fzaur

#!/usr/bin/env bash

declare -A aliases
declare -A helptext
declare -r c_reset=$(tput sgr0)
declare -r c_red=$(tput setaf 1)
declare -r c_green=$(tput setaf 2)
declare -r c_yellow=$(tput setaf 3)
declare -r c_grey=$(tput setaf 8)

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

die() {
  if (( $# > 0 )); then
    err "$@"
  fi
  exit 1
}

has() {
  local v c
  if [[ $1 = '-v' ]]; then
    v=1
    shift
  fi
  for c; do c="${c%% *}"
    if ! command -v "$c" &> /dev/null; then
      (( v > 0 )) && err "$c not found"
      return 1
    fi
  done
}

aliases[h]=help
aliases[-h]=help
aliases[--help]=help
helptext[help]='show this help'
subcmd_help() {
  local formattedhelptext

  formattedhelptext=$(for c in "${subcmds_avail[@]}"; do
    printf "  %s\n    %s\n" "$c" "${helptext[$c]}"
  done)
  LESS=-FEXR less <<-HELP
$0 <COMMAND>

${formattedhelptext}
HELP
}

aliases[s]=search
aliases[-s]=search
helptext[search]='search packages on arch user repositories'
subcmd_search() {
  local q="$*" choices
  # local search_cmd='curl -s https://www.archlinux.org/packages/search/json/ | jq -r ".results[] | select(.Name | contains(\"{q}\")) | .Name"'
  local url_search='https://aur.archlinux.org/rpc/v5/search/'
  local jq_package_listing=".results | sort_by(.NumVotes) | reverse[] | \"${c_yellow}\(.Name)${c_grey} - \(if .OutOfDate then \"${c_red}[out of date] \" else \"\" end)${c_green}▲\(.NumVotes)${c_grey} - ${c_reset}\(.Description)\""

  local url_info='https://aur.archlinux.org/rpc/v5/info?arg[]='
  local jq_package_info='.results[]'

  local cmd_search="curl -sL '${url_search}{q}' | jq -r '$jq_package_listing'"
  mapfile -t choices < <(fzf -m --phony --query="$q" \
    --preview="curl -sL '${url_info}{1}' | jq -C '$jq_package_info'" \
    --bind=change:"reload(${cmd_search})" \
    --bind=start:"reload(${cmd_search})" | awk '{print $1}')

  (( ${#choices[@]} < 1 )) && exit 0
  clone_package "${choices[0]}"
}

clone_package() {
  local pkg="$1" url
  if [[ $pkg != http* ]]; then
    url="https://aur.archlinux.org/${pkg}"
  fi
  # TODO: make this configurable
  local clonedir=~/.cache/fzaur
  if [[ ! -d "$clonedir/$pkg" ]]; then
    mkdir -p "$clonedir"
  fi
  cd "$clonedir" || die "failed to mkdir $clonedir"
  if [[ -d "$pkg" ]]; then
    cd "$pkg" 2> /dev/null || die 'failed to cd into package'
    if [[ ! -d .git ]]; then
      die "$clonedir/$pkg already exists but is not a git repo"
    fi
    git pull
  else
    git clone "$url" || die 'failed to clone package'
    cd "$pkg" 2> /dev/null || die 'failed to clone package'
  fi
  $EDITOR $PWD/PKGBUILD
  read -r -n 1 -p "press y to run ${c_green}makepkg -si${c_reset} or any other key to abort: "
  [[ $REPLY != y ]] && exit 1
  makepkg -si
}

has -v fzf jq curl || die

mapfile -t subcmds_avail < <(compgen -A function | awk '/^subcmd_/ { sub(/^subcmd_/, "", $0); print }')

nocmd() {
  local cmd=$(for c in "${subcmds_avail[@]}"; do
    printf "$c\t${help}\t${helptext[$c]}\n"
  done)
  local choice=$(<<< "$cmd" column -t -s $'\t' | fzf | awk '{print $1}')
  if [[ -z $choice ]]; then exit 1; fi
  subcmd_$choice
}

if (( $# < 1 )); then
  nocmd
  exit 1
elif has "subcmd_$1"; then
  subcmd="subcmd_$1"
  shift
  "$subcmd" "$@"
elif [[ -v aliases[$1] ]]; then
  subcmd=subcmd_${aliases[$1]}
  shift
  "$subcmd" "$@"
else
  echo "unknown command \"$1\""
  subcmd_help
  exit 1
fi