Allow running Clippy lints via infra (#626)

...but don't error when it fails. This should help us prepare to
gradually adopt the linter and fix the relevant reported lints.

Part of #155

EDIT: This runs the lint command as usual and we control which lints we
warn against, so that we can gradually migrate.

Author: Xanewok

.cargo/config.toml

@@ -6,4 +6,84 @@ incremental = true
 lto = true
 
 [build]
-rustflags = ["--warn", "unused_crate_dependencies"]
+rustflags = [
+	"--warn",
+	"unused_crate_dependencies",
+	# This is a list of allowed Clippy rules for the purposes of gradual migration.
+	# See https://github.com/NomicFoundation/slang/pull/626
+	"-A",
+	"clippy::bool_assert_comparison",
+	"-A",
+	"clippy::borrow_interior_mutable_const",
+	"-A",
+	"clippy::cmp_owned",
+	"-A",
+	"clippy::collapsible_if",
+	"-A",
+	"clippy::comparison_chain",
+	"-A",
+	"clippy::declare_interior_mutable_const",
+	"-A",
+	"clippy::enum_variant_names",
+	"-A",
+	"clippy::expect_fun_call",
+	"-A",
+	"clippy::explicit_auto_deref",
+	"-A",
+	"clippy::from_over_into",
+	"-A",
+	"clippy::inherent_to_string",
+	"-A",
+	"clippy::into_iter_on_ref",
+	"-A",
+	"clippy::len_without_is_empty",
+	"-A",
+	"clippy::len_zero",
+	"-A",
+	"clippy::manual_range_contains",
+	"-A",
+	"clippy::match_like_matches_macro",
+	"-A",
+	"clippy::needless_borrow",
+	"-A",
+	"clippy::needless_range_loop",
+	"-A",
+	"clippy::needless_return",
+	"-A",
+	"clippy::new_without_default",
+	"-A",
+	"clippy::println_empty_string",
+	"-A",
+	"clippy::ptr_arg",
+	"-A",
+	"clippy::redundant_closure",
+	"-A",
+	"clippy::redundant_pattern",
+	"-A",
+	"clippy::redundant_pattern_matching",
+	"-A",
+	"clippy::redundant_static_lifetimes",
+	"-A",
+	"clippy::should_implement_trait",
+	"-A",
+	"clippy::single_char_add_str",
+	"-A",
+	"clippy::single_char_pattern",
+	"-A",
+	"clippy::to_string_in_format_args",
+	"-A",
+	"clippy::upper_case_acronyms",
+	"-A",
+	"clippy::useless_asref",
+	"-A",
+	"clippy::useless_conversion",
+	"-A",
+	"clippy::useless_format",
+	"-A",
+	"clippy::write_literal",
+	"-A",
+	"clippy::writeln_empty_string",
+	"-A",
+	"clippy::wrong_self_convention",
+
+]

.vscode/settings.json

@@ -7,7 +7,9 @@
     "**/generated/**": true
   },
   "rust-analyzer.check.allTargets": true,
+  "rust-analyzer.check.command": "clippy",
   "rust-analyzer.check.features": "all",
+  "rust-analyzer.checkOnSave": true,
   "rust-analyzer.server.path": "${workspaceFolder}/bin/rust-analyzer",
   "search.exclude": {
     // Packages and Dependencies

crates/infra/cli/generated/infra.zsh-completions

@@ -25,6 +25,9 @@ impl LintController {
 
 #[derive(Clone, Debug, Eq, Ord, PartialEq, PartialOrd, ValueEnum)]
 enum LintCommand {
+    /// Lints all Rust source files.
+    // Automatically applied lints may need to be formatted again, so we run this before formatting.
+    Clippy,
     /// Format all Rust source files.
     CargoFmt,
     /// Check for spelling issues in Markdown files.
@@ -48,6 +51,7 @@ impl OrderedCommand for LintCommand {
         Terminal::step(format!("lint {name}", name = self.clap_name()));
 
         return match self {
+            LintCommand::Clippy => run_clippy(),
             LintCommand::CargoFmt => run_cargo_fmt(),
             LintCommand::Cspell => run_cspell(),
             LintCommand::Prettier => run_prettier(),
@@ -60,6 +64,16 @@ impl OrderedCommand for LintCommand {
     }
 }
 
+fn run_clippy() -> Result<()> {
+    let mut clippy = Command::new("cargo").flag("clippy").flag("--");
+
+    if GitHub::is_running_in_ci() {
+        clippy = clippy.property("-D", "warnings");
+    }
+
+    clippy.run()
+}
+
 fn run_cargo_fmt() -> Result<()> {
     let mut command = Command::new("cargo-fmt").flag("--all").flag("--verbose");