How to run bash commands from array?

Question

I have three commands I running in shell file (app.sh):

docker-compose -f .docker/docker-compose.my-app1.yml push my-app1
docker-compose -f .docker/docker-compose.my-app2.yml push my-app2
docker-compose -f .docker/docker-compose.my-app3.yml push my-app3

how to create array and pass the values to command with foreach?

say if it's was nodejs I'll do:

['my-app1', 'my-app2', 'my-app3'].forEach(i => {

  … `-f .docker/docker-compose.${i}.yml push ${i}` ...;
})

If it's Linux then something like this in script. for n in $(cat lists.txt ) do echo "Working on $n file name now" # do something on $n below, say count line numbers # wc -l "$n" done — rootkonda
– rootkonda, Commented Feb 17, 2020 at 16:24

chepner · Accepted Answer · 2020-02-17 16:34:22Z

3

In BASH you can have arrays and for loops as follows

arr=( 'my-app1' 'my-app2' 'my-app3' )

for i in "${arr[@]}" ; do
   docker-compose -f ".docker/docker-compose.${i}.yml" push "${i}"
done

Note, that you do not need to use commas to separate array elements as whitespace is a token separator in BASH.

edited Feb 17, 2020 at 16:34

chepner

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answered Feb 17, 2020 at 16:29

Dima Chubarov

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