cargo update & lint/clippy/rustfmt/cargo-deny fixes. (#3)

This fixes the remaining CI failures.

The `rustfmt.toml` change was prompted by @Firestar99's formatting
changes in #2, and the subsequent local rebasing, with `version = "Two"`
causing warnings due to:
- rust-lang/rustfmt#6247

So the perma-unstable `rustfmt.toml` `version` config is now
`style_edition = "2024"`, and hopefully that gets stabilized at the same
time as Rust 2024 becoming stable.

Author: eddyb

.github/workflows/ci.yml

@@ -18,11 +18,13 @@ jobs:
           submodules: true
       - uses: actions-rs/toolchain@v1
         with:
-          # HACK(eddyb) only nightly supports setting `version = "Two"`
-          # in `rustfmt.toml`, which is needed to format array/slice patterns
-          # at all (see https://github.com/rust-lang/rustfmt/pull/4994).
+          # FIXME(eddyb) `style_edition = "2024"` in `rustfmt.toml` is what keeps
+          # this on `nightly`, should switch to `stable` when that stabilizes.
           toolchain: nightly
-          override: true
+          # HACK(eddyb) use `nightly` by default without breaking the ability to
+          # temporarily bypass it through `rust-toolchain.toml`.
+          default: true
+          override: false
 
       # run cargo fetch w/ --locked to verify Cargo.lock is up-to-date
       - run: cargo fetch --locked
@@ -91,7 +93,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           submodules: true
-      - uses: EmbarkStudios/cargo-deny-action@v1
+      - uses: EmbarkStudios/cargo-deny-action@v2
 
   publish-check:
     name: Publish Check

Cargo.lock

@@ -34,6 +34,9 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 smallvec = { version = "1.7.0", features = ["serde", "union"] }
 
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = ['cfg(git_main_docs)'] }
+
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "docsrs", "--document-private-items"]

Cargo.toml

@@ -2,23 +2,17 @@
 # More documentation for the advisories section can be found here:
 # https://embarkstudios.github.io/cargo-deny/checks/advisories/cfg.html
 [advisories]
-# The lint level for security vulnerabilities
-vulnerability = "deny"
-# The lint level for unmaintained crates
-unmaintained = "deny"
+# NOTE(eddyb) see https://github.com/EmbarkStudios/cargo-deny/pull/611.
+version = 2
 # The lint level for crates that have been yanked from their source registry
 yanked = "deny"
-# The lint level for crates with security notices. Note that as of
-# 2019-12-17 there are no security notice advisories in
-# https://github.com/rustsec/advisory-db
-notice = "deny"
 
 # This section is considered when running `cargo deny check licenses`
 # More documentation for the licenses section can be found here:
 # https://embarkstudios.github.io/cargo-deny/checks/licenses/cfg.html
 [licenses]
-# The lint level for crates which do not have a detectable license
-unlicensed = "deny"
+# NOTE(eddyb) see https://github.com/EmbarkStudios/cargo-deny/pull/611.
+version = 2
 # List of explicitly allowed licenses
 # See https://spdx.org/licenses/ for list of possible licenses
 # [possible values: any SPDX 3.11 short identifier (+ optional exception)].
@@ -27,8 +21,6 @@ allow = [
     "Apache-2.0",
     "Unicode-DFS-2016",
 ]
-# Lint level for licenses considered copyleft
-copyleft = "deny"
 
 # This section is considered when running `cargo deny check bans`.
 # More documentation about the 'bans' section can be found here:
@@ -38,11 +30,6 @@ copyleft = "deny"
 multiple-versions = "deny"
 # Lint level for when a crate version requirement is `*`
 wildcards = "deny"
-# Certain crates/versions that will be skipped when doing duplicate detection.
-skip = [
-    # FIXME(eddyb) `syn 2` has not replaced `syn 1` across the ecosystem yet.
-    { name = "syn", version = "2" },
-]
 
 # This section is considered when running `cargo deny check sources`.
 # More documentation about the 'sources' section can be found here:

deny.toml

@@ -1,6 +1,4 @@
-# HACK(eddyb) needed to format array/slice patterns at all, because it was a
-# breaking change (see https://github.com/rust-lang/rustfmt/pull/4994).
-version = "Two"
+style_edition = "2024"
 
 # HACK(eddyb) avoid random spilling of e.g. method call chains onto many lines.
 use_small_heuristics = "Max"

rustfmt.toml

@@ -104,7 +104,6 @@
     clippy::match_wild_err_arm,
     clippy::match_wildcard_for_single_variants,
     clippy::mem_forget,
-    clippy::mismatched_target_os,
     clippy::missing_enforced_import_renames,
     clippy::mut_mut,
     clippy::mutex_integer,
@@ -145,6 +144,9 @@
     // NOTE(eddyb) ignored because it's misguided to suggest `let mut s = ...;`
     // and `s.push_str(...);` when `+` is equivalent and does not require `let`.
     clippy::string_add,
+
+    // FIXME(eddyb) rework doc comments to conform to linted expectations.
+    clippy::too_long_first_doc_paragraph,
 )]
 // NOTE(eddyb) this is stronger than the "Embark standard lints" above, because
 // we almost never need `unsafe` code and this is a further "speed bump" to it.