Bring compiler into Astro (#4)

* include source compiler

* Import from JS

* Conditionally use the instance contents

Co-authored-by: Fred K. Schott <fkschott@gmail.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/src/compiler/parse/read/script.ts b/src/compiler/parse/read/script.ts
new file mode 100644
index 000000000..c5fbee699
--- /dev/null
+++ b/src/compiler/parse/read/script.ts
@@ -0,0 +1,55 @@
+// @ts-nocheck
+
+import * as acorn from '../acorn';
+import { Parser } from '../index.js';
+import { Script } from '../../interfaces.js';
+import { Node, Program } from 'estree';
+
+const script_closing_tag = '</script>';
+
+function get_context(parser: Parser, attributes: any[], start: number): string {
+	const context = attributes.find(attribute => attribute.name === 'context');
+	if (!context) return 'default';
+
+	if (context.value.length !== 1 || context.value[0].type !== 'Text') {
+		parser.error({
+			code: 'invalid-script',
+			message: 'context attribute must be static'
+		}, start);
+	}
+
+	const value = context.value[0].data;
+
+	if (value !== 'module') {
+		parser.error({
+			code: 'invalid-script',
+			message: 'If the context attribute is supplied, its value must be "module"'
+		}, context.start);
+	}
+
+	return value;
+}
+
+export default function read_script(parser: Parser, start: number, attributes: Node[]): Script {
+	const script_start = parser.index;
+	const script_end = parser.template.indexOf(script_closing_tag, script_start);
+
+	if (script_end === -1) {
+		parser.error({
+			code: 'unclosed-script',
+			message: '<script> must have a closing tag'
+		});
+	}
+
+	const source = parser.template.slice(0, script_start).replace(/[^\n]/g, ' ') +
+		parser.template.slice(script_start, script_end);
+	parser.index = script_end + script_closing_tag.length;
+
+	return {
+		type: 'Script',
+		start,
+		end: parser.index,
+		context: get_context(parser, attributes, start),
+		content: source
+	};
+}