how to resolve warning ''using a subshell to avoid having to cd back'

Question

The folder structure like this:

folder_01
├── folder_02├──Dockerfile_02
├── folder_03├──Dockerfile_03 & example.sh

In the example.sh script, I want to use cd to navigate back to folder_02 and use the dockerfile_02 to build an image and then navigate back to the current dir (which is folder_03) Here's what I tried:

cd ..
cd ./folder_02
docker build . -t image_name

cd ..
cd ./folder_03

In intelliJ, it gave me warning using a subshell to avoid having to cd back, I read some documentation about it but haven't got a solution, can someone help me?

Answer 1

You can invoke the commands in a subshell (...):

(
   cd ./folder_02
   docker build . -t image_name
)
(
   cd ./folder_03
   something else
)

In scripts that I want to preserve environment I use pushd+popd.

pushd ./folder_02 >/dev/null
docker build . -t image_name
popd >/dev/null

pushd ./folder_03 >/dev/null
something soemthing
popd >/dev/null