fix(live-inject): preserve indentation on remove, no orphan blank line

The insert path puts the block's opener line right after the anchor's
indent (e.g. six spaces plus </body>), which transfers the indent
onto the opener line and leaves the anchor unindented in the injected
file. The remove path consumed the block's trailing newline but left
the pre-block indent behind, producing two bugs in one:

  Before insert:  `      </body>`
  After remove:   `      \n</body>`  (orphan indent + unindented anchor)

Fix: capture `([ \t]*)` immediately before each marker and replace the
whole block (including its trailing newline and any trailing spaces on
the ender line) with just the captured indent. The indent now hands
itself back to the anchor line that follows — the file round-trips
byte-for-byte.

New tests/live-inject.test.mjs with four round-trip cases:
- HTML file with indented </body>
- JSX layout with indented </body> (EAC shape)
- Multi-file batch
- Column-0 </body> (no indent — already worked; regression baseline)

All four pass after the fix. Full suite clean via `bun run test`.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Paul Bakaus
2026-04-22 01:09:49 -07:00
co-authored by Claude Opus 4.7
parent e441e88cc1
commit 99cccc2f9b
3 changed files with 165 additions and 5 deletions
@@ -167,15 +167,21 @@ function insertTag(content, config, port) {
/**
* Remove the live script block. Matches either HTML or JSX comment markers
* regardless of config (so stale tags from a wrong config can still be cleaned).
*
* Indent-preserving: captures any whitespace immediately preceding the opener
* marker and re-emits it in place of the removed block. `insertTag` inserted
* the block *after* the original line's indent and *before* the anchor (e.g.
* `</body>`), which moved the indent onto the opener line and left the anchor
* unindented. Replacing the whole block (plus its trailing newline) with just
* the captured indent hands the indent back to the anchor that follows.
*/
function removeTag(content, _syntax) {
// Two patterns: HTML comment markers or JSX comment markers, with any content between.
const patterns = [
/\n?<!--\s*impeccable-live-start\s*-->[\s\S]*?<!--\s*impeccable-live-end\s*-->\n?/,
/\n?\{\/\*\s*impeccable-live-start\s*\*\/\}[\s\S]*?\{\/\*\s*impeccable-live-end\s*\*\/\}\n?/,
/([ \t]*)<!--\s*impeccable-live-start\s*-->[\s\S]*?<!--\s*impeccable-live-end\s*-->[ \t]*\n/,
/([ \t]*)\{\/\*\s*impeccable-live-start\s*\*\/\}[\s\S]*?\{\/\*\s*impeccable-live-end\s*\*\/\}[ \t]*\n/,
];
for (const pat of patterns) {
const next = content.replace(pat, '\n');
const next = content.replace(pat, '$1');
if (next !== content) return next;
}
return content;