add nushell config

shell/.config/nushell/env.nu

@@ -0,0 +1,108 @@
+# Nushell Environment Config File
+#
+# version = "0.89.0"
+
+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
+        }
+    )
+
+    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)"
+
+    let base = $path_segment | str replace --all (char path_sep) $"($separator_color)(char path_sep)($path_color)"
+    let branch = do { git rev-parse --abbrev-ref HEAD } | complete
+    if $branch.exit_code == 0 {
+        $"($base) ($separator_color)\((ansi magenta)($branch.stdout | str trim)($separator_color)) "
+    } else {
+        $base
+    }
+}
+
+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 '%x %X %p') # 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), $time_segment] | str join)
+}
+
+# Use nushell functions to define your right and left prompt
+$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
+# 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
+]
+
+# 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')
+