Add test for package version already exists

container-build/cerc-builder-js/build-npm-package.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 # Usage: build-npm-package.sh <registry-url> <publish-with-this-version>
 # Note: supply the registry auth token in CERC_NPM_AUTH_TOKEN
-if [ -n "$CERC_SCRIPT_DEBUG" ]; then
+if [[ -n "$CERC_SCRIPT_DEBUG" ]]; then
     set -x
 fi
 if ! [[ $# -eq 1 || $# -eq 2 ]]; then
@@ -17,11 +17,19 @@ if [[ $# -eq 2 ]]; then
 else
     package_publish_version=$( cat package.json | jq -r .version )
 fi
+# Get the name of this package from package.json since we weren't passed that
+package_name=$( cat package.json | jq -r .name )
 local_npm_registry_url=$1
 npm config set @lirewine:registry ${local_npm_registry_url}
 npm config set @cerc-io:registry ${local_npm_registry_url}
 npm config set -- ${local_npm_registry_url}:_authToken ${CERC_NPM_AUTH_TOKEN}
-echo "Build and publish version ${package_publish_version}"
+# First check if the version of this package we're trying to build already exists in the registry
+package_exists=$( yarn info --json ${package_name}@${package_publish_version} | jq -r .data.dist.tarball )
+if [[ -n "$package_exists" ]]; then
+    echo "${package_publish_version} of ${package_name} already exists in the registry, skipping build"
+    exit 0
+fi
+echo "Build and publish ${package_name} version ${package_publish_version}"
 yarn install
 yarn build
 yarn publish --non-interactive  --new-version ${package_publish_version} --no-git-tag-version