Function libraries (sourcing scripts) in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to source the functions from the file lib.sh.

Bash Scripting

source [1]

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

A./lib.sh

Blib

Cfunctions.sh

Dlib.sh

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to add ./ before the script name.

Using just the script name without path.

Using a wrong filename.

To source a script in the current directory, you use source ./filename. This runs the script in the current shell, making its functions available.

2fill in blank

medium

Complete the code to check if the file utils.sh exists before sourcing it.

Bash Scripting

if [ -f [1] ]; then
  source ./utils.sh
fi

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

Autils.sh

B./utils.sh

Cutils

Dfunctions.sh

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for the wrong filename.

Omitting the path and checking a file that may not be found.

Using -d instead of -f.

The -f test checks if a file exists and is a regular file. Using ./utils.sh ensures the correct path is checked.

3fill in blank

hard

Fix the error in the code to source helpers.sh safely.

Bash Scripting

if [ -f helpers.sh ]; then
  [1] ./helpers.sh
fi

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

Ainclude

Bimport

Csource

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using include or import which are not bash commands.

Trying to run the script as a separate process.

In bash, source is the correct command to run a script in the current shell. include and import are not valid bash commands.

4fill in blank

hard

Fill both blanks to source functions.sh only if it exists and is readable.

Bash Scripting

if [ [1] functions.sh -a [2] functions.sh ]; then
  source ./functions.sh
fi

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

A-f

B-r

C-d

D-x

Attempts:

3 left

💡 Hint

Common Mistakes

Using -d which checks for directories.

Using -x which checks for executable permission.

Use -f to check if the file exists and is a regular file, and -r to check if it is readable.

5fill in blank

hard

Fill all three blanks to create a function load_lib that sources a given script if it exists.

Bash Scripting

load_lib() {
  if [ -f [1] ]; then
    source ./[2]
  else
    echo "File [3] not found."
  fi
}

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

A$1

Dlib.sh

Attempts:

3 left

💡 Hint

Common Mistakes

Hardcoding the filename instead of using the argument.

Using different variables for each blank.

The function uses the first argument $1 to check, source, and print the filename dynamically.