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doc: add --test-builder/--test-builder-wrapper

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Travis Finkenauer 2024-03-15 03:19:29 -07:00
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src/doc/rustdoc/src/command-line-arguments.md
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@ -427,3 +427,32 @@ This flag is **deprecated** and **has no effect**.
Rustdoc only supports Rust source code and Markdown input formats. If the
file ends in `.md` or `.markdown`, `rustdoc` treats it as a Markdown file.
Otherwise, it assumes that the input file is Rust.
## `--test-builder`: `rustc`-like program to build tests
Using this flag looks like this:
```bash
$ rustdoc --test-builder /path/to/rustc src/lib.rs
```
Rustdoc will use the provided program to compile tests instead of the default `rustc` program from
the sysroot.
## `--test-builder-wrapper`: wrap calls to the test builder
Using this flag looks like this:
```bash
$ rustdoc --test-builder-wrapper /path/to/rustc-wrapper src/lib.rs
$ rustdoc \
--test-builder-wrapper rustc-wrapper1 \
--test-builder-wrapper rustc-wrapper2 \
--test-builder rustc \
src/lib.rs
```
Similar to cargo `build.rustc-wrapper` option, this flag takes a `rustc` wrapper program.
The first argument to the program will be the test builder program.
This flag can be passed multiple times to nest wrappers.