shell - Bash scripting unexpected operator

Question

I'm writing script for git hook and have trouble with if statement inside while.

File:

#!/bin/sh
while read oldrev newref ref
do
    branch=$(git rev-parse --symbolic --abbrev-ref $ref)

    if [ "a"  == "a" ]
    then
        echo "Condition work"
    fi

    echo "$branch"
done

Error:

hooks/post-receive: 6: [: a: unexpected operator

I'll try with variables, double quotes but if doesn't work. What kind of error is here?

Thanks

Answer 1

if [ "a" == "a" ] should be if [ "a" = "a" ].

bash accepts == instead of =, but your /bin/sh probably isn't bash.

So either change the == to =, or your shebang to #!/bin/bash