bug: plugin updates do not update existing tags

[tysonliddell]

Did you check docs and existing issues?

• I have read all the lazy docs
• I have searched the existing issues of lazy
• I have searched the exsiting issues of the plugin I have a problem with

Neovim version (nvim -v)

NVIM v0.8.1

Operating system/version

MacOS 12.8

Describe the bug

I am using { 'folke/lazy.nvim', tag = 'stable' } as a temporary workaround for #260. This morning when I did :Lazy update, it did not update to the latest stable version v7.7.0 (cba99de). Doing a git log in ~/.local/share/nvim/lazy/lazy.nvim, I observed that while the latest cba99de commit is present in the tree, the stable tag had not been updated. I suspect the cause is related to the following:

$ git fetch --all --tags
From https://github.com/folke/lazy.nvim
 ! [rejected]        stable     -> stable  (would clobber existing tag)

Steps To Reproduce

require("lazy").setup({
  { 'folke/lazy.nvim', tag = 'stable' },
})

Expected Behavior

I would expect setting tag = stable in the config would result in the tag being updated when it changes in the plugin repo, and hence the plugin updating to what is now stable.

Repro

No response

[folke]

Use version=* instead

[tysonliddell]

I am now. Does this tag behaviour need to be fixed?

[folke]

The problem is that the stable tag for lazy gets updated after every release.
Lazy would not do an update when tag=stable, since the local repo would already be on stable.

[folke]

Will fix it so it also works in that case