Semver act on all tags

[nicolas-goudry]

Hi,

I’m trying to make Flux work by monitoring all semver tags, whatever the version. Below is an example of what I’m trying rn:

apiVersion: source.toolkit.fluxcd.io/v1
kind: GitRepository
metadata:
  name: blog
  namespace: flux-system
spec:
  interval: 1m
  ref:
    semver: ">= 0.0.0-0"
  url: https://git.example.com/blog
  secretRef:
    name: blog-access-token
---
apiVersion: kustomize.toolkit.fluxcd.io/v1
kind: Kustomization
metadata:
  name: blog
  namespace: flux-system
spec:
  interval: 1m
  path: ./kustomize/overlays/staging
  prune: true
  sourceRef:
    kind: GitRepository
    name: blog

As one can see, I read this to end up with semver: ">= 0.0.0-0". However, this doesn’t work and blog’s GitRepository is reporting the following status:

failed to checkout and determine revision: no match found for semver: >= 0.0.0-0

Btw, there is the following tag in the repository: 0.0.1-rc250305.095646. Afaict, this tag is a valid semver tag but for some reason it doesn’t get picked up by Flux…

I tried to add a 0.0.1 tag on the same commit and I can see that Flux is happy and reporting: stored artifact for revision '0.0.1@sha1:xxx'.

What am I doing wrong? How to make flux monitor all semver tags, including (but not limited to) pre-release ones?

[nicolas-goudry]

After some tinkering, I found out that for some reason 0.0.1-rc250305.095646 is not valid, while 0.0.1-rc.250305095646 is.

Note

As per the spec, it seems that any dot separated identifier which consists only of digits cannot start by 0.

This is valid: 0.0.1-rc.0, 0.0.1-rc.0smthg, 0.0.1-rc.0123smthg
This is not: 0.0.1-rc.01

Flux is working as expected.

If one ends up here, they can run the following code snippet in the Go playground to check if their semver is valid:

package main

import (
	"fmt"

	"github.com/Masterminds/semver/v3"
)

func main() {
	v, err := semver.NewVersion("YOUR-SEMVER-HERE")
	if err != nil {
		fmt.Printf("invalid version: %s", err)
	}
	fmt.Printf("version is valid: %s", v)
}

Or check their semver against the RegExp provided in the spec.