VFox Tool Plugins Do Not Run Uninstall Hook

[Kenneth-Sills]

VFox offers an optional pre_uninstall hook for plugins, similar to asdf. It does look like our included version of vfox does have this hook registered, but it doesn't actually run when mise uninstall is used for tool plugins.

The tool plugin development documentation doesn't advertise this, so it may be intentional, but the asdf backend does trigger the uninstall hook unlike the vfox backend. I couldn't see anywhere in the documentation that said this feature was not available for tool plugins, either, so it came as a bit of a surprise.

`hooks/pre_uninstall.lua`

function PLUGIN:PreUninstall(ctx)
    print('Hello!')
end

`mise.toml`

[alias]
php-sury = 'git@<redacted>php-sury.git'

[tools]
php-sury = '8.3'

[tools.'github:composer/composer']
version = '2'
asset_pattern = 'composer.phar'
bin = 'composer'

[hooks]
enter = 'mise install -y'

`mise doctor`

version: 2025.8.21 linux-x64 (2025-08-27)
activated: yes
shims_on_path: no
self_update_available: yes

build_info:
Target: x86_64-unknown-linux-gnu
Features: DEFAULT, NATIVE_TLS, OPENSSL, RUSTLS_NATIVE_ROOTS, SELF_UPDATE
Built: Wed, 27 Aug 2025 09:31:22 +0000
Rust Version: rustc 1.89.0 (29483883e 2025-08-04)
Profile: release

shell:
/usr/bin/fish
fish, version 3.6.0

aqua:
baked in registry tools: 2076

dirs:
cache: ~/.cache/mise
config: ~/.config/mise
data: ~/.local/share/mise
shims: ~/.local/share/mise/shims
state: ~/.local/state/mise

config_files:
~/.config/mise/config.toml
~/projects/asdf-php/mise.toml
~/projects/asdf-php/test/basic/mise.toml

ignored_config_files: (none)

backends:
aqua
asdf
cargo
core
dotnet
gem
github
gitlab
go
npm
pipx
spm
http
ubi
vfox

plugins:
lua https://github.com/mise-plugins/mise-lua.git#9db66f3
php https://github.com/mise-plugins/asdf-php.git#e361a2c

toolset:
asdf:lua@5.1
core:java@21.0.2
core:node@24.7.0
git@/php-sury.git@8.3
github:composer/composer@2.8.11

path:
~/.local/share/mise/installs/php-sury/8.3
~/.local/share/mise/installs/github-composer-composer/2.8.11
~/.local/share/mise/installs/node/24.7.0/bin
~/.local/share/mise/installs/lua/5.1/bin
~/.local/share/mise/installs/lua/5.1/luarocks/bin
~/.local/share/mise/installs/java/21.0.2/bin
~/.local/bin
~/.cursor-server/cli/servers/Stable-e50823e9ded15fddfd743c7122b4724130c25df0/server/bin/remote-cli
~/.local/bin
~/.local/bin
/usr/local/bin
/usr/bin
/bin
/usr/games
/usr/local/games

env_vars:
MISE_SHELL=fish

settings:
auto_install true ~/.config/mise/config.toml
experimental true /.config/mise/config.toml
trusted_config_paths ["/projects"] ~/.config/mise/config.toml

No problems found

`mise uninstall php-sury -v`

DEBUG ARGS: mise uninstall php-sury -v
DEBUG config: ~/projects/asdf-php/test/basic/mise.toml
DEBUG config: ~/projects/asdf-php/mise.toml
DEBUG config: ~/.config/mise/config.toml
INFO  php-sury@8.3             uninstall
INFO  php-sury@8.3             remove ~/.local/share/mise/installs/php-sury/8.3
INFO  php-sury@8.3             remove ~/.cache/mise/php-sury/8.3
INFO  php-sury@8.3           ✓ uninstalled
DEBUG config: ~/projects/asdf-php/test/basic/mise.toml
DEBUG config: ~/projects/asdf-php/mise.toml
DEBUG config: ~/.config/mise/config.toml
DEBUG [vfox:php-sury] available_async
DEBUG Getting metadata for php-sury
DEBUG updating 3 lockfiles

[JasCodes]

@jdx This should be added or no?

[jdx]

I think so yes

[JasCodes]

Great, I am trying to save all me cask by doing something like
And wanted to write plugin to achive following
mise use cask:google-chrome --global which will do gloabal install

I know its bit of antipattern but I want everthing in one .toml file
for vfox needs pre-uninstall hook to remove from Application folder

@jdx
Any comments?

[prizrak1609]

+1 pre-uninstall hook is needed for vfox backend