mise: MWE for project setup with project-local completions

mise.toml

[env]
LOCAL_FISH_COMPLETION_DIR = "{{config_root}}/.config/fish/completions"

[hooks]
postinstall = 'mkdir -p "$LOCAL_FISH_COMPLETION_DIR"'

[tasks.install-local-completions]
description = 'Install shell completions into project directory'
hide = true
run = '''
    {{arg(name="command")}} {{arg(name="completion_command", var=true)}} \
    > "$LOCAL_FISH_COMPLETION_DIR/{{arg(name="command")}}.fish"
'''

[tools.lefthook]
version = "1.10.10"
postinstall = 'mise run install-local-completions lefthook completion fish'

# TODO: can we (trigger) change(s) in env vars from hooks?
#       we want to (re-)source after writing completions!
# TODO: can we remove the completion (complete -e) on leave?
#       not a big deal, ut would be cleaner

source-completions.fish

# add to ~/.config/fish/conf.d/source-completions.fish

function source_completions --on-variable LOCAL_FISH_COMPLETION_DIR
    for cf in $LOCAL_FISH_COMPLETION_DIR/*.fish
        # mise exec gum -- gum log --level=debug "loading completion "(basename $cf)
        # TODO: log doesn't work?
        source < $cf
    end
end