bash - Git branches automate with source code -

i automating git brnach project using shell script. code description

• i going source directory
• i doing remote update
• i asking user enter branch, if user entered wrong branch name

• if branch doest not exist catch error , show user otherwise git checkout , pull code branch

  *

   #!/bin/bash             cd application/src/         git remote update         echo "please check available branch in git"         git branch          echo "please enter branch name: "         read branch_name         echo "you entered: $branch_name"          branch=$(git branch)         files=(branch*)          select sel in "${files[@]}"                    if  [[ "$sel" ] !== '(no branch)']                             echo "choose 1 of available branch."                 break             else                 git checkout $branch_name                 git pull origin $branch_name  done        git checkout $branch_name         git branch         git pull origin $branch_name* 

and getting error.

please enter branch name: 1.5 entered: 1.5 ram: line 21: conditional binary operator expected ram: line 21: syntax error near `]' ram: line 21: `    if  [[ "$sel" ] !== '(no branch)']' 

can this..

why did put [ ] around $sel. rewrite as:

if  [ "$sel" !== '(no branch)']'