raldone01 / fish__main__

__main__ in fish

Exsisting issue fish-shell/fish-shell#4877

Problem statement

Find a way to check whether the current .fish file has been directly executed or if it was sourced.

Why

This allows one to write scripts that can be directly called like scripts or sourced to be made available as commands for repeated/later use.

3.6.1 working solution

if string match -q -- "*from sourcing file*" (status)
    echo "file was sourced"
else
    echo "file was not sourced"
end

Current partly working solution

#!/bin/fish
function hello_world --description "Print hello world"
    echo "Hello world"
end

if test ! (status current-command) = source
    hello_world $argv
end

echo DEBUG "$_" CURRENT (status current-command)

This works fine and can differentiate between being sourced and run directly. However the source detection doesn't work when it is sourced by ~/.config/fish/config.fish.

Reproduce

Requirements

• buildah
• docker or podman

Setup env

> ./build_docker.fish
> podman run --rm -it fish-main # can also just replace podman with docker

Observe how Hello world is being printed upon launching the fish shell/container.

C> source /root/.config/fish/my_functions/hello_world.fish

Hello world won't be printed as expected.

C> /root/.config/fish/my_functions/hello_world.fish

Hello world will be printed as expected. (Twice?!?)

C> exit

> source config.fish

Hello world won't be printed as expected.

> source my_functions/hello_world.fish

Hello world won't be printed as expected.

./my_functions/hello_world.fish

Hello world will be printed as expected.

Infinite loop?

I added a section to the config.fish that directly runs the hello_world file. It creates an infinite loop. I am not sure why this happens.