jojo/models/issues
Mathieu Fenniak a797a71dea fix: display code comments on removed lines-of-code to correct locations in PR view (#12092)
With the completion of #12015, when a comment is left on a changed line in a pull request, we track the comment against the line of code with `git blame` and then identify where it currently is in any diff with `git blame --reverse`.  However, this strategy only works for the *modified* lines of code -- eg. the `+...` in diffs, and not the `-...` in diffs.  The reason is that `git blame --reverse` can't track a line of code's location past the commit that it was removed in.

To permit comments that are left on lines of code that are removed to appear correctly in the UI, a separate approach is required for those comments.  This PR performs two major changes, which have been complex to figure out, but are reasonably easy to understand:

- When a comment is placed on a removed line in a PR, perform a `git blame --reverse` from the PR's base to the currently viewed commit, and use this information to record in the comment:
    - the **last commit that the line of code existed in** (stored in the `commit_sha` field)
    - the **line of code as of that commit** (stored in the `line` field, negative, to indicate that the comment is on a removal).
    - the **patch** where the comment was placed (stored in the field `patch`); existing functionality unchanged in this PR
- When viewing any diff in the PR, for each comment on a removal, perform a diff from the `commit_sha` (last commit that the line of code existed in) to the current commit being viewed, and verify that within that diff the left-hand-side line removal still exists at the same line of code in the diff, by comparing the current diff with the stored patch.
    - If present, place the commit in the UI at the line number.
    - If the line of code no longer exists in the diff at that point (for example, it was removed, commented upon, and then re-added in a later commit), then the comment is considered outdated and isn't displayed.

The algorithm used for marking a comment as "outdated" is also updated to use this approach.

## Checklist

The [contributor guide](https://forgejo.org/docs/next/contributor/) contains information that will be helpful to first time contributors. All work and communication must conform to Forgejo's [AI Agreement](https://codeberg.org/forgejo/governance/src/branch/main/AIAgreement.md). There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).

### Tests for Go changes

- I added test coverage for Go changes...
  - [x] in their respective `*_test.go` for unit tests.
  - [x] in the `tests/integration` directory if it involves interactions with a live Forgejo server.
- I ran...
  - [x] `make pr-go` before pushing

### Documentation

- [ ] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- [x] I did not document these changes and I do not expect someone else to do it.

