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Dangerous theme

A theme for the 70s, makes fish even more powerful. It's equipped with a hell of a lot of nice functions and key bindings to speed up your workflow.

The philosophy behind dangerous theme:

  • Delimit the prompt lines clearly to the output.
  • Produce output only if it contains relevant information.
  • Show useful notifications within the prompt.
  • Equip the prompt with toggle commands in order to change its style interactively.
  • Store sessions in order to make frequently used commands quickly accessible.
  • Make navigation within the directory tree as easy as possible using bookmarks and a directory history without duplicates.
  • Make histories quickly accessible with menus.
  • Don't stress your eyes. Use different colors in dark and bright environments.

Screenshot

screenshot

Requirements

You need an up-to-date fish shell version from github or a nightly build.

Non standard tools:

Configuration

General configuration

It's crucial to have vi mode enabled. Thus, execute

set -U fish_key_bindings fish_vi_key_bindings

before enabling the theme.

Colors

Redefine $dangerous_colors with the set command in order to change the colors of the prompt.

Example:

set dangerous_colors 000000 333333 666666 ffffff ffff00 ff6600 ff0000 ff0033 3300ff 0000ff 00ffff
00ff00

Two color schemes for bright and dark environments are predefined. You can enable them with day and night, respectively.

Command history

Commands that shouldn't appear in the command history are defined by a universal list $dangerous_nocmdhist. Default:

set -U dangerous_nocmdhist c d ll ls m s

Disable/reenable greeting

Disable:

set -U dangerous_nogreeting

Reenable:

set -e dangerous_nogreeting

Outer prompt segments

  • Vi mode is indicated by color of outer segments, cursor color also changes if terminal supports it:
    • blue: NORMAL mode
    • yellow: INSERT mode
    • magenta: VISUAL mode

Left prompt segments

  • Prompt line number
  • Git repository information
  • Status symbols
    • ✻: keep track of this shell session, can be toggled with # to show the number of the session within the sessions list
    • ⌘: present working directory is in bookmark list, can be toggled with # to show the number of the bookmark
    • V: vi is parent process
    • R: ranger is parent process
    • ⚙: there are background jobs, can be toggled with # to show the amount of background jobs
    • : no write permissions in present working directory
    • ⚔: there are tasks scheduled for this week, can be toggled with # to show the amount of weekly tasks
    • ⚑: there are appointments for today, can be toggled with # to show the amount of appointments
    • ✔: last command succeeded, can be toggled with # to show the status value
    • ✘: last command failed, can be toggled with # to show the status value
    • ⚡: superuser indicator
  • Present working directory

Right prompt segments

  • Last command's duration time
  • Git status symbols:
    • ↑: git repository is ahead origin
    • ↓: git repository is behind origin
    • +: changes have been added to git index
    • –: files have been deleted in work tree
    • ✱: files have been modified in work tree
    • →: files have been renamed in git index
    • ═: there are unmerged commits
    • ●: there are untracked (new) files
    • ✭: there are stashed commits

Toggle prompt segments

The following shortcuts need vi-mode:

  • Style of segments can be toggled in NORMAL and in VISUAL mode with space bar

    • styles implemented for present working directory segment:
      • short (shows username, short hostname and truncated path; recommended in most cases)
      • long (shows username, full hostname and full path; useful for copy-paste in ssh connections)
      • none (shows nothing except small delimiter; useful for small terminals)
      • If prompt is toggled with #, the IP address is shown instead of the hostname.
    • configurable by universal list $dangerous_pwdstyle (if not set, defaults to short long none); note that changes to $dangerous_pwdstyle keep persistant as it's a universal variable.
    • The other segments are hidden in case $pwd_style is none.

  • Style of symbols can be toggled in NORMAL and in VISUAL mode with #

    • styles implemented:
      • symbols (shows status symbols)
      • numbers (shows numbers instead of symbols in left prompt as well as amount of changes in right git prompt)

Note, the format is username@hostname:pathname. Thus, you can cut the whole string with your mouse and paste it into ssh commands.

Quickly navigate in history of working directories

The function d drops down a menu showing the history as enumerated list. Unlike fish's builtin dirh, d does not show any duplicates. Enter a number to jump to a directory within the list.

The following shortcuts need vi-mode:

  • Press H in NORMAL mode to change present working directory to previous working directory in history.
  • Press L in NORMAL mode to change present working directory to next working directory in history.

Quickly navigate in command history

The function c drops down a menu showing the command history as enumerated list similarly to the d function. Selections are also pasted into the X clipboard. It's possible to load a command of a former prompt by giving the prompt line number as argument.

Bookmarks

A bookmark can be created with mark. It can be removed with unmark. Bookmarks are universal and thus persistant. A new shell automatically changes working directory on startup to newest bookmark. m is a function that drops down a menu showing the bookmarks as enumerated list equivalently to d.

The following shortcuts need vi mode:

  • Create a bookmark for present working directory with m in NORMAL mode.
  • Remove a bookmark for present working directory with M in NORMAL mode.

Edit commandline with your favorite editor

The function edit-commandline lets you edit the commandline with your editor. It makes the commandline as powerful as your editor. If $EDITOR is not set, vi is used.

The following shortcut needs vi mode:

  • Type . in NORMAL mode to edit commandline in editor.

Sessions

Shell session can be stored with s <session name>. If a session with session name already exists, the session with this name will be attached. If a session with session name is already active within another terminal, this terminal will be focussed.

A list of available sessions can be shown with s.

A session can be erased with s -e <session name>.

Type s -d to detach current session.

Set window title

Just type wt <title>.

TODO

  • vi REPLACE mode, as soon as REPLACE mode is implemented within fish

Feedback

Give me feedback if you ...

  • ... have ideas how I could improve dangerous.
  • ... have problems with dangerous.
  • ... have questions concerning dangerous.