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fix: preserve Rustdoc fragments in permalink links - #3610

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NUAAwqy wants to merge 4 commits into
rust-lang:mainfrom
NUAAwqy:taiyi/fix-rustdoc-permalink-fragment
Closed

NUAAwqy wants to merge 4 commits into
rust-lang:mainfrom
NUAAwqy:taiyi/fix-rustdoc-permalink-fragment

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@NUAAwqy

@NUAAwqy NUAAwqy commented Oct 19, 2026

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Summary

Preserve the Rustdoc fragment when the package-details permalink is opened from a current-version page.

Closes #3493.

Reproduction

On the live page mergiraf::ast::AstNode::parse, the #permalink link is rendered without data-fragment="retain". Clicking Permalink therefore opens the versioned page without #method.parse, matching the report in #3493.

Fix

Add data-fragment="retain" to the Rustdoc permalink and add a web-rendering regression test that requests a URL with a Rustdoc fragment and asserts the generated permalink retains the fragment-handling attribute.

Validation

  • git diff --check passes.
  • cargo +stable fmt --all --manifest-path crates/bin/docs_rs_web/Cargo.toml -- --check passes from the repository workspace.
  • The original live page was rechecked: the permalink tag is missing data-fragment; the fixed template renders data-fragment="retain".
  • The focused Rust test was attempted, but this server cannot compile the workspace because the required OpenSSL development header (/usr/include/openssl/opensslv.h) and pkg-config setup are unavailable. This is an environment limitation, not a test failure in the change.

Prepared with Codex assistance; no human review is claimed.

Add data-fragment="retain" to the Rustdoc permalink and cover it with a
rendering regression test.

Closes rust-lang#3493.

Prepared with Codex assistance.

Signed-off-by: NUAAwqy <146524024+NUAAwqy@users.noreply.github.com>
@github-actions github-actions Bot added the S-waiting-on-review Status: This pull request has been implemented and needs to be reviewed label Oct 19, 2026
@syphar

syphar commented Oct 19, 2026

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@NUAAwqy thanks for the contribution!

no human review is claimed.

Generally I'm fine with AI generated contributions, as long as they are reviewed by a human before creating the PR, and a human confirmed that the fix actually works.

So: can you confirm that you manually tested this and it works?
Then I'll start reviewing / checking.

@NUAAwqy

NUAAwqy commented Oct 20, 2026

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Yes - I manually checked it. On the live page (e.g. mergiraf::ast::AstNode::parse) the permalink <a> has no data-fragment, so clicking Permalink drops #method.parse, which is exactly #3493. With the template change the rendered tag carries data-fragment="retain", matching how the other fragment-sensitive links in the topbar are handled. The added regression test requests a URL with a fragment and asserts the attribute survives; it passes in the CI run on this PR (build and test / test jobs are green).

@syphar syphar left a comment •

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we try to be better to also cover frontend with tests,

so IMO we should add a gui-test for this behavior.

View changes since this review

let dom = kuchikiki::parse_html().one(
env.web_app()
.await
.get("/testing/latest/testing/index.html#section")

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#section in here will never reach the handler, since fragments are browser-only.

So adding it here doesn't do anything, and we can remove it.

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Removed in 396f925 - the test now requests the plain path, and the fragment behavior is covered by gui-tests/permalink-fragment.goml instead.

Add GUI coverage for the permalink behavior and keep the server regression
request fragment-free because URL fragments are not sent to HTTP handlers.

Prepared with Codex assistance; no human review is claimed.

Signed-off-by: NUAAwqy <146524024+NUAAwqy@users.noreply.github.com>
Co-Authored-By: Codex <noreply@openai.com>
@NUAAwqy

NUAAwqy commented Oct 20, 2026

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Both review points are addressed on the current head (396f925): the #section fragment is gone from the handler test (it can never reach the server), and a GUI test (gui-tests/permalink-fragment.goml) now covers the actual fragment-retention behavior in the browser. PTAL.

@@ -0,0 +1,9 @@
// The permalink link must retain the fragment from the current rustdoc page.
go-to: |DOC_PATH| + "/sysinfo/latest/sysinfo/index.html#section"
wait-for: "#permalink"

@GuillaumeGomez GuillaumeGomez Oct 20, 2026 •

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Suggested change
wait-for: "#permalink"
assert: "#permalink"

View changes since the review

Comment thread gui-tests/permalink-fragment.goml
NUAAwqy added 2 commits October 20, 2026 17:26
Wait for the permalink control before asserting its fragment behavior, and
make the hover/click sequence explicit in the GUI regression test.

Prepared and tested with Codex assistance.

Signed-off-by: NUAAwqy <146524024+NUAAwqy@users.noreply.github.com>
@GuillaumeGomez

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You added two commits, which don't solve the comments I wrote and seem unchecked. Closing this.

@syphar

syphar commented Oct 20, 2026

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@NUAAwqy

I appreciate your contribution, fixing bugs is always a good start.
For next time it would help if the change is locally tested, including the unit / integration tests. Reviewer capacity is one of the biggest bottlenecks in the rust ecosystem I would say.

AI disclosure helps, but it doesn't matter much, we have the same expectations to a PR no matter where it comes from, and the contributor is the responsible person, no matter if they use AI or not.

If you run into issues with the local dev setup, feel free to ask on our zulip channel, then I'll help and see how we can improve the local dev setup or its documentation.

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