Sonic Pi has an experimental, undocumented feature to support snippets, which autoexpand with the TAB key.
Here's the issue: sonic-pi-net/sonic-pi#587
Specifically, Sam's comment: sonic-pi-net/sonic-pi#587 (comment)
... [T]o play with it now (with the caveat that it all may drastically change) you just need to create a file with the contents of your snippet with an .sps extension in a directory somewhere on your machine. You might want to create a snippets directory for your own personal snippets. The name of the file doesn't matter. You then load all the snippets in a given directory with:
load_snippets("/path/to/snippets/dir")At the top of the file you'll need to put some metadata telling Sonic Pi when to trigger your snippet and where to leave the cursor.
Here's an example of a complete snippet (from here: https://github.com/samaaron/sonic-pi/blob/master/etc/snippets/fx/fx_reverb.sps):
# key: fx r # point_line: 1 # point_index: 2 # -- with_fx :reverb do end
# key:tells Sonic Pi which letters to look for prior to point (the cursor) when tab is hit.
# point_line:tells Sonic Pi which line to place the point on (relative to the snippet). This is 0 indexed
# point_index:tells Sonic Pi which position on the line to place the po I int (also 0 indexed). This is also relative to the snippet.
Some example snippets: