## Problem
Pressing `du` on a `UU` (unmerged) file in the fugitive status buffer
had no
effect. There was no way to see a proper ours-vs-theirs diff with syntax
highlighting and intra-line changes, or to resolve conflicts from within
a
unified diff view.
Additionally, pressing `du` on a section header containing only unmerged
files
showed "no changes in section" because `git diff` produces combined
(`diff --cc`)
output for unmerged files, which was stripped entirely.
## Solution
Fetch `:2:` (ours) and `:3:` (theirs) from the git index and generate a
standard
unified diff. The existing highlight pipeline (treesitter + intra-line)
applies
automatically. Resolution keymaps (`doo`/`dot`/`dob`/`don`) on hunks in
the diff
view write changes back to the working file's conflict markers.
Navigation
(`]x`/`[x`) jumps between unresolved conflict hunks.
For section diffs, combined diff entries are now replaced with generated
ours-vs-theirs unified diffs instead of being stripped.
Works for merge, cherry-pick, and rebase conflicts — git populates
`:2:`/`:3:`
the same way for all three.
Closes#61
Problem: diffs:// buffers could trigger spurious LSP diagnostics,
opening multiple diffs from fugitive created redundant splits, and
there was no quick way to close diff windows.
Solution: disable diagnostics on diff buffers, reuse existing
diffs:// windows in the tabpage instead of creating new splits,
and add a buffer-local q keymap to close diff windows.
Problem: running :e on a :Gdiff buffer cleared all content because
diffs:// buffers had no BufReadCmd handler. Neovim tried to read the
buffer name as a file path, found nothing on disk, and emptied the
buffer. This affected all three buffer creation paths (gdiff,
gdiff_file, gdiff_section).
Solution: register a BufReadCmd autocmd for diffs://* that parses the
URL and regenerates diff content from git. Change buffer options from
nofile/wipe to nowrite/delete (matching fugitive's approach) so
buffer-local autocmds and variables survive across unload/reload
cycles. Store old filepath as buffer variable for rename support.
When pressing `du`/`dU` from a hunk line in the fugitive status buffer
(after expanding with `=`), the unified diff now opens at the
corresponding line instead of line 1.
Implementation:
- `fugitive.get_hunk_position()` returns @@ header and offset when on a hunk line
- `commands.find_hunk_line()` finds matching @@ header in diff buffer
- `commands.gdiff_file()` accepts optional `hunk_position` and jumps after opening
Also updates @phanen's README credit for the previous two fixes.
Closes#65
Files detected via shebang or modeline (e.g., `build` with `#!/bin/bash`)
weren't getting syntax highlighting because `vim.filetype.match()` only
does filename-based detection.
Now `get_ft_from_filename()` first checks if a buffer already exists for
the file and uses its detected filetype. This requires knowing the repo
root to construct the full path, so:
- `parse_buffer()` reads `b:diffs_repo_root` or `b:git_dir` (fugitive)
- `commands.lua` sets `b:diffs_repo_root` on diff buffers it creates
Co-authored-by: phanen <phanen@qq.com>
Parse both old and new filenames from rename lines (R old -> new).
When diffing staged renames, use old filename as base to correctly
show content changes rather than treating the file as entirely new.
Also adds comprehensive tests for filename edge cases:
- Double extensions, hyphens, underscores, dotfiles
- Deep nested paths, complex renames
- Documents known limitation with filenames containing ' -> '
Section headers (Staged/Unstaged) now show all diffs in that section,
matching fugitive's behavior. Untracked files show as all-added diffs.
Deleted files show as all-removed diffs.
Also handles edge cases:
- Empty new/old content for deleted/new files
- Section header detection returns is_header flag
Adds gdiff_file() which can diff any file path (not just current buffer)
with support for staged vs unstaged changes:
- staged=true diffs index against HEAD
- staged=false diffs working tree against index
- Falls back to HEAD if file not in index (for untracked comparison)
Compares current buffer against any git revision (default HEAD), opens result
with full diffs.nvim syntax highlighting. Follows fugitive convention:
:Gdiff/:Gvdiff open vertical split, :Ghdiff opens horizontal split.
