jesseduffield.lazygit/pkg/gui/controllers/helpers
Stefan Haller cf8e5fd27e Recover diff-line identity by parsing the buffer, behind a swappable seam
The focused main view's click/enter/e/G handlers all need the same thing: given
a rendered diff row, the patch-space line it corresponds to. Until now that came
solely from delta's lazygit-edit:// hyperlinks, which only carry a path and a
single line number — no side. That's lossy: for a deletion the number is the old
line, but the consumers fed it into new-file lookups, and two consecutive
deletions (which share a new-file line number) couldn't be told apart at all.

Replace GetFileAndLineForClickedDiffLine with GetDiffLineInfo, returning the
fuller (file, type, new-line, old-line) record from diff-line-metadata-notes.md.
This is mechanism #1: parse the decolorized view buffer — walk up to the file's
"diff --git" section, reuse patch.Parse on it (splitting multi-file commit diffs
on the "diff --git" boundaries), and read the type and line numbers off the patch
arithmetic. It serves the structure-preserving renderings — no pager, git diff
--color, and delta --color-only without line numbers — with no external
dependency.

To avoid trusting a mis-parse, the parser bails when a hunk's body no longer
matches its header (Patch.IsWellFormed). That's what happens when a pager keeps
the diff/hunk headers but restructures the body: delta's line-number gutters push
the +/- marker off the start of each line, so every body line reads as context.
Such renderings fall through to the next backend rather than yielding a confident
wrong answer. (diff-so-fancy goes further and rewrites the headers too, so it
fails even earlier, on the missing "diff --git".)

GetDiffLineInfo is a seam with swappable backends: the buffer parser first, then
the old hyperlink reader as a fallback for renderings the parser can't handle
(delta's default mode, or delta with line-number gutters). The future #2 OSC
per-cell metadata reader plugs in ahead of both, behind the same record shape.

Wire the consumers to the record per that doc's field mapping:
- dive into staging/patch building lands on the exact patch line, looking a
  deletion up by its old-file line number (PatchLineForOldLineNumber) so the
  two-deletions case resolves correctly;
- `e` edits at the new-file line;
- `G` anchors the PR link on the left (old) side for a deletion, the right (new)
  side otherwise.

