fix: Fixing cache load step breaking when no lock file is detected

[dotkas]

If your project does not contain any lockfile at all, this logic falls through and does not copy anything to $TARGET_DIR/node-project-lockfile:

node-orb/src/scripts/packages/determine-lockfile.sh

Lines 6 to 16 in ab05d0e

	# Link corresponding lock file to a temporary file used by cache commands
	if [ -f "package-lock.json" ]; then
	echo "Found package-lock.json file, assuming lockfile"
	cp package-lock.json $TARGET_DIR/node-project-lockfile
	elif [ -f "npm-shrinkwrap.json" ]; then
	echo "Found npm-shrinkwrap.json file, assuming lockfile"
	cp npm-shrinkwrap.json $TARGET_DIR/node-project-lockfile
	elif [ -f "yarn.lock" ]; then
	echo "Found yarn.lock file, assuming lockfile"
	cp yarn.lock $TARGET_DIR/node-project-lockfile
	fi

However, if you run this without with-cache: false, this step fails:

node-orb/src/commands/install-packages.yml

Line 70 in ab05d0e

- node-deps-{{ arch }}-<<parameters.cache-version>>-<<#parameters.include-branch-in-cache-key>>{{ .Branch }}-<</parameters.include-branch-in-cache-key>><<^parameters.cache-only-lockfile>>{{ checksum "/tmp/node-project-package.json" }}-<</parameters.cache-only-lockfile>>{{ checksum "/tmp/node-project-lockfile" }}

As:

error computing cache key: template: cacheKey:1:41: executing "cacheKey" at <checksum "/tmp/node-project-lockfile">: error calling checksum: open /tmp/node-project-lockfile: no such file or directory

Expected behavior:

Caching step should complete without a lockfile present.

[orb-publisher]

Your development orb has been published. It will expire in 30 days.
You can preview what this will look like on the CircleCI Orb Registry at the following link:
https://circleci.com/developer/orbs/orb/circleci/node?version=dev:e87e1167357227b0841db7bb5b8f56c56858aff0

[KyleTryon]

Thank you for sending in this PR 👍

We will need to make another update to get these tests passing (not related to your changes). We'll have that here asap and then update this branch and run the tests again

[EricRibeiro]

Thank you! 🙇