I created this fork mainly to add .eml support to Helix. However, the original grammar is a bit lacking so I've also decided to expand it a bit, to support things like unique highlighting for quoted replies in the body text.
Although at the time of forking, the grammar was using ABI 14, tree-sitter's default is 15. So, I decided it would be better for me to maintain an ABI 14 version of the grammar which we can be confident won't be upgraded.
- Added support for carriage return (
\r\n) newlines.- The previous parser broke if line endings weren't UNIX style.
- Carriage returns are very common in email files.
- They're also used by External Editor Revived.
- Added rules for quoted blocks.
- Quoted blocks are used in reply emails.
- Users may want to highlight these differently.
- This also opens the door to text object queries for easily operating on quote blocks.
- Added distinction between email address delimiter and address.
- Improved error detection on malformed headers.
- Added highlight queries (for Helix).
- Added text object queries (for Helix).
- Names, addresses, and other fields in headers are
entry. - Subject and body paragraphs are
function. - Quoted replies are
comment.
- Names, addresses, and other fields in headers are
- Added support for email-only headers (no Name)
- Also fixed capitalized email addresses.
- Thanks to die1465 for helping with the regex.
For some reason, Helix was refusing to treat the last node in the file as a valid text object unless it was followed by a newline. This is why quote_group exists. I know it's redundant, but I couldn't get this working in Helix otherwise.
More than welcome. Please contribute. I am going clinically insane.