Bash Python Release Bump and Tag

release.sh

#!/bin/bash


echo "---------Existing Tags---------"
git show-ref --tags -d
echo "-------------------------------"

function increase_version() {
    python - "$1" "$2" <<EOF
import sys
kind = int(sys.argv[1])
current_version = sys.argv[2]
parts = current_version.split('.')
parts[kind] = str(int(parts[kind]) + 1)
new_version = ".".join(parts)
print(new_version)
EOF
}

function update_setup_py() {
    sed -i "" "s/version=\"$1\"/version=\"$2\"/g" setup.py
}

sem_ver_type=$1

current_version=$(python setup.py --version)
new_version=$(python setup.py --version)
should_bump=false
if [ -n "$sem_ver_type" ]; then
    case "$sem_ver_type" in
        major)
            echo "attempting major bump"
            new_version=$(increase_version 0 $current_version)
            should_bump=true
            ;;
         
        minor)
            echo "attempting minor bump"
            new_version=$(increase_version 1 $current_version)
            should_bump=true
            ;;
         
        patch)
            echo "attempting patch bump"
            new_version=$(increase_version 2 $current_version)
            should_bump=true
            ;;
        *)
            echo $"Error, invalid semver type specified. Usage: $0 {major|minor|patch}"
            exit 1
    esac
fi

if [ "$should_bump" = true ] ; then
    echo "Old version ($current_version) -> New version ($new_version)"
    if [[ -n $(git status -s) ]]; then
        echo "Working tree dirty. Please commit or stash all work before creating a new release"
        exit 1
    else
        echo "Updating version in setup.py"
        update_setup_py "$current_version" "$new_version"
        git add .
        git commit -m "[$new_version] Bump version from $current_version to $new_version for $sem_ver_type release"
    fi
fi

echo "Creating tag with version $new_version"
git tag $new_version
could_create_tag=$?
if [ $could_create_tag -eq 0 ]; then
    echo "Tag created. Pushing..."
    git push --tags
else
    echo "Version already exists. Please update the version in setup.py or use this script to bump the version e.g. ./release.sh {major|minor|patch}"
    exit 1
fi