Allowing the configure_shell_profile function to make directories

[Frizzus]

Motivation

After installing Nix using the recommended method, I noticed that nix commands were not available in my shell.

Context

Similar to this issue i'm using Solus linux ( Solus-Budgie-Release-2025-01-26 ).
When configuring shells the configure_shell_profile() function will try to configure nix at several places :

• /etc/bashrc
• /etc/profile.d/nix.sh
• /etc/zshrc
• /etc/bash.bashrc
• /etc/zsh/zshrc

This has been added in the following commit by @abathur.
However, the code does not create directories if it's missing, it's assuming that /etc/ /etc/profile.d/ and /etc/zsh/ exists.

Unfortunately in Solus linux the /etc/profile.d/ directory does not exist.
It becomes a problem because solus linux's user .bashrc only source the /etc/profile file.

default ~/.bashrc

source /usr/share/defaults/etc/profile

The sourced file will source the /etc/profile.d/ directory if it exists.

/usr/share/defaults/etc/profile

if [ -d /usr/share/defaults/etc/profile.d ] ; then
    for script in /usr/share/defaults/etc/profile.d/*.sh; do
        if [ -r $script ] ; then
            source $script
        fi
    done
    unset script
fi

if [ -d /etc/profile.d ] ; then
    for script in /etc/profile.d/*.sh; do
        if [ -r $script ] ; then
            source $script
        fi
    done
    unset script
fi

So to set up the shell of solus linux's user, the install script must create at least the profile.d directory.

PS : I'm struggling to find a way to make test for this.
The test tool seems to automatically create /outputs/out/etc/profile.d before testing the install script.