Initial commit

crates/lint-policy-cli/src/main.rs

@@ -0,0 +1,122 @@
+//! Generate lints for Cargo.toml.
+
+#![cfg_attr(docsrs, feature(doc_cfg))]
+
+use anyhow::Result;
+use clap::Parser as _;
+use lint_policy::Linter;
+use lint_policy::cargo::{LintTable, Manifest};
+use strum::IntoEnumIterator as _;
+
+mod cli;
+mod diff;
+mod group;
+mod source;
+
+use cli::Args;
+use diff::{Diff, diff};
+
+use crate::group::GroupTable;
+
+/// An empty lint table for unwrapping table references.
+static EMPTY_LINTS: LintTable = LintTable::new();
+/// An empty group table for unwrapping table references.
+static EMPTY_GROUPS: GroupTable = GroupTable::new();
+
+#[cfg_attr(test, expect(clippy::missing_errors_doc, reason = "main function"))]
+fn main() -> Result<()> {
+	let args = Args::parse();
+
+	let new_lints = args.read_new_source();
+	let old_lints = args.read_old_source();
+
+	match old_lints {
+		None => {
+			for linter in Linter::iter() {
+				// section
+				#[expect(clippy::print_stdout, reason = "printing out actual output")]
+				{
+					let mut manifest = Manifest::default();
+					manifest
+						.workspace
+						.lints
+						.set_lints_for(linter, LintTable::default());
+					print!("{}", toml::to_string(&manifest)?);
+				}
+
+				// lints
+				if let Some(lints) = new_lints.0.get_lints_for(linter) {
+					let mut value = String::new();
+					#[expect(clippy::print_stdout, reason = "printing out actual output")]
+					for lint in lints {
+						_ = serde::Serialize::serialize(
+							&lint.1,
+							toml::ser::ValueSerializer::new(&mut value),
+						)?;
+						println!("{} = {}", lint.0, value);
+						value.clear();
+					}
+				}
+			}
+		}
+		Some(old_lints) => {
+			for linter in Linter::iter() {
+				// section
+				#[expect(clippy::print_stdout, reason = "printing out actual output")]
+				{
+					let mut manifest = Manifest::default();
+					manifest
+						.workspace
+						.lints
+						.set_lints_for(linter, LintTable::default());
+					print!("{}", toml::to_string(&manifest)?);
+				}
+
+				// diff
+				let mut value = String::new();
+				let old_lints = old_lints.0.get_lints_for(linter).unwrap_or(&EMPTY_LINTS);
+				let (new_lints, new_groups) = (
+					new_lints.0.get_lints_for(linter).unwrap_or(&EMPTY_LINTS),
+					new_lints.1.get_groups_for(linter).unwrap_or(&EMPTY_GROUPS),
+				);
+				for diff in diff(old_lints, new_lints, new_groups) {
+					#[expect(clippy::print_stdout, reason = "printing out actual output")]
+					match diff {
+						Diff::Added { name, new } => {
+							_ = serde::Serialize::serialize(
+								&new,
+								toml::ser::ValueSerializer::new(&mut value),
+							)?;
+							println!("+ {name} = {value}");
+						}
+						Diff::Removed { name, old } => {
+							_ = serde::Serialize::serialize(
+								&old,
+								toml::ser::ValueSerializer::new(&mut value),
+							)?;
+							println!("- {name} = {value}");
+						}
+						Diff::Modified { name, old, new } => {
+							if !args.ignore_level() {
+								_ = serde::Serialize::serialize(
+									&old,
+									toml::ser::ValueSerializer::new(&mut value),
+								)?;
+								print!("~ {name} = {value}");
+								value.clear();
+								_ = serde::Serialize::serialize(
+									&new,
+									toml::ser::ValueSerializer::new(&mut value),
+								)?;
+								println!(" => {value}");
+							}
+						}
+					}
+					value.clear();
+				}
+			}
+		}
+	}
+
+	Ok(())
+}