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librustc_errors: Support ui-testing flag in annotate-snippet emitter
This adds support for the `-Z ui-testing` flag to the new
annotate-snippet diagnostic emitter.
Support for the flag was added to `annotate-snippet-rs` in these PRs:
* https://github.com/rust-lang/annotate-snippets-rs/pull/3
* https://github.com/rust-lang/annotate-snippets-rs/pull/5
r? @estebank
Closes #61811
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This adds support for the `-Z ui-testing` flag to the new
annotate-snippet diagnostic emitter.
The support for the flag was added to `annotate-snippet-rs` in these PRs:
* https://github.com/rust-lang/annotate-snippets-rs/pull/3
* https://github.com/rust-lang/annotate-snippets-rs/pull/5
Closes #61811
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Now that procedural macros no longer link transitively to libsyntax,
this shouldn't be needed any more! This commit is an experiment in
removing all dynamic libraries from rustc except for librustc_driver
itself. Let's see how far we can get with that!
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This adds a new diagnostic writer `AnnotateRsEmitterWriter` that uses
the [`annotate-snippet`][as] library to print out the human readable
diagnostics.
The goal is to eventually switch over to using the library instead of
maintaining our own diagnostics output.
This commit does *not* add all the required features to the new
diagnostics writer. It is only meant as a starting point so that other
people can contribute as well.
[as]: https://github.com/rust-lang/annotate-snippets-rs
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This is useful in debugging when and where errors are emitted in
logs.
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This crate moves the compiler's error reporting to using the `termcolor` crate
from crates.io. Previously rustc used a super-old version of the `term` crate
in-tree which is basically unmaintained at this point, but Cargo has been using
`termcolor` for some time now and tools like `rg` are using `termcolor` as well,
so it seems like a good strategy to take!
Note that the `term` crate remains in-tree for libtest. Changing libtest will be
a bit tricky due to how the build works, but we can always tackle that later.
cc #45728
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Otherwise they are a "hidden output"
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This commit is a rewrite of the user-facing interface to the rustbuild build
system. The intention here is to make it much easier to compile/test the project
without having to remember weird rule names and such. An overall view of the new
interface is:
# build everything
./x.py build
# document everyting
./x.py doc
# test everything
./x.py test
# test libstd
./x.py test src/libstd
# build libcore stage0
./x.py build src/libcore --stage 0
# run stage1 run-pass tests
./x.py test src/test/run-pass --stage 1
The `src/bootstrap/bootstrap.py` script is now aliased as a top-level `x.py`
script. This `x` was chosen to be both short and easily tab-completable (no
collisions in that namespace!). The build system now accepts a "subcommand" of
what to do next, the main ones being build/doc/test.
Each subcommand then receives an optional list of arguments. These arguments are
paths in the source repo of what to work with. That is, if you want to test a
directory, you just pass that directory as an argument.
The purpose of this rewrite is to do away with all of the arcane renames like
"rpass" is the "run-pass" suite, "cfail" is the "compile-fail" suite, etc. By
simply working with directories and files it's much more intuitive of how to run
a test (just pass it as an argument).
The rustbuild step/dependency management was also rewritten along the way to
make this easy to work with and define, but that's largely just a refactoring of
what was there before.
The *intention* is that this support is extended for arbitrary files (e.g.
`src/test/run-pass/my-test-case.rs`), but that isn't quite implemented just yet.
Instead directories work for now but we can follow up with stricter path
filtering logic to plumb through all the arguments.
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