gtts-cli wrapper for ease of use in language learning

tts

#! /bin/bash

# tts
#   Take some words or short text in a given language,
#   make Google's TTS pronounce it and play the pronunciation.
#
# usage
#   tts LANG-CODE TEXT TO SPEECH
#
# supported languages
#   gtts-cli --all
#
# dependencies
#   python3 -m pip install gtts
#   apt install mpv
#
# links
#   https://gtts.readthedocs.io/en/latest/index.html

# non-caching variant
# gtts-cli --output - --lang "lang" "$*" | mpv -

cache_dir="$HOME/.cache/tts"

lang="$1"
shift

mkdir -p "$cache_dir/$lang" 2>/dev/null

#cname=$( echo -n "$*" | sha1sum | cut -d ' '  -f1 )
cname=$( echo -n "$*" | tr -s '[:space:][:punct:]/' '---' )

if [ ! -f "$cache_dir/$lang/$cname" ]
then
    gtts-cli --lang "$lang" --output "$cache_dir/$lang/$cname" "$*" || exit 1
fi

mpv "$cache_dir/$lang/$cname"

find "$cache_dir" -type f -atime +7 -exec rm {} +
find "$cache_dir" -type d -empty -exec rmdir {} +