grep can't output all group captures after one grep action.
so. each grep a time.
ex.
input_string= "Caused by: java.io.FileNotFoundException: /tmp/storage/imart/public/storage/default/im_workflow/data/default/transaction/202107/21/16/ma_8g2mm9ovekgierj/result/ep_8g2mo7z76kgrmrj/flow.xml (No such file or directory)"
#I want to get
#[1]=/tmp/storage/imart/public/storage/default/im_workflow/data/default/transaction
#[2]=202107/21/16/
#[3]=ma_8g2mm9ovekgierj
#[4]=ep_8g2mo7z76kgrmrj
#cmd:
a1=$(echo $input_string | grep -ioE "/tmp/.+/transaction")
echo $a1
:/tmp/storage/imart/public/storage/default/im_workflow/data/default/transaction
a2=$(echo $input_string | grep -ioE "[0-9]{6}/[0-9]{2}/[0-9]{2}")
echo $a2
=> 202107/21/16
a3=$(echo $input_string | grep -ioE "[0-9]{6}/[0-9]{2}/[0-9]{2}/\w+" | grep -ioE "\w+$")
echo $a3
:ma_8g2mm9ovekgierj
a4=$(echo $input_string | grep -ioE "\w+/flow" | grep -ioE "^\w+")
echo $a4
:ep_8g2mo7z76kgrmrj
$ echo $input_string | grep -ioE "/tmp/.+/transaction"
