Direnv helper to load extra nixpkgs into the environment

15-direnv.fish

if upfind .envrc >/dev/null; and command -q direnv; and not set -q DIRENV_DIR
    # Do an early load of env vars so that things like XDG_DATA_DIRS can take effect
    direnv export fish | source
    # Then re-exec fish for $__fish_data_dir/config.fish to pick up the vars
    # https://fishshell.com/docs/3.7/language.html#configuration-files
    # So far this seems to be the only option to pick up .direnv/ files...
    exec fish

    # TODO: PWD var hook to exec again for unsetting XDG_DATA_DIRS
    # Possible inspiration: https://github.com/direnv/direnv/issues/73#issuecomment-747646730
end

direnvrc

#!/usr/bin/env bash

use_pkgs() {
    pkgs=()
    for pkg in "$@"; do
        if [[ "$pkg" = *#* || "$pkg" = *:* ]]; then
            pkgs+=("$pkg")
        else
            pkgs+=("nixpkgs#${pkg}")
        fi
    done
    direnv_load nix shell "${pkgs[@]}" --command "$direnv" dump
}

layout_fish() {
    local data_dir
    data_dir=$(direnv_layout_dir)/share

    # TODO: maybe export these as vars or helper functions
    local func_dir=$data_dir/fish/vendor_functions.d
    mkdir -p "$func_dir"
    local comp_dir=$data_dir/fish/vendor_completions.d
    mkdir -p "$comp_dir"
    local conf_dir=$data_dir/fish/vendor_conf.d
    mkdir -p "$conf_dir"

    export XDG_DATA_DIRS
    if [[ "$XDG_DATA_DIRS" != *"$data_dir"* ]];  then
        XDG_DATA_DIRS="$data_dir:$XDG_DATA_DIRS"
    fi
}

fish_alias() {
    layout_fish

    local name=$1
    local func_dir
    func_dir=$(direnv_layout_dir)/share/fish/vendor_functions.d

    fish --no-config -c "alias \$argv && funcsave -d '$func_dir' '$name'" -- "$@"
}


# vim:ft=bash