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RalfJung opened this issue Apr 14, 2025 · 0 comments · Fixed by #139799
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rustc --print=foo=file is not documented in rustc --help -v #139794

RalfJung opened this issue Apr 14, 2025 · 0 comments · Fixed by #139799
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A-CLI Area: Command-line interface (CLI) to the compiler A-diagnostics Area: Messages for errors, warnings, and lints A-print-requests Area: print requests (`--print=...`) C-enhancement Category: An issue proposing an enhancement or a PR with one. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@RalfJung
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I recently learned from @Urgau that one can use something like rustc --print=cfg=file.txt to have rustc dump the output into a file rather than to stdout. This is mentioned in the rustc book but should also be documented in rustc --help -v.
@rustbot rustbot added the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Apr 14, 2025
@jieyouxu jieyouxu added A-diagnostics Area: Messages for errors, warnings, and lints T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. A-CLI Area: Command-line interface (CLI) to the compiler A-print-requests Area: print requests (`--print=...`) C-enhancement Category: An issue proposing an enhancement or a PR with one. and removed needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. labels Apr 14, 2025
This was referenced Apr 14, 2025
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Zalathar added a commit to Zalathar/rust that referenced this issue Apr 15, 2025
@Zalathar
Rollup merge of rust-lang#139799 - clubby789:print=file, r=jieyouxu
9551264 
Specify `--print info=file` syntax in `--help`

Closes rust-lang#139794

I moved the listing of information that can be printed to the help string as it's getting rather long and it makes the `[=FILE]` part easier to see
@bors bors closed this as completed in 7dc3fec Apr 15, 2025
rust-timer added a commit to rust-lang-ci/rust that referenced this issue Apr 15, 2025
@rust-timer
Unrolled build for rust-lang#139799
3d99991 
Rollup merge of rust-lang#139799 - clubby789:print=file, r=jieyouxu

Specify `--print info=file` syntax in `--help`

Closes rust-lang#139794

I moved the listing of information that can be printed to the help string as it's getting rather long and it makes the `[=FILE]` part easier to see
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A-CLI Area: Command-line interface (CLI) to the compiler A-diagnostics Area: Messages for errors, warnings, and lints A-print-requests Area: print requests (`--print=...`) C-enhancement Category: An issue proposing an enhancement or a PR with one. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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Specify --print info=file syntax in --help clubby789/rust
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@RalfJung @jieyouxu @rustbot