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Fix documenting with undocumented dependencies. #10324
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…xcrichton Fix documenting with undocumented dependencies. rust-lang#10201 introduced a bug where dependencies that have `doc=false` weren't being built at all when running `cargo doc` if the project did not have any binaries. That means the rmeta file was missing, and the `--extern` flag was not being passed to rustdoc. The solution is to ensure the `rmeta` file gets generated, but only skip generating the `CompileMode::Doc` unit for undocumented dependencies. This unblocks the bootstrap bump.
    
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…chton [beta] Fix documenting with undocumented dependencies. Beta backport of #10324
    
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Update cargo 9 commits in 95bb3c92bf516017e812e7f1c14c2dea3845b30e..1c034752de0df744fcd7788fcbca158830b8bf85 2022-01-18 17:39:35 +0000 to 2022-01-25 22:36:53 +0000 - Sync toml_edit versions (rust-lang/cargo#10329) - Check --config for dotted keys only (rust-lang/cargo#10176) - Remove deprecated --host arg for search and publish cmds (rust-lang/cargo#10327) - doc: it's valid to use OUT_DIR for intermediate artifacts (rust-lang/cargo#10326) - Use local git info for version. (rust-lang/cargo#10323) - Fix documenting with undocumented dependencies. (rust-lang/cargo#10324) - do not compile test for bins flagged as `test = false` (rust-lang/cargo#10305) - Port cargo from toml-rs to toml_edit (rust-lang/cargo#10086) - Fix new::git_default_branch with different default (rust-lang/cargo#10306)
  
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#10201 introduced a bug where dependencies that have
doc=falseweren't being built at all when runningcargo docif the project did not have any binaries. That means the rmeta file was missing, and the--externflag was not being passed to rustdoc.The solution is to ensure the
rmetafile gets generated, but only skip generating theCompileMode::Docunit for undocumented dependencies.This unblocks the bootstrap bump.