Avoid stringer-related deadlocks without adding ISGOMOCK #204
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
JacobOaks
force-pushed
the
joaks/reflect_gomock_detection
branch
from
9a164ea to
f042bfa
Compare
A deadlock related to controller calling Stringer on mocks themselves was revealed in uber-go#116. uber-go#144 solved this deadlock by adding a generated `ISGOMOCK()` method to all generated mocks, and then checking for it before calling `.String()` on arguments. This reveals an exported method on each generated mock that: * Bloats the generated code * Can be taken dependency on in strange ways via Hyrum's Law * Technically opens up another route for naming collision. This PR attempts to clean up this type of check by instead generating an unexported field in generated mock structs instead, and checks for it using reflect. This hides this implementation detail of gomock/mockgen better, and produces less generated bloat. Note that, importantly, the regression test added in uber-go#144 still passes with this PR. Ref: uber-go#193
JacobOaks
force-pushed
the
joaks/reflect_gomock_detection
branch
from
f042bfa to
1f58549
Compare
apricote
pushed a commit
to hetznercloud/fleeting-plugin-hetzner
that referenced
this pull request
Oct 18, 2024
…eting-plugin-hetzner!135) This MR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [go.uber.org/mock](https://github.com/uber/mock) | require | minor | `v0.4.0` -> `v0.5.0` | --- ### Release Notes <details> <summary>uber/mock (go.uber.org/mock)</summary> ### [`v0.5.0`](https://github.com/uber-go/mock/releases/tag/v0.5.0) [Compare Source](uber-go/mock@v0.4.0...v0.5.0) #### 0.5.0 (15 Oct 2024) ##### Added - [#​153][]: Add `--write_command_comment` flag to specify whether to include `Generated by this command` comment. - [#​191][]: Add `--build_constraint` flag to add `//go:build` directives to generated mocks - [#​214][]: Add gob mode to support custom package loading techniques in place of --exec_only ##### Changed - [#​181][]: Made mockgen faster by changing flags passed to `go list`. - [#​183][]: Made `Cond` matcher generic. - [#​204][]: Removed `ISGOMOCK()` from generated mocks. - [#​207][]: Deprecated reflect mode and replaced it with the new package mode. ##### Fixed - [#​144][]: Fix a deadlock that can happen when mocking an interface that matches `fmt.Stringer`. - [#​168][]: Fix an issue where the "generated by" comment was being included in the package comment of generated mocks. [#​144]: uber-go/mock#144 [#​153]: uber-go/mock#153 [#​168]: uber-go/mock#168 [#​181]: uber-go/mock#181 [#​183]: uber-go/mock#183 [#​191]: uber-go/mock#191 [#​204]: uber-go/mock#204 [#​207]: uber-go/mock#207 [#​214]: uber-go/mock#214 Thanks to [@​tulzke](https://github.com/tulzke) [@​JacobOaks](https://github.com/JacobOaks) [@​ARR4N](https://github.com/ARR4N) [@​sashamelentyev](https://github.com/sashamelentyev) [@​sywhang](https://github.com/sywhang) [@​fasmat](https://github.com/fasmat) [@​eyasy1217](https://github.com/eyasy1217) [@​ghouscht](https://github.com/ghouscht) [@​tie](https://github.com/tie) [@​Neo2308](https://github.com/Neo2308) [@​carson-brill](https://github.com/carson-brill) [@​alexandear](https://github.com/alexandear) [@​sodul](https://github.com/sodul) [@​nbgraham](https://github.com/nbgraham) for their contributions this release. </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever MR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this MR, check this box --- This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4xMjcuMCIsInVwZGF0ZWRJblZlciI6IjM4LjEyNy4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->
4 tasks
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
A deadlock related to controller calling Stringer on mocks themselves
was revealed in #116. #144 solved this deadlock by adding a generated
ISGOMOCK()method to all generated mocks, and then checking for itbefore calling
.String()on arguments.This reveals an exported method on each generated mock that:
This PR attempts to clean up this type of check by instead generating
an unexported field in generated mock structs instead, and checks for it using reflect.
This hides this implementation detail of gomock/mockgen better,
and produces less generated bloat.
Note that, importantly, the regression test added in #144 still passes
with this PR.
Ref: #193