### Release notes

- [x] This change will be noticed by a Forgejo user or admin (feature, bug fix, performance, etc.). I suggest to include a release note for this change.
- [ ] This change is not visible to a Forgejo user or admin (refactor, dependency upgrade, etc.). I think there is no need to add a release note for this change.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/12092
Reviewed-by: Andreas Ahlenstorf <aahlenst@noreply.codeberg.org>
Co-authored-by: Mathieu Fenniak <mathieu@fenniak.net>
Co-committed-by: Mathieu Fenniak <mathieu@fenniak.net>
2026-04-13 18:26:53 +02:00
..
TestGetParticipantIDsByIssue fix: don't display pending reviews as participants (#10528) 2026-01-06 10:47:21 +01:00
TestGetUIDsAndStopwatch feat: add foreign keys to stopwatch & tracked_time tables (#9373) 2025-10-01 00:31:38 +02:00
action_aggregator.go feat(ui): add links to review request targets in issue comments (#8239) 2025-07-23 04:45:58 +02:00
action_aggregator_test.go feat(ui): add links to review request targets in issue comments (#8239) 2025-07-23 04:45:58 +02:00
assignees.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
assignees_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
comment.go fix: display code comments on removed lines-of-code to correct locations in PR view (#12092) 2026-04-13 18:26:53 +02:00
comment_code.go fix: relocate PR review comments using git blame --reverse, improving comment placement (#12015) 2026-04-11 21:45:39 +02:00
comment_list.go refactor: reduce code duplication when accessing DefaultMaxInSize (#11999) 2026-04-05 22:03:45 +02:00
comment_list_test.go perf: bulk load resolvers & reactions on pull request comments (#11988) 2026-04-05 14:37:09 +02:00
comment_test.go fix: relocate PR review comments using git blame --reverse, improving comment placement (#12015) 2026-04-11 21:45:39 +02:00
content_history.go chore: handle error types consistently (#9873) 2026-03-06 00:48:06 +01:00
content_history_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
dependency.go refactor: migrate from lib/pq to jackc/pgx (#10219) 2025-11-30 17:47:45 +01:00
dependency_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue.go fix: don't display pending reviews as participants (#10528) 2026-01-06 10:47:21 +01:00
issue_index.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue_index_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue_label.go fix: possible cause of invalid issue counts; cache invalidation occurs before a active transaction is committed (#10130) 2025-11-17 01:07:29 +01:00
issue_label_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue_list.go refactor: reduce code duplication when accessing DefaultMaxInSize (#11999) 2026-04-05 22:03:45 +02:00
issue_list_test.go Update module github.com/golangci/golangci-lint/cmd/golangci-lint to v2 (forgejo) (#7367) 2025-03-28 22:22:21 +00:00
issue_lock.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue_project.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue_project_test.go chore: merge tests.AddFixtures and unittest.OverrideFixtures (#7648) 2025-04-25 09:14:33 +00:00
issue_search.go refactor: replace Value() from Option[T] with Get() & ValueOrZeroValue() (#11218) 2026-02-10 16:41:21 +01:00
issue_stats.go chore: add modernizer linter (#11936) 2026-04-02 03:29:37 +02:00
issue_stats_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue_test.go chore: add modernizer linter (#11936) 2026-04-02 03:29:37 +02:00
issue_update.go chore: add modernizer linter (#11936) 2026-04-02 03:29:37 +02:00
issue_user.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue_user_test.go refactor: migrate from lib/pq to jackc/pgx (#10219) 2025-11-30 17:47:45 +01:00
issue_watch.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue_watch_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue_xref.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
issue_xref_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
label.go feat: improve label filtering exclusion (#10702) 2026-02-08 00:31:31 +01:00
label_internal_test.go fix: reduce deadlocks merging PRs w/ async milestone stat recalcs (#9916) 2025-10-31 15:53:45 +01:00
label_test.go feat: improve label filtering exclusion (#10702) 2026-02-08 00:31:31 +01:00
main_test.go chore: move all test blank imports in a single package (#10662) 2026-01-02 05:32:32 +01:00
milestone.go refactor: replace Value() from Option[T] with Get() & ValueOrZeroValue() (#11218) 2026-02-10 16:41:21 +01:00
milestone_internal_test.go fix: reduce deadlocks merging PRs w/ async milestone stat recalcs (#9916) 2025-10-31 15:53:45 +01:00
milestone_list.go refactor: replace Value() from Option[T] with Get() & ValueOrZeroValue() (#11218) 2026-02-10 16:41:21 +01:00
milestone_test.go refactor: migrate from lib/pq to jackc/pgx (#10219) 2025-11-30 17:47:45 +01:00
moderation.go feat: render a link to poster profile next to the ID within shadow copy details (#10194) 2025-12-09 15:19:10 +01:00
moderation_test.go feat: render a link to poster profile next to the ID within shadow copy details (#10194) 2025-12-09 15:19:10 +01:00
pull.go feat: show link to pull requests targeting a non-default branch when pushing (#10079) 2025-11-19 14:59:13 +01:00
pull_list.go feat: show more relevant results for 'dependencies' dropdown (#8003) 2025-06-26 20:06:21 +02:00
pull_test.go feat: show link to pull requests targeting a non-default branch when pushing (#10079) 2025-11-19 14:59:13 +01:00
reaction.go refactor: reduce code duplication when accessing DefaultMaxInSize (#11999) 2026-04-05 22:03:45 +02:00
reaction_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
review.go fix: PR not blocked by review request for a whitelisted team (#8511) 2025-07-15 23:21:42 +02:00
review_list.go chore: add modernizer linter (#11936) 2026-04-02 03:29:37 +02:00
review_test.go chore: ensure consistent import aliasing for services and models (#10253) 2025-11-30 17:00:57 +01:00
stopwatch.go feat: add foreign keys to stopwatch & tracked_time tables (#9373) 2025-10-01 00:31:38 +02:00
stopwatch_test.go chore: merge tests.AddFixtures and unittest.OverrideFixtures (#7648) 2025-04-25 09:14:33 +00:00
tracked_time.go chore: add modernizer linter (#11936) 2026-04-02 03:29:37 +02:00
tracked_time_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00