Why hooks automate workflows in Git - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a Git hook script that runs before a commit.

Git

#!/bin/sh

[1]

Drag options to blanks, or click blank then click option'

Agit status

Becho "Pre-commit hook running"

Cgit push origin main

Dgit commit -m "message"

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to run git commands inside the hook without context

Not using echo to show output

This script prints a message before a commit is made, showing the hook runs automatically.

2fill in blank

medium

Complete the code to make a pre-push hook that prevents pushing if tests fail.

Git

#!/bin/sh

if ! [1]; then
  echo "Tests failed, push aborted."
  exit 1
fi

Drag options to blanks, or click blank then click option'

Agit status

Bls -l

Cecho 'Running tests'

Dmake test

Attempts:

3 left

💡 Hint

Common Mistakes

Using commands that don't test code

Not checking command success with if !

The hook runs tests using 'make test'. If tests fail, it stops the push.

3fill in blank

hard

Fix the error in this commit-msg hook that rejects empty commit messages.

Git

#!/bin/sh

if [ -z "$(cat [1])" ]; then
  echo "Empty commit message not allowed."
  exit 1
fi

Drag options to blanks, or click blank then click option'

Acommit-msg

Bmessage.txt

C$1

DCOMMIT_MSG

Attempts:

3 left

💡 Hint

Common Mistakes

Hardcoding file names

Not using $1 to get the commit message file

The commit message file path is passed as the first argument ($1) to the hook script.

4fill in blank

hard

Fill both blanks to create a post-commit hook that logs the commit hash.

Git

#!/bin/sh

commit_hash=$(git [1] -1 --format=%H)
echo "Commit [2]: $commit_hash" >> commit_log.txt

Drag options to blanks, or click blank then click option'

Alog

Bstatus

Chash

Dcommit

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong git commands

Incorrect echo message content

'git log -1 --format=%H' gets the latest commit hash. The script logs it with a message.

5fill in blank

hard

Fill all three blanks to create a pre-receive hook that rejects pushes to the main branch.

Git

#!/bin/sh

while read oldrev newrev refname; do
  if [ "$refname" = [1] ]; then
    echo "Pushes to [2] are not allowed."
    exit [3]
  fi
 done

Drag options to blanks, or click blank then click option'

A"refs/heads/main"

B"main"

C1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using just 'main' for refname check

Using exit 0 which allows push

The hook checks if the refname equals 'refs/heads/main' and rejects the push with exit code 1.