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tidy: remove filtering for wasm32 deps, as this don't work #113449

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tidy: remove filtering for wasm32 deps, as this don't work #113449

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1 change: 0 additions & 1 deletion Cargo.lock
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Original file line number Diff line number Diff line change
Expand Up @@ -5453,7 +5453,6 @@ dependencies = [
name = "tidy"
version = "0.1.0"
dependencies = [
"cargo-platform",
"cargo_metadata 0.15.4",
"ignore",
"lazy_static",
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1 change: 0 additions & 1 deletion src/tools/tidy/Cargo.toml
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Expand Up @@ -6,7 +6,6 @@ autobins = false

[dependencies]
cargo_metadata = "0.15"
cargo-platform = "0.1.2"
regex = "1"
miropt-test-tools = { path = "../miropt-test-tools" }
lazy_static = "1"
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24 changes: 3 additions & 21 deletions src/tools/tidy/src/deps.rs
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Expand Up @@ -189,6 +189,7 @@ const PERMITTED_DEPS_LOCATION: &str = concat!(file!(), ":", line!());
/// rustc. Please check with the compiler team before adding an entry.
const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
// tidy-alphabetical-start
"addr2line",
"adler",
"ahash",
"aho-corasick",
Expand Down Expand Up @@ -429,6 +430,7 @@ const PERMITTED_CRANELIFT_DEPENDENCIES: &[&str] = &[
"mach",
"memchr",
"object",
"once_cell",
"regalloc2",
"region",
"rustc-hash",
Expand Down Expand Up @@ -614,27 +616,7 @@ fn check_permitted_dependencies(
let mut deps = HashSet::new();
for to_check in restricted_dependency_crates {
let to_check = pkg_from_name(metadata, to_check);
use cargo_platform::Cfg;
use std::str::FromStr;
// We don't expect the compiler to ever run on wasm32, so strip
// out those dependencies to avoid polluting the permitted list.
deps_of_filtered(metadata, &to_check.id, &mut deps, &|dep_kinds| {
dep_kinds.iter().any(|dep_kind| {
dep_kind
.target
.as_ref()
.map(|target| {
!target.matches(
"wasm32-unknown-unknown",
&[
Cfg::from_str("target_arch=\"wasm32\"").unwrap(),
Cfg::from_str("target_os=\"unknown\"").unwrap(),
],
)
Comment on lines -627 to -633
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@klensy klensy Jul 7, 2023 •
edited
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I don't know why, but one of suspects is https://docs.rs/cargo-platform/0.1.2/cargo_platform/enum.Platform.html#method.matches

It says "Returns whether the Platform matches the given target and cfg.", but what means "matches"?

Lets skip target part and look at cfg.

There can be 2 situations:

  1. cfg(not(windows)) matches cfg(target_arch="wasm32") (matches currently): which can be understand as: if X can be Y? But cfg(not(windows)) for example can be x86_64-unknown-linux-gnu which actually not matches cfg(target_arch="wasm32").
  2. If X has cfgs which is Y? cfg(all(target_arch="wasm32",target_os="unknown")) matches cfg(target_arch="wasm32") because target_arch is "wasm32".

But 2. can be broken again if cfg(any(target_arch="wasm32", target_arch="x86_64")) matched against cfg(target_arch="wasm32"), as it can be x86_64-unknown-linux-gnu again, which is not cfg(target_arch="wasm32").

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@klensy klensy Jul 12, 2023 •
edited
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Okay, looks like this don't work as i expected:
Name("wasm32-wasi").matches("", &[Cfg::from_str("target_arch=\"wasm32\"").unwrap(),]) == false, while should return true (ignore part that Platform::matches checks target or cfg).
cargo_platform works on strings and don't know to parse triples or if one cfg turn on other cfgs (for example target_env="msvc" should enable target_os="windows").

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Comments are messy (for me too, in month later), so, please ask question questions.

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We should try to make this work instead of getting rid of it entirely. If we really want to remove it, we can revert the changes that were made, but I don't believe this is the best solution for this situation.

})
.unwrap_or(true)
})
});
deps_of_filtered(metadata, &to_check.id, &mut deps, &|_| true);
}

// Check that the PERMITTED_DEPENDENCIES does not have unused entries.
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