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
  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

    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 d -print -o -type f -print -o -type l -print" \
    "-m"
}

_fzf_file_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

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

# File
for cmd in "
  awk cat diff diff3
  emacs ex file ftp g++ gcc gvim head hg java
  javac ld less more mvim patch perl python ruby
  sed sftp sort source tail tee uniq vi view vim wc"; do
  complete -F _fzf_file_completion -o default $cmd
done

# Anything
for cmd in "
  basename bunzip2 bzip2 chmod chown curl cp dirname du
  find git grep gunzip gzip hg jar
  ln ls mv open rm rsync scp
  svn tar unzip zip"; do
  complete -F _fzf_all_completion -o default $cmd
done

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