple calculator
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def add(a, b):
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"""Add two numbers."""
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return a + b
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def subtract(a, b):
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"""Subtract b from a."""
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return a - b
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def power(a, b):
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"""Raise a to the power of b."""
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return a ** b
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def square_root(a):
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"""BROKEN: Returns wrong result for negative numbers!"""
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return a ** 0.5 # This returns NaN for negative numbers!
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def logarithm(a):
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"""BROKEN: Doesn't handle zero or negative numbers!"""
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import math
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return math.log(a) # This crashes for a <= 0!
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def absolute(a):
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"""Return absolute value of a."""
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return abs(a)
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"@
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Set-Content -Path "calculator.py" -Value $calcContent
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git add .
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git commit -m "Add absolute value function" | Out-Null
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Write-Host "[CREATED] multi-revert branch with two bad commits to revert" -ForegroundColor Green
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# ============================================================================
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# Return to regular-revert to start
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# ============================================================================
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git switch regular-revert | Out-Null
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# Return to module directory
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Set-Location ..
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Write-Host "`n=== Setup Complete! ===" -ForegroundColor Green
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Write-Host "`nThree revert scenarios have been created:" -ForegroundColor Cyan
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Write-Host " 1. regular-revert - Revert a single bad commit (basic)" -ForegroundColor White
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Write-Host " 2. merge-revert - Revert a merge commit with -m flag" -ForegroundColor White
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Write-Host " 3. multi-revert - Revert multiple bad commits" -ForegroundColor White
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Write-Host "`nYou are currently on the 'regular-revert' branch." -ForegroundColor Cyan
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Write-Host "`nNext steps:" -ForegroundColor Cyan
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Write-Host " 1. cd challenge" -ForegroundColor White
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Write-Host " 2. Read the README.md for detailed instructions" -ForegroundColor White
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Write-Host " 3. Complete each revert challenge" -ForegroundColor White
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Write-Host " 4. Run '..\verify.ps1' to check your solutions" -ForegroundColor White
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Write-Host ""
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Reference in New Issue
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