Store output of shell command with multiple arguments into an array

Question

I'm trying to store the states of my terraform workspaces in an array using shell.

I'm trying this way which usually works for me:

declare -a workspace_list=( $(terraform workspace list))

for a in $(seq 0 ${#workspace_list[*]})
do  
    if [[ -z ${workspace_list[$a]} ]]
        then  
              break
        fi
    echo $(($a+1))": "${workspace_list[$a]}
    a=$(($a+1))
done

However, it gives me an output with all the files in the directory as well along with the workspaces.

I'm guessing it's to do with the multiple args with terraform command. Please help.

Output of terraform workspace list for reference

Could you print the output of "terraform workspace list" so that we can see the raw data ? — user18098820
– user18098820, Commented Feb 11, 2022 at 7:47
Use readarray/mapfile to populate an array with lines of a file/command output. — Shawn
– Shawn, Commented Feb 11, 2022 at 8:41

Kombajn zbożowy · Accepted Answer · 2022-02-11 08:46:10Z

1

When you initialize the array with the result of terraform command it looks like:

declare -a workspace_list=( * default dev-singapore)

Here, * is glob-expanded to list of all files in current directory.

You can get rid of the asterisk just processing terraform's output.

declare -a workspace_list=($(terraform workspace list | sed 's/*//'))

Unfortunately unlike terraform plan, there is no option for JSON output from terraform workspace, which would be more clean.

answered Feb 11, 2022 at 8:46

Kombajn zbożowy

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