Artifact [2925f46861]

Artifact 2925f468610c73101accc367c01b63e8eae9d52d457ad4423d9a4b553c4f87e7:

• File internal/merge/text.go — part of check-in [eb1791acd5] at 2026-10-19 01:52:19 on branch feat/submanifest-reader — fix(merge): IsText converts as fossil's text_diff does

  Read data through the ported BOM/UTF-16 conversion and line splitter, so the Update gate and the merge agree on what is text.

  Tracked in #447 (user: [email protected], size: 641) [annotate] [blame] [check-ins using] [more...]

package merge

// lineLimit is the longest line, in bytes without its newline, that
// fossil's line diff accepts (LENGTH_MASK in src/diff.c).
const lineLimit = lengthMask

// IsText reports whether fossil's line merge accepts data: after the
// conversion text_diff applies (a UTF-8 BOM dropped, UTF-16 converted to
// UTF-8), it holds no NUL byte and no line longer than lineLimit
// (count_lines and break_into_lines in src/diff.c). Fossil refuses to
// line-merge when any of the three versions fails, and handles the file as
// binary instead.
func IsText(data []byte) bool {
	_, _, ok := breakIntoLines(toUTF8NoBOM(data))
	return ok
}