Module merge_diff 

Merge commit and combined (--cc / -c) diff helpers.

These mirror the subset of Git’s combine-diff output needed for porcelain commands (git show, git diff during conflicts, git diff-tree -c).

Functions

all_blob_paths_in_tree_order

All blob paths in tree_oid, depth-first in Git tree entry order (for diff / log --rotate-to / --skip-to).

blob_oid_at_path

OID of the blob at path in tree.

blob_text_for_diff

Prepare blob bytes for diff: optional textconv when use_textconv and diff=<driver>.

blob_text_for_diff_with_oid

Like blob_text_for_diff, but uses refs/notes/textconv/<driver> when diff.<driver>.cachetextconv is true and blob_oid is known.

combined_diff_paths

Paths that differ between the merge result tree and every parent tree.

combined_merge_parent_blob_paths

Per-parent blob paths for a combined merge path when rename detection is enabled.

convert_blob_to_worktree_for_path

Blob bytes after smudge/EOL conversion for path, using the same rules as checkout.

diff_cachetextconv_enabled

diff_forced_binary_by_driver

Force Binary files ... differ when the path’s diff driver sets binary, except for symlinks.

diff_textconv_active

Returns true when path has a diff=<driver> attribute and diff.<driver>.textconv is set.

diff_textconv_cmd_line

format_combined_binary

Full combined diff for a binary path (two parents).

format_combined_binary_header

Combined diff header: diff --combined or diff --cc.

format_combined_binary_header_n

index line for N-parent combined/binary diffs (p1,p2,...pn..result).

format_combined_textconv_patch

Combined text diff with optional textconv (N parents, single merge path).

format_gitlink_unmerged_conflict_combined

Combined diff --cc for an unmerged gitlink path when stage blobs are absent from the ODB (e.g. t4027 synthetic 1ff… / 2ff… OIDs). Uses full hex in Subproject commit lines like Git.

format_parent_patch

diff --git against parent p for merge commit -m output.

format_worktree_conflict_combined

git diff / git diff --cc during a conflict: worktree file with markers.

is_binary_for_diff

True if diff should treat this path as binary (NUL in blob or -diff / diff=unset).

read_blob_at_path

Read the blob at path in tree, or None if missing.

run_textconv

Run diff.<driver>.textconv feeding input on stdin; returns UTF-8 lossy text on success.

run_textconv_raw

Run diff.<driver>.textconv on input; returns raw stdout on success.