css/script/release-candidate

#!/bin/bash
set -e
echo "👌  Publishing release candidate..."

PATH=$(npm bin):$PATH

package=primer-css
npm_tag=rc
log=/tmp/rc.log

# get the version we're publishing as a release candidate
local_version=$(jq -r .version modules/$package/package.json)
if [[ $local_version =~ "-" ]]; then
  echo "❌  Found pre-release version: $package@$local_version; bailing!"
  exit 1
else
  echo "🏔  Local version: $package@$local_version"
fi

# get the version most recently published to the rc dist-tag
rc_version=$(npm info $package@$npm_tag version)
echo "📦  Published version for $package@$npm_tag: $rc_version"
rc_release=${rc_version%-*}
if [[ $local_version != $rc_release ]]; then
  rc_version=$local_version
fi

# determine the 
next_version=$(
  semver --increment prerelease --preid $npm_tag $rc_version
)
echo "🤜  Next version: $package@$next_version"

# strip the pre-release version, yielding just major.minor.patch
pre_version=${next_version:${#local_version}}
echo "   Prerelease suffix: '$pre_version'"

# if this is the same version, we need to bump the prerelease
# for all of the modules using the same prerelease identifier
echo "Updating all module versions in place..."
echo
module_dirs=modules/primer-*
for module_dir in $module_dirs; do
  pushd $module_dir > /dev/null
  module=$(basename $module_dir)

  # determine the local version (in git)
  module_version=$(jq -r .version package.json)
  # strip the rc version, just in case
  module_version=${module_version%-*}
  module_next_version="$module_version$pre_version"

  echo "$module@$module_version => $module_next_version"
  # "upgrade" to the most recent RC version so that
  # `npm version prerelease` can increment automatically
  npm version --no-git --quiet "$module_next_version" >> $log

  popd > /dev/null
done

# publish all the things!
script/notify pending
# note: this should NOT fail, so --bail=true applies
lerna exec -- npm publish --tag=$npm_tag
script/notify success