Given a file (or a process) that produces comma separated values, here's how to split those into separate variables and use them in a bash script.
\nThe trick is to set the Bash IFS to a delimiter, then use my_array=($my_string) to split on that delimiter.
Create a text file called data.txt containing this:
first,1\nsecond,2\nYou can create that by doing:
\necho 'first,1\nsecond,2' > /tmp/data.txtTo loop over that file and print each line:
\nfor line in $(cat /tmp/data.txt);\ndo\n echo $line\ndoneTo split each line into two separate variables in the loop, do this:
\nfor line in $(cat /tmp/data.txt);\ndo\n IFS=$','; split=($line); unset IFS;\n # $split is now a bash array\n echo \"Column 1: ${split[0]}\"\n echo \"Column 2: ${split[1]}\"\ndoneOutputs:
\nColumn 1: first\nColumn 2: 1\nColumn 1: second\nColumn 2: 2\nHere's a script I wrote using this technique for the TIL Use labels on Cloud Run services for a billing breakdown:
\n#!/bin/bash\nfor line in $(\n gcloud run services list --platform=managed \\\n --format=\"csv(SERVICE,REGION)\" \\\n --filter \"NOT metadata.labels.service:*\" \\\n | tail -n +2)\ndo\n IFS=$','; service_and_region=($line); unset IFS;\n service=${service_and_region[0]}\n region=${service_and_region[1]}\n echo \"service: $service region: $region\"\n gcloud run services update $service \\\n --region=$region --platform=managed \\\n --update-labels service=$service\n echo\ndone