├── README.md
└── fzf-simple-completion.sh


/README.md:
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 1 | # Fzf simple completion
 2 | Pipe bash tab-completion suggestions into ``fzf`` fuzzy finder
 3 | 
 4 | <a href="https://asciinema.org/a/675226" target="_blank"><img src="https://asciinema.org/a/675226.svg" width=75%/></a>
 5 | 
 6 | ## Prerequisites
 7 | - [fzf](https://github.com/junegunn/fzf) (command-line fuzzy finder)
 8 | - [bash-completion](https://github.com/scop/bash-completion) (most Linux distros ship ``bash-completion`` by default, so there is less chance you will have to install it)
 9 | 
10 | ## Quick start
11 | Source ``fzf-simple-completion.sh`` at the end of your ``.bashrc``. For example:
12 | ```sh
13 | source ~/path/fzf-simple-completion.sh
14 | ```
15 | This will replace the default bash completion by fzf selection menu whenever you hit ``TAB``.
16 | ## Features
17 | - Commands and arguments completion
18 | - Directories shortening 
19 | - Color support
20 | ## How does it work?
21 | This project is motivated by [Accessing tab-completion programmatically in Bash](https://brbsix.github.io/2015/11/29/accessing-tab-completion-programmatically-in-bash/). You may find some alternatives on Github as well, but the implementations looks overwhelming to me (I'm not a bash guru so I want to keep things as clean and manageable as possible).
22 | 
23 | The idea this project works on is straightforward: 
24 | - Pipe all suggestions from ``bash-completion`` directly into ``fzf`` for easy search and selection.
25 | 
26 | There is an extra work to make the complettion handle directories with spaces, shortening paths, and coloring. The script itself is written in just a few lines of code, making it easy to modify and customize as needed.
27 | 
28 | 
29 | 
30 | 
31 | 


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/fzf-simple-completion.sh:
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 1 | #!/usr/bin/env bash
 2 | 
 3 | # FZF SIMPLE COMPLETION - Pipe bash tab-completion suggestions into fzf fuzzy finder
 4 | # More details at https://github.com/duong-db/fzf-simple-completion
 5 | 
 6 | bind '"\e[0n": redraw-current-line' 
 7 | export FZF_DEFAULT_OPTS="--bind=tab:down --bind=btab:up --cycle"
 8 | 
 9 | _fzf_command_completion() {
10 |     [[ -z "${COMP_LINE// /}" || $COMP_POINT -ne ${#COMP_LINE} ]] && return
11 |     COMPREPLY=$(
12 |         # Use compgen for commands completion
13 |         compgen -c -- "${COMP_WORDS[COMP_CWORD]}" 2>/dev/null | LC_ALL=C sort -u |
14 |         fzf --reverse --height 12 --select-1 --exit-0
15 |     )
16 |     printf '\e[5n'
17 | }
18 | 
19 | _fzf_get_argument_list() {
20 |     local _command command=${COMP_LINE%% *}
21 |     source /usr/share/bash-completion/bash_completion
22 |     _command=$(complete -p "$command" 2>/dev/null | awk '{print $(NF-1)}')
23 |     
24 |     if [[ -z $_command ]]; then 
25 |         # Load completion using _completion_loader from bash_completion script
26 |         _completion_loader "$command"
27 |         _command=$(complete -p "$command" 2>/dev/null | awk '{print $(NF-1)}')
28 |     fi
29 |     "$_command" 2>/dev/null
30 | 
31 |     # Add color
32 |     for i in "${!COMPREPLY[@]}"; do
33 |         # "~/Documents" is not recognized as a directory due to quotes so we need to expand tilde
34 |         if [[ -e "${COMPREPLY[i]/#~/$HOME}" ]]; then
35 |             COMPREPLY[i]=$(ls -F -d --color=always "${COMPREPLY[i]/#~/$HOME}" 2>/dev/null)
36 |         fi
37 |     done
38 |     printf '%s\n' "${COMPREPLY[@]}" | LC_ALL=C sort -u | LC_ALL=C sort -t '.' -k2
39 | }
40 | 
41 | _fzf_argument_completion() {
42 |     [[ $COMP_POINT -ne ${#COMP_LINE} ]] && return
43 |     local fzf_opts="--ansi --reverse --height 12 --select-1 --exit-0"
44 | 
45 |     # Hack on directories completion
46 |     # - Only display the last sub directory for fzf searching
47 |     #     Example. a/b/c/ -> a//b//c/ -> c/
48 |     # - Handle the case where directory contains spaces
49 |     #     Example. New Folder/ -> New\ Folder/
50 |     # - Revert $HOME back to tilde
51 |     COMPREPLY=$(
52 |         _fzf_get_argument_list |
53 |         sed 's|/|//|g; s|/$||' | fzf $fzf_opts -d '//' --with-nth='-1..' | sed 's|//|/|g' |
54 |         sed 's| |\\ |g; s|\\ $| |' |
55 |         sed "s|^$HOME|~|"
56 |     )
57 |     printf '\e[5n'
58 | }
59 | 
60 | # Remove default completions
61 | complete -r
62 | 
63 | # Set fuzzy completion
64 | complete -o nospace -I -F _fzf_command_completion
65 | complete -o nospace -D -F _fzf_argument_completion
66 | 
67 | # Turn off case sensitivity for better user experience
68 | bind 'set completion-ignore-case on'


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