fix: let's check for a cache hit before cloning

Author: parker-snyk

.circleci/build-cli.sh

@@ -2,12 +2,22 @@
 
 echo "Cloning CLI repo"
 cd ~
-git clone https://github.com/snyk/cli.git
+# If the CLI repo doesn't exist (due to caching), clone it
+if [ ! -d "~/cli" ]; then
+    echo "Cloning CLI repo"
+    git clone https://github.com/snyk/cli.git
+else
+    echo "CLI repo already exists from cache"
+fi
+
 cd cli
 echo "Replacing snyk-docker-plugin dependency with SHA $CIRCLE_SHA1"
 sed -iE  "s/\"snyk-docker-plugin\": \".*\",/\"snyk-docker-plugin\": \"git:\/\/github.com\/snyk\/snyk-docker-plugin.git#$CIRCLE_SHA1\",/" package.json
+
 sudo npm i -g npm@7
+
 echo "Running npm install"
 npm i
+
 echo "Running build"
 npm run build