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45 lines
1.3 KiB
45 lines
1.3 KiB
4 years ago
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import MagicString from 'magic-string';
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let indent_size = 4;
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let comment_multi = true;
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function get_processor(tag_name, search, replace) {
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return {
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[tag_name]: ({ content, filename }) => {
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let code = content.slice();
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const ms = new MagicString(code);
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const idx = ms.original.indexOf(search);
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if (idx == -1) throw new Error('search not found in src');
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ms.overwrite(idx, idx + search.length, replace, { storeName: true });
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// change line + column
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const indent = Array.from({ length: indent_size }).join(' ');
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ms.prependLeft(idx, '\n'+indent);
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const map_opts = { source: filename, hires: true, includeContent: false };
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const map = ms.generateMap(map_opts);
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const attach_line = (tag_name == 'style' || comment_multi)
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? `\n/*# sourceMappingURL=${map.toUrl()} */`
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: `\n//# sourceMappingURL=${map.toUrl()}` // only in script
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;
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code = ms.toString() + attach_line;
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indent_size += 2;
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if (tag_name == 'script') comment_multi = !comment_multi;
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return { code };
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}
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};
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}
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export default {
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preprocess: [
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get_processor('script', 'replace_me_script', 'done_replace_script_1'),
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get_processor('script', 'done_replace_script_1', 'done_replace_script_2'),
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get_processor('style', '.replace_me_style', '.done_replace_style_1'),
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get_processor('style', '.done_replace_style_1', '.done_replace_style_2')
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]
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};
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