Add fish config

etc/fish/config.fish

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+set -g fish_greeting

etc/fish/functions/fish_prompt.fish

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+function fish_prompt
+  set -l last_status "$status"
+  set -l tty (tty)
+
+  # autostart sway on tty1
+  if test "$tty" = "/dev/tty1"
+      command sway
+  end
+
+  # show last exit code if != 0
+  if test "$last_status" -gt 0
+    set_color red
+    printf '%s ' "$last_status"
+  end
+
+  # show hostname on ssh connection
+  if test -n "$SSH_CLIENT"
+    set_color brblack
+    set -l host (uname -n)
+    printf '[%s] ' $host
+  end
+
+  # username
+  if test $USER = "root"
+    set_color -o brred
+    printf '\x24 '
+  else
+    set_color -o brblue
+    printf '\x25 '
+  end
+
+  set_color normal
+end

etc/fish/functions/fish_right_prompt.fish

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+function fish_command_timer_compute_cmd_duration_str
+  if [ $CMD_DURATION -lt 10000 ]
+    return
+  end
+
+  set -l SEC 1000
+  set -l MIN 60000
+  set -l HOUR 3600000
+  set -l DAY 86400000
+
+  set -l num_days (math -s0 "$CMD_DURATION / $DAY")
+  set -l num_hours (math -s0 "$CMD_DURATION % $DAY / $HOUR")
+  set -l num_mins (math -s0 "$CMD_DURATION % $HOUR / $MIN")
+  set -l num_secs (math -s0 "$CMD_DURATION % $MIN / $SEC")
+  set -l cmd_duration_str ""
+  if [ $num_days -gt 0 ]
+    set cmd_duration_str {$cmd_duration_str}{$num_days}"d "
+  end
+  if [ $num_hours -gt 0 ]
+    set cmd_duration_str {$cmd_duration_str}{$num_hours}"h "
+  end
+  if [ $num_mins -gt 0 ]
+    set cmd_duration_str {$cmd_duration_str}{$num_mins}"m "
+  end
+  set cmd_duration_str {$cmd_duration_str}{$num_secs}s
+  printf '%s ' $cmd_duration_str
+end
+
+function fish_right_prompt
+  set_color brblack
+  fish_command_timer_compute_cmd_duration_str
+
+  set_color green
+  printf '%s ' (prompt_pwd)
+  set_color normal
+end