Nested For Loop Control Flow Sequence

Question

for PRODUCT in ${AAA} ${BBB} ${CCC}; do
  for GITBRANCH in ${AAA_BRANCH} ${BBB_BRANCH} ${CCC_BRANCH}; do
    cd ${PRODUCT}
    git checkout ${GITBRANCH}
done;
done

My nested for loop in bash (above) does:

cd under AAA repo and check out AAA_BRANCH
cd under AAA repo and check out BBB_BRANCH
cd under AAA repo and check out CCC_BRANCH
cd under BBB repo and check out AAA_BRANCH
cd under BBB repo and check out BBB_BRANCH
cd under BBB repo and check out CCC_BRANCH
cd under CCC repo and check out AAA_BRANCH
cd under CCC repo and check out BBB_BRANCH
cd under CCC repo and check out CCC_BRANCH

I want my loop to:

cd under AAA repo and check out AAA_BRANCH
cd under BBB repo and check out BBB_BRANCH
cd under CCC repo and check out CCC_BRANCH

How can I accomplish this? Thx

oguz ismail · Accepted Answer · 2020-05-08 11:54:26Z

2

Use arrays instead and iterate over indices.

products=(aaa bbb ccc)
branches=(aaa_branch bbb_branch ccc_branch)
for i in "${!products[@]}"; do
  cd "${products[i]}"
  git checkout "${branches[i]}"
  cd -
done

edited May 8, 2020 at 11:54

answered May 8, 2020 at 4:29

oguz ismail

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