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bootstrap: lower verbosity of cargo to one less than bootstrap's #146609

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Sep 16, 2025
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bootstrap: lower verbosity of cargo to one less than bootstrap's #146609

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bootstrap: lower verbosity of cargo to one less than bootstrap's 
the main thing this does is eliminate the "Fresh ..." output when
`--verbose` is only passed once.
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@lolbinarycat
lolbinarycat committed Sep 15, 2025
commit 29ca09be09a88f359adc7879e2592f36f6c74a64
3 changes: 2 additions & 1 deletion src/bootstrap/bootstrap.py
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Expand Up @@ -1145,7 +1145,8 @@ def build_bootstrap_cmd(self, env):
os.path.join(self.rust_root, "src/bootstrap/Cargo.toml"),
"-Zroot-dir=" + self.rust_root,
]
args.extend("--verbose" for _ in range(self.verbose))
# verbose cargo output is very noisy, so only enable it with -vv
args.extend("--verbose" for _ in range(self.verbose - 1))

if "BOOTSTRAP_TRACING" in env:
args.append("--features=tracing")
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3 changes: 0 additions & 3 deletions src/bootstrap/src/core/build_steps/test.rs
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Expand Up @@ -3418,9 +3418,6 @@ impl Step for TierCheck {
);
cargo.arg(builder.src.join("src/doc/rustc/src/platform-support.md"));
cargo.arg(builder.rustc(self.test_compiler));
if builder.is_verbose() {
cargo.arg("--verbose");
}
Comment on lines -3421 to -3423
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We're already setting verbosity in Builder::cargo, which is indirectly called by prepare_tool_cargo, so this is not needed.


let _guard = builder.msg_test(
"platform support check",
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7 changes: 4 additions & 3 deletions src/bootstrap/src/core/builder/cargo.rs
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Expand Up @@ -1133,7 +1133,7 @@ impl Builder<'_> {
cargo.env("RUSTC_BACKTRACE_ON_ICE", "1");
}

if self.is_verbose() {
if self.is_verbose_than(1) {
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Huh, that's a weird (pre-existing) function name. I had to look at the code to understand what it meant. is_more_verbose_than would be clearer. Even clearer would be just removing it and using if self.verbosity > 1 directly. The related verbose_than function could also be removed.

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Yeah, the names are pretty terrible here, I plan to rename them, once I get to it.

// This provides very useful logs especially when debugging build cache-related stuff.
cargo.env("CARGO_LOG", "cargo::core::compiler::fingerprint=info");
}
Expand Down Expand Up @@ -1275,8 +1275,9 @@ impl Builder<'_> {
cargo.env("WINAPI_NO_BUNDLED_LIBRARIES", "1");
}

for _ in 0..self.verbosity {
cargo.arg("-v");
// verbose cargo output is very noisy, so only enable it with -vv
for _ in 0..self.verbosity.saturating_sub(1) {
cargo.arg("--verbose");
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changed from -v to --verbose for consistency and grepability.

}

match (mode, self.config.rust_codegen_units_std, self.config.rust_codegen_units) {
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