fzf/fzf-completion.bash

#!/bin/bash
#     ____      ____
#    / __/___  / __/
#   / /_/_  / / /_
#  / __/ / /_/ __/
# /_/   /___/_/-completion.bash
#
# - $FZF_COMPLETION_TRIGGER (default: '**')
# - $FZF_COMPLETION_OPTS    (default: empty)

_fzf_opts_completion() {
  local cur prev opts
  COMPREPLY=()
  cur="${COMP_WORDS[COMP_CWORD]}"
  prev="${COMP_WORDS[COMP_CWORD-1]}"
  opts="-m --multi -x --extended -s --sort +s +i +c --no-color"

  case "${prev}" in
  --sort|-s)
    COMPREPLY=( $(compgen -W "$(seq 2000 1000 10000)" -- ${cur}) )
    return 0
    ;;
  esac

  if [[ ${cur} =~ ^-|\+ ]]; then
    COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
    return 0
  fi

  return 0
}

_fzf_generic_completion() {
  local cur prev opts base matches ignore
  COMPREPLY=()
  FZF_COMPLETION_TRIGGER=${FZF_COMPLETION_TRIGGER:-**}
  cur="${COMP_WORDS[COMP_CWORD]}"
  prev="${COMP_WORDS[COMP_CWORD-1]}"
  if [[ ${cur} == *"$FZF_COMPLETION_TRIGGER" ]]; then
    base=${cur:0:${#cur}-${#FZF_COMPLETION_TRIGGER}}
    base=${base%/}
    eval base=$base

    ignore=${FZF_COMPLETION_IGNORE:-*/.git/*}
    find_opts="-name .git -prune -o -name .svn -prune -o"
    if [ -z "$base" -o -d "$base" ]; then
      matches=$(find ${base:-*} $1 2> /dev/null | fzf $FZF_COMPLETION_OPTS $2 | while read item; do
        if [[ ${item} =~ \  ]]; then
          echo -n "\"$item\" "
        else
          echo -n "$item "
        fi
      done)
      matches=${matches% }
      if [ -n "$matches" ]; then
        COMPREPLY=( "$matches" )
        return 0
      fi
    fi
  fi
}

_fzf_all_completion() {
  _fzf_generic_completion \
    "-name .git -prune -o -name .svn -prune -o -type f -print -o -type l -print" \
    "-m"
}

_fzf_dir_completion() {
  _fzf_generic_completion \
    "-name .git -prune -o -name .svn -prune -o -type d -print" \
    ""
}

complete -F _fzf_opts_completion fzf

for cmd in "cd pushd rmdir"; do
  complete -F _fzf_dir_completion -o default $cmd
done

_FZF_COMPLETION_COMMANDS=${FZF_COMPLETION_COMMANDS:-
  awk basename bunzip2 bzip2 cat chmod chown curl cp diff diff3 dirname du
  emacs ex file find ftp g++ gcc git grep gunzip gvim gzip head hg jar java
  javac jps ld less ln ls more mv mvim open patch perl python rm rsync ruby scp
  sed sftp sort source svn tail tar tee uniq unzip vi view vim wc zip
}

for cmd in $_FZF_COMPLETION_COMMANDS; do
  complete -F _fzf_all_completion -o default $cmd
done
unset _FZF_COMPLETION_COMMANDS

bind '"\e\e": complete'
bind '"\er": redraw-current-line'
bind '"\C-i": "\e\e\er"'