Refactor xonsh config

xonsh/prompt.xsh

@@ -0,0 +1,25 @@
+# Fix prompt for Emacs TRAMP
+# https://github.com/oh-my-fish/theme-bobthefish/issues/148
+if $TERM == "dumb":
+    $PROMPT = "$ "
+    $RIGHT_PROMPT = None
+    $BOTTOM_TOOLBAR = None
+else:
+    $PROMPT = \
+        "{bg#2E3440}{RED}{localtime} " \
+        "{#5E6470}\ue0b1 {YELLOW}{user}{DEFAULT}@{GREEN}{hostname} " \
+        "{#5E6470}\ue0b1 {BLUE}{short_cwd} {DEFAULT}{env_name}{RESET}{#2E3440}\ue0b0\n" \
+        "{RESET}{INTENSE_GREEN}{prompt_end}{RESET} "
+
+# Color style to fix unreadable greys
+from xonsh.tools import register_custom_style
+ttm_style = {
+    # Put custom overrides here
+    # Discover list of styles by running "xonfig colors default"
+    # Discover default mappings by cross referencing
+    # https://github.com/xonsh/xonsh/blob/main/xonsh/style_tools.py
+    # and
+    # https://github.com/pygments/pygments/blob/master/pygments/styles/native.py
+}
+register_custom_style("ttm-style", ttm_style, base="native")
+$XONSH_COLOR_STYLE = "ttm-style"