commit-msg hook for message validation in Git - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to make the commit-msg hook executable.

Git

chmod +[1] .git/hooks/commit-msg

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

Ax

Br

Cw

Da

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'r' or 'w' instead of 'x' for execute permission.

Forgetting to set execute permission causes the hook not to run.

The commit-msg hook script must be executable, so we use chmod +x to add execute permission.

2fill in blank

medium

Complete the script line to read the commit message file path passed to the commit-msg hook.

Git

commit_msg_file=[1]

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

A$2

B$0

C$1

D$#

Attempts:

3 left

💡 Hint

Common Mistakes

Using $0 which is the script name, not the argument.

Using $2 or $# which are not the first argument.

The commit-msg hook receives the commit message file path as the first argument $1.

3fill in blank

hard

Fix the error in the regex check line to validate commit message starts with a capital letter.

Git

if ! head -1 "$commit_msg_file" | grep -qE '^[1]'; then

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

A[A-Z]

B[a-z]

C[0-9]

D[A-Z]+"

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase letters in regex when uppercase is required.

Using quantifiers like '+' unnecessarily here.

The regex ^[A-Z] checks if the first character is an uppercase letter.

4fill in blank

hard

Fill both blanks to reject commit messages shorter than 10 characters.

Git

msg_length=$(wc -c < "$commit_msg_file")
if [ "$msg_length" [1] [2] ]; then

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

A-lt

B>

C10

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using > instead of -lt causing wrong logic.

Using 5 instead of 10 as length threshold.

This checks if the message length is less than 10 characters and rejects it.

5fill in blank

hard

Fill all three blanks to print an error and exit with status 1 if validation fails.

Git

echo "[1]"
exit [2]
# End of hook [3]

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

AError: Commit message invalid.

B1

Cscript

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Exiting with 0 which means success.

Not printing any error message.

Print an error message, exit with status 1 to stop commit, and comment the script end.