"version: git" can produce version strings too long for snapd

[Daniel Holbach]

The following snapcraft.yaml (to go into the github.com/weaveworks/flux tree):

name: fluxctl
version: git
summary: fluxctl talks to Weave Flux and helps you deploy your code
description: |
  fluxctl talks to your Weave Flux instance and exposes all its
  functionality to an easy to use command line interface.
grade: devel # must be 'stable' to release into candidate/stable channels
confinement: strict
plugs:
  system-files:
    read: [/etc/kube/config]
  personal-files:
    read:
      - $HOME/.kube/config
      - $HOME/.minikube/client.key
      - $HOME/.minikube/client.crt
      - $HOME/.minikube/ca.crt

parts:
  fluxctl:
    plugin: go
    go-importpath: github.com/weaveworks/flux
    prime:
      - bin/fluxctl

apps:
  fluxctl:
    command: fluxctl
    plugs: [system-files, personal-files, network, network-bind]

snapd gives:

[daniel@reef flux ]$ snap install --dangerous fluxctl_chart-0.2.1+git664.3a0e5b88-dirty_amd64.snap
Fehler: cannot read snap file: invalid snap version "chart-0.2.1+git664.3a0e5b88-dirty": cannot be
        longer than 32 characters (got: 33)
[daniel@reef flux ]$

[Guilhem Lettron (guilhem-fr)]

You may use `version-script:` to forge your own command line.
Maybe default options of `git describe` aren't good for your project.

[Daniel Holbach (dholbach)]

Super, thanks for the tip.