nushell-config/env.nu

# Nushell Environment Config File
#
# version = "0.90.1"

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
        }
    )

    let path_color = (if (is-admin) { ansi red_bold } else { ansi green_bold })
    let separator_color = (if (is-admin) { ansi light_red_bold } else { ansi light_green_bold })
    let path_segment = $"($path_color)($dir)"

    $path_segment | str replace --all (char path_sep) $"($separator_color)(char path_sep)($path_color)"
}

def create_right_prompt [] {
    # create a right prompt in magenta with green separators and am/pm underlined
    let time_segment = ([
        (ansi reset)
        (ansi magenta)
      (date now | format date '[%H:%M:%S]') # try to respect user's locale
    ] | str join | str replace --regex --all "([/:])" $"(ansi green)${1}(ansi magenta)" |
        str replace --regex --all "([AP]M)" $"(ansi magenta_underline)${1}")

    let last_exit_code = if ($env.LAST_EXIT_CODE != 0) {([
        (ansi rb)
        ($env.LAST_EXIT_CODE)
    ] | str join)
    } else { "" }

    ([$last_exit_code, (char space), $time_segment] | str join)
}

def is-container [] {
  ($env.container? | describe) == "string"
}

def create_user_host [] {
  let user_host = (ansi red) + (whoami) + (ansi reset) + '@' + (ansi blue) + (sys | get host.hostname) + (ansi reset)
  let container_segment = (ansi green_bold) + "⬢ " + (ansi reset)
  let user_host_segment = (if (is-container) { ($container_segment + $user_host) | str join } else { $user_host })

  ([$user_host_segment, ":", (create_left_prompt)] | str join)
}


# Use nushell functions to define your right and left prompt
$env.PROMPT_COMMAND = {|| create_user_host }
# 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 = {|| "::: " }

# 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
# The default for this is $nu.default-config-dir/scripts
$env.NU_LIB_DIRS = [
    ($nu.default-config-dir | path join 'scripts') # add <nushell-config-dir>/scripts
]

# Directories to search for plugin binaries when calling register
# The default for this is $nu.default-config-dir/plugins
$env.NU_PLUGIN_DIRS = [
    ($nu.default-config-dir | path join 'plugins') # add <nushell-config-dir>/plugins
]

# Doom Emacs
$env.DOOMDIR = ($env.HOME | path join 'sync/doom')

# 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')