Make sure to rebuild rustdoc if src/rustdoc-json-types is changed
#142758
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It's been around for ages (#81287), I think this was hidden for so longer because modifying |
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Jun 20, 2025
Make sure to rebuild rustdoc if `src/rustdoc-json-types` is changed I think `rustdoc-json-types` was more recently split out, so this download-rustc logic became outdated as it wasn't tracked. This PR adds `src/rustdoc-json-types` to be tracked for difference versus upstream, so that we properly rebuild rustdoc if it has changes versus upstream. Fixes rust-lang#142738. ### Local testing This is not so easy to test locally because it requires download-rustc. To test this, you need to: 1. Disable `download-rustc` inhibition from bootstrap changes versus upstream, by including `:!src/bootstrap` in https://github.com/rust-lang/rust/blob/255aa220821c05c3eac7605fce4ea1c9ab2cbdb4/src/bootstrap/src/core/config/config.rs#L67-L74. 2. Then, use a config like `profile = "tools"` which by default uses `download-rustc = "if-unchanged"`. 3. Run `./x test tests/rustdoc-json` one time, to "prime" initial build caches. 4. Change the `FORMAT_VERSION` in `src/rustdoc-json-types`, i.e. ```diff diff --git a/src/rustdoc-json-types/lib.rs b/src/rustdoc-json-types/lib.rs index 1f93895..72a3720c7b4 100644 --- a/src/rustdoc-json-types/lib.rs +++ b/src/rustdoc-json-types/lib.rs `@@` -38,7 +38,7 `@@` // are deliberately not in a doc comment, because they need not be in public docs.) // // Latest feature: Pretty printing of inline attributes changed -pub const FORMAT_VERSION: u32 = 48; +pub const FORMAT_VERSION: u32 = 666; ``` 5. Observe that without this patch, `rustdoc-json` tests fail because `FORMAT_VERSION` mismatch. Observe that with this patch, rustdoc gets properly rebuilt and `rustdoc-json` tests pass. cc `@aDotInTheVoid` r? Kobzol
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I think
rustdoc-json-typeswas more recently split out, so this download-rustc logic became outdated as it wasn't tracked. This PR addssrc/rustdoc-json-typesto be tracked for difference versus upstream, so that we properly rebuild rustdoc if it has changes versus upstream.Fixes #142738.
Local testing
This is not so easy to test locally because it requires download-rustc. To test this, you need to:
download-rustcinhibition from bootstrap changes versus upstream, by including:!src/bootstrapinrust/src/bootstrap/src/core/config/config.rs
Lines 67 to 74 in 255aa22
profile = "tools"which by default usesdownload-rustc = "if-unchanged"../x test tests/rustdoc-jsonone time, to "prime" initial build caches.FORMAT_VERSIONinsrc/rustdoc-json-types, i.e.rustdoc-jsontests fail becauseFORMAT_VERSIONmismatch. Observe that with this patch, rustdoc gets properly rebuilt andrustdoc-jsontests pass.cc @aDotInTheVoid
r? Kobzol