bash scripting with echo, pipe, and variables

Question

I'd like to retrieve the result of a

echo $1/*.pem 

and put the result in a array.

I tried:

a = echo $1/*.pem | grep pem  *

or

a = echo $1/*.pem

It fails.

When I do:

echo $1/*.pem 

it display the good result

/opt/tmp/a.pem /opt/tmp/ab.pem

Answer 1

You can let bash do the expansion and use parenthesis to cast an array without the use of echo :

a=( "$1"/*.pem )
echo "${a[@]}"

You can use echo but you'll have to use command substitution to reassign the output of the echo command to the array, and you will have problems if you have spaces in the name of your path:

a=( $(echo $1/*.pem) )