Broke down steps into functions. Completed install routines. Added sh…

…a256 check to curl & wget install methods. Linked the option to immediately run the YTDL assistant upon successful install of youtube-dl.

easy-ytdl.sh

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+#!/usr/bin/env bash
+###################################################################################
+# Easy-YouTube-DL #
+# #
+# The goals of this Easy-YouTube-DL script are: #
+# #
+# 1) To have a thinly veiled excuse to learn and practice as many #
+# bash scripting concepts as I can force into what started as #
+# a six line script that probably should have stayed that way. #
+# #
+# 2) Maybe actually assist users who are CLI-phobic, primarily on #
+# macOS, to download, install, and use youtube-dl with as #
+# little, or as simple, command line interaction as possible. #
+# #
+# 3) Finally publish some original code in open source for public #
+# benefit, constructive critique, or vehement ridicule. #
+# #
+# CHANGE HISTORY: #
+# 2022-09-16 Broke down steps into functions. Completed install routines. #
+# Added sha256 check to curl & wget install methods. #
+# Linked the option to immediately run the YTDL assistant #
+# upon successful install of youtube-dl. #
+# 2022-09-10 Massive mission scope bloat. Added GPLv3 License. #
+# 2022-09-06 Original release. #
+# #
+###################################################################################
+###################################################################################
+# #
+# Copyright (C) 2022, Matt Bailey #
+# [email protected] #
+# #
+# 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; either version 3 of the License, or #
+# (at your option) any later version. #
+# #
+# 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 <https://www.gnu.org/licenses/>. #
+# #
+###################################################################################
+###################################################################################
+
+# Define ANSI color code variables
+NOCOLOR=$'\e[0m'
+WHITE=$'\e1;37m'
+GRAY=$'\e[0;37m'
+RED=$'\e[0;31m'
+YELLOW=$'\e[0;33m'
+BLUE=$'\e[1;34m'
+GREEN=$'\e[0;32m'
+CYAN=$'\e[0;36m'
+PURPLE=$'\e[0;35m'
+YINVERT=$'\e[43;30m'
+
+# Define URL variables for tricky printf formatting.
+YTCOM='youtube.com'
+YTBE='youtu.be'
+
+function test_youtube_dl () {
+ if ! command -v youtube-dl &> /dev/null ; then
+ # We don't have it. Do we have Python as a requirement?
+ $test_python
+ else
+ $run_easy_ytdl
+ fi
+}
+
+function test_python () {
+ if ! command -v python &> /dev/null ; then
+ # We also don't have python. Prompt for Python install.
+ echo "Sorry, Python 2.6 or later is a requirement for youtube-dl and this system doesn't have it"
+ read -p "Do you want to install it from www.python.org and try again? (yes/no): " "get_python"
+ case $get_python in
+ y|Y|yes|Yes|YES) open "https://www.python.org/downloads/"
+ ;;
+ *) exit 0
+ ;;
+ esac
+ else
+ # We've confirmed Python is present. Can we write to the default install location?
+ if -w /usr/local/bin ; then
+ echo "Sorry, youtube-dl could not be found. Would you like to download and install it?"
+ read -p "(yes/no): " "get_youtube_dl"
+ case "$get_youtube_dl" in
+ y|Y|yes|Yes|YES) echo "Proceeding..."
+ $test_install_methods
+ ;;
+ *) exit 0
+ ;;
+ esac
+ else
+ echo "Sorry, the user $USER is not able to write to the install location at /usr/local/bin."
+ fi
+ fi
+}
+
+function test_install_methods () {
+if ! command -v brew &> /dev/null; then
+ # We don't have Homebrew as the easiest install option.
+ if ! command -v curl &> /dev/null ; then
+ # We can't use curl to install.
+ if ! command -v wget &> /dev/null ; then
+ # We also can't use wget to install.
+ if ! command -v pip &> /dev/null ; then
+ printf '%s\n' "Sorry, we seem to have none of four possible install methods."
+ printf '%s\n' "Please see additional info at $GREEN https://yt-dl.org/"
+ exit 0
+ else
+ $install_ytdl_pip
+ fi
+ else
+ $install_ytdl_wget
+ fi
+ else
+ $install_ytdl_curl
+ fi
+else
+ $install_ytdl_brew
+fi
+}
+
+function install_ytdl_brew () {
+ # Easiest alternative install method is Homebrew, which we've confirmed is present.
+ brew install youtube-dl &&
+ printf '\n\e[0;32m%s\e[0m\n' "Congratulations! youtube-dl is now installed. Would you like to download a video now? (yes/no)"
+ read now_or_later
+ case $now_or_later in
+ y|Y|yes|Yes|YES) $run_easy_ytdl
+ ;;
+ *) Goodbye!
+ exit 0
+ ;;
+ esac
+}
+
+function install_ytdl_curl () {
+ # First recommended install method is curl, which we've confirmed is present.
+ sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl &&
+ printf '\n\e[1;34m%s\e[0m\n' "Compare this SHA256 hash to the published one at https://ytdl-org.github.io/youtube-dl/download.html" &&
+ shasum -a 256 /usr/local/bin/youtube-dl &&
+ printf '\n\e[0;32m%s\e[0m\n' "Congratulations! youtube-dl is now installed. Would you like to download a video now? (yes/no)"
+ read now_or_later
+ case $now_or_later in
+ y|Y|yes|Yes|YES) $run_easy_ytdl
+ ;;
+ *) Goodbye!
+ exit 0
+ ;;
+ esac
+}
+
+function install_ytdl_wget () {
+ # We didn't have curl, proceding with wget as second recommended install method.
+ sudo wget https://yt-dl.org/downloads/latest/youtube-dl -O /usr/local/bin/youtube-dl &&
+ printf '\n\e[1;34m%s\e[0m\n' "Compare this SHA256 hash to the published one at https://ytdl-org.github.io/youtube-dl/download.html" &&
+ shasum -a 256 /usr/local/bin/youtube-dl &&
+ printf '\n\e[0;32m%s\e[0m\n' "Congratulations! youtube-dl is now installed. Would you like to download a video now? (yes/no)"
+ read now_or_later
+ case $now_or_later in
+ y|Y|yes|Yes|YES) $run_easy_ytdl
+ ;;
+ *) Goodbye!
+ exit 0
+ ;;
+ esac
+}
+
+function install_ytdl_pip () {
+ # We did not have curl or wget, proceeding with pip as third recommended install method.
+ sudo pip install --upgrade youtube-dl &&
+ printf '\n\e[0;32m%s\e[0m\n' "Congratulations! youtube-dl is now installed. Would you like to download a video now? (yes/no)"
+ read now_or_later
+ case $now_or_later in
+ y|Y|yes|Yes|YES) $run_easy_ytdl
+ ;;
+ *) Goodbye!
+ exit 0
+ ;;
+ esac
+}
+
+function run_easy_ytdl () {
+ # Save file to the desktop, because your download folder is probably also cluttered.
+ cd ~/Desktop
+ clear
+ printf '\e[3;32m%-6s\a\e[m\n' "============================= Easy YouTube-DL ================================="
+ printf '%s\n' "Please paste the YouTube URL you would like to download below."
+ printf '%s\n\n' "Must be \"$RED$YTCOM$NOCOLOR\", not \"$RED$YTBE$NOCOLOR\". The file will be saved to $BLUE$HOME/Desktop$NOCOLOR."
+ printf '%s' $YELLOW "URL:$NOCOLOR "
+ read link_to_download
+ printf '\n\e[3;32m%-6s\a\e[m\n' "==============================================================================="
+ youtube-dl "$link_to_download"
+}