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Rollup merge of #99864 - klensy:bootstrap-art-dupe, r=jyn514

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bootstrap: don't emit warn about duplicated deps with same/different features if some of sets actually empty

Example (https://github.com/rust-lang-ci/rust/runs/7551453940?check_suite_focus=true#step:25:15008):
```
 duplicate artifacts found when compiling a tool, this typically means that something was recompiled because a transitive dependency has different features activated than in a previous build:

the following dependencies are duplicated although they have the same features enabled:
the following dependencies have different features:
  memchr 2.5.0 (registry+https://github.com/rust-lang/crates.io-index)
    `clippy-driver` additionally enabled features {} at "/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/x86_64-unknown-freebsd/release/deps/libmemchr-44aa6ff4f08e293f.rlib"
    `cargo` additionally enabled features {"use_std"} at "/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/x86_64-unknown-freebsd/release/deps/libmemchr-70e29af0fd3ef292.rlib"
```

Notice that no info printed under  `the following dependencies are duplicated although they have the same features enabled:`
This commit is contained in:
Matthias Krüger 2022-08-01 16:49:30 +02:00 • committed by GitHub
commit 1530ed8373
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1 changed files with 29 additions and 25 deletions
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54
src/bootstrap/tool.rs
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@ -158,34 +158,38 @@ impl Step for ToolBuild {
a transitive dependency has different features activated \
than in a previous build:\n"
);
eprintln!(
"the following dependencies are duplicated although they \
have the same features enabled:"
);
let (same, different): (Vec<_>, Vec<_>) =
duplicates.into_iter().partition(|(_, cur, prev)| cur.2 == prev.2);
for (id, cur, prev) in same {
eprintln!(" {}", id);
// same features
eprintln!(" `{}` ({:?})\n `{}` ({:?})", cur.0, cur.1, prev.0, prev.1);
if !same.is_empty() {
eprintln!(
"the following dependencies are duplicated although they \
have the same features enabled:"
);
for (id, cur, prev) in same {
eprintln!(" {}", id);
// same features
eprintln!(" `{}` ({:?})\n `{}` ({:?})", cur.0, cur.1, prev.0, prev.1);
}
}
eprintln!("the following dependencies have different features:");
for (id, cur, prev) in different {
eprintln!(" {}", id);
let cur_features: HashSet<_> = cur.2.into_iter().collect();
let prev_features: HashSet<_> = prev.2.into_iter().collect();
eprintln!(
" `{}` additionally enabled features {:?} at {:?}",
cur.0,
&cur_features - &prev_features,
cur.1
);
eprintln!(
" `{}` additionally enabled features {:?} at {:?}",
prev.0,
&prev_features - &cur_features,
prev.1
);
if !different.is_empty() {
eprintln!("the following dependencies have different features:");
for (id, cur, prev) in different {
eprintln!(" {}", id);
let cur_features: HashSet<_> = cur.2.into_iter().collect();
let prev_features: HashSet<_> = prev.2.into_iter().collect();
eprintln!(
" `{}` additionally enabled features {:?} at {:?}",
cur.0,
&cur_features - &prev_features,
cur.1
);
eprintln!(
" `{}` additionally enabled features {:?} at {:?}",
prev.0,
&prev_features - &cur_features,
prev.1
);
}
}
eprintln!();
eprintln!(