branch-to-tag

#!/bin/bash

function usage {
    echo "Replaces branch with tag in local and remote repos."
    echo
    echo "Usage:"
    echo "    $0 <remote> <branch>"
}

if [ -z "$1" ]; then
    usage
    echo
    echo "ERROR"
    echo "No remote specified"
    exit 1
fi
remote="$1"

if [ -z "$2" ]; then
    usage
    echo
    echo "ERROR"
    echo "No branch specified"
    exit 1
fi
branch="$2"
tag="$2"

git status &> /dev/null
if [[ "$?" > 0 ]]; then
    echo "ERROR"
    echo "Not in git repository"
    exit 1
fi

cur_branch=$(git rev-parse --symbolic-full-name --abbrev-ref HEAD)
git checkout "$branch" &> /dev/null
if [[ "$?" > 0 ]]; then
    echo "ERROR"
    echo "Can't find branch with name $branch"
    exit 1
fi

git tag "$tag"
if [[ "$cur_branch" == "$branch" ]]; then
    git checkout master &> /dev/null
else
    git checkout "$cur_branch" &> /dev/null
fi
git branch -d "$branch" &> /dev/null
git push "$remote" ":$branch" &> /dev/null
git push "$remote" "$tag" &> /dev/null