helm push not putting quotes around scientific notation like numbers

[karuppiah7890]

With helm 2.16.1, helm-push 0.7.1 and chartmuseum 0.10.0, try the below

$ helm create old-chart
$ # change appVersion in Chart.yaml to "722225e2"
$ vi old-chart/Chart.yaml
$ # now push the chart to chartmuseum repo called "local"
$ helm push old-chart local
$ # check the index.yaml
$ curl http://localhost:8080/index.yaml
apiVersion: v1
entries:
old-chart:

• apiVersion: v1
  appVersion: "7.22225e+07"
  created: "2019-12-04T22:16:19.562137212+05:30"
  description: A Helm chart for Kubernetes
  digest: 0b891b622bd0ab3e8e22302dab504481d10887a011bb92f38830097c44b3ccd3
  name: old-chart
  urls:
  • charts/old-chart-0.1.0.tgz
    version: 0.1.0
    generated: "2019-12-04T22:16:22+05:30"
    serverInfo: {}

Now if you see the appVersion, you notice that it's in some scientific notation form. This does not happen when directly curl is used to push charts this way -

$ helm package old-chart
$ # check the tar ball Chart.yaml, it will still be "722225e2" 
$ vi old-chart-0.1.0.tgz
$ curl --data-binary "@old-chart-0.1.0.tgz" http://localhost:8080/api/charts

The issue is in helm-push. When push is done, the chart contents are read (parsed), and then later pushed to chartmuseum. While parsing and then serializing, it removes the quotes (due to a yaml package bug) and then it pushes to the chartmusem, where the number is made into a string and put in double quotes, but it's converted a bit, compared to the original string

Updating yaml package to latest version solves the issue