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{{title|title=
/bin/bash Proper Whitespace Handling - Whitespace Safety
}}
{{#seo:
|description=Supporting multiple command line parameters with spaces in wrapper scripts.
}}
{{intro|
Supporting multiple command line parameters with spaces in wrapper scripts.
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= Bash Proper Whitespace Handling =
<pre>
#!/bin/bash

## https://yakking.branchable.com/posts/whitespace-safety/

set -e

app_user=user
lib_dir="/tmp/test/lib/program with space/something spacy"
main_app_dir="/tmp/test/home/user/folder with space/abc"
mkdir -p "$lib_dir"
mkdir -p "$main_app_dir"

declare -a cmd

cmd+=("cp")
cmd+=("-r")
cmd+=("${lib_dir}")
cmd+=("${main_app_dir}/")

"${cmd[@]}"
</pre>

= nounset - Check if Variable Exists  =

<pre>
#!/bin/bash

set -x
set -e
set -o nounset

## Enable for testing.
#unset HOME

if [ -z "${HOME+x}" ]; then
    echo "Error: HOME is not set."
fi

echo "$HOME"
</pre>

= misc =
<pre>
base_name="${file_name##*/}"
file_extension="${base_name##*.}"
</pre>

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[[Category: Design]]