Ble.sh

Bash Line Editor (ble.sh) is a command line editor written in pure Bash which replaces the default GNU Readline.

Features :

• Syntax highlighting: Highlight command lines input by users as in fish and zsh-syntax-highlighting. Unlike the simple highlighting in zsh-syntax-highlighting, ble.sh performs syntactic analysis to enable the correct highlighting of complex structures such as nested command substitutions, multiple here documents, etc. Highlighting colors and styles are fully configurable.

• Enhanced completion: Extend completion by syntax-aware completion, completion with quotes and parameter expansions in prefix texts, ambiguous candidate generation, etc. Also, menu-complete supports selection of candidates in menu (candidate list) by cursor keys, TAB and S-TAB. The feature auto-complete supports the automatic suggestion of completed texts as in fish and zsh-autosuggestions (with Bash 4.0+). The feature menu-filter integrates automatic filtering of candidates into menu completion (with Bash 4.0+). There are other functionalities such as dabbrev and sabbrev like zsh abbreviations or zsh-abbr.

• Vim editing mode: Enhance readline's vi editing mode available with set -o vi. Vim editing mode supports various vim modes such as char/line/block visual/select mode, replace mode, command mode, operator pending mode as well as insert mode and normal mode. Vim editing mode supports various operators, text objects, registers, keyboard macros, marks, etc. It also provides vim-surround as an option.

• Other interesting features include status line, history share, right prompt, transient prompt, xterm title, etc.

Note: ble.sh does not provide specific settings of the prompt, aliases, functions, etc. ble.sh provides a more fundamental infrastructure so that users can set up their own prompt, aliases, functions, etc. Of course ble.sh can be used in combination with other Bash configurations such as bash-it and oh-my-bash.