The hyperlink fallback can't convey the side, so it reports DiffLineOther, which
the consumers treat as a non-deletion — i.e. exactly today's behavior.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-08-08 12:58:59 +02:00
..
amend_helper.go Allow passing refresh scope to WithGpgHandling 2025-03-24 08:41:58 +01:00
app_status_helper.go Decouple hiding the working tree state from blocking input 2026-08-05 17:29:20 +02:00
bisect_helper.go Remove the RefreshMode field 2026-07-17 12:32:32 +02:00
branches_helper.go Don't auto-forward branches when the repo was switched during the fetch 2026-07-20 17:07:39 +02:00
cherry_pick_helper.go Decouple hiding the working tree state from blocking input 2026-08-05 17:29:20 +02:00
commit_files_helper.go WIP FocusedMainViewSnapshot approach 2026-08-08 12:58:59 +02:00
commits_helper.go Rename Key to Keys in Binding, KeybindingsOpts, and MenuItem 2026-05-25 15:18:18 +02:00
commits_helper_test.go Remove hard line breaks when rewording commits 2024-03-09 10:00:44 +01:00
confirmation_helper.go Remove the now-dead PopupMutex 2026-07-17 12:35:54 +02:00
credentials_helper.go Remove the RefreshMode field 2026-07-17 12:32:32 +02:00
diff_helper.go Remove the RefreshMode field 2026-07-17 12:32:32 +02:00
diff_line_parser.go Recover diff-line identity by parsing the buffer, behind a swappable seam 2026-08-08 12:58:59 +02:00
diff_line_parser_test.go Recover diff-line identity by parsing the buffer, behind a swappable seam 2026-08-08 12:58:59 +02:00
drag_autoscroller.go Add DragAutoScroller helper 2026-07-31 08:26:35 +02:00
drag_autoscroller_test.go Add DragAutoScroller helper 2026-07-31 08:26:35 +02:00
files_helper.go Cleanup: remove unused interfaces for helpers 2025-04-08 16:08:25 +02:00
fixup_helper.go Suppress command logs for git calls related to the ctrl+f command 2026-07-19 19:22:48 +02:00
fixup_helper_test.go Ignore fixup commits for a found base commit when doing ctrl-f 2026-01-24 16:04:35 +01:00
gpg_helper.go Remove the RefreshMode field 2026-07-17 12:32:32 +02:00
helpers.go Extract some functions from CommitFilesController to a new CommitFilesHelper 2026-08-08 12:58:59 +02:00
host_helper.go Cleanup: remove unused interfaces for helpers 2025-04-08 16:08:25 +02:00
inline_status_helper.go Update comments that still describe the removed blocking refresh mode 2026-07-21 22:23:58 +02:00
menu_key.go Use a slice of keys for each binding 2026-05-25 15:18:18 +02:00
merge_and_rebase_helper.go Check for exec todos on the UI thread 2026-07-17 12:35:54 +02:00
merge_conflicts_helper.go Make the conflict marker size a parameter of our marker matching 2026-08-08 12:43:42 +02:00
mode_helper.go Scroll the selection into view after a filtering mode change 2026-08-05 17:29:20 +02:00
patch_building_helper.go Recover diff-line identity by parsing the buffer, behind a swappable seam 2026-08-08 12:58:59 +02:00
record_directory_helper.go split context common from helper common 2023-04-30 13:19:53 +10:00
refresh_helper.go Make the conflict marker size a parameter of our marker matching 2026-08-08 12:43:42 +02:00
refresh_helper_test.go Restore commit selection even when the commit's TODO status changed 2026-06-23 09:20:05 +02:00
refs_helper.go Show the inline status again when checking out a newly created remote branch 2026-07-21 22:23:57 +02:00
repos_helper.go Remember how to get back to a repo we entered a submodule from 2026-08-08 11:15:01 +02:00
search_helper.go Cleanup: remove unnecessary function Label() 2026-04-30 22:14:26 +02:00
signal_handling.go Implement suspending the app using ctrl-z 2025-08-14 20:41:46 +02:00
signal_handling_windows.go Implement suspending the app using ctrl-z 2025-08-14 20:41:46 +02:00
snake_helper.go Bump gocui and adapt lazygit code 2024-12-01 10:40:08 +01:00
staging_helper.go Recover diff-line identity by parsing the buffer, behind a swappable seam 2026-08-08 12:58:59 +02:00
sub_commits_helper.go Remove refresh mutexes made redundant by bouncing 2026-07-07 18:09:33 +02:00
suggestions_helper.go Hold the file-path suggestions trie outside the model 2026-07-17 12:35:54 +02:00
suspend_resume_helper.go Implement suspending the app using ctrl-z 2025-08-14 20:41:46 +02:00
tags_helper.go Convert keybinding fields to Keybinding 2026-05-25 15:32:47 +02:00
update_helper.go Copy gocui files into lazygit repo under pkg/gocui 2026-04-30 14:29:08 +02:00
upstream_helper.go Cleanup: remove unused interfaces for helpers 2025-04-08 16:08:25 +02:00
upstream_helper_test.go Standardise on using lo for slice functions 2023-07-30 18:51:23 +10:00
view_helper.go standardise helper args 2023-04-30 13:19:53 +10:00
window_arrangement_helper.go Add gui.shrinkSidePanelsToContent option 2026-07-03 19:25:01 +02:00
window_arrangement_helper_test.go Add gui.shrinkSidePanelsToContent option 2026-07-03 19:25:01 +02:00
window_helper.go Drive the side panel layout from gui.sidePanels 2026-06-23 14:15:18 +02:00
working_tree_helper.go Remove the RefreshMode field 2026-07-17 12:32:32 +02:00
worktree_helper.go Remove the RefreshMode field 2026-07-17 12:32:32 +02:00
worktree_helper_test.go Add helper to compute candidate worktree parent directories 2026-07-03 18:53:05 +02:00