dotfiles/nushell/env.nu

# Nushell Environment Config File
#
# version = "0.86.0"

def create_left_prompt [] {
    let home =  $nu.home-path

    # Perform tilde substitution on dir
    # To determine if the prefix of the path matches the home dir, we split the current path into
    # segments, and compare those with the segments of the home dir. In cases where the current dir
    # is a parent of the home dir (e.g. `/home`, homedir is `/home/user`), this comparison will
    # also evaluate to true. Inside the condition, we attempt to str replace `$home` with `~`.
    # Inside the condition, either:
    # 1. The home prefix will be replaced
    # 2. The current dir is a parent of the home dir, so it will be uneffected by the str replace
    let dir = (
        if ($env.PWD | path split | zip ($home | path split) | all { $in.0 == $in.1 }) {
            ($env.PWD | str replace $home "~")
        } else {
            $env.PWD
        }
    )

    # create a right prompt in magenta with green separators and am/pm underlined
    let time_color = ansi magenta_bold
    let time_segment = date now | format date ' [%H:%M] '

    let arrow_color = ansi magenta
    let first_line_arrow = "┌──"
    let second_line_arrow = "└▷"

    let username_color = ansi magenta_bold
    let username = $env.USER

    let delimiter_color = ansi yellow_bold
    let first_delimiter = "@"
    let second_delimiter = "::"

    let hostname_color = ansi green_bold
    let hostname = (sys).host.hostname

    let dir_color = ansi blue_bold
    let reset_ansi = ansi reset

    [
      $arrow_color
      $first_line_arrow
      $time_color
      $time_segment
      $username_color
      $username
      $delimiter_color
      $first_delimiter
      $hostname_color
      $hostname
      $delimiter_color
      $second_delimiter
      $dir_color
      $dir
      "\n"
      $reset_ansi
      $arrow_color
      $second_line_arrow
    ] | str join
}

def create_right_prompt [] {
    let last_exit_code = if ($env.LAST_EXIT_CODE != 0) {([
        (ansi red_bold)
        ($env.LAST_EXIT_CODE)
        " ↵ "
    ] | str join)
    } else {([
        (ansi green_bold)
        ($env.LAST_EXIT_CODE)
        " ↵ "
    ] | str join)
    }

    ([$last_exit_code] | str join)
}

# Use nushell functions to define your right and left prompt
$env.PROMPT_COMMAND = {|| create_left_prompt }
# FIXME: This default is not implemented in rust code as of 2023-09-08.
$env.PROMPT_COMMAND_RIGHT = {|| create_right_prompt }

# The prompt indicators are environmental variables that represent
# the state of the prompt
$env.PROMPT_INDICATOR = {|| "  " }
$env.PROMPT_INDICATOR_VI_INSERT = {|| ": " }
$env.PROMPT_INDICATOR_VI_NORMAL = {|| "> " }
$env.PROMPT_MULTILINE_INDICATOR = {|| "::: " }

# If you want previously entered commands to have a different prompt from the usual one,
# you can uncomment one or more of the following lines.
# This can be useful if you have a 2-line prompt and it's taking up a lot of space
# because every command entered takes up 2 lines instead of 1. You can then uncomment
# the line below so that previously entered commands show with a single `🚀`.
# $env.TRANSIENT_PROMPT_COMMAND = {|| "🚀 " }
# $env.TRANSIENT_PROMPT_INDICATOR = {|| "" }
# $env.TRANSIENT_PROMPT_INDICATOR_VI_INSERT = {|| "" }
# $env.TRANSIENT_PROMPT_INDICATOR_VI_NORMAL = {|| "" }
# $env.TRANSIENT_PROMPT_MULTILINE_INDICATOR = {|| "" }
# $env.TRANSIENT_PROMPT_COMMAND_RIGHT = {|| "" }

# Specifies how environment variables are:
# - converted from a string to a value on Nushell startup (from_string)
# - converted from a value back to a string when running external commands (to_string)
# Note: The conversions happen *after* config.nu is loaded
$env.ENV_CONVERSIONS = {
    "PATH": {
        from_string: { |s| $s | split row (char esep) | path expand --no-symlink }
        to_string: { |v| $v | path expand --no-symlink | str join (char esep) }
    }
    "Path": {
        from_string: { |s| $s | split row (char esep) | path expand --no-symlink }
        to_string: { |v| $v | path expand --no-symlink | str join (char esep) }
    }
}

# Directories to search for scripts when calling source or use
$env.NU_LIB_DIRS = [
    # FIXME: This default is not implemented in rust code as of 2023-09-06.
    ($nu.default-config-dir | path join 'scripts') # add <nushell-config-dir>/scripts
]

# Directories to search for plugin binaries when calling register
$env.NU_PLUGIN_DIRS = [
    # FIXME: This default is not implemented in rust code as of 2023-09-06.
    ($nu.default-config-dir | path join 'plugins') # add <nushell-config-dir>/plugins
]

# To add entries to PATH (on Windows you might use Path), you can use the following pattern:
# $env.PATH = ($env.PATH | split row (char esep) | prepend '/some/path')