Sample extension grammar for HTML based template language (This is in bundle editor format, create a new grammar and paste in the contents.)

gistfile1.txt

{	patterns = (
		{	name = 'meta.tag.template.start.html';
			begin = '(<)(s:[\-.0-9_a-zA-Z]*)(?=\s|/?>)';
			end = '/?>';
			beginCaptures = {
				1 = { name = 'punctuation.definition.tag.begin.html'; };
				2 = { name = 'entity.name.tag.html'; };
			};
			endCaptures = { 0 = { name = 'punctuation.definition.tag.end.html'; }; };
			patterns = ( { include = 'text.html.basic#attribute'; } );
		},
		{	name = 'meta.tag.template.end.html';
			begin = '(</)(s:[\-.0-9_a-zA-Z]*)(?=\s|/?>)';
			end = '>';
			beginCaptures = {
				1 = { name = 'punctuation.definition.tag.begin.html'; };
				2 = { name = 'entity.name.tag.html'; };
			};
			endCaptures = { 0 = { name = 'punctuation.definition.tag.end.html'; }; };
			patterns = ( { include = 'text.html.basic#attribute'; } );
		},
		{	name = 'meta.embedded.line.scala-template';
			begin = '\$\{';
			end = '(\})';
			beginCaptures = { 0 = { name = 'punctuation.section.embedded.begin.scala-template'; }; };
			endCaptures = {
				0 = { name = 'punctuation.section.embedded.end.scala-template'; };
				1 = { name = 'source.scala-template'; };
			};
			contentName = 'source.scala';
			patterns = (
				{	name = 'variable.other.readwrite.scala-template';
					match = 'foobar';
				},
			);
		},
		{	include = 'text.html.basic'; },
	);
}