Revise paste Quick Install Termux with adb on Android

#!/bin/bash
###################################################################### 
#Copyright (C) 2023  Kris Occhipinti
#https://filmsbykris.com

#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation version 3 of the License.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.

#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.
######################################################################

function error(){
  echo $*
  exit 1
}

function get_apk(){
  [[ "$1" ]] || exit 1
  app="$1"
  url="https://f-droid.org/en/packages/$app/"
  search="https://f-droid.org/repo/com"
  url="$(wget -qO- "$url"|grep "$search"|grep '.apk'|head -n1|cut -d\" -f2)"
  [[ $url ]] || error fail 
  apk="$(basename $url)"
  wget -c "$url"
  adb install -g "$apk"
}

adb get-state || error "No Devices Connected"
get_apk com.termux
adb shell am start -a android.intent.action.MAIN -n com.termux/.app.TermuxActivity
get_apk com.termux.api
get_apk com.termux.boot
adb shell am start -a android.intent.action.MAIN -n com.termux.boot/.BootActivity