publish-npm

#!/usr/bin/env bash

set -eux

npm config set '//registry.npmjs.org/:_authToken' "$NPM_TOKEN"

yarn build
cd dist

# Get latest version from npm
#
# If the package doesn't exist, yarn will return
# {"type":"error","data":"Received invalid response from npm."}
# where .data.version doesn't exist so LAST_VERSION will be an empty string.
LAST_VERSION="$(yarn info --json 2> /dev/null | jq -r '.data.version')"

# Get current version from package.json
VERSION="$(node -p "require('./package.json').version")"

# Check if current version is pre-release (e.g. alpha / beta / rc)
CURRENT_IS_PRERELEASE=false
if [[ "$VERSION" =~ -([a-zA-Z]+) ]]; then
  CURRENT_IS_PRERELEASE=true
  CURRENT_TAG="${BASH_REMATCH[1]}"
fi

# Check if last version is a stable release
LAST_IS_STABLE_RELEASE=true
if [[ -z "$LAST_VERSION" || "$LAST_VERSION" =~ -([a-zA-Z]+) ]]; then
  LAST_IS_STABLE_RELEASE=false
fi

# Use a corresponding alpha/beta tag if there already is a stable release and we're publishing a prerelease.
if $CURRENT_IS_PRERELEASE && $LAST_IS_STABLE_RELEASE; then
  TAG="$CURRENT_TAG"
else
  TAG="latest"
fi

# Publish with the appropriate tag
yarn publish --access public --tag "$TAG"