Formatting Erlang code in Visual Studio Code
The ErlangLS extension for VS Code includes formatting, using rebar3_format. I’d prefer to use erlfmt, so here’s how it should be set up.
This is a corrected version of this post.
Install VS Code extension
- Install the
erlang-ls.erlang-lsextension.
Configure the formatter
The ErlangLS extension uses rebar3_format, and this is hard-coded. But you can configure rebar3_format to use a
different formatter, instead of its default, built-in one. Here’s how.
To do this globally, create ~/.config/rebar3/rebar.config containing the following:
{plugins, [rebar3_format, erlfmt]}.
{format, [
{formatter, erlfmt_formatter}
]}.
The
--files option to rebar3 format wants to handle its own wildcards, so use quotes: rebar3 format --files 'src/*.erl'