livecode 
livecode is an R package that enables you to broadcast a local R (or any other text) document over the web and provide live updates as it is edited.
Installation
You can install the development version of livecode from this GitHub
repository:
remotes::install_github("rundel/livecode")Usage
# From RStudio with an open R script
server = livecode::serve_file()
#> โ Started sharing 'example.R' at 'http://192.168.1.128:30000'.
#> โ The current ip address ('192.168.1.128') for the server is private, only users on the same local network are likely to be able to connect.
# Once started, send messages to your users.
server$send_msg("Hello World!", type = "success")
server$send_msg("Oh no!\n\n Something bad has happened.", type = "error")
# Once finished, shut the server down.
server$stop()
#> โ Stopped server at 'http://192.168.1.128:30000'.Using bitly
livecode has built in functionality for generating a bitlink
automatically for your livecoding session. To do this you will need to
provide livecode with a bitly API access token. To obtain one of these
tokens you will need to create an account with bitly (the free tier is
sufficient) and then select Profile Settings > Generic
Access Token and then enter your password when prompted. This
results in a long hexidecimal string that you should copy to your
clipboard.
livecode looks for this token in an environmental variable called
BITLY_PAT. To properly configure this environmental variable we can
use the usethis package. In R run the following,
usethis::edit_r_environ()which will open your .Renviron file for you and you will just need to
add a single line with the format
BITLY_PAT=0123456789abcdef0123456789abcdef01234567
replacing 0123456789abcdef0123456789abcdef01234567 with the
hexidecimal string you copied from bitly. After saving .Renviron you
will need to restart your R session and can then test that your token is
function correctly by running,
livecode::bitly_test_token()
#> โ Your bitly token is functioning correctly.