Increment semver version as prerelease in Github Actions

prerelease.sh

yarn global add semver
PATH="$(yarn global bin):$PATH"

# take npm version and increment it
PKG_NAME="$(cat package.json | jq -r .name)"

# sanitize branch name so it can be used as a semver suffix (replace [^0-9a-zA-Z-] with hyphen)
SANITIZED_BRANCH="$(echo -n "${{ env.BRANCH_NAME }}" | tr -C '[:alnum:]-' -)"

# take all versions from npm and replace single quotes with double quotes
NPM_VERSIONS=$(yarn info --silent fluence versions | tr \' \")
# take only versions that contain branch name
NPM_VERSIONS_FILTERED=$(echo $NPM_VERSIONS | jq -r '.[] | select(contains("$SANITIZED_BRANCH"))')
# flatten into a single line
NPM_VERSIONS_FLATTENED=$(echo $NPM_VERSIONS_FILTERED | awk '{print}' ORS=' ')
# sort versions according to semver, take highest (last)
LAST_NPM_VERSION="$(semver -p $(echo $NPM_VERSIONS_FLATTENED) | tail -n1)"
# increment prerelease part of the version
PRERELEASE_NPM_VERSION="$(semver --increment prerelease --preid "$SANITIZED_BRANCH" "$LAST_NPM_VERSION")"

# take local version
LOCAL_VERSION="$(cat package.json | jq -r .version)"
# set prerelease part on local version
LOCAL_PRERELEASE_VERSION="$(semver --increment prerelease --preid "$SANITIZED_BRANCH" "$LOCAL_VERSION")"

# take the highest version
MAX_VERSION="$(semver "$LOCAL_PRERELEASE_VERSION" "$PRERELEASE_NPM_VERSION" | tail -n1)"

# save info to env
echo "FINAL_VERSION=$MAX_VERSION" | tee -a $GITHUB_ENV
echo "PKG_NAME=$PKG_NAME" | tee -a $GITHUB_ENV"