Changed . token to _dot

This change allows the dotfiles to work with chezmoi (e.g: on windows)
and improves grepability with neovim/telescope

dot_config/nushell/nu_scripts/example-config/config.nu

@@ -0,0 +1,13 @@
+# ~/.config/nushell/config.nu
+#
+# Nushell-s config file used in engine-q.
+#
+# It fetches all definitions and environment variables from the `init` module.
+
+def build-config [] { { footer_mode: "50" } }
+
+let config = build-config
+
+use ~/.config/nushell/init.nu *
+
+alias gd = git diff

dot_config/nushell/nu_scripts/example-config/init.nu

@@ -0,0 +1,55 @@
+# ~/.config/nushell/init.nu
+#
+# Init module that exports commands and environment variables wanted at startup
+
+# commands
+export def egd [...rest] {
+    with-env [GIT_EXTERNAL_DIFF 'difft'] { git diff $rest }
+}
+
+# we need to export the env we create with load-env
+# because we are `use`-ing here and not `source`-ing this file
+export-env {
+    load-env {
+        BROWSER: "firefox"
+        CARGO_TARGET_DIR: "~/.cargo/target"
+        EDITOR: "nvim"
+        VISUAL: "nvim"
+        PAGER: "less"
+        SHELL: "~/.cargo/bin/nu"
+        JULIA_NUM_THREADS:  nproc
+        HOSTNAME:  (hostname | split row '.' | first | str trim)
+        SHOW_USER: true
+        LS_COLORS: ([
+             "di=01;34;2;102;217;239"
+             "or=00;40;31"
+             "mi=00;40;31"
+             "ln=00;36"
+             "ex=00;32"
+        ] | str join (char env_sep))
+    }
+}
+
+# prompt
+PROMPT_COMMAND: { build-prompt }
+
+export def build-prompt [] {
+    let usr_str = (if $env.SHOW_USER {
+        [
+            $env.USER
+            '@'
+            $env.HOSTNAME
+            ':'
+        ] | str join
+    } else {
+        ''
+    })
+
+    let pwd_str = (if (pwd | str starts-with $env.HOME) {
+        (pwd | str replace $env.HOME '~' | str trim)
+    } else {
+        pwd
+    })
+
+    [ $usr_str $pwd_str ' ' ] | str join
+}