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sarnobat/variable_is_set.sh

Last active September 21, 2017 21:20
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variable_is_set.sh
## default value
URL=${1:-"https://www.amazon.com/War-That-Made-America-French/dp/B000E1MXZ0"}
## Error message and exit with non zero status
${1:?"You didn't pass a value, exiting"}
## No need for this (even Bourne Shell has shorthands)
if [ -n "$1" ];
then
URL="$1"
else
URL="https://www.amazon.com/War-That-Made-America-French/dp/B000E1MXZ0"
fi
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