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Only display difference of features, not all features

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This commit is contained in:
Oliver Schneider 2018-07-05 19:02:43 +02:00
parent 82a1328740
commit f1e3a5a24b
1 changed files with 22 additions and 4 deletions
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26
src/bootstrap/tool.rs
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@ -13,6 +13,7 @@ use std::env;
use std::iter;
use std::path::PathBuf;
use std::process::{Command, exit};
use std::collections::HashSet;
use Mode;
use Compiler;
@ -183,12 +184,29 @@ impl Step for ToolBuild {
typically means that something was recompiled because \
a transitive dependency has different features activated \
than in a previous build:\n");
println!("the following dependencies are duplicated although they \
have the same features enabled:");
for (id, cur, prev) in &duplicates {
println!(" {}", id);
if cur.2 == prev.2 {
// same features
println!(" `{}` ({:?})\n `{}` ({:?})", cur.0, cur.1, prev.0, prev.1);
}
}
println!("the following dependencies have different features:");
for (id, cur, prev) in duplicates {
println!(" {}", id);
println!(" `{}` enabled features {:?} at {:?}",
cur.0, cur.2, cur.1);
println!(" `{}` enabled features {:?} at {:?}",
prev.0, prev.2, prev.1);
if cur.2 == prev.2 {
continue;
}
let cur_features: HashSet<_> = cur.2.into_iter().collect();
let prev_features: HashSet<_> = prev.2.into_iter().collect();
let cur_extra: Vec<_> = cur_features.difference(&prev_features).collect();
let prev_extra: Vec<_> = prev_features.difference(&cur_features).collect();
println!(" `{}` additionally enabled features {:?} at {:?}",
cur.0, cur_extra, cur.1);
println!(" `{}` additionally enabled features {:?} at {:?}",
prev.0, prev_extra, prev.1);
}
println!("");
panic!("tools should not compile multiple copies of the same crate");