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Denis Lehmann 2021-03-15 00:35:17 +01:00
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* tyt * tyt
:PROPERTIES: :PROPERTIES:
:header-args: :tangle tyt :shebang "#!/bin/sh" :header-args: :tangle tyt :shebang "#!/bin/sh"
:END: :END:
Terminal YouTube (*tyt*) is a small bash script that lets you play YouTube videos by query from the command line. Terminal YouTube (*tyt*) is a small bash script that lets you play YouTube videos by query from the command line.
It is created via literate programming, you can find the code below. It is created via literate programming, you can find the code below.
** Script ** Script
*** Dependencies *** Dependencies
The dependencies of the script are: The dependencies of the script are:
- [[https://stedolan.github.io/jq/][jq]] - [[https://stedolan.github.io/jq/][jq]]
- [[https://mpv.io/][mpv]] - [[https://mpv.io/][mpv]]
- [[https://ytdl-org.github.io/youtube-dl/][youtube-dl]] - [[https://ytdl-org.github.io/youtube-dl/][youtube-dl]]
Please make sure those are available on your system. Please make sure those are available on your system.
If you are using the [[https://nixos.org/][Nix]] package manager, you can run =nix-shell= in the project directory. If you are using the [[https://nixos.org/][Nix]] package manager, you can run =nix-shell= in the project directory.
This will drop you into a shell with all requirements fulfilled. This will drop you into a shell with all requirements fulfilled.
On the start of the script, it is checked if the dependencies are fulfilled. On the start of the script, it is checked if the dependencies are fulfilled.
#+begin_src sh #+begin_src sh
if ! command -v mpv &> /dev/null if ! command -v mpv &> /dev/null
then then
echo -ne "\e[1mmpv\e[0m was not found, please install it" echo -ne "\e[1mmpv\e[0m was not found, please install it"
@ -31,29 +31,29 @@
echo -ne "\e[1myoutube-dl\e[0m was not found, please install it" echo -ne "\e[1myoutube-dl\e[0m was not found, please install it"
exit 1 exit 1
fi fi
#+end_src #+end_src
*** Usage *** Usage
This function prints the usage of the script. This function prints the usage of the script.
#+begin_src sh #+begin_src sh
function print_usage { function print_usage {
echo "tyt [ (-a* | --alternative) | (-i | --interactive) ] \"QUERY\"" echo "tyt [ (-a* | --alternative) | (-i | --interactive) ] \"QUERY\""
} }
#+end_src #+end_src
*** Arguments *** Arguments
At first we parse the arguments. At first we parse the arguments.
We have the following flags: We have the following flags:
- =a*|alternative= :: Alternative video (optional); You can parse any amount of alternatives (e.g. =-aaa=) - =a*|alternative= :: Alternative video (optional); You can parse any amount of alternatives (e.g. =-aaa=)
- =i|interactive= :: Interactive mode; Shows the first 10 results and queries for a selection; If this flag is set, =-a= is ignored - =i|interactive= :: Interactive mode; Shows the first 10 results and queries for a selection; If this flag is set, =-a= is ignored
Additionally we have exacly one mandatory quoted string as query. Additionally we have exacly one mandatory quoted string as query.
#+begin_src sh #+begin_src sh
alternative=0 alternative=0
format="flac" format="flac"
interactive=false interactive=false
@ -99,26 +99,26 @@
fi fi
query="${other_arguments[0]}" query="${other_arguments[0]}"
#+end_src #+end_src
*** Greeter *** Greeter
If the arguments match, print a greeter. If the arguments match, print a greeter.
#+begin_src sh #+begin_src sh
echo -ne "\n \e[1m\ /\e[0m\n" echo -ne "\n \e[1m\ /\e[0m\n"
echo -ne " \e[1m=======\e[0m\n" echo -ne " \e[1m=======\e[0m\n"
echo -ne " \e[1m| \e[31mtyt\e[0m \e[1m|\e[0m\n" echo -ne " \e[1m| \e[31mtyt\e[0m \e[1m|\e[0m\n"
echo -ne " \e[1m=======\e[0m\n\n" echo -ne " \e[1m=======\e[0m\n\n"
#+end_src #+end_src
*** Get URL *** Get URL
To play a video, we need to get a valid URL. To play a video, we need to get a valid URL.
Since there are sometimes parsing errors of the JSON response, we use an endless loop to try until we get a valid response. Since there are sometimes parsing errors of the JSON response, we use an endless loop to try until we get a valid response.
The first /n/ URLs are saved if an alternative download is requested. The first /n/ URLs are saved if an alternative download is requested.
#+begin_src sh #+begin_src sh
i=0 i=0
if [ "$interactive" = true ] if [ "$interactive" = true ]
@ -167,13 +167,13 @@
titles=($titles) titles=($titles)
uploaders=($uploaders) uploaders=($uploaders)
IFS=$OLDIFS IFS=$OLDIFS
#+end_src #+end_src
*** Interactive selection *** Interactive selection
If the interactive flag is present, show the first ten results and query for a video to play. If the interactive flag is present, show the first ten results and query for a video to play.
#+begin_src sh #+begin_src sh
if [ "$interactive" = true ] if [ "$interactive" = true ]
then then
echo "" echo ""
@ -198,13 +198,13 @@
title=${titles[$alternative]} title=${titles[$alternative]}
uploader=${uploaders[$alternative]} uploader=${uploaders[$alternative]}
fi fi
#+end_src #+end_src
*** Play video *** Play video
Finally the video is played via mpv. Finally the video is played via mpv.
#+begin_src sh #+begin_src sh
echo -ne "Playing: \e[32m\e[1m$title\e[0m (\e[33m\e[1m$uploader\e[0m)\n" echo -ne "Playing: \e[32m\e[1m$title\e[0m (\e[33m\e[1m$uploader\e[0m)\n"
mpv $url &> /dev/null mpv $url &> /dev/null
#+end_src #+end_src