postinstall is not run for mise exec

[hverlin]

Describe the bug

• postinstall step is not run when using mise exec.
• It also forces one to do mise install --force <tool> again if mise x <tool> was already run.

To Reproduce

[tools]
node = { version = "23", postinstall = 'corepack enable' }

Here is the current behavior

> mise x node -c 'pnpm -v'
mise [email protected] ✓ installed 
zsh:1: command not found: pnpm

> pnpm
zsh: command not found: pnpm

> mise install
mise all runtimes are installed

Expected behavior
Using mise x node -c 'pnpm -v' I would expect:

• mise to install node specified in my mise.toml file
• run the postinstall
• successfully run pnpm -v

i.e. same behavior as:

mise install
mise x -c 'pnpm -v'
9.12.2

mise version

mise -v
2024.10.13 macos-arm64 (ee83488 2024-10-28)

[jdx]

We can fix this, but since node is in your config there isn't any need to also specify it on the command line. If you didn't include it then it would work.

[hverlin]

I have noticed that it's not always working as it should if I don't specify the tool.
Let's say I only update mise.toml file and try to run mise -x.

Here is what happens:

[tools]
node = "23"

> mise x -c 'node -v'
mise WARN  missing: [email protected]
zsh:1: command not found: node

However, if I just type node it works (given that my shell had mise activated)

> node
mise [email protected] ✓ installed 
Welcome to Node.js v23.1.0.
Type ".help" for more information.
> 

[jdx]

Oh right, I forgot that is by design. It doesn't auto install if no other versions are installed

[hverlin]

For additional context, this is how I was thinking of using this.
In GitLab CI, I was thinking I could just do:

build:
  stage: build
  image: some-image-with-mise
  script: |
    mise x -c 'pnpm i'

without mise install

[hverlin]

It doesn't auto install if no other versions are installed

Ah, makes sense! Do you think it could be added to the warning message?

[jdx]

Do you think it could be added to the warning message?

I think it's too much noise, the fix should be obvious I would think—running mise i

[hverlin]

Maybe then, would it be possible to have a flag for mise exec and mise run to always run the install?

mise run --install ...
mise exec --install ...

(since in the code it anyway checks for it, and there is a force install option in the code)

This would fit nicely with https://mise.jdx.dev/tips-and-tricks.html#shebang

Another thing which surprised me is that postinstall does not require one to trust the file, whereas env variables do?

(Happy to contribute to fix this issue, btw)

[hverlin]

There is this setting also: https://mise.jdx.dev/configuration/settings.html#not_found_auto_install
I think it would need to clarify that it will auto-install only if:

• plugin is trusted?
• a tool does not exist already?

[jdx]

it only autoinstalls if at least 1 version is already installed

mise run --install ...

I don't think it's worth adding a flag for. I would just run mise i && mise x. shebang trick is a good point but I still don't think it's worth the noise.