Initial commit

crates/lint-policy-cli/src/source/toml.rs

@@ -0,0 +1,41 @@
+//! TOML lint source.
+
+use std::fs;
+use std::path::Path;
+
+use anyhow::Context as _;
+use lint_policy::cargo;
+
+use crate::source::LintGroups;
+
+/// Query a TOML file for the list of included lints, panicking on any error.
+///
+/// # Panics
+/// If an error occurs while reading the file or parsing the content.
+pub(crate) fn read_lints(filepath: &Path) -> cargo::Lints {
+	#[expect(
+		clippy::expect_used,
+		reason = "errors here are not deisgned to be recoverable"
+	)]
+	private_read_lints(filepath)
+		.with_context(|| format!("reading lints from {}", filepath.display()))
+		.expect("toml source error")
+}
+
+/// Query a TOML file for the list of included lints.
+///
+/// # Errors
+/// IO can fail while reading the file, and TOML parsing can fail.
+fn private_read_lints(filepath: &Path) -> anyhow::Result<cargo::Lints> {
+	let contents = fs::read_to_string(filepath)?;
+	let manifest: cargo::Manifest = toml::from_str(&contents)?;
+	Ok(manifest.workspace.lints)
+}
+
+/// Query a TOML file for the list of included groups.
+///
+/// There is currently no differentiator between lints and groups so this function
+/// just returns [Default].
+pub(crate) fn read_groups(_: &Path) -> LintGroups {
+	LintGroups::default()
+}