fzf-scripts/fv

#!/usr/bin/env bash

declare esc=$'\033'
declare c_reset="${esc}[0m"
declare c_red="${esc}[31m"

err() {
  printf "${c_red}%s${c_reset}\n" "$*" >&2
}

die() {
  [[ -n "$1" ]] && err "$1"
  exit 1
}

has() {
  local verbose=false
  if [[ $1 == '-v' ]]; then
    verbose=true
    shift
  fi
  for c in "$@"; do c="${c%% *}"
    if ! command -v "$c" &> /dev/null; then
      [[ "$verbose" == true ]] && err "$c not found"
      return 1
    fi
  done
}

usage() {
  more <<'HELP'
fv [OPTIONS] [SEARCH]
fuzzy file filtering and command executing

-c    command to execute [defaults to vim]
-a    search all dirs and hidden files (still quirky)
-d    detach from terminal via nohup
HELP
}

set_cmd() {
   if has "$1"; then
    cmd="$1"
  else
    die "$1 is not a valid command"
  fi
}

declare cmd='vim'
declare cmdopts=()
declare searchstr=''
declare searchcmd=''
declare searchopts=()
declare allfiles=0

while getopts "hadlc:" opt; do
  case "$opt" in
    h) usage; exit 0        ;;
    a) allfiles=1           ;;
    c) set_cmd "$OPTARG"     ;;
    d) unset detach         ;;
    l) searchopts+=( '-l' ) ;;
  esac
done
shift "$((OPTIND-1))"

has -v 'fzf' || die

for c in 'ag' 'ack' 'grep'; do
  if has "$c"; then
    searchcmd="$c"
    break
  fi
done

if [[ $searchcmd  == 'grep' ]]; then
  err 'grep is slow, you should strongly consider installing ag or ack'
  sleep .5
fi

if [[ -n "$1" ]]; then
  if [[ -d "$1" ]]; then
    searchopts+=( "$1" )
  else
    searchstr="$1"
  fi
  shift
fi

case "$searchcmd" in
  'ag')
    searchopts+=( '--color' )
    if [[ "$allfiles" == 1 ]]; then
      searchopts+=( '-u' '--hidden' )
    fi
    if [[ "$searchstr" == '' ]]; then
      searchopts+=( '-l' )
    fi
    ;;
  'ack')
    if [[ "$searchstr" == '' ]]; then
      if [[ "$allfiles" == 0 ]]; then
        searchopts+=( '-g' '^[^\.]' )
      else
        searchopts+=( '-f' )
      fi
    else
      searchopts+=( '-l' )
    #   searchopts+=( '--match' )
    fi
    ;;
  'grep')
    searchopts+=( '-r' '-I' )
    if [[ "$allfiles" == 0 ]]; then
      searchopts+=( '--exclude-dir=bower_components' )
      searchopts+=( '--exclude-dir=node_modules' )
      searchopts+=( '--exclude-dir=jspm_packages' )
      searchopts+=( '--exclude-dir=.cvs' )
      searchopts+=( '--exclude-dir=.git' )
      searchopts+=( '--exclude-dir=.hg' )
      searchopts+=( '--exclude-dir=.svn' )
    fi
    if [[ "$searchstr" == '' ]]; then
      searchopts+=( '' )
    fi
    ;;
esac

if [[ "$searchstr" != '' ]]; then
  searchopts+=( "$searchstr" )
fi

choices=$($searchcmd "${searchopts[@]}" 2> /dev/null |
  fzf --ansi --cycle --multi) || exit 1

if [[ "$searchstr" != '' ]]; then
  if [[ $searchcmd == 'ag' ]]; then
    choices=$(cut -d: -f1 <<< "$choices")
  fi
fi

mapfile -t choices <<< "$choices"

$cmd ${cmdopts[*]} "${choices[@]}"