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Make bootstrap be more informative when one does `x.py test` on a beta checkout without other mods. 

To be clear, by default running `x.py test` on a checkout of the beta branch
currently fails, and with this change will continue to fail, because `x.py
tests` runs `x.py test src/tools/tidy` which tries to run `rustfmt` and that
will fail because the `rustfmt` binary is pinned to the current nighlty and we
do not attempt to distribute one for the beta builds.

This change gives a better error message than the current message, which is just
"./x.py fmt is not supported on this channel" without providing any hint about
what one might do about that problem.

(update: placated tidy.)
This commit is contained in:
Felix S. Klock II 2021-03-15 17:37:06 -04:00
parent 107896c32d
commit d6de60fb32
1 changed files with 13 additions and 0 deletions
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13
src/bootstrap/test.rs
View File

@ -791,6 +791,19 @@ impl Step for Tidy {
if builder.config.channel == "dev" || builder.config.channel == "nightly" {
builder.info("fmt check");
if builder.config.initial_rustfmt.is_none() {
let inferred_rustfmt_dir = builder.config.initial_rustc.parent().unwrap();
eprintln!(
"\
error: no `rustfmt` binary found in {PATH}
info: `rust.channel` is currently set to \"{CHAN}\"
help: if you are testing a beta branch, set `rust.channel` to \"beta\" in the `config.toml` file
help: to skip test's attempt to check tidiness, pass `--exclude src/tools/tidy` to `x.py test`",
PATH = inferred_rustfmt_dir.display(),
CHAN = builder.config.channel,
);
std::process::exit(1);
}
crate::format::format(&builder.build, !builder.config.cmd.bless());
}
}