tombl/README.md

## README.md

      
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              README.md
            
          
    Getting nvm support in the fish shell

How to get nvm to run inside the fish shell.
Step 0: Ensure fish and nvm are installed

See the following for instructions:
fish

nvm

Step 1: Install fisher

fisher is a package manager for fish.
It can be installed using the following command:
curl https://git.io/fisher --create-dirs -sLo ~/.config/fish/functions/fisher.fish

Step 2: Install bass

bass is a way to run bash scripts on fish.
It can be installed using the following command:
fisher add edc/bass

Step 3: Setup nvm with bass

Create a file at ~/.config/fish/functions/nvm.fish containing:
function nvm
    bass source ~/.nvm/nvm.sh --no-use ';' nvm $argv
end
replacing ~/.nvm/nvm.sh with your installation directory if installed in a non-standard location or by a package manager.
nvm is now working inside the fish shell.
Step 4 (optional but recommended): Calling nvm use automatically in a directory with a .nvmrc file

nvm provides scripts to allow nvm to have deeper integration into bash or zsh.
This is a port of the original zsh function by nvm to fish.
Put this into your ~/.config/fish/config.fish to call nvm use automatically whenever you
enter a directory that has contains, or has a parent directory that contains, an .nvmrc file with a string telling nvm which version of node to use:
function find_up
    set path (pwd)
    while test $path != "/"
        and not test -e "$path/$argv[1]"
        set path (dirname $path)
    end
    if test -e "$path/$argv[1]"
        echo $path
    else
        echo ""
    end
end

function __check_nvm --on-variable PWD
    if status --is-command-substitution
        return
    end

    set nvm_path (find_up ".nvmrc" | tr -d '[:space:]')

    if test "$nvm_path" != ""

        set nvmrc_node_version (nvm version (cat "$nvm_path/.nvmrc") '; 2>1')

        if test "$nvmrc_node_version" = "N/A"
            echo "Installing node version "(cat "$nvm_path/.nvmrc")
            nvm install
            set nvm_node_version (nvm version)
        else if test "$nvmrc_node_version" != (nvm version)
            echo "Changing node version to $nvmrc_node_version"
            nvm use
            set nvm_node_version (nvm version)
        end
        echo "$nvm_path/.nvmrc"
    else if test (nvm version) = "none"
        nvm use default --silent
    else if test (nvm version) != (nvm version default)
        echo "Reverting node version to default"
        nvm use default
    end
end

__check_nvm