ssh-derive: configure and apply workspace-level lints

Adds the workspace-level config from RustCrypto/utils#1411 to this
repo and applies it to `ssh-derive`.

Author: tarcieri

.clippy.toml

@@ -0,0 +1,2 @@
+allow-unwrap-in-consts = true
+allow-unwrap-in-tests = true

.github/workflows/workspace.yml

@@ -21,9 +21,9 @@ jobs:
       - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: 1.92 # pinned to prevent breakages when new rust versions are released
+          toolchain: 1.95 # pinned to prevent breakages when new rust versions are released
           components: clippy
-      - run: cargo clippy --all-features
+      - run: cargo clippy --all-features --all-targets
 
   doc:
     runs-on: ubuntu-latest
@@ -33,7 +33,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: stable
-      - run: cargo doc --workspace --all-features
+      - run: cargo doc --workspace --all-features --no-deps
 
   rustfmt:
     runs-on: ubuntu-latest

Cargo.toml

@@ -8,11 +8,53 @@ members = [
     "ssh-protocol",
 ]
 
-[profile.dev]
-opt-level = 2
-
 [patch.crates-io]
 ssh-cipher = { path = "./ssh-cipher" }
 ssh-derive = { path = "./ssh-derive" }
 ssh-encoding = { path = "./ssh-encoding" }
 ssh-key = { path = "./ssh-key" }
+
+[profile.dev]
+opt-level = 2
+
+[workspace.lints.clippy]
+as_conversions = "warn"
+borrow_as_ptr = "warn"
+cast_lossless = "warn"
+cast_possible_truncation = "warn"
+cast_possible_wrap = "warn"
+cast_precision_loss = "warn"
+cast_sign_loss = "warn"
+checked_conversions = "warn"
+from_iter_instead_of_collect = "warn"
+implicit_saturating_sub = "warn"
+integer_division_remainder_used = "warn"
+manual_assert = "warn"
+map_unwrap_or = "warn"
+missing_errors_doc = "warn"
+missing_panics_doc = "warn"
+mod_module_files = "warn"
+must_use_candidate = "warn"
+needless_range_loop = "allow"
+ptr_as_ptr = "warn"
+redundant_closure_for_method_calls = "warn"
+ref_as_ptr = "warn"
+return_self_not_must_use = "warn"
+semicolon_if_nothing_returned = "warn"
+trivially_copy_pass_by_ref = "warn"
+std_instead_of_alloc = "warn"
+std_instead_of_core = "warn"
+undocumented_unsafe_blocks = "warn"
+unnecessary_safety_comment = "warn"
+unwrap_used = "warn"
+
+[workspace.lints.rust]
+missing_copy_implementations = "warn"
+missing_debug_implementations = "warn"
+missing_docs = "warn"
+trivial_casts = "warn"
+trivial_numeric_casts = "warn"
+unreachable_pub = "warn"
+unsafe_code = "forbid"
+unused_lifetimes = "warn"
+unused_qualifications = "warn"

ssh-derive/Cargo.toml

@@ -12,10 +12,13 @@ readme = "README.md"
 edition = "2024"
 rust-version = "1.85"
 
-[lib]
-proc-macro = true
-
 [dependencies]
 proc-macro2 = "1"
 quote = "1"
 syn = { version = "2", features = ["extra-traits"] }
+
+[lib]
+proc-macro = true
+
+[lints]
+workspace = true

ssh-derive/src/encode.rs

@@ -222,8 +222,8 @@ fn fields_variables(fields: &syn::Fields, use_self: bool) -> Vec<TokenStream> {
 
 #[cfg(test)]
 mod tests {
-    #![allow(clippy::unwrap_used)]
     use super::*;
+    use core::iter;
     use proc_macro2::Span;
     use quote::quote;
 
@@ -322,7 +322,7 @@ mod tests {
             discriminant_type: None,
             length_prefixed: false,
         };
-        let err = derive_for_variants(&container_attributes, std::iter::once(&variant), &enum_name)
+        let err = derive_for_variants(&container_attributes, iter::once(&variant), &enum_name)
             .unwrap_err();
         assert_eq!(
             err.to_string(),
@@ -338,7 +338,7 @@ mod tests {
             discriminant_type: Some(quote! { u8 }),
             length_prefixed: false,
         };
-        let err = derive_for_variants(&container_attributes, std::iter::once(&variant), &enum_name)
+        let err = derive_for_variants(&container_attributes, iter::once(&variant), &enum_name)
             .unwrap_err();
         assert_eq!(
             err.to_string(),

ssh-derive/src/lib.rs

@@ -1,3 +1,4 @@
+#![crate_type = "proc-macro"]
 #![doc = include_str!("../README.md")]
 
 //! ## About
@@ -9,15 +10,6 @@
 //!
 //! [`ssh-encoding`]: ../ssh-encoding
 
-#![crate_type = "proc-macro"]
-#![forbid(unsafe_code)]
-#![warn(
-    clippy::unwrap_used,
-    rust_2018_idioms,
-    trivial_casts,
-    unused_qualifications
-)]
-
 macro_rules! abort {
     ( $tokens:expr, $message:expr $(,)? ) => {
         return Err(syn::Error::new_spanned($tokens, $